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-rw-r--r--arch/x86/kernel/cpu/Makefile5
-rw-r--r--arch/x86/kernel/cpu/addon_cpuid_features.c2
-rw-r--r--arch/x86/kernel/cpu/amd.c54
-rw-r--r--arch/x86/kernel/cpu/centaur.c36
-rw-r--r--arch/x86/kernel/cpu/centaur_64.c37
-rw-r--r--arch/x86/kernel/cpu/common.c405
-rw-r--r--arch/x86/kernel/cpu/cpu.h25
-rwxr-xr-xarch/x86/kernel/cpu/cpu_debug.c901
-rw-r--r--arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c16
-rw-r--r--arch/x86/kernel/cpu/cpufreq/longhaul.c6
-rw-r--r--arch/x86/kernel/cpu/cpufreq/p4-clockmod.c2
-rw-r--r--arch/x86/kernel/cpu/cpufreq/powernow-k8.c13
-rw-r--r--arch/x86/kernel/cpu/cpufreq/speedstep-ich.c2
-rw-r--r--arch/x86/kernel/cpu/cyrix.c16
-rw-r--r--arch/x86/kernel/cpu/intel.c32
-rw-r--r--arch/x86/kernel/cpu/intel_cacheinfo.c32
-rw-r--r--arch/x86/kernel/cpu/mcheck/Makefile1
-rw-r--r--arch/x86/kernel/cpu/mcheck/mce_32.c14
-rw-r--r--arch/x86/kernel/cpu/mcheck/mce_64.c540
-rw-r--r--arch/x86/kernel/cpu/mcheck/mce_amd_64.c68
-rw-r--r--arch/x86/kernel/cpu/mcheck/mce_intel_64.c207
-rw-r--r--arch/x86/kernel/cpu/mcheck/threshold.c29
-rw-r--r--arch/x86/kernel/cpu/mtrr/Makefile2
-rw-r--r--arch/x86/kernel/cpu/mtrr/cleanup.c1101
-rw-r--r--arch/x86/kernel/cpu/mtrr/generic.c199
-rw-r--r--arch/x86/kernel/cpu/mtrr/if.c10
-rw-r--r--arch/x86/kernel/cpu/mtrr/main.c1069
-rw-r--r--arch/x86/kernel/cpu/mtrr/mtrr.h4
-rw-r--r--arch/x86/kernel/cpu/proc.c6
-rw-r--r--arch/x86/kernel/cpu/transmeta.c2
-rw-r--r--arch/x86/kernel/cpu/umc.c2
31 files changed, 3228 insertions, 1610 deletions
diff --git a/arch/x86/kernel/cpu/Makefile b/arch/x86/kernel/cpu/Makefile
index 82db7f45e2de..4e242f9a06e4 100644
--- a/arch/x86/kernel/cpu/Makefile
+++ b/arch/x86/kernel/cpu/Makefile
@@ -14,11 +14,12 @@ obj-y += vmware.o hypervisor.o
obj-$(CONFIG_X86_32) += bugs.o cmpxchg.o
obj-$(CONFIG_X86_64) += bugs_64.o
+obj-$(CONFIG_X86_CPU_DEBUG) += cpu_debug.o
+
obj-$(CONFIG_CPU_SUP_INTEL) += intel.o
obj-$(CONFIG_CPU_SUP_AMD) += amd.o
obj-$(CONFIG_CPU_SUP_CYRIX_32) += cyrix.o
-obj-$(CONFIG_CPU_SUP_CENTAUR_32) += centaur.o
-obj-$(CONFIG_CPU_SUP_CENTAUR_64) += centaur_64.o
+obj-$(CONFIG_CPU_SUP_CENTAUR) += centaur.o
obj-$(CONFIG_CPU_SUP_TRANSMETA_32) += transmeta.o
obj-$(CONFIG_CPU_SUP_UMC_32) += umc.o
diff --git a/arch/x86/kernel/cpu/addon_cpuid_features.c b/arch/x86/kernel/cpu/addon_cpuid_features.c
index 6882a735d9c0..8220ae69849d 100644
--- a/arch/x86/kernel/cpu/addon_cpuid_features.c
+++ b/arch/x86/kernel/cpu/addon_cpuid_features.c
@@ -29,7 +29,7 @@ void __cpuinit init_scattered_cpuid_features(struct cpuinfo_x86 *c)
u32 regs[4];
const struct cpuid_bit *cb;
- static const struct cpuid_bit cpuid_bits[] = {
+ static const struct cpuid_bit __cpuinitconst cpuid_bits[] = {
{ X86_FEATURE_IDA, CR_EAX, 1, 0x00000006 },
{ 0, 0, 0, 0 }
};
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index 25423a5b80ed..7e4a459daa64 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -5,6 +5,7 @@
#include <asm/io.h>
#include <asm/processor.h>
#include <asm/apic.h>
+#include <asm/cpu.h>
#ifdef CONFIG_X86_64
# include <asm/numa_64.h>
@@ -141,6 +142,55 @@ static void __cpuinit init_amd_k6(struct cpuinfo_x86 *c)
}
}
+static void __cpuinit amd_k7_smp_check(struct cpuinfo_x86 *c)
+{
+#ifdef CONFIG_SMP
+ /* calling is from identify_secondary_cpu() ? */
+ if (c->cpu_index == boot_cpu_id)
+ return;
+
+ /*
+ * Certain Athlons might work (for various values of 'work') in SMP
+ * but they are not certified as MP capable.
+ */
+ /* Athlon 660/661 is valid. */
+ if ((c->x86_model == 6) && ((c->x86_mask == 0) ||
+ (c->x86_mask == 1)))
+ goto valid_k7;
+
+ /* Duron 670 is valid */
+ if ((c->x86_model == 7) && (c->x86_mask == 0))
+ goto valid_k7;
+
+ /*
+ * Athlon 662, Duron 671, and Athlon >model 7 have capability
+ * bit. It's worth noting that the A5 stepping (662) of some
+ * Athlon XP's have the MP bit set.
+ * See http://www.heise.de/newsticker/data/jow-18.10.01-000 for
+ * more.
+ */
+ if (((c->x86_model == 6) && (c->x86_mask >= 2)) ||
+ ((c->x86_model == 7) && (c->x86_mask >= 1)) ||
+ (c->x86_model > 7))
+ if (cpu_has_mp)
+ goto valid_k7;
+
+ /* If we get here, not a certified SMP capable AMD system. */
+
+ /*
+ * Don't taint if we are running SMP kernel on a single non-MP
+ * approved Athlon
+ */
+ WARN_ONCE(1, "WARNING: This combination of AMD"
+ "processors is not suitable for SMP.\n");
+ if (!test_taint(TAINT_UNSAFE_SMP))
+ add_taint(TAINT_UNSAFE_SMP);
+
+valid_k7:
+ ;
+#endif
+}
+
static void __cpuinit init_amd_k7(struct cpuinfo_x86 *c)
{
u32 l, h;
@@ -175,6 +225,8 @@ static void __cpuinit init_amd_k7(struct cpuinfo_x86 *c)
}
set_cpu_cap(c, X86_FEATURE_K7);
+
+ amd_k7_smp_check(c);
}
#endif
@@ -450,7 +502,7 @@ static unsigned int __cpuinit amd_size_cache(struct cpuinfo_x86 *c, unsigned int
}
#endif
-static struct cpu_dev amd_cpu_dev __cpuinitdata = {
+static const struct cpu_dev __cpuinitconst amd_cpu_dev = {
.c_vendor = "AMD",
.c_ident = { "AuthenticAMD" },
#ifdef CONFIG_X86_32
diff --git a/arch/x86/kernel/cpu/centaur.c b/arch/x86/kernel/cpu/centaur.c
index 89bfdd9cacc6..c95e831bb095 100644
--- a/arch/x86/kernel/cpu/centaur.c
+++ b/arch/x86/kernel/cpu/centaur.c
@@ -1,11 +1,11 @@
+#include <linux/bitops.h>
#include <linux/kernel.h>
#include <linux/init.h>
-#include <linux/bitops.h>
#include <asm/processor.h>
-#include <asm/msr.h>
#include <asm/e820.h>
#include <asm/mtrr.h>
+#include <asm/msr.h>
#include "cpu.h"
@@ -276,7 +276,7 @@ static void __cpuinit init_c3(struct cpuinfo_x86 *c)
*/
c->x86_capability[5] = cpuid_edx(0xC0000001);
}
-
+#ifdef CONFIG_X86_32
/* Cyrix III family needs CX8 & PGE explicitly enabled. */
if (c->x86_model >= 6 && c->x86_model <= 9) {
rdmsr(MSR_VIA_FCR, lo, hi);
@@ -288,6 +288,11 @@ static void __cpuinit init_c3(struct cpuinfo_x86 *c)
/* Before Nehemiah, the C3's had 3dNOW! */
if (c->x86_model >= 6 && c->x86_model < 9)
set_cpu_cap(c, X86_FEATURE_3DNOW);
+#endif
+ if (c->x86 == 0x6 && c->x86_model >= 0xf) {
+ c->x86_cache_alignment = c->x86_clflush_size * 2;
+ set_cpu_cap(c, X86_FEATURE_REP_GOOD);
+ }
display_cacheinfo(c);
}
@@ -316,16 +321,25 @@ enum {
static void __cpuinit early_init_centaur(struct cpuinfo_x86 *c)
{
switch (c->x86) {
+#ifdef CONFIG_X86_32
case 5:
/* Emulate MTRRs using Centaur's MCR. */
set_cpu_cap(c, X86_FEATURE_CENTAUR_MCR);
break;
+#endif
+ case 6:
+ if (c->x86_model >= 0xf)
+ set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
+ break;
}
+#ifdef CONFIG_X86_64
+ set_cpu_cap(c, X86_FEATURE_SYSENTER32);
+#endif
}
static void __cpuinit init_centaur(struct cpuinfo_x86 *c)
{
-
+#ifdef CONFIG_X86_32
char *name;
u32 fcr_set = 0;
u32 fcr_clr = 0;
@@ -337,8 +351,10 @@ static void __cpuinit init_centaur(struct cpuinfo_x86 *c)
* 3DNow is IDd by bit 31 in extended CPUID (1*32+31) anyway
*/
clear_cpu_cap(c, 0*32+31);
-
+#endif
+ early_init_centaur(c);
switch (c->x86) {
+#ifdef CONFIG_X86_32
case 5:
switch (c->x86_model) {
case 4:
@@ -442,16 +458,20 @@ static void __cpuinit init_centaur(struct cpuinfo_x86 *c)
}
sprintf(c->x86_model_id, "WinChip %s", name);
break;
-
+#endif
case 6:
init_c3(c);
break;
}
+#ifdef CONFIG_X86_64
+ set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
+#endif
}
static unsigned int __cpuinit
centaur_size_cache(struct cpuinfo_x86 *c, unsigned int size)
{
+#ifdef CONFIG_X86_32
/* VIA C3 CPUs (670-68F) need further shifting. */
if ((c->x86 == 6) && ((c->x86_model == 7) || (c->x86_model == 8)))
size >>= 8;
@@ -464,11 +484,11 @@ centaur_size_cache(struct cpuinfo_x86 *c, unsigned int size)
if ((c->x86 == 6) && (c->x86_model == 9) &&
(c->x86_mask == 1) && (size == 65))
size -= 1;
-
+#endif
return size;
}
-static struct cpu_dev centaur_cpu_dev __cpuinitdata = {
+static const struct cpu_dev __cpuinitconst centaur_cpu_dev = {
.c_vendor = "Centaur",
.c_ident = { "CentaurHauls" },
.c_early_init = early_init_centaur,
diff --git a/arch/x86/kernel/cpu/centaur_64.c b/arch/x86/kernel/cpu/centaur_64.c
deleted file mode 100644
index a1625f5a1e78..000000000000
--- a/arch/x86/kernel/cpu/centaur_64.c
+++ /dev/null
@@ -1,37 +0,0 @@
-#include <linux/init.h>
-#include <linux/smp.h>
-
-#include <asm/cpufeature.h>
-#include <asm/processor.h>
-
-#include "cpu.h"
-
-static void __cpuinit early_init_centaur(struct cpuinfo_x86 *c)
-{
- if (c->x86 == 0x6 && c->x86_model >= 0xf)
- set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
-
- set_cpu_cap(c, X86_FEATURE_SYSENTER32);
-}
-
-static void __cpuinit init_centaur(struct cpuinfo_x86 *c)
-{
- early_init_centaur(c);
-
- if (c->x86 == 0x6 && c->x86_model >= 0xf) {
- c->x86_cache_alignment = c->x86_clflush_size * 2;
- set_cpu_cap(c, X86_FEATURE_REP_GOOD);
- }
- set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
-}
-
-static struct cpu_dev centaur_cpu_dev __cpuinitdata = {
- .c_vendor = "Centaur",
- .c_ident = { "CentaurHauls" },
- .c_early_init = early_init_centaur,
- .c_init = init_centaur,
- .c_x86_vendor = X86_VENDOR_CENTAUR,
-};
-
-cpu_dev_register(centaur_cpu_dev);
-
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 826d5c876278..c4f667896c28 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1,52 +1,50 @@
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/string.h>
#include <linux/bootmem.h>
+#include <linux/linkage.h>
#include <linux/bitops.h>
+#include <linux/kernel.h>
#include <linux/module.h>
-#include <linux/kgdb.h>
-#include <linux/topology.h>
+#include <linux/percpu.h>
+#include <linux/string.h>
#include <linux/delay.h>
+#include <linux/sched.h>
+#include <linux/init.h>
+#include <linux/kgdb.h>
#include <linux/smp.h>
-#include <linux/percpu.h>
-#include <asm/i387.h>
-#include <asm/msr.h>
-#include <asm/io.h>
-#include <asm/linkage.h>
+#include <linux/io.h>
+
+#include <asm/stackprotector.h>
#include <asm/mmu_context.h>
+#include <asm/hypervisor.h>
+#include <asm/processor.h>
+#include <asm/sections.h>
+#include <asm/topology.h>
+#include <asm/cpumask.h>
+#include <asm/pgtable.h>
+#include <asm/atomic.h>
+#include <asm/proto.h>
+#include <asm/setup.h>
+#include <asm/apic.h>
+#include <asm/desc.h>
+#include <asm/i387.h>
#include <asm/mtrr.h>
+#include <asm/numa.h>
+#include <asm/asm.h>
+#include <asm/cpu.h>
#include <asm/mce.h>
+#include <asm/msr.h>
#include <asm/pat.h>
-#include <asm/asm.h>
-#include <asm/numa.h>
#include <asm/smp.h>
-#include <asm/cpu.h>
-#include <asm/cpumask.h>
-#include <asm/apic.h>
#ifdef CONFIG_X86_LOCAL_APIC
#include <asm/uv/uv.h>
#endif
-#include <asm/pgtable.h>
-#include <asm/processor.h>
-#include <asm/desc.h>
-#include <asm/atomic.h>
-#include <asm/proto.h>
-#include <asm/sections.h>
-#include <asm/setup.h>
-#include <asm/hypervisor.h>
-#include <asm/stackprotector.h>
-
#include "cpu.h"
-#ifdef CONFIG_X86_64
-
/* all of these masks are initialized in setup_cpu_local_masks() */
-cpumask_var_t cpu_callin_mask;
-cpumask_var_t cpu_callout_mask;
cpumask_var_t cpu_initialized_mask;
+cpumask_var_t cpu_callout_mask;
+cpumask_var_t cpu_callin_mask;
/* representing cpus for which sibling maps can be computed */
cpumask_var_t cpu_sibling_setup_mask;
@@ -60,17 +58,7 @@ void __init setup_cpu_local_masks(void)
alloc_bootmem_cpumask_var(&cpu_sibling_setup_mask);
}
-#else /* CONFIG_X86_32 */
-
-cpumask_t cpu_callin_map;
-cpumask_t cpu_callout_map;
-cpumask_t cpu_initialized;
-cpumask_t cpu_sibling_setup_map;
-
-#endif /* CONFIG_X86_32 */
-
-
-static struct cpu_dev *this_cpu __cpuinitdata;
+static const struct cpu_dev *this_cpu __cpuinitdata;
DEFINE_PER_CPU_PAGE_ALIGNED(struct gdt_page, gdt_page) = { .gdt = {
#ifdef CONFIG_X86_64
@@ -79,48 +67,48 @@ DEFINE_PER_CPU_PAGE_ALIGNED(struct gdt_page, gdt_page) = { .gdt = {
* IRET will check the segment types kkeil 2000/10/28
* Also sysret mandates a special GDT layout
*
- * The TLS descriptors are currently at a different place compared to i386.
+ * TLS descriptors are currently at a different place compared to i386.
* Hopefully nobody expects them at a fixed place (Wine?)
*/
- [GDT_ENTRY_KERNEL32_CS] = { { { 0x0000ffff, 0x00cf9b00 } } },
- [GDT_ENTRY_KERNEL_CS] = { { { 0x0000ffff, 0x00af9b00 } } },
- [GDT_ENTRY_KERNEL_DS] = { { { 0x0000ffff, 0x00cf9300 } } },
- [GDT_ENTRY_DEFAULT_USER32_CS] = { { { 0x0000ffff, 0x00cffb00 } } },
- [GDT_ENTRY_DEFAULT_USER_DS] = { { { 0x0000ffff, 0x00cff300 } } },
- [GDT_ENTRY_DEFAULT_USER_CS] = { { { 0x0000ffff, 0x00affb00 } } },
+ [GDT_ENTRY_KERNEL32_CS] = { { { 0x0000ffff, 0x00cf9b00 } } },
+ [GDT_ENTRY_KERNEL_CS] = { { { 0x0000ffff, 0x00af9b00 } } },
+ [GDT_ENTRY_KERNEL_DS] = { { { 0x0000ffff, 0x00cf9300 } } },
+ [GDT_ENTRY_DEFAULT_USER32_CS] = { { { 0x0000ffff, 0x00cffb00 } } },
+ [GDT_ENTRY_DEFAULT_USER_DS] = { { { 0x0000ffff, 0x00cff300 } } },
+ [GDT_ENTRY_DEFAULT_USER_CS] = { { { 0x0000ffff, 0x00affb00 } } },
#else
- [GDT_ENTRY_KERNEL_CS] = { { { 0x0000ffff, 0x00cf9a00 } } },
- [GDT_ENTRY_KERNEL_DS] = { { { 0x0000ffff, 0x00cf9200 } } },
- [GDT_ENTRY_DEFAULT_USER_CS] = { { { 0x0000ffff, 0x00cffa00 } } },
- [GDT_ENTRY_DEFAULT_USER_DS] = { { { 0x0000ffff, 0x00cff200 } } },
+ [GDT_ENTRY_KERNEL_CS] = { { { 0x0000ffff, 0x00cf9a00 } } },
+ [GDT_ENTRY_KERNEL_DS] = { { { 0x0000ffff, 0x00cf9200 } } },
+ [GDT_ENTRY_DEFAULT_USER_CS] = { { { 0x0000ffff, 0x00cffa00 } } },
+ [GDT_ENTRY_DEFAULT_USER_DS] = { { { 0x0000ffff, 0x00cff200 } } },
/*
* Segments used for calling PnP BIOS have byte granularity.
* They code segments and data segments have fixed 64k limits,
* the transfer segment sizes are set at run time.
*/
/* 32-bit code */
- [GDT_ENTRY_PNPBIOS_CS32] = { { { 0x0000ffff, 0x00409a00 } } },
+ [GDT_ENTRY_PNPBIOS_CS32] = { { { 0x0000ffff, 0x00409a00 } } },
/* 16-bit code */
- [GDT_ENTRY_PNPBIOS_CS16] = { { { 0x0000ffff, 0x00009a00 } } },
+ [GDT_ENTRY_PNPBIOS_CS16] = { { { 0x0000ffff, 0x00009a00 } } },
/* 16-bit data */
- [GDT_ENTRY_PNPBIOS_DS] = { { { 0x0000ffff, 0x00009200 } } },
+ [GDT_ENTRY_PNPBIOS_DS] = { { { 0x0000ffff, 0x00009200 } } },
/* 16-bit data */
- [GDT_ENTRY_PNPBIOS_TS1] = { { { 0x00000000, 0x00009200 } } },
+ [GDT_ENTRY_PNPBIOS_TS1] = { { { 0x00000000, 0x00009200 } } },
/* 16-bit data */
- [GDT_ENTRY_PNPBIOS_TS2] = { { { 0x00000000, 0x00009200 } } },
+ [GDT_ENTRY_PNPBIOS_TS2] = { { { 0x00000000, 0x00009200 } } },
/*
* The APM segments have byte granularity and their bases
* are set at run time. All have 64k limits.
*/
/* 32-bit code */
- [GDT_ENTRY_APMBIOS_BASE] = { { { 0x0000ffff, 0x00409a00 } } },
+ [GDT_ENTRY_APMBIOS_BASE] = { { { 0x0000ffff, 0x00409a00 } } },
/* 16-bit code */
- [GDT_ENTRY_APMBIOS_BASE+1] = { { { 0x0000ffff, 0x00009a00 } } },
+ [GDT_ENTRY_APMBIOS_BASE+1] = { { { 0x0000ffff, 0x00009a00 } } },
/* data */
- [GDT_ENTRY_APMBIOS_BASE+2] = { { { 0x0000ffff, 0x00409200 } } },
+ [GDT_ENTRY_APMBIOS_BASE+2] = { { { 0x0000ffff, 0x00409200 } } },
- [GDT_ENTRY_ESPFIX_SS] = { { { 0x00000000, 0x00c09200 } } },
- [GDT_ENTRY_PERCPU] = { { { 0x0000ffff, 0x00cf9200 } } },
+ [GDT_ENTRY_ESPFIX_SS] = { { { 0x00000000, 0x00c09200 } } },
+ [GDT_ENTRY_PERCPU] = { { { 0x0000ffff, 0x00cf9200 } } },
GDT_STACK_CANARY_INIT
#endif
} };
@@ -164,16 +152,17 @@ static inline int flag_is_changeable_p(u32 flag)
* the CPUID. Add "volatile" to not allow gcc to
* optimize the subsequent calls to this function.
*/
- asm volatile ("pushfl\n\t"
- "pushfl\n\t"
- "popl %0\n\t"
- "movl %0,%1\n\t"
- "xorl %2,%0\n\t"
- "pushl %0\n\t"
- "popfl\n\t"
- "pushfl\n\t"
- "popl %0\n\t"
- "popfl\n\t"
+ asm volatile ("pushfl \n\t"
+ "pushfl \n\t"
+ "popl %0 \n\t"
+ "movl %0, %1 \n\t"
+ "xorl %2, %0 \n\t"
+ "pushl %0 \n\t"
+ "popfl \n\t"
+ "pushfl \n\t"
+ "popl %0 \n\t"
+ "popfl \n\t"
+
: "=&r" (f1), "=&r" (f2)
: "ir" (flag));
@@ -188,18 +177,22 @@ static int __cpuinit have_cpuid_p(void)
static void __cpuinit squash_the_stupid_serial_number(struct cpuinfo_x86 *c)
{
- if (cpu_has(c, X86_FEATURE_PN) && disable_x86_serial_nr) {
- /* Disable processor serial number */
- unsigned long lo, hi;
- rdmsr(MSR_IA32_BBL_CR_CTL, lo, hi);
- lo |= 0x200000;
- wrmsr(MSR_IA32_BBL_CR_CTL, lo, hi);
- printk(KERN_NOTICE "CPU serial number disabled.\n");
- clear_cpu_cap(c, X86_FEATURE_PN);
-
- /* Disabling the serial number may affect the cpuid level */
- c->cpuid_level = cpuid_eax(0);
- }
+ unsigned long lo, hi;
+
+ if (!cpu_has(c, X86_FEATURE_PN) || !disable_x86_serial_nr)
+ return;
+
+ /* Disable processor serial number: */
+
+ rdmsr(MSR_IA32_BBL_CR_CTL, lo, hi);
+ lo |= 0x200000;
+ wrmsr(MSR_IA32_BBL_CR_CTL, lo, hi);
+
+ printk(KERN_NOTICE "CPU serial number disabled.\n");
+ clear_cpu_cap(c, X86_FEATURE_PN);
+
+ /* Disabling the serial number may affect the cpuid level */
+ c->cpuid_level = cpuid_eax(0);
}
static int __init x86_serial_nr_setup(char *s)
@@ -232,6 +225,7 @@ struct cpuid_dependent_feature {
u32 feature;
u32 level;
};
+
static const struct cpuid_dependent_feature __cpuinitconst
cpuid_dependent_features[] = {
{ X86_FEATURE_MWAIT, 0x00000005 },
@@ -243,7 +237,11 @@ cpuid_dependent_features[] = {
static void __cpuinit filter_cpuid_features(struct cpuinfo_x86 *c, bool warn)
{
const struct cpuid_dependent_feature *df;
+
for (df = cpuid_dependent_features; df->feature; df++) {
+
+ if (!cpu_has(c, df->feature))
+ continue;
/*
* Note: cpuid_level is set to -1 if unavailable, but
* extended_extended_level is set to 0 if unavailable
@@ -251,32 +249,32 @@ static void __cpuinit filter_cpuid_features(struct cpuinfo_x86 *c, bool warn)
* when signed; hence the weird messing around with
* signs here...
*/
- if (cpu_has(c, df->feature) &&
- ((s32)df->level < 0 ?
+ if (!((s32)df->level < 0 ?
(u32)df->level > (u32)c->extended_cpuid_level :
- (s32)df->level > (s32)c->cpuid_level)) {
- clear_cpu_cap(c, df->feature);
- if (warn)
- printk(KERN_WARNING
- "CPU: CPU feature %s disabled "
- "due to lack of CPUID level 0x%x\n",
- x86_cap_flags[df->feature],
- df->level);
- }
+ (s32)df->level > (s32)c->cpuid_level))
+ continue;
+
+ clear_cpu_cap(c, df->feature);
+ if (!warn)
+ continue;
+
+ printk(KERN_WARNING
+ "CPU: CPU feature %s disabled, no CPUID level 0x%x\n",
+ x86_cap_flags[df->feature], df->level);
}
}
/*
* Naming convention should be: <Name> [(<Codename>)]
* This table only is used unless init_<vendor>() below doesn't set it;
- * in particular, if CPUID levels 0x80000002..4 are supported, this isn't used
- *
+ * in particular, if CPUID levels 0x80000002..4 are supported, this
+ * isn't used
*/
/* Look up CPU names by table lookup. */
-static char __cpuinit *table_lookup_model(struct cpuinfo_x86 *c)
+static const char *__cpuinit table_lookup_model(struct cpuinfo_x86 *c)
{
- struct cpu_model_info *info;
+ const struct cpu_model_info *info;
if (c->x86_model >= 16)
return NULL; /* Range check */
@@ -307,8 +305,10 @@ void load_percpu_segment(int cpu)
load_stack_canary_segment();
}
-/* Current gdt points %fs at the "master" per-cpu area: after this,
- * it's on the real one. */
+/*
+ * Current gdt points %fs at the "master" per-cpu area: after this,
+ * it's on the real one.
+ */
void switch_to_new_gdt(int cpu)
{
struct desc_ptr gdt_descr;
@@ -321,7 +321,7 @@ void switch_to_new_gdt(int cpu)
load_percpu_segment(cpu);
}
-static struct cpu_dev *cpu_devs[X86_VENDOR_NUM] = {};
+static const struct cpu_dev *__cpuinitdata cpu_devs[X86_VENDOR_NUM] = {};
static void __cpuinit default_init(struct cpuinfo_x86 *c)
{
@@ -340,7 +340,7 @@ static void __cpuinit default_init(struct cpuinfo_x86 *c)
#endif
}
-static struct cpu_dev __cpuinitdata default_cpu = {
+static const struct cpu_dev __cpuinitconst default_cpu = {
.c_init = default_init,
.c_vendor = "Unknown",
.c_x86_vendor = X86_VENDOR_UNKNOWN,
@@ -354,22 +354,24 @@ static void __cpuinit get_model_name(struct cpuinfo_x86 *c)
if (c->extended_cpuid_level < 0x80000004)
return;
- v = (unsigned int *) c->x86_model_id;
+ v = (unsigned int *)c->x86_model_id;
cpuid(0x80000002, &v[0], &v[1], &v[2], &v[3]);
cpuid(0x80000003, &v[4], &v[5], &v[6], &v[7]);
cpuid(0x80000004, &v[8], &v[9], &v[10], &v[11]);
c->x86_model_id[48] = 0;
- /* Intel chips right-justify this string for some dumb reason;
- undo that brain damage */
+ /*
+ * Intel chips right-justify this string for some dumb reason;
+ * undo that brain damage:
+ */
p = q = &c->x86_model_id[0];
while (*p == ' ')
- p++;
+ p++;
if (p != q) {
- while (*p)
- *q++ = *p++;
- while (q <= &c->x86_model_id[48])
- *q++ = '\0'; /* Zero-pad the rest */
+ while (*p)
+ *q++ = *p++;
+ while (q <= &c->x86_model_id[48])
+ *q++ = '\0'; /* Zero-pad the rest */
}
}
@@ -438,27 +440,30 @@ void __cpuinit detect_ht(struct cpuinfo_x86 *c)
if (smp_num_siblings == 1) {
printk(KERN_INFO "CPU: Hyper-Threading is disabled\n");
- } else if (smp_num_siblings > 1) {
+ goto out;
+ }
- if (smp_num_siblings > nr_cpu_ids) {
- printk(KERN_WARNING "CPU: Unsupported number of siblings %d",
- smp_num_siblings);
- smp_num_siblings = 1;
- return;
- }
+ if (smp_num_siblings <= 1)
+ goto out;
- index_msb = get_count_order(smp_num_siblings);
- c->phys_proc_id = apic->phys_pkg_id(c->initial_apicid, index_msb);
+ if (smp_num_siblings > nr_cpu_ids) {
+ pr_warning("CPU: Unsupported number of siblings %d",
+ smp_num_siblings);
+ smp_num_siblings = 1;
+ return;
+ }
- smp_num_siblings = smp_num_siblings / c->x86_max_cores;
+ index_msb = get_count_order(smp_num_siblings);
+ c->phys_proc_id = apic->phys_pkg_id(c->initial_apicid, index_msb);
- index_msb = get_count_order(smp_num_siblings);
+ smp_num_siblings = smp_num_siblings / c->x86_max_cores;
- core_bits = get_count_order(c->x86_max_cores);
+ index_msb = get_count_order(smp_num_siblings);
- c->cpu_core_id = apic->phys_pkg_id(c->initial_apicid, index_msb) &
- ((1 << core_bits) - 1);
- }
+ core_bits = get_count_order(c->x86_max_cores);
+
+ c->cpu_core_id = apic->phys_pkg_id(c->initial_apicid, index_msb) &
+ ((1 << core_bits) - 1);
out:
if ((c->x86_max_cores * smp_num_siblings) > 1) {
@@ -473,8 +478,8 @@ out:
static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c)
{
char *v = c->x86_vendor_id;
- int i;
static int printed;
+ int i;
for (i = 0; i < X86_VENDOR_NUM; i++) {
if (!cpu_devs[i])
@@ -483,6 +488,7 @@ static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c)
if (!strcmp(v, cpu_devs[i]->c_ident[0]) ||
(cpu_devs[i]->c_ident[1] &&
!strcmp(v, cpu_devs[i]->c_ident[1]))) {
+
this_cpu = cpu_devs[i];
c->x86_vendor = this_cpu->c_x86_vendor;
return;
@@ -491,7 +497,9 @@ static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c)
if (!printed) {
printed++;
- printk(KERN_ERR "CPU: vendor_id '%s' unknown, using generic init.\n", v);
+ printk(KERN_ERR
+ "CPU: vendor_id '%s' unknown, using generic init.\n", v);
+
printk(KERN_ERR "CPU: Your system may be unstable.\n");
}
@@ -511,14 +519,17 @@ void __cpuinit cpu_detect(struct cpuinfo_x86 *c)
/* Intel-defined flags: level 0x00000001 */
if (c->cpuid_level >= 0x00000001) {
u32 junk, tfms, cap0, misc;
+
cpuid(0x00000001, &tfms, &misc, &junk, &cap0);
c->x86 = (tfms >> 8) & 0xf;
c->x86_model = (tfms >> 4) & 0xf;
c->x86_mask = tfms & 0xf;
+
if (c->x86 == 0xf)
c->x86 += (tfms >> 20) & 0xff;
if (c->x86 >= 0x6)
c->x86_model += ((tfms >> 16) & 0xf) << 4;
+
if (cap0 & (1<<19)) {
c->x86_clflush_size = ((misc >> 8) & 0xff) * 8;
c->x86_cache_alignment = c->x86_clflush_size;
@@ -534,6 +545,7 @@ static void __cpuinit get_cpu_cap(struct cpuinfo_x86 *c)
/* Intel-defined flags: level 0x00000001 */
if (c->cpuid_level >= 0x00000001) {
u32 capability, excap;
+
cpuid(0x00000001, &tfms, &ebx, &excap, &capability);
c->x86_capability[0] = capability;
c->x86_capability[4] = excap;
@@ -542,6 +554,7 @@ static void __cpuinit get_cpu_cap(struct cpuinfo_x86 *c)
/* AMD-defined flags: level 0x80000001 */
xlvl = cpuid_eax(0x80000000);
c->extended_cpuid_level = xlvl;
+
if ((xlvl & 0xffff0000) == 0x80000000) {
if (xlvl >= 0x80000001) {
c->x86_capability[1] = cpuid_edx(0x80000001);
@@ -549,13 +562,15 @@ static void __cpuinit get_cpu_cap(struct cpuinfo_x86 *c)
}
}
-#ifdef CONFIG_X86_64
if (c->extended_cpuid_level >= 0x80000008) {
u32 eax = cpuid_eax(0x80000008);
c->x86_virt_bits = (eax >> 8) & 0xff;
c->x86_phys_bits = eax & 0xff;
}
+#ifdef CONFIG_X86_32
+ else if (cpu_has(c, X86_FEATURE_PAE) || cpu_has(c, X86_FEATURE_PSE36))
+ c->x86_phys_bits = 36;
#endif
if (c->extended_cpuid_level >= 0x80000007)
@@ -602,8 +617,12 @@ static void __init early_identify_cpu(struct cpuinfo_x86 *c)
{
#ifdef CONFIG_X86_64
c->x86_clflush_size = 64;
+ c->x86_phys_bits = 36;
+ c->x86_virt_bits = 48;
#else
c->x86_clflush_size = 32;
+ c->x86_phys_bits = 32;
+ c->x86_virt_bits = 32;
#endif
c->x86_cache_alignment = c->x86_clflush_size;
@@ -634,12 +653,12 @@ static void __init early_identify_cpu(struct cpuinfo_x86 *c)
void __init early_cpu_init(void)
{
- struct cpu_dev **cdev;
+ const struct cpu_dev *const *cdev;
int count = 0;
- printk("KERNEL supported cpus:\n");
+ printk(KERN_INFO "KERNEL supported cpus:\n");
for (cdev = __x86_cpu_dev_start; cdev < __x86_cpu_dev_end; cdev++) {
- struct cpu_dev *cpudev = *cdev;
+ const struct cpu_dev *cpudev = *cdev;
unsigned int j;
if (count >= X86_VENDOR_NUM)
@@ -650,7 +669,7 @@ void __init early_cpu_init(void)
for (j = 0; j < 2; j++) {
if (!cpudev->c_ident[j])
continue;
- printk(" %s %s\n", cpudev->c_vendor,
+ printk(KERN_INFO " %s %s\n", cpudev->c_vendor,
cpudev->c_ident[j]);
}
}
@@ -726,9 +745,13 @@ static void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
c->x86_coreid_bits = 0;
#ifdef CONFIG_X86_64
c->x86_clflush_size = 64;
+ c->x86_phys_bits = 36;
+ c->x86_virt_bits = 48;
#else
c->cpuid_level = -1; /* CPUID not detected */
c->x86_clflush_size = 32;
+ c->x86_phys_bits = 32;
+ c->x86_virt_bits = 32;
#endif
c->x86_cache_alignment = c->x86_clflush_size;
memset(&c->x86_capability, 0, sizeof c->x86_capability);
@@ -759,8 +782,8 @@ static void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
squash_the_stupid_serial_number(c);
/*
- * The vendor-specific functions might have changed features. Now
- * we do "generic changes."
+ * The vendor-specific functions might have changed features.
+ * Now we do "generic changes."
*/
/* Filter out anything that depends on CPUID levels we don't have */
@@ -768,7 +791,7 @@ static void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
/* If the model name is still unset, do table lookup. */
if (!c->x86_model_id[0]) {
- char *p;
+ const char *p;
p = table_lookup_model(c);
if (p)
strcpy(c->x86_model_id, p);
@@ -824,6 +847,7 @@ static void vgetcpu_set_mode(void)
void __init identify_boot_cpu(void)
{
identify_cpu(&boot_cpu_data);
+ init_c1e_mask();
#ifdef CONFIG_X86_32
sysenter_setup();
enable_sep_cpu();
@@ -843,11 +867,11 @@ void __cpuinit identify_secondary_cpu(struct cpuinfo_x86 *c)
}
struct msr_range {
- unsigned min;
- unsigned max;
+ unsigned min;
+ unsigned max;
};
-static struct msr_range msr_range_array[] __cpuinitdata = {
+static const struct msr_range msr_range_array[] __cpuinitconst = {
{ 0x00000000, 0x00000418},
{ 0xc0000000, 0xc000040b},
{ 0xc0010000, 0xc0010142},
@@ -856,14 +880,15 @@ static struct msr_range msr_range_array[] __cpuinitdata = {
static void __cpuinit print_cpu_msr(void)
{
+ unsigned index_min, index_max;
unsigned index;
u64 val;
int i;
- unsigned index_min, index_max;
for (i = 0; i < ARRAY_SIZE(msr_range_array); i++) {
index_min = msr_range_array[i].min;
index_max = msr_range_array[i].max;
+
for (index = index_min; index < index_max; index++) {
if (rdmsrl_amd_safe(index, &val))
continue;
@@ -873,6 +898,7 @@ static void __cpuinit print_cpu_msr(void)
}
static int show_msr __cpuinitdata;
+
static __init int setup_show_msr(char *arg)
{
int num;
@@ -894,12 +920,14 @@ __setup("noclflush", setup_noclflush);
void __cpuinit print_cpu_info(struct cpuinfo_x86 *c)
{
- char *vendor = NULL;
+ const char *vendor = NULL;
- if (c->x86_vendor < X86_VENDOR_NUM)
+ if (c->x86_vendor < X86_VENDOR_NUM) {
vendor = this_cpu->c_vendor;
- else if (c->cpuid_level >= 0)
- vendor = c->x86_vendor_id;
+ } else {
+ if (c->cpuid_level >= 0)
+ vendor = c->x86_vendor_id;
+ }
if (vendor && !strstr(c->x86_model_id, vendor))
printk(KERN_CONT "%s ", vendor);
@@ -926,10 +954,12 @@ void __cpuinit print_cpu_info(struct cpuinfo_x86 *c)
static __init int setup_disablecpuid(char *arg)
{
int bit;
+
if (get_option(&arg, &bit) && bit < NCAPINTS*32)
setup_clear_cpu_cap(bit);
else
return 0;
+
return 1;
}
__setup("clearcpuid=", setup_disablecpuid);
@@ -939,6 +969,7 @@ struct desc_ptr idt_descr = { 256 * 16 - 1, (unsigned long) idt_table };
DEFINE_PER_CPU_FIRST(union irq_stack_union,
irq_stack_union) __aligned(PAGE_SIZE);
+
DEFINE_PER_CPU(char *, irq_stack_ptr) =
init_per_cpu_var(irq_stack_union.irq_stack) + IRQ_STACK_SIZE - 64;
@@ -948,12 +979,21 @@ EXPORT_PER_CPU_SYMBOL(kernel_stack);
DEFINE_PER_CPU(unsigned int, irq_count) = -1;
+/*
+ * Special IST stacks which the CPU switches to when it calls
+ * an IST-marked descriptor entry. Up to 7 stacks (hardware
+ * limit), all of them are 4K, except the debug stack which
+ * is 8K.
+ */
+static const unsigned int exception_stack_sizes[N_EXCEPTION_STACKS] = {
+ [0 ... N_EXCEPTION_STACKS - 1] = EXCEPTION_STKSZ,
+ [DEBUG_STACK - 1] = DEBUG_STKSZ
+};
+
static DEFINE_PER_CPU_PAGE_ALIGNED(char, exception_stacks
[(N_EXCEPTION_STACKS - 1) * EXCEPTION_STKSZ + DEBUG_STKSZ])
__aligned(PAGE_SIZE);
-extern asmlinkage void ignore_sysret(void);
-
/* May not be marked __init: used by software suspend */
void syscall_init(void)
{
@@ -983,7 +1023,7 @@ unsigned long kernel_eflags;
*/
DEFINE_PER_CPU(struct orig_ist, orig_ist);
-#else /* x86_64 */
+#else /* CONFIG_X86_64 */
#ifdef CONFIG_CC_STACKPROTECTOR
DEFINE_PER_CPU(unsigned long, stack_canary);
@@ -995,9 +1035,26 @@ struct pt_regs * __cpuinit idle_regs(struct pt_regs *regs)
memset(regs, 0, sizeof(struct pt_regs));
regs->fs = __KERNEL_PERCPU;
regs->gs = __KERNEL_STACK_CANARY;
+
return regs;
}
-#endif /* x86_64 */
+#endif /* CONFIG_X86_64 */
+
+/*
+ * Clear all 6 debug registers:
+ */
+static void clear_all_debug_regs(void)
+{
+ int i;
+
+ for (i = 0; i < 8; i++) {
+ /* Ignore db4, db5 */
+ if ((i == 4) || (i == 5))
+ continue;
+
+ set_debugreg(0, i);
+ }
+}
/*
* cpu_init() initializes state that is per-CPU. Some data is already
@@ -1007,15 +1064,20 @@ struct pt_regs * __cpuinit idle_regs(struct pt_regs *regs)
* A lot of state is already set up in PDA init for 64 bit
*/
#ifdef CONFIG_X86_64
+
void __cpuinit cpu_init(void)
{
- int cpu = stack_smp_processor_id();
- struct tss_struct *t = &per_cpu(init_tss, cpu);
- struct orig_ist *orig_ist = &per_cpu(orig_ist, cpu);
- unsigned long v;
+ struct orig_ist *orig_ist;
struct task_struct *me;
+ struct tss_struct *t;
+ unsigned long v;
+ int cpu;
int i;
+ cpu = stack_smp_processor_id();
+ t = &per_cpu(init_tss, cpu);
+ orig_ist = &per_cpu(orig_ist, cpu);
+
#ifdef CONFIG_NUMA
if (cpu != 0 && percpu_read(node_number) == 0 &&
cpu_to_node(cpu) != NUMA_NO_NODE)
@@ -1056,19 +1118,17 @@ void __cpuinit cpu_init(void)
* set up and load the per-CPU TSS
*/
if (!orig_ist->ist[0]) {
- static const unsigned int sizes[N_EXCEPTION_STACKS] = {
- [0 ... N_EXCEPTION_STACKS - 1] = EXCEPTION_STKSZ,
- [DEBUG_STACK - 1] = DEBUG_STKSZ
- };
char *estacks = per_cpu(exception_stacks, cpu);
+
for (v = 0; v < N_EXCEPTION_STACKS; v++) {
- estacks += sizes[v];
+ estacks += exception_stack_sizes[v];
orig_ist->ist[v] = t->x86_tss.ist[v] =
(unsigned long)estacks;
}
}
t->x86_tss.io_bitmap_base = offsetof(struct tss_struct, io_bitmap);
+
/*
* <= is required because the CPU will access up to
* 8 bits beyond the end of the IO permission bitmap.
@@ -1078,8 +1138,7 @@ void __cpuinit cpu_init(void)
atomic_inc(&init_mm.mm_count);
me->active_mm = &init_mm;
- if (me->mm)
- BUG();
+ BUG_ON(me->mm);
enter_lazy_tlb(&init_mm, me);
load_sp0(t, &current->thread);
@@ -1098,17 +1157,7 @@ void __cpuinit cpu_init(void)
arch_kgdb_ops.correct_hw_break();
else
#endif
- {
- /*
- * Clear all 6 debug registers:
- */
- set_debugreg(0UL, 0);
- set_debugreg(0UL, 1);
- set_debugreg(0UL, 2);
- set_debugreg(0UL, 3);
- set_debugreg(0UL, 6);
- set_debugreg(0UL, 7);
- }
+ clear_all_debug_regs();
fpu_init();
@@ -1129,7 +1178,8 @@ void __cpuinit cpu_init(void)
if (cpumask_test_and_set_cpu(cpu, cpu_initialized_mask)) {
printk(KERN_WARNING "CPU#%d already initialized!\n", cpu);
- for (;;) local_irq_enable();
+ for (;;)
+ local_irq_enable();
}
printk(KERN_INFO "Initializing CPU#%d\n", cpu);
@@ -1145,8 +1195,7 @@ void __cpuinit cpu_init(void)
*/
atomic_inc(&init_mm.mm_count);
curr->active_mm = &init_mm;
- if (curr->mm)
- BUG();
+ BUG_ON(curr->mm);
enter_lazy_tlb(&init_mm, curr);
load_sp0(t, thread);
@@ -1159,13 +1208,7 @@ void __cpuinit cpu_init(void)
__set_tss_desc(cpu, GDT_ENTRY_DOUBLEFAULT_TSS, &doublefault_tss);
#endif
- /* Clear all 6 debug registers: */
- set_debugreg(0, 0);
- set_debugreg(0, 1);
- set_debugreg(0, 2);
- set_debugreg(0, 3);
- set_debugreg(0, 6);
- set_debugreg(0, 7);
+ clear_all_debug_regs();
/*
* Force FPU initialization:
@@ -1185,6 +1228,4 @@ void __cpuinit cpu_init(void)
xsave_init();
}
-
-
#endif
diff --git a/arch/x86/kernel/cpu/cpu.h b/arch/x86/kernel/cpu/cpu.h
index de4094a39210..6de9a908e400 100644
--- a/arch/x86/kernel/cpu/cpu.h
+++ b/arch/x86/kernel/cpu/cpu.h
@@ -3,33 +3,34 @@
#define ARCH_X86_CPU_H
struct cpu_model_info {
- int vendor;
- int family;
- char *model_names[16];
+ int vendor;
+ int family;
+ const char *model_names[16];
};
/* attempt to consolidate cpu attributes */
struct cpu_dev {
- char * c_vendor;
+ const char *c_vendor;
/* some have two possibilities for cpuid string */
- char * c_ident[2];
+ const char *c_ident[2];
struct cpu_model_info c_models[4];
- void (*c_early_init)(struct cpuinfo_x86 *c);
- void (*c_init)(struct cpuinfo_x86 * c);
- void (*c_identify)(struct cpuinfo_x86 * c);
- unsigned int (*c_size_cache)(struct cpuinfo_x86 * c, unsigned int size);
- int c_x86_vendor;
+ void (*c_early_init)(struct cpuinfo_x86 *);
+ void (*c_init)(struct cpuinfo_x86 *);
+ void (*c_identify)(struct cpuinfo_x86 *);
+ unsigned int (*c_size_cache)(struct cpuinfo_x86 *, unsigned int);
+ int c_x86_vendor;
};
#define cpu_dev_register(cpu_devX) \
- static struct cpu_dev *__cpu_dev_##cpu_devX __used \
+ static const struct cpu_dev *const __cpu_dev_##cpu_devX __used \
__attribute__((__section__(".x86_cpu_dev.init"))) = \
&cpu_devX;
-extern struct cpu_dev *__x86_cpu_dev_start[], *__x86_cpu_dev_end[];
+extern const struct cpu_dev *const __x86_cpu_dev_start[],
+ *const __x86_cpu_dev_end[];
extern void display_cacheinfo(struct cpuinfo_x86 *c);
diff --git a/arch/x86/kernel/cpu/cpu_debug.c b/arch/x86/kernel/cpu/cpu_debug.c
new file mode 100755
index 000000000000..46e29ab96c6a
--- /dev/null
+++ b/arch/x86/kernel/cpu/cpu_debug.c
@@ -0,0 +1,901 @@
+/*
+ * CPU x86 architecture debug code
+ *
+ * Copyright(C) 2009 Jaswinder Singh Rajput
+ *
+ * For licencing details see kernel-base/COPYING
+ */
+
+#include <linux/interrupt.h>
+#include <linux/compiler.h>
+#include <linux/seq_file.h>
+#include <linux/debugfs.h>
+#include <linux/kprobes.h>
+#include <linux/uaccess.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/percpu.h>
+#include <linux/signal.h>
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/smp.h>
+
+#include <asm/cpu_debug.h>
+#include <asm/paravirt.h>
+#include <asm/system.h>
+#include <asm/traps.h>
+#include <asm/apic.h>
+#include <asm/desc.h>
+
+static DEFINE_PER_CPU(struct cpu_cpuX_base, cpu_arr[CPU_REG_ALL_BIT]);
+static DEFINE_PER_CPU(struct cpu_private *, priv_arr[MAX_CPU_FILES]);
+static DEFINE_PER_CPU(unsigned, cpu_modelflag);
+static DEFINE_PER_CPU(int, cpu_priv_count);
+static DEFINE_PER_CPU(unsigned, cpu_model);
+
+static DEFINE_MUTEX(cpu_debug_lock);
+
+static struct dentry *cpu_debugfs_dir;
+
+static struct cpu_debug_base cpu_base[] = {
+ { "mc", CPU_MC, 0 },
+ { "monitor", CPU_MONITOR, 0 },
+ { "time", CPU_TIME, 0 },
+ { "pmc", CPU_PMC, 1 },
+ { "platform", CPU_PLATFORM, 0 },
+ { "apic", CPU_APIC, 0 },
+ { "poweron", CPU_POWERON, 0 },
+ { "control", CPU_CONTROL, 0 },
+ { "features", CPU_FEATURES, 0 },
+ { "lastbranch", CPU_LBRANCH, 0 },
+ { "bios", CPU_BIOS, 0 },
+ { "freq", CPU_FREQ, 0 },
+ { "mtrr", CPU_MTRR, 0 },
+ { "perf", CPU_PERF, 0 },
+ { "cache", CPU_CACHE, 0 },
+ { "sysenter", CPU_SYSENTER, 0 },
+ { "therm", CPU_THERM, 0 },
+ { "misc", CPU_MISC, 0 },
+ { "debug", CPU_DEBUG, 0 },
+ { "pat", CPU_PAT, 0 },
+ { "vmx", CPU_VMX, 0 },
+ { "call", CPU_CALL, 0 },
+ { "base", CPU_BASE, 0 },
+ { "ver", CPU_VER, 0 },
+ { "conf", CPU_CONF, 0 },
+ { "smm", CPU_SMM, 0 },
+ { "svm", CPU_SVM, 0 },
+ { "osvm", CPU_OSVM, 0 },
+ { "tss", CPU_TSS, 0 },
+ { "cr", CPU_CR, 0 },
+ { "dt", CPU_DT, 0 },
+ { "registers", CPU_REG_ALL, 0 },
+};
+
+static struct cpu_file_base cpu_file[] = {
+ { "index", CPU_REG_ALL, 0 },
+ { "value", CPU_REG_ALL, 1 },
+};
+
+/* Intel Registers Range */
+static struct cpu_debug_range cpu_intel_range[] = {
+ { 0x00000000, 0x00000001, CPU_MC, CPU_INTEL_ALL },
+ { 0x00000006, 0x00000007, CPU_MONITOR, CPU_CX_AT_XE },
+ { 0x00000010, 0x00000010, CPU_TIME, CPU_INTEL_ALL },
+ { 0x00000011, 0x00000013, CPU_PMC, CPU_INTEL_PENTIUM },
+ { 0x00000017, 0x00000017, CPU_PLATFORM, CPU_PX_CX_AT_XE },
+ { 0x0000001B, 0x0000001B, CPU_APIC, CPU_P6_CX_AT_XE },
+
+ { 0x0000002A, 0x0000002A, CPU_POWERON, CPU_PX_CX_AT_XE },
+ { 0x0000002B, 0x0000002B, CPU_POWERON, CPU_INTEL_XEON },
+ { 0x0000002C, 0x0000002C, CPU_FREQ, CPU_INTEL_XEON },
+ { 0x0000003A, 0x0000003A, CPU_CONTROL, CPU_CX_AT_XE },
+
+ { 0x00000040, 0x00000043, CPU_LBRANCH, CPU_PM_CX_AT_XE },
+ { 0x00000044, 0x00000047, CPU_LBRANCH, CPU_PM_CO_AT },
+ { 0x00000060, 0x00000063, CPU_LBRANCH, CPU_C2_AT },
+ { 0x00000064, 0x00000067, CPU_LBRANCH, CPU_INTEL_ATOM },
+
+ { 0x00000079, 0x00000079, CPU_BIOS, CPU_P6_CX_AT_XE },
+ { 0x00000088, 0x0000008A, CPU_CACHE, CPU_INTEL_P6 },
+ { 0x0000008B, 0x0000008B, CPU_BIOS, CPU_P6_CX_AT_XE },
+ { 0x0000009B, 0x0000009B, CPU_MONITOR, CPU_INTEL_XEON },
+
+ { 0x000000C1, 0x000000C2, CPU_PMC, CPU_P6_CX_AT },
+ { 0x000000CD, 0x000000CD, CPU_FREQ, CPU_CX_AT },
+ { 0x000000E7, 0x000000E8, CPU_PERF, CPU_CX_AT },
+ { 0x000000FE, 0x000000FE, CPU_MTRR, CPU_P6_CX_XE },
+
+ { 0x00000116, 0x00000116, CPU_CACHE, CPU_INTEL_P6 },
+ { 0x00000118, 0x00000118, CPU_CACHE, CPU_INTEL_P6 },
+ { 0x00000119, 0x00000119, CPU_CACHE, CPU_INTEL_PX },
+ { 0x0000011A, 0x0000011B, CPU_CACHE, CPU_INTEL_P6 },
+ { 0x0000011E, 0x0000011E, CPU_CACHE, CPU_PX_CX_AT },
+
+ { 0x00000174, 0x00000176, CPU_SYSENTER, CPU_P6_CX_AT_XE },
+ { 0x00000179, 0x0000017A, CPU_MC, CPU_PX_CX_AT_XE },
+ { 0x0000017B, 0x0000017B, CPU_MC, CPU_P6_XE },
+ { 0x00000186, 0x00000187, CPU_PMC, CPU_P6_CX_AT },
+ { 0x00000198, 0x00000199, CPU_PERF, CPU_PM_CX_AT_XE },
+ { 0x0000019A, 0x0000019A, CPU_TIME, CPU_PM_CX_AT_XE },
+ { 0x0000019B, 0x0000019D, CPU_THERM, CPU_PM_CX_AT_XE },
+ { 0x000001A0, 0x000001A0, CPU_MISC, CPU_PM_CX_AT_XE },
+
+ { 0x000001C9, 0x000001C9, CPU_LBRANCH, CPU_PM_CX_AT },
+ { 0x000001D7, 0x000001D8, CPU_LBRANCH, CPU_INTEL_XEON },
+ { 0x000001D9, 0x000001D9, CPU_DEBUG, CPU_CX_AT_XE },
+ { 0x000001DA, 0x000001DA, CPU_LBRANCH, CPU_INTEL_XEON },
+ { 0x000001DB, 0x000001DB, CPU_LBRANCH, CPU_P6_XE },
+ { 0x000001DC, 0x000001DC, CPU_LBRANCH, CPU_INTEL_P6 },
+ { 0x000001DD, 0x000001DE, CPU_LBRANCH, CPU_PX_CX_AT_XE },
+ { 0x000001E0, 0x000001E0, CPU_LBRANCH, CPU_INTEL_P6 },
+
+ { 0x00000200, 0x0000020F, CPU_MTRR, CPU_P6_CX_XE },
+ { 0x00000250, 0x00000250, CPU_MTRR, CPU_P6_CX_XE },
+ { 0x00000258, 0x00000259, CPU_MTRR, CPU_P6_CX_XE },
+ { 0x00000268, 0x0000026F, CPU_MTRR, CPU_P6_CX_XE },
+ { 0x00000277, 0x00000277, CPU_PAT, CPU_C2_AT_XE },
+ { 0x000002FF, 0x000002FF, CPU_MTRR, CPU_P6_CX_XE },
+
+ { 0x00000300, 0x00000308, CPU_PMC, CPU_INTEL_XEON },
+ { 0x00000309, 0x0000030B, CPU_PMC, CPU_C2_AT_XE },
+ { 0x0000030C, 0x00000311, CPU_PMC, CPU_INTEL_XEON },
+ { 0x00000345, 0x00000345, CPU_PMC, CPU_C2_AT },
+ { 0x00000360, 0x00000371, CPU_PMC, CPU_INTEL_XEON },
+ { 0x0000038D, 0x00000390, CPU_PMC, CPU_C2_AT },
+ { 0x000003A0, 0x000003BE, CPU_PMC, CPU_INTEL_XEON },
+ { 0x000003C0, 0x000003CD, CPU_PMC, CPU_INTEL_XEON },
+ { 0x000003E0, 0x000003E1, CPU_PMC, CPU_INTEL_XEON },
+ { 0x000003F0, 0x000003F0, CPU_PMC, CPU_INTEL_XEON },
+ { 0x000003F1, 0x000003F1, CPU_PMC, CPU_C2_AT_XE },
+ { 0x000003F2, 0x000003F2, CPU_PMC, CPU_INTEL_XEON },
+
+ { 0x00000400, 0x00000402, CPU_MC, CPU_PM_CX_AT_XE },
+ { 0x00000403, 0x00000403, CPU_MC, CPU_INTEL_XEON },
+ { 0x00000404, 0x00000406, CPU_MC, CPU_PM_CX_AT_XE },
+ { 0x00000407, 0x00000407, CPU_MC, CPU_INTEL_XEON },
+ { 0x00000408, 0x0000040A, CPU_MC, CPU_PM_CX_AT_XE },
+ { 0x0000040B, 0x0000040B, CPU_MC, CPU_INTEL_XEON },
+ { 0x0000040C, 0x0000040E, CPU_MC, CPU_PM_CX_XE },
+ { 0x0000040F, 0x0000040F, CPU_MC, CPU_INTEL_XEON },
+ { 0x00000410, 0x00000412, CPU_MC, CPU_PM_CX_AT_XE },
+ { 0x00000413, 0x00000417, CPU_MC, CPU_CX_AT_XE },
+ { 0x00000480, 0x0000048B, CPU_VMX, CPU_CX_AT_XE },
+
+ { 0x00000600, 0x00000600, CPU_DEBUG, CPU_PM_CX_AT_XE },
+ { 0x00000680, 0x0000068F, CPU_LBRANCH, CPU_INTEL_XEON },
+ { 0x000006C0, 0x000006CF, CPU_LBRANCH, CPU_INTEL_XEON },
+
+ { 0x000107CC, 0x000107D3, CPU_PMC, CPU_INTEL_XEON_MP },
+
+ { 0xC0000080, 0xC0000080, CPU_FEATURES, CPU_INTEL_XEON },
+ { 0xC0000081, 0xC0000082, CPU_CALL, CPU_INTEL_XEON },
+ { 0xC0000084, 0xC0000084, CPU_CALL, CPU_INTEL_XEON },
+ { 0xC0000100, 0xC0000102, CPU_BASE, CPU_INTEL_XEON },
+};
+
+/* AMD Registers Range */
+static struct cpu_debug_range cpu_amd_range[] = {
+ { 0x00000000, 0x00000001, CPU_MC, CPU_K10_PLUS, },
+ { 0x00000010, 0x00000010, CPU_TIME, CPU_K8_PLUS, },
+ { 0x0000001B, 0x0000001B, CPU_APIC, CPU_K8_PLUS, },
+ { 0x0000002A, 0x0000002A, CPU_POWERON, CPU_K7_PLUS },
+ { 0x0000008B, 0x0000008B, CPU_VER, CPU_K8_PLUS },
+ { 0x000000FE, 0x000000FE, CPU_MTRR, CPU_K8_PLUS, },
+
+ { 0x00000174, 0x00000176, CPU_SYSENTER, CPU_K8_PLUS, },
+ { 0x00000179, 0x0000017B, CPU_MC, CPU_K8_PLUS, },
+ { 0x000001D9, 0x000001D9, CPU_DEBUG, CPU_K8_PLUS, },
+ { 0x000001DB, 0x000001DE, CPU_LBRANCH, CPU_K8_PLUS, },
+
+ { 0x00000200, 0x0000020F, CPU_MTRR, CPU_K8_PLUS, },
+ { 0x00000250, 0x00000250, CPU_MTRR, CPU_K8_PLUS, },
+ { 0x00000258, 0x00000259, CPU_MTRR, CPU_K8_PLUS, },
+ { 0x00000268, 0x0000026F, CPU_MTRR, CPU_K8_PLUS, },
+ { 0x00000277, 0x00000277, CPU_PAT, CPU_K8_PLUS, },
+ { 0x000002FF, 0x000002FF, CPU_MTRR, CPU_K8_PLUS, },
+
+ { 0x00000400, 0x00000413, CPU_MC, CPU_K8_PLUS, },
+
+ { 0xC0000080, 0xC0000080, CPU_FEATURES, CPU_AMD_ALL, },
+ { 0xC0000081, 0xC0000084, CPU_CALL, CPU_K8_PLUS, },
+ { 0xC0000100, 0xC0000102, CPU_BASE, CPU_K8_PLUS, },
+ { 0xC0000103, 0xC0000103, CPU_TIME, CPU_K10_PLUS, },
+
+ { 0xC0010000, 0xC0010007, CPU_PMC, CPU_K8_PLUS, },
+ { 0xC0010010, 0xC0010010, CPU_CONF, CPU_K7_PLUS, },
+ { 0xC0010015, 0xC0010015, CPU_CONF, CPU_K7_PLUS, },
+ { 0xC0010016, 0xC001001A, CPU_MTRR, CPU_K8_PLUS, },
+ { 0xC001001D, 0xC001001D, CPU_MTRR, CPU_K8_PLUS, },
+ { 0xC001001F, 0xC001001F, CPU_CONF, CPU_K8_PLUS, },
+ { 0xC0010030, 0xC0010035, CPU_BIOS, CPU_K8_PLUS, },
+ { 0xC0010044, 0xC0010048, CPU_MC, CPU_K8_PLUS, },
+ { 0xC0010050, 0xC0010056, CPU_SMM, CPU_K0F_PLUS, },
+ { 0xC0010058, 0xC0010058, CPU_CONF, CPU_K10_PLUS, },
+ { 0xC0010060, 0xC0010060, CPU_CACHE, CPU_AMD_11, },
+ { 0xC0010061, 0xC0010068, CPU_SMM, CPU_K10_PLUS, },
+ { 0xC0010069, 0xC001006B, CPU_SMM, CPU_AMD_11, },
+ { 0xC0010070, 0xC0010071, CPU_SMM, CPU_K10_PLUS, },
+ { 0xC0010111, 0xC0010113, CPU_SMM, CPU_K8_PLUS, },
+ { 0xC0010114, 0xC0010118, CPU_SVM, CPU_K10_PLUS, },
+ { 0xC0010140, 0xC0010141, CPU_OSVM, CPU_K10_PLUS, },
+ { 0xC0011022, 0xC0011023, CPU_CONF, CPU_K10_PLUS, },
+};
+
+
+/* Intel */
+static int get_intel_modelflag(unsigned model)
+{
+ int flag;
+
+ switch (model) {
+ case 0x0501:
+ case 0x0502:
+ case 0x0504:
+ flag = CPU_INTEL_PENTIUM;
+ break;
+ case 0x0601:
+ case 0x0603:
+ case 0x0605:
+ case 0x0607:
+ case 0x0608:
+ case 0x060A:
+ case 0x060B:
+ flag = CPU_INTEL_P6;
+ break;
+ case 0x0609:
+ case 0x060D:
+ flag = CPU_INTEL_PENTIUM_M;
+ break;
+ case 0x060E:
+ flag = CPU_INTEL_CORE;
+ break;
+ case 0x060F:
+ case 0x0617:
+ flag = CPU_INTEL_CORE2;
+ break;
+ case 0x061C:
+ flag = CPU_INTEL_ATOM;
+ break;
+ case 0x0F00:
+ case 0x0F01:
+ case 0x0F02:
+ case 0x0F03:
+ case 0x0F04:
+ flag = CPU_INTEL_XEON_P4;
+ break;
+ case 0x0F06:
+ flag = CPU_INTEL_XEON_MP;
+ break;
+ default:
+ flag = CPU_NONE;
+ break;
+ }
+
+ return flag;
+}
+
+/* AMD */
+static int get_amd_modelflag(unsigned model)
+{
+ int flag;
+
+ switch (model >> 8) {
+ case 0x6:
+ flag = CPU_AMD_K6;
+ break;
+ case 0x7:
+ flag = CPU_AMD_K7;
+ break;
+ case 0x8:
+ flag = CPU_AMD_K8;
+ break;
+ case 0xf:
+ flag = CPU_AMD_0F;
+ break;
+ case 0x10:
+ flag = CPU_AMD_10;
+ break;
+ case 0x11:
+ flag = CPU_AMD_11;
+ break;
+ default:
+ flag = CPU_NONE;
+ break;
+ }
+
+ return flag;
+}
+
+static int get_cpu_modelflag(unsigned cpu)
+{
+ int flag;
+
+ flag = per_cpu(cpu_model, cpu);
+
+ switch (flag >> 16) {
+ case X86_VENDOR_INTEL:
+ flag = get_intel_modelflag(flag);
+ break;
+ case X86_VENDOR_AMD:
+ flag = get_amd_modelflag(flag & 0xffff);
+ break;
+ default:
+ flag = CPU_NONE;
+ break;
+ }
+
+ return flag;
+}
+
+static int get_cpu_range_count(unsigned cpu)
+{
+ int index;
+
+ switch (per_cpu(cpu_model, cpu) >> 16) {
+ case X86_VENDOR_INTEL:
+ index = ARRAY_SIZE(cpu_intel_range);
+ break;
+ case X86_VENDOR_AMD:
+ index = ARRAY_SIZE(cpu_amd_range);
+ break;
+ default:
+ index = 0;
+ break;
+ }
+
+ return index;
+}
+
+static int is_typeflag_valid(unsigned cpu, unsigned flag)
+{
+ unsigned vendor, modelflag;
+ int i, index;
+
+ /* Standard Registers should be always valid */
+ if (flag >= CPU_TSS)
+ return 1;
+
+ modelflag = per_cpu(cpu_modelflag, cpu);
+ vendor = per_cpu(cpu_model, cpu) >> 16;
+ index = get_cpu_range_count(cpu);
+
+ for (i = 0; i < index; i++) {
+ switch (vendor) {
+ case X86_VENDOR_INTEL:
+ if ((cpu_intel_range[i].model & modelflag) &&
+ (cpu_intel_range[i].flag & flag))
+ return 1;
+ break;
+ case X86_VENDOR_AMD:
+ if ((cpu_amd_range[i].model & modelflag) &&
+ (cpu_amd_range[i].flag & flag))
+ return 1;
+ break;
+ }
+ }
+
+ /* Invalid */
+ return 0;
+}
+
+static unsigned get_cpu_range(unsigned cpu, unsigned *min, unsigned *max,
+ int index, unsigned flag)
+{
+ unsigned modelflag;
+
+ modelflag = per_cpu(cpu_modelflag, cpu);
+ *max = 0;
+ switch (per_cpu(cpu_model, cpu) >> 16) {
+ case X86_VENDOR_INTEL:
+ if ((cpu_intel_range[index].model & modelflag) &&
+ (cpu_intel_range[index].flag & flag)) {
+ *min = cpu_intel_range[index].min;
+ *max = cpu_intel_range[index].max;
+ }
+ break;
+ case X86_VENDOR_AMD:
+ if ((cpu_amd_range[index].model & modelflag) &&
+ (cpu_amd_range[index].flag & flag)) {
+ *min = cpu_amd_range[index].min;
+ *max = cpu_amd_range[index].max;
+ }
+ break;
+ }
+
+ return *max;
+}
+
+/* This function can also be called with seq = NULL for printk */
+static void print_cpu_data(struct seq_file *seq, unsigned type,
+ u32 low, u32 high)
+{
+ struct cpu_private *priv;
+ u64 val = high;
+
+ if (seq) {
+ priv = seq->private;
+ if (priv->file) {
+ val = (val << 32) | low;
+ seq_printf(seq, "0x%llx\n", val);
+ } else
+ seq_printf(seq, " %08x: %08x_%08x\n",
+ type, high, low);
+ } else
+ printk(KERN_INFO " %08x: %08x_%08x\n", type, high, low);
+}
+
+/* This function can also be called with seq = NULL for printk */
+static void print_msr(struct seq_file *seq, unsigned cpu, unsigned flag)
+{
+ unsigned msr, msr_min, msr_max;
+ struct cpu_private *priv;
+ u32 low, high;
+ int i, range;
+
+ if (seq) {
+ priv = seq->private;
+ if (priv->file) {
+ if (!rdmsr_safe_on_cpu(priv->cpu, priv->reg,
+ &low, &high))
+ print_cpu_data(seq, priv->reg, low, high);
+ return;
+ }
+ }
+
+ range = get_cpu_range_count(cpu);
+
+ for (i = 0; i < range; i++) {
+ if (!get_cpu_range(cpu, &msr_min, &msr_max, i, flag))
+ continue;
+
+ for (msr = msr_min; msr <= msr_max; msr++) {
+ if (rdmsr_safe_on_cpu(cpu, msr, &low, &high))
+ continue;
+ print_cpu_data(seq, msr, low, high);
+ }
+ }
+}
+
+static void print_tss(void *arg)
+{
+ struct pt_regs *regs = task_pt_regs(current);
+ struct seq_file *seq = arg;
+ unsigned int seg;
+
+ seq_printf(seq, " RAX\t: %016lx\n", regs->ax);
+ seq_printf(seq, " RBX\t: %016lx\n", regs->bx);
+ seq_printf(seq, " RCX\t: %016lx\n", regs->cx);
+ seq_printf(seq, " RDX\t: %016lx\n", regs->dx);
+
+ seq_printf(seq, " RSI\t: %016lx\n", regs->si);
+ seq_printf(seq, " RDI\t: %016lx\n", regs->di);
+ seq_printf(seq, " RBP\t: %016lx\n", regs->bp);
+ seq_printf(seq, " ESP\t: %016lx\n", regs->sp);
+
+#ifdef CONFIG_X86_64
+ seq_printf(seq, " R08\t: %016lx\n", regs->r8);
+ seq_printf(seq, " R09\t: %016lx\n", regs->r9);
+ seq_printf(seq, " R10\t: %016lx\n", regs->r10);
+ seq_printf(seq, " R11\t: %016lx\n", regs->r11);
+ seq_printf(seq, " R12\t: %016lx\n", regs->r12);
+ seq_printf(seq, " R13\t: %016lx\n", regs->r13);
+ seq_printf(seq, " R14\t: %016lx\n", regs->r14);
+ seq_printf(seq, " R15\t: %016lx\n", regs->r15);
+#endif
+
+ asm("movl %%cs,%0" : "=r" (seg));
+ seq_printf(seq, " CS\t: %04x\n", seg);
+ asm("movl %%ds,%0" : "=r" (seg));
+ seq_printf(seq, " DS\t: %04x\n", seg);
+ seq_printf(seq, " SS\t: %04lx\n", regs->ss & 0xffff);
+ asm("movl %%es,%0" : "=r" (seg));
+ seq_printf(seq, " ES\t: %04x\n", seg);
+ asm("movl %%fs,%0" : "=r" (seg));
+ seq_printf(seq, " FS\t: %04x\n", seg);
+ asm("movl %%gs,%0" : "=r" (seg));
+ seq_printf(seq, " GS\t: %04x\n", seg);
+
+ seq_printf(seq, " EFLAGS\t: %016lx\n", regs->flags);
+
+ seq_printf(seq, " EIP\t: %016lx\n", regs->ip);
+}
+
+static void print_cr(void *arg)
+{
+ struct seq_file *seq = arg;
+
+ seq_printf(seq, " cr0\t: %016lx\n", read_cr0());
+ seq_printf(seq, " cr2\t: %016lx\n", read_cr2());
+ seq_printf(seq, " cr3\t: %016lx\n", read_cr3());
+ seq_printf(seq, " cr4\t: %016lx\n", read_cr4_safe());
+#ifdef CONFIG_X86_64
+ seq_printf(seq, " cr8\t: %016lx\n", read_cr8());
+#endif
+}
+
+static void print_desc_ptr(char *str, struct seq_file *seq, struct desc_ptr dt)
+{
+ seq_printf(seq, " %s\t: %016llx\n", str, (u64)(dt.address | dt.size));
+}
+
+static void print_dt(void *seq)
+{
+ struct desc_ptr dt;
+ unsigned long ldt;
+
+ /* IDT */
+ store_idt((struct desc_ptr *)&dt);
+ print_desc_ptr("IDT", seq, dt);
+
+ /* GDT */
+ store_gdt((struct desc_ptr *)&dt);
+ print_desc_ptr("GDT", seq, dt);
+
+ /* LDT */
+ store_ldt(ldt);
+ seq_printf(seq, " LDT\t: %016lx\n", ldt);
+
+ /* TR */
+ store_tr(ldt);
+ seq_printf(seq, " TR\t: %016lx\n", ldt);
+}
+
+static void print_dr(void *arg)
+{
+ struct seq_file *seq = arg;
+ unsigned long dr;
+ int i;
+
+ for (i = 0; i < 8; i++) {
+ /* Ignore db4, db5 */
+ if ((i == 4) || (i == 5))
+ continue;
+ get_debugreg(dr, i);
+ seq_printf(seq, " dr%d\t: %016lx\n", i, dr);
+ }
+
+ seq_printf(seq, "\n MSR\t:\n");
+}
+
+static void print_apic(void *arg)
+{
+ struct seq_file *seq = arg;
+
+#ifdef CONFIG_X86_LOCAL_APIC
+ seq_printf(seq, " LAPIC\t:\n");
+ seq_printf(seq, " ID\t\t: %08x\n", apic_read(APIC_ID) >> 24);
+ seq_printf(seq, " LVR\t\t: %08x\n", apic_read(APIC_LVR));
+ seq_printf(seq, " TASKPRI\t: %08x\n", apic_read(APIC_TASKPRI));
+ seq_printf(seq, " ARBPRI\t\t: %08x\n", apic_read(APIC_ARBPRI));
+ seq_printf(seq, " PROCPRI\t: %08x\n", apic_read(APIC_PROCPRI));
+ seq_printf(seq, " LDR\t\t: %08x\n", apic_read(APIC_LDR));
+ seq_printf(seq, " DFR\t\t: %08x\n", apic_read(APIC_DFR));
+ seq_printf(seq, " SPIV\t\t: %08x\n", apic_read(APIC_SPIV));
+ seq_printf(seq, " ISR\t\t: %08x\n", apic_read(APIC_ISR));
+ seq_printf(seq, " ESR\t\t: %08x\n", apic_read(APIC_ESR));
+ seq_printf(seq, " ICR\t\t: %08x\n", apic_read(APIC_ICR));
+ seq_printf(seq, " ICR2\t\t: %08x\n", apic_read(APIC_ICR2));
+ seq_printf(seq, " LVTT\t\t: %08x\n", apic_read(APIC_LVTT));
+ seq_printf(seq, " LVTTHMR\t: %08x\n", apic_read(APIC_LVTTHMR));
+ seq_printf(seq, " LVTPC\t\t: %08x\n", apic_read(APIC_LVTPC));
+ seq_printf(seq, " LVT0\t\t: %08x\n", apic_read(APIC_LVT0));
+ seq_printf(seq, " LVT1\t\t: %08x\n", apic_read(APIC_LVT1));
+ seq_printf(seq, " LVTERR\t\t: %08x\n", apic_read(APIC_LVTERR));
+ seq_printf(seq, " TMICT\t\t: %08x\n", apic_read(APIC_TMICT));
+ seq_printf(seq, " TMCCT\t\t: %08x\n", apic_read(APIC_TMCCT));
+ seq_printf(seq, " TDCR\t\t: %08x\n", apic_read(APIC_TDCR));
+#endif /* CONFIG_X86_LOCAL_APIC */
+
+ seq_printf(seq, "\n MSR\t:\n");
+}
+
+static int cpu_seq_show(struct seq_file *seq, void *v)
+{
+ struct cpu_private *priv = seq->private;
+
+ if (priv == NULL)
+ return -EINVAL;
+
+ switch (cpu_base[priv->type].flag) {
+ case CPU_TSS:
+ smp_call_function_single(priv->cpu, print_tss, seq, 1);
+ break;
+ case CPU_CR:
+ smp_call_function_single(priv->cpu, print_cr, seq, 1);
+ break;
+ case CPU_DT:
+ smp_call_function_single(priv->cpu, print_dt, seq, 1);
+ break;
+ case CPU_DEBUG:
+ if (priv->file == CPU_INDEX_BIT)
+ smp_call_function_single(priv->cpu, print_dr, seq, 1);
+ print_msr(seq, priv->cpu, cpu_base[priv->type].flag);
+ break;
+ case CPU_APIC:
+ if (priv->file == CPU_INDEX_BIT)
+ smp_call_function_single(priv->cpu, print_apic, seq, 1);
+ print_msr(seq, priv->cpu, cpu_base[priv->type].flag);
+ break;
+
+ default:
+ print_msr(seq, priv->cpu, cpu_base[priv->type].flag);
+ break;
+ }
+ seq_printf(seq, "\n");
+
+ return 0;
+}
+
+static void *cpu_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ if (*pos == 0) /* One time is enough ;-) */
+ return seq;
+
+ return NULL;
+}
+
+static void *cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ (*pos)++;
+
+ return cpu_seq_start(seq, pos);
+}
+
+static void cpu_seq_stop(struct seq_file *seq, void *v)
+{
+}
+
+static const struct seq_operations cpu_seq_ops = {
+ .start = cpu_seq_start,
+ .next = cpu_seq_next,
+ .stop = cpu_seq_stop,
+ .show = cpu_seq_show,
+};
+
+static int cpu_seq_open(struct inode *inode, struct file *file)
+{
+ struct cpu_private *priv = inode->i_private;
+ struct seq_file *seq;
+ int err;
+
+ err = seq_open(file, &cpu_seq_ops);
+ if (!err) {
+ seq = file->private_data;
+ seq->private = priv;
+ }
+
+ return err;
+}
+
+static int write_msr(struct cpu_private *priv, u64 val)
+{
+ u32 low, high;
+
+ high = (val >> 32) & 0xffffffff;
+ low = val & 0xffffffff;
+
+ if (!wrmsr_safe_on_cpu(priv->cpu, priv->reg, low, high))
+ return 0;
+
+ return -EPERM;
+}
+
+static int write_cpu_register(struct cpu_private *priv, const char *buf)
+{
+ int ret = -EPERM;
+ u64 val;
+
+ ret = strict_strtoull(buf, 0, &val);
+ if (ret < 0)
+ return ret;
+
+ /* Supporting only MSRs */
+ if (priv->type < CPU_TSS_BIT)
+ return write_msr(priv, val);
+
+ return ret;
+}
+
+static ssize_t cpu_write(struct file *file, const char __user *ubuf,
+ size_t count, loff_t *off)
+{
+ struct seq_file *seq = file->private_data;
+ struct cpu_private *priv = seq->private;
+ char buf[19];
+
+ if ((priv == NULL) || (count >= sizeof(buf)))
+ return -EINVAL;
+
+ if (copy_from_user(&buf, ubuf, count))
+ return -EFAULT;
+
+ buf[count] = 0;
+
+ if ((cpu_base[priv->type].write) && (cpu_file[priv->file].write))
+ if (!write_cpu_register(priv, buf))
+ return count;
+
+ return -EACCES;
+}
+
+static const struct file_operations cpu_fops = {
+ .owner = THIS_MODULE,
+ .open = cpu_seq_open,
+ .read = seq_read,
+ .write = cpu_write,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+static int cpu_create_file(unsigned cpu, unsigned type, unsigned reg,
+ unsigned file, struct dentry *dentry)
+{
+ struct cpu_private *priv = NULL;
+
+ /* Already intialized */
+ if (file == CPU_INDEX_BIT)
+ if (per_cpu(cpu_arr[type].init, cpu))
+ return 0;
+
+ priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+ if (priv == NULL)
+ return -ENOMEM;
+
+ priv->cpu = cpu;
+ priv->type = type;
+ priv->reg = reg;
+ priv->file = file;
+ mutex_lock(&cpu_debug_lock);
+ per_cpu(priv_arr[type], cpu) = priv;
+ per_cpu(cpu_priv_count, cpu)++;
+ mutex_unlock(&cpu_debug_lock);
+
+ if (file)
+ debugfs_create_file(cpu_file[file].name, S_IRUGO,
+ dentry, (void *)priv, &cpu_fops);
+ else {
+ debugfs_create_file(cpu_base[type].name, S_IRUGO,
+ per_cpu(cpu_arr[type].dentry, cpu),
+ (void *)priv, &cpu_fops);
+ mutex_lock(&cpu_debug_lock);
+ per_cpu(cpu_arr[type].init, cpu) = 1;
+ mutex_unlock(&cpu_debug_lock);
+ }
+
+ return 0;
+}
+
+static int cpu_init_regfiles(unsigned cpu, unsigned int type, unsigned reg,
+ struct dentry *dentry)
+{
+ unsigned file;
+ int err = 0;
+
+ for (file = 0; file < ARRAY_SIZE(cpu_file); file++) {
+ err = cpu_create_file(cpu, type, reg, file, dentry);
+ if (err)
+ return err;
+ }
+
+ return err;
+}
+
+static int cpu_init_msr(unsigned cpu, unsigned type, struct dentry *dentry)
+{
+ struct dentry *cpu_dentry = NULL;
+ unsigned reg, reg_min, reg_max;
+ int i, range, err = 0;
+ char reg_dir[12];
+ u32 low, high;
+
+ range = get_cpu_range_count(cpu);
+
+ for (i = 0; i < range; i++) {
+ if (!get_cpu_range(cpu, &reg_min, &reg_max, i,
+ cpu_base[type].flag))
+ continue;
+
+ for (reg = reg_min; reg <= reg_max; reg++) {
+ if (rdmsr_safe_on_cpu(cpu, reg, &low, &high))
+ continue;
+
+ sprintf(reg_dir, "0x%x", reg);
+ cpu_dentry = debugfs_create_dir(reg_dir, dentry);
+ err = cpu_init_regfiles(cpu, type, reg, cpu_dentry);
+ if (err)
+ return err;
+ }
+ }
+
+ return err;
+}
+
+static int cpu_init_allreg(unsigned cpu, struct dentry *dentry)
+{
+ struct dentry *cpu_dentry = NULL;
+ unsigned type;
+ int err = 0;
+
+ for (type = 0; type < ARRAY_SIZE(cpu_base) - 1; type++) {
+ if (!is_typeflag_valid(cpu, cpu_base[type].flag))
+ continue;
+ cpu_dentry = debugfs_create_dir(cpu_base[type].name, dentry);
+ per_cpu(cpu_arr[type].dentry, cpu) = cpu_dentry;
+
+ if (type < CPU_TSS_BIT)
+ err = cpu_init_msr(cpu, type, cpu_dentry);
+ else
+ err = cpu_create_file(cpu, type, 0, CPU_INDEX_BIT,
+ cpu_dentry);
+ if (err)
+ return err;
+ }
+
+ return err;
+}
+
+static int cpu_init_cpu(void)
+{
+ struct dentry *cpu_dentry = NULL;
+ struct cpuinfo_x86 *cpui;
+ char cpu_dir[12];
+ unsigned cpu;
+ int err = 0;
+
+ for (cpu = 0; cpu < nr_cpu_ids; cpu++) {
+ cpui = &cpu_data(cpu);
+ if (!cpu_has(cpui, X86_FEATURE_MSR))
+ continue;
+ per_cpu(cpu_model, cpu) = ((cpui->x86_vendor << 16) |
+ (cpui->x86 << 8) |
+ (cpui->x86_model));
+ per_cpu(cpu_modelflag, cpu) = get_cpu_modelflag(cpu);
+
+ sprintf(cpu_dir, "cpu%d", cpu);
+ cpu_dentry = debugfs_create_dir(cpu_dir, cpu_debugfs_dir);
+ err = cpu_init_allreg(cpu, cpu_dentry);
+
+ pr_info("cpu%d(%d) debug files %d\n",
+ cpu, nr_cpu_ids, per_cpu(cpu_priv_count, cpu));
+ if (per_cpu(cpu_priv_count, cpu) > MAX_CPU_FILES) {
+ pr_err("Register files count %d exceeds limit %d\n",
+ per_cpu(cpu_priv_count, cpu), MAX_CPU_FILES);
+ per_cpu(cpu_priv_count, cpu) = MAX_CPU_FILES;
+ err = -ENFILE;
+ }
+ if (err)
+ return err;
+ }
+
+ return err;
+}
+
+static int __init cpu_debug_init(void)
+{
+ cpu_debugfs_dir = debugfs_create_dir("cpu", arch_debugfs_dir);
+
+ return cpu_init_cpu();
+}
+
+static void __exit cpu_debug_exit(void)
+{
+ int i, cpu;
+
+ if (cpu_debugfs_dir)
+ debugfs_remove_recursive(cpu_debugfs_dir);
+
+ for (cpu = 0; cpu < nr_cpu_ids; cpu++)
+ for (i = 0; i < per_cpu(cpu_priv_count, cpu); i++)
+ kfree(per_cpu(priv_arr[i], cpu));
+}
+
+module_init(cpu_debug_init);
+module_exit(cpu_debug_exit);
+
+MODULE_AUTHOR("Jaswinder Singh Rajput");
+MODULE_DESCRIPTION("CPU Debug module");
+MODULE_LICENSE("GPL");
diff --git a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
index 23da96e57b17..19f6b9d27e83 100644
--- a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
+++ b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
@@ -33,7 +33,7 @@
#include <linux/cpufreq.h>
#include <linux/compiler.h>
#include <linux/dmi.h>
-#include <linux/ftrace.h>
+#include <trace/power.h>
#include <linux/acpi.h>
#include <linux/io.h>
@@ -72,6 +72,8 @@ struct acpi_cpufreq_data {
static DEFINE_PER_CPU(struct acpi_cpufreq_data *, drv_data);
+DEFINE_TRACE(power_mark);
+
/* acpi_perf_data is a pointer to percpu data. */
static struct acpi_processor_performance *acpi_perf_data;
@@ -680,6 +682,18 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
perf->states[i].transition_latency * 1000;
}
+ /* Check for high latency (>20uS) from buggy BIOSes, like on T42 */
+ if (perf->control_register.space_id == ACPI_ADR_SPACE_FIXED_HARDWARE &&
+ policy->cpuinfo.transition_latency > 20 * 1000) {
+ static int print_once;
+ policy->cpuinfo.transition_latency = 20 * 1000;
+ if (!print_once) {
+ print_once = 1;
+ printk(KERN_INFO "Capping off P-state tranision latency"
+ " at 20 uS\n");
+ }
+ }
+
data->max_freq = perf->states[0].core_frequency * 1000;
/* table init */
for (i = 0; i < perf->state_count; i++) {
diff --git a/arch/x86/kernel/cpu/cpufreq/longhaul.c b/arch/x86/kernel/cpu/cpufreq/longhaul.c
index f1c51aea064d..0bd48e65a0ca 100644
--- a/arch/x86/kernel/cpu/cpufreq/longhaul.c
+++ b/arch/x86/kernel/cpu/cpufreq/longhaul.c
@@ -305,7 +305,7 @@ retry_loop:
outb(3, 0x22);
} else if ((pr != NULL) && pr->flags.bm_control) {
/* Disable bus master arbitration */
- acpi_set_register(ACPI_BITREG_ARB_DISABLE, 1);
+ acpi_write_bit_register(ACPI_BITREG_ARB_DISABLE, 1);
}
switch (longhaul_version) {
@@ -328,7 +328,7 @@ retry_loop:
case TYPE_POWERSAVER:
if (longhaul_flags & USE_ACPI_C3) {
/* Don't allow wakeup */
- acpi_set_register(ACPI_BITREG_BUS_MASTER_RLD, 0);
+ acpi_write_bit_register(ACPI_BITREG_BUS_MASTER_RLD, 0);
do_powersaver(cx->address, mults_index, dir);
} else {
do_powersaver(0, mults_index, dir);
@@ -341,7 +341,7 @@ retry_loop:
outb(0, 0x22);
} else if ((pr != NULL) && pr->flags.bm_control) {
/* Enable bus master arbitration */
- acpi_set_register(ACPI_BITREG_ARB_DISABLE, 0);
+ acpi_write_bit_register(ACPI_BITREG_ARB_DISABLE, 0);
}
outb(pic2_mask, 0xA1); /* restore mask */
outb(pic1_mask, 0x21);
diff --git a/arch/x86/kernel/cpu/cpufreq/p4-clockmod.c b/arch/x86/kernel/cpu/cpufreq/p4-clockmod.c
index 41ed94915f97..6ac55bd341ae 100644
--- a/arch/x86/kernel/cpu/cpufreq/p4-clockmod.c
+++ b/arch/x86/kernel/cpu/cpufreq/p4-clockmod.c
@@ -211,7 +211,7 @@ static int cpufreq_p4_cpu_init(struct cpufreq_policy *policy)
unsigned int i;
#ifdef CONFIG_SMP
- cpumask_copy(policy->cpus, &per_cpu(cpu_sibling_map, policy->cpu));
+ cpumask_copy(policy->cpus, cpu_sibling_mask(policy->cpu));
#endif
/* Errata workaround */
diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
index a15ac94e0b9b..4709ead2db52 100644
--- a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
+++ b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
@@ -54,7 +54,10 @@ static DEFINE_PER_CPU(struct powernow_k8_data *, powernow_data);
static int cpu_family = CPU_OPTERON;
#ifndef CONFIG_SMP
-DEFINE_PER_CPU(cpumask_t, cpu_core_map);
+static inline const struct cpumask *cpu_core_mask(int cpu)
+{
+ return cpumask_of(0);
+}
#endif
/* Return a frequency in MHz, given an input fid */
@@ -699,7 +702,7 @@ static int fill_powernow_table(struct powernow_k8_data *data,
dprintk("cfid 0x%x, cvid 0x%x\n", data->currfid, data->currvid);
data->powernow_table = powernow_table;
- if (first_cpu(per_cpu(cpu_core_map, data->cpu)) == data->cpu)
+ if (cpumask_first(cpu_core_mask(data->cpu)) == data->cpu)
print_basics(data);
for (j = 0; j < data->numps; j++)
@@ -862,7 +865,7 @@ static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data)
/* fill in data */
data->numps = data->acpi_data.state_count;
- if (first_cpu(per_cpu(cpu_core_map, data->cpu)) == data->cpu)
+ if (cpumask_first(cpu_core_mask(data->cpu)) == data->cpu)
print_basics(data);
powernow_k8_acpi_pst_values(data, 0);
@@ -1300,7 +1303,7 @@ static int __cpuinit powernowk8_cpu_init(struct cpufreq_policy *pol)
if (cpu_family == CPU_HW_PSTATE)
cpumask_copy(pol->cpus, cpumask_of(pol->cpu));
else
- cpumask_copy(pol->cpus, &per_cpu(cpu_core_map, pol->cpu));
+ cpumask_copy(pol->cpus, cpu_core_mask(pol->cpu));
data->available_cores = pol->cpus;
if (cpu_family == CPU_HW_PSTATE)
@@ -1365,7 +1368,7 @@ static unsigned int powernowk8_get(unsigned int cpu)
unsigned int khz = 0;
unsigned int first;
- first = first_cpu(per_cpu(cpu_core_map, cpu));
+ first = cpumask_first(cpu_core_mask(cpu));
data = per_cpu(powernow_data, first);
if (!data)
diff --git a/arch/x86/kernel/cpu/cpufreq/speedstep-ich.c b/arch/x86/kernel/cpu/cpufreq/speedstep-ich.c
index 8bbb11adb315..016c1a4fa3fc 100644
--- a/arch/x86/kernel/cpu/cpufreq/speedstep-ich.c
+++ b/arch/x86/kernel/cpu/cpufreq/speedstep-ich.c
@@ -321,7 +321,7 @@ static int speedstep_cpu_init(struct cpufreq_policy *policy)
/* only run on CPU to be set, or on its sibling */
#ifdef CONFIG_SMP
- cpumask_copy(policy->cpus, &per_cpu(cpu_sibling_map, policy->cpu));
+ cpumask_copy(policy->cpus, cpu_sibling_mask(policy->cpu));
#endif
cpus_allowed = current->cpus_allowed;
diff --git a/arch/x86/kernel/cpu/cyrix.c b/arch/x86/kernel/cpu/cyrix.c
index ffd0f5ed071a..593171e967ef 100644
--- a/arch/x86/kernel/cpu/cyrix.c
+++ b/arch/x86/kernel/cpu/cyrix.c
@@ -61,23 +61,23 @@ static void __cpuinit do_cyrix_devid(unsigned char *dir0, unsigned char *dir1)
*/
static unsigned char Cx86_dir0_msb __cpuinitdata = 0;
-static char Cx86_model[][9] __cpuinitdata = {
+static const char __cpuinitconst Cx86_model[][9] = {
"Cx486", "Cx486", "5x86 ", "6x86", "MediaGX ", "6x86MX ",
"M II ", "Unknown"
};
-static char Cx486_name[][5] __cpuinitdata = {
+static const char __cpuinitconst Cx486_name[][5] = {
"SLC", "DLC", "SLC2", "DLC2", "SRx", "DRx",
"SRx2", "DRx2"
};
-static char Cx486S_name[][4] __cpuinitdata = {
+static const char __cpuinitconst Cx486S_name[][4] = {
"S", "S2", "Se", "S2e"
};
-static char Cx486D_name[][4] __cpuinitdata = {
+static const char __cpuinitconst Cx486D_name[][4] = {
"DX", "DX2", "?", "?", "?", "DX4"
};
static char Cx86_cb[] __cpuinitdata = "?.5x Core/Bus Clock";
-static char cyrix_model_mult1[] __cpuinitdata = "12??43";
-static char cyrix_model_mult2[] __cpuinitdata = "12233445";
+static const char __cpuinitconst cyrix_model_mult1[] = "12??43";
+static const char __cpuinitconst cyrix_model_mult2[] = "12233445";
/*
* Reset the slow-loop (SLOP) bit on the 686(L) which is set by some old
@@ -435,7 +435,7 @@ static void __cpuinit cyrix_identify(struct cpuinfo_x86 *c)
}
}
-static struct cpu_dev cyrix_cpu_dev __cpuinitdata = {
+static const struct cpu_dev __cpuinitconst cyrix_cpu_dev = {
.c_vendor = "Cyrix",
.c_ident = { "CyrixInstead" },
.c_early_init = early_init_cyrix,
@@ -446,7 +446,7 @@ static struct cpu_dev cyrix_cpu_dev __cpuinitdata = {
cpu_dev_register(cyrix_cpu_dev);
-static struct cpu_dev nsc_cpu_dev __cpuinitdata = {
+static const struct cpu_dev __cpuinitconst nsc_cpu_dev = {
.c_vendor = "NSC",
.c_ident = { "Geode by NSC" },
.c_init = init_nsc,
diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index 1a89a2b68d15..7437fa133c02 100644
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -14,6 +14,7 @@
#include <asm/uaccess.h>
#include <asm/ds.h>
#include <asm/bugs.h>
+#include <asm/cpu.h>
#ifdef CONFIG_X86_64
#include <asm/topology.h>
@@ -54,6 +55,11 @@ static void __cpuinit early_init_intel(struct cpuinfo_x86 *c)
c->x86_cache_alignment = 128;
#endif
+ /* CPUID workaround for 0F33/0F34 CPU */
+ if (c->x86 == 0xF && c->x86_model == 0x3
+ && (c->x86_mask == 0x3 || c->x86_mask == 0x4))
+ c->x86_phys_bits = 36;
+
/*
* c->x86_power is 8000_0007 edx. Bit 8 is TSC runs at constant rate
* with P/T states and does not stop in deep C-states.
@@ -116,6 +122,28 @@ static void __cpuinit trap_init_f00f_bug(void)
}
#endif
+static void __cpuinit intel_smp_check(struct cpuinfo_x86 *c)
+{
+#ifdef CONFIG_SMP
+ /* calling is from identify_secondary_cpu() ? */
+ if (c->cpu_index == boot_cpu_id)
+ return;
+
+ /*
+ * Mask B, Pentium, but not Pentium MMX
+ */
+ if (c->x86 == 5 &&
+ c->x86_mask >= 1 && c->x86_mask <= 4 &&
+ c->x86_model <= 3) {
+ /*
+ * Remember we have B step Pentia with bugs
+ */
+ WARN_ONCE(1, "WARNING: SMP operation may be unreliable"
+ "with B stepping processors.\n");
+ }
+#endif
+}
+
static void __cpuinit intel_workarounds(struct cpuinfo_x86 *c)
{
unsigned long lo, hi;
@@ -192,6 +220,8 @@ static void __cpuinit intel_workarounds(struct cpuinfo_x86 *c)
#ifdef CONFIG_X86_NUMAQ
numaq_tsc_disable();
#endif
+
+ intel_smp_check(c);
}
#else
static void __cpuinit intel_workarounds(struct cpuinfo_x86 *c)
@@ -391,7 +421,7 @@ static unsigned int __cpuinit intel_size_cache(struct cpuinfo_x86 *c, unsigned i
}
#endif
-static struct cpu_dev intel_cpu_dev __cpuinitdata = {
+static const struct cpu_dev __cpuinitconst intel_cpu_dev = {
.c_vendor = "Intel",
.c_ident = { "GenuineIntel" },
#ifdef CONFIG_X86_32
diff --git a/arch/x86/kernel/cpu/intel_cacheinfo.c b/arch/x86/kernel/cpu/intel_cacheinfo.c
index 7293508d8f5c..483eda96e102 100644
--- a/arch/x86/kernel/cpu/intel_cacheinfo.c
+++ b/arch/x86/kernel/cpu/intel_cacheinfo.c
@@ -32,7 +32,7 @@ struct _cache_table
};
/* all the cache descriptor types we care about (no TLB or trace cache entries) */
-static struct _cache_table cache_table[] __cpuinitdata =
+static const struct _cache_table __cpuinitconst cache_table[] =
{
{ 0x06, LVL_1_INST, 8 }, /* 4-way set assoc, 32 byte line size */
{ 0x08, LVL_1_INST, 16 }, /* 4-way set assoc, 32 byte line size */
@@ -159,7 +159,7 @@ struct _cpuid4_info_regs {
unsigned long can_disable;
};
-#ifdef CONFIG_PCI
+#if defined(CONFIG_PCI) && defined(CONFIG_SYSFS)
static struct pci_device_id k8_nb_id[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x1103) },
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x1203) },
@@ -206,15 +206,15 @@ union l3_cache {
unsigned val;
};
-static unsigned short assocs[] __cpuinitdata = {
+static const unsigned short __cpuinitconst assocs[] = {
[1] = 1, [2] = 2, [4] = 4, [6] = 8,
[8] = 16, [0xa] = 32, [0xb] = 48,
[0xc] = 64,
[0xf] = 0xffff // ??
};
-static unsigned char levels[] __cpuinitdata = { 1, 1, 2, 3 };
-static unsigned char types[] __cpuinitdata = { 1, 2, 3, 3 };
+static const unsigned char __cpuinitconst levels[] = { 1, 1, 2, 3 };
+static const unsigned char __cpuinitconst types[] = { 1, 2, 3, 3 };
static void __cpuinit
amd_cpuid4(int leaf, union _cpuid4_leaf_eax *eax,
@@ -324,15 +324,6 @@ __cpuinit cpuid4_cache_lookup_regs(int index,
return 0;
}
-static int
-__cpuinit cpuid4_cache_lookup(int index, struct _cpuid4_info *this_leaf)
-{
- struct _cpuid4_info_regs *leaf_regs =
- (struct _cpuid4_info_regs *)this_leaf;
-
- return cpuid4_cache_lookup_regs(index, leaf_regs);
-}
-
static int __cpuinit find_num_cache_leaves(void)
{
unsigned int eax, ebx, ecx, edx;
@@ -508,6 +499,8 @@ unsigned int __cpuinit init_intel_cacheinfo(struct cpuinfo_x86 *c)
return l2;
}
+#ifdef CONFIG_SYSFS
+
/* pointer to _cpuid4_info array (for each cache leaf) */
static DEFINE_PER_CPU(struct _cpuid4_info *, cpuid4_info);
#define CPUID4_INFO_IDX(x, y) (&((per_cpu(cpuid4_info, x))[y]))
@@ -571,6 +564,15 @@ static void __cpuinit free_cache_attributes(unsigned int cpu)
per_cpu(cpuid4_info, cpu) = NULL;
}
+static int
+__cpuinit cpuid4_cache_lookup(int index, struct _cpuid4_info *this_leaf)
+{
+ struct _cpuid4_info_regs *leaf_regs =
+ (struct _cpuid4_info_regs *)this_leaf;
+
+ return cpuid4_cache_lookup_regs(index, leaf_regs);
+}
+
static void __cpuinit get_cpu_leaves(void *_retval)
{
int j, *retval = _retval, cpu = smp_processor_id();
@@ -612,8 +614,6 @@ static int __cpuinit detect_cache_attributes(unsigned int cpu)
return retval;
}
-#ifdef CONFIG_SYSFS
-
#include <linux/kobject.h>
#include <linux/sysfs.h>
diff --git a/arch/x86/kernel/cpu/mcheck/Makefile b/arch/x86/kernel/cpu/mcheck/Makefile
index d7d2323bbb69..b2f89829bbe8 100644
--- a/arch/x86/kernel/cpu/mcheck/Makefile
+++ b/arch/x86/kernel/cpu/mcheck/Makefile
@@ -4,3 +4,4 @@ obj-$(CONFIG_X86_32) += k7.o p4.o p5.o p6.o winchip.o
obj-$(CONFIG_X86_MCE_INTEL) += mce_intel_64.o
obj-$(CONFIG_X86_MCE_AMD) += mce_amd_64.o
obj-$(CONFIG_X86_MCE_NONFATAL) += non-fatal.o
+obj-$(CONFIG_X86_MCE_THRESHOLD) += threshold.o
diff --git a/arch/x86/kernel/cpu/mcheck/mce_32.c b/arch/x86/kernel/cpu/mcheck/mce_32.c
index dfaebce3633e..3552119b091d 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_32.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_32.c
@@ -60,20 +60,6 @@ void mcheck_init(struct cpuinfo_x86 *c)
}
}
-static unsigned long old_cr4 __initdata;
-
-void __init stop_mce(void)
-{
- old_cr4 = read_cr4();
- clear_in_cr4(X86_CR4_MCE);
-}
-
-void __init restart_mce(void)
-{
- if (old_cr4 & X86_CR4_MCE)
- set_in_cr4(X86_CR4_MCE);
-}
-
static int __init mcheck_disable(char *str)
{
mce_disabled = 1;
diff --git a/arch/x86/kernel/cpu/mcheck/mce_64.c b/arch/x86/kernel/cpu/mcheck/mce_64.c
index fe79985ce0f2..863f89568b1a 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_64.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_64.c
@@ -3,6 +3,8 @@
* K8 parts Copyright 2002,2003 Andi Kleen, SuSE Labs.
* Rest from unknown author(s).
* 2004 Andi Kleen. Rewrote most of it.
+ * Copyright 2008 Intel Corporation
+ * Author: Andi Kleen
*/
#include <linux/init.h>
@@ -24,6 +26,9 @@
#include <linux/ctype.h>
#include <linux/kmod.h>
#include <linux/kdebug.h>
+#include <linux/kobject.h>
+#include <linux/sysfs.h>
+#include <linux/ratelimit.h>
#include <asm/processor.h>
#include <asm/msr.h>
#include <asm/mce.h>
@@ -32,7 +37,6 @@
#include <asm/idle.h>
#define MISC_MCELOG_MINOR 227
-#define NR_SYSFS_BANKS 6
atomic_t mce_entry;
@@ -47,7 +51,7 @@ static int mce_dont_init;
*/
static int tolerant = 1;
static int banks;
-static unsigned long bank[NR_SYSFS_BANKS] = { [0 ... NR_SYSFS_BANKS-1] = ~0UL };
+static u64 *bank;
static unsigned long notify_user;
static int rip_msr;
static int mce_bootlog = -1;
@@ -58,6 +62,19 @@ static char *trigger_argv[2] = { trigger, NULL };
static DECLARE_WAIT_QUEUE_HEAD(mce_wait);
+/* MCA banks polled by the period polling timer for corrected events */
+DEFINE_PER_CPU(mce_banks_t, mce_poll_banks) = {
+ [0 ... BITS_TO_LONGS(MAX_NR_BANKS)-1] = ~0UL
+};
+
+/* Do initial initialization of a struct mce */
+void mce_setup(struct mce *m)
+{
+ memset(m, 0, sizeof(struct mce));
+ m->cpu = smp_processor_id();
+ rdtscll(m->tsc);
+}
+
/*
* Lockless MCE logging infrastructure.
* This avoids deadlocks on printk locks without having to break locks. Also
@@ -119,11 +136,11 @@ static void print_mce(struct mce *m)
print_symbol("{%s}", m->ip);
printk("\n");
}
- printk(KERN_EMERG "TSC %Lx ", m->tsc);
+ printk(KERN_EMERG "TSC %llx ", m->tsc);
if (m->addr)
- printk("ADDR %Lx ", m->addr);
+ printk("ADDR %llx ", m->addr);
if (m->misc)
- printk("MISC %Lx ", m->misc);
+ printk("MISC %llx ", m->misc);
printk("\n");
printk(KERN_EMERG "This is not a software problem!\n");
printk(KERN_EMERG "Run through mcelog --ascii to decode "
@@ -149,8 +166,10 @@ static void mce_panic(char *msg, struct mce *backup, unsigned long start)
panic(msg);
}
-static int mce_available(struct cpuinfo_x86 *c)
+int mce_available(struct cpuinfo_x86 *c)
{
+ if (mce_dont_init)
+ return 0;
return cpu_has(c, X86_FEATURE_MCE) && cpu_has(c, X86_FEATURE_MCA);
}
@@ -172,7 +191,77 @@ static inline void mce_get_rip(struct mce *m, struct pt_regs *regs)
}
/*
- * The actual machine check handler
+ * Poll for corrected events or events that happened before reset.
+ * Those are just logged through /dev/mcelog.
+ *
+ * This is executed in standard interrupt context.
+ */
+void machine_check_poll(enum mcp_flags flags, mce_banks_t *b)
+{
+ struct mce m;
+ int i;
+
+ mce_setup(&m);
+
+ rdmsrl(MSR_IA32_MCG_STATUS, m.mcgstatus);
+ for (i = 0; i < banks; i++) {
+ if (!bank[i] || !test_bit(i, *b))
+ continue;
+
+ m.misc = 0;
+ m.addr = 0;
+ m.bank = i;
+ m.tsc = 0;
+
+ barrier();
+ rdmsrl(MSR_IA32_MC0_STATUS + i*4, m.status);
+ if (!(m.status & MCI_STATUS_VAL))
+ continue;
+
+ /*
+ * Uncorrected events are handled by the exception handler
+ * when it is enabled. But when the exception is disabled log
+ * everything.
+ *
+ * TBD do the same check for MCI_STATUS_EN here?
+ */
+ if ((m.status & MCI_STATUS_UC) && !(flags & MCP_UC))
+ continue;
+
+ if (m.status & MCI_STATUS_MISCV)
+ rdmsrl(MSR_IA32_MC0_MISC + i*4, m.misc);
+ if (m.status & MCI_STATUS_ADDRV)
+ rdmsrl(MSR_IA32_MC0_ADDR + i*4, m.addr);
+
+ if (!(flags & MCP_TIMESTAMP))
+ m.tsc = 0;
+ /*
+ * Don't get the IP here because it's unlikely to
+ * have anything to do with the actual error location.
+ */
+
+ mce_log(&m);
+ add_taint(TAINT_MACHINE_CHECK);
+
+ /*
+ * Clear state for this bank.
+ */
+ wrmsrl(MSR_IA32_MC0_STATUS+4*i, 0);
+ }
+
+ /*
+ * Don't clear MCG_STATUS here because it's only defined for
+ * exceptions.
+ */
+}
+
+/*
+ * The actual machine check handler. This only handles real
+ * exceptions when something got corrupted coming in through int 18.
+ *
+ * This is executed in NMI context not subject to normal locking rules. This
+ * implies that most kernel services cannot be safely used. Don't even
+ * think about putting a printk in there!
*/
void do_machine_check(struct pt_regs * regs, long error_code)
{
@@ -190,17 +279,18 @@ void do_machine_check(struct pt_regs * regs, long error_code)
* error.
*/
int kill_it = 0;
+ DECLARE_BITMAP(toclear, MAX_NR_BANKS);
atomic_inc(&mce_entry);
- if ((regs
- && notify_die(DIE_NMI, "machine check", regs, error_code,
+ if (notify_die(DIE_NMI, "machine check", regs, error_code,
18, SIGKILL) == NOTIFY_STOP)
- || !banks)
+ goto out2;
+ if (!banks)
goto out2;
- memset(&m, 0, sizeof(struct mce));
- m.cpu = smp_processor_id();
+ mce_setup(&m);
+
rdmsrl(MSR_IA32_MCG_STATUS, m.mcgstatus);
/* if the restart IP is not valid, we're done for */
if (!(m.mcgstatus & MCG_STATUS_RIPV))
@@ -210,18 +300,32 @@ void do_machine_check(struct pt_regs * regs, long error_code)
barrier();
for (i = 0; i < banks; i++) {
- if (i < NR_SYSFS_BANKS && !bank[i])
+ __clear_bit(i, toclear);
+ if (!bank[i])
continue;
m.misc = 0;
m.addr = 0;
m.bank = i;
- m.tsc = 0;
rdmsrl(MSR_IA32_MC0_STATUS + i*4, m.status);
if ((m.status & MCI_STATUS_VAL) == 0)
continue;
+ /*
+ * Non uncorrected errors are handled by machine_check_poll
+ * Leave them alone.
+ */
+ if ((m.status & MCI_STATUS_UC) == 0)
+ continue;
+
+ /*
+ * Set taint even when machine check was not enabled.
+ */
+ add_taint(TAINT_MACHINE_CHECK);
+
+ __set_bit(i, toclear);
+
if (m.status & MCI_STATUS_EN) {
/* if PCC was set, there's no way out */
no_way_out |= !!(m.status & MCI_STATUS_PCC);
@@ -235,6 +339,12 @@ void do_machine_check(struct pt_regs * regs, long error_code)
no_way_out = 1;
kill_it = 1;
}
+ } else {
+ /*
+ * Machine check event was not enabled. Clear, but
+ * ignore.
+ */
+ continue;
}
if (m.status & MCI_STATUS_MISCV)
@@ -243,10 +353,7 @@ void do_machine_check(struct pt_regs * regs, long error_code)
rdmsrl(MSR_IA32_MC0_ADDR + i*4, m.addr);
mce_get_rip(&m, regs);
- if (error_code >= 0)
- rdtscll(m.tsc);
- if (error_code != -2)
- mce_log(&m);
+ mce_log(&m);
/* Did this bank cause the exception? */
/* Assume that the bank with uncorrectable errors did it,
@@ -255,14 +362,8 @@ void do_machine_check(struct pt_regs * regs, long error_code)
panicm = m;
panicm_found = 1;
}
-
- add_taint(TAINT_MACHINE_CHECK);
}
- /* Never do anything final in the polling timer */
- if (!regs)
- goto out;
-
/* If we didn't find an uncorrectable error, pick
the last one (shouldn't happen, just being safe). */
if (!panicm_found)
@@ -309,10 +410,11 @@ void do_machine_check(struct pt_regs * regs, long error_code)
/* notify userspace ASAP */
set_thread_flag(TIF_MCE_NOTIFY);
- out:
/* the last thing we do is clear state */
- for (i = 0; i < banks; i++)
- wrmsrl(MSR_IA32_MC0_STATUS+4*i, 0);
+ for (i = 0; i < banks; i++) {
+ if (test_bit(i, toclear))
+ wrmsrl(MSR_IA32_MC0_STATUS+4*i, 0);
+ }
wrmsrl(MSR_IA32_MCG_STATUS, 0);
out2:
atomic_dec(&mce_entry);
@@ -332,15 +434,13 @@ void do_machine_check(struct pt_regs * regs, long error_code)
* and historically has been the register value of the
* MSR_IA32_THERMAL_STATUS (Intel) msr.
*/
-void mce_log_therm_throt_event(unsigned int cpu, __u64 status)
+void mce_log_therm_throt_event(__u64 status)
{
struct mce m;
- memset(&m, 0, sizeof(m));
- m.cpu = cpu;
+ mce_setup(&m);
m.bank = MCE_THERMAL_BANK;
m.status = status;
- rdtscll(m.tsc);
mce_log(&m);
}
#endif /* CONFIG_X86_MCE_INTEL */
@@ -353,18 +453,18 @@ void mce_log_therm_throt_event(unsigned int cpu, __u64 status)
static int check_interval = 5 * 60; /* 5 minutes */
static int next_interval; /* in jiffies */
-static void mcheck_timer(struct work_struct *work);
-static DECLARE_DELAYED_WORK(mcheck_work, mcheck_timer);
+static void mcheck_timer(unsigned long);
+static DEFINE_PER_CPU(struct timer_list, mce_timer);
-static void mcheck_check_cpu(void *info)
+static void mcheck_timer(unsigned long data)
{
- if (mce_available(&current_cpu_data))
- do_machine_check(NULL, 0);
-}
+ struct timer_list *t = &per_cpu(mce_timer, data);
-static void mcheck_timer(struct work_struct *work)
-{
- on_each_cpu(mcheck_check_cpu, NULL, 1);
+ WARN_ON(smp_processor_id() != data);
+
+ if (mce_available(&current_cpu_data))
+ machine_check_poll(MCP_TIMESTAMP,
+ &__get_cpu_var(mce_poll_banks));
/*
* Alert userspace if needed. If we logged an MCE, reduce the
@@ -377,31 +477,41 @@ static void mcheck_timer(struct work_struct *work)
(int)round_jiffies_relative(check_interval*HZ));
}
- schedule_delayed_work(&mcheck_work, next_interval);
+ t->expires = jiffies + next_interval;
+ add_timer(t);
+}
+
+static void mce_do_trigger(struct work_struct *work)
+{
+ call_usermodehelper(trigger, trigger_argv, NULL, UMH_NO_WAIT);
}
+static DECLARE_WORK(mce_trigger_work, mce_do_trigger);
+
/*
- * This is only called from process context. This is where we do
- * anything we need to alert userspace about new MCEs. This is called
- * directly from the poller and also from entry.S and idle, thanks to
- * TIF_MCE_NOTIFY.
+ * Notify the user(s) about new machine check events.
+ * Can be called from interrupt context, but not from machine check/NMI
+ * context.
*/
int mce_notify_user(void)
{
+ /* Not more than two messages every minute */
+ static DEFINE_RATELIMIT_STATE(ratelimit, 60*HZ, 2);
+
clear_thread_flag(TIF_MCE_NOTIFY);
if (test_and_clear_bit(0, &notify_user)) {
- static unsigned long last_print;
- unsigned long now = jiffies;
-
wake_up_interruptible(&mce_wait);
- if (trigger[0])
- call_usermodehelper(trigger, trigger_argv, NULL,
- UMH_NO_WAIT);
- if (time_after_eq(now, last_print + (check_interval*HZ))) {
- last_print = now;
+ /*
+ * There is no risk of missing notifications because
+ * work_pending is always cleared before the function is
+ * executed.
+ */
+ if (trigger[0] && !work_pending(&mce_trigger_work))
+ schedule_work(&mce_trigger_work);
+
+ if (__ratelimit(&ratelimit))
printk(KERN_INFO "Machine check events logged\n");
- }
return 1;
}
@@ -425,63 +535,78 @@ static struct notifier_block mce_idle_notifier = {
static __init int periodic_mcheck_init(void)
{
- next_interval = check_interval * HZ;
- if (next_interval)
- schedule_delayed_work(&mcheck_work,
- round_jiffies_relative(next_interval));
- idle_notifier_register(&mce_idle_notifier);
- return 0;
+ idle_notifier_register(&mce_idle_notifier);
+ return 0;
}
__initcall(periodic_mcheck_init);
-
/*
* Initialize Machine Checks for a CPU.
*/
-static void mce_init(void *dummy)
+static int mce_cap_init(void)
{
u64 cap;
- int i;
+ unsigned b;
rdmsrl(MSR_IA32_MCG_CAP, cap);
- banks = cap & 0xff;
- if (banks > MCE_EXTENDED_BANK) {
- banks = MCE_EXTENDED_BANK;
- printk(KERN_INFO "MCE: warning: using only %d banks\n",
- MCE_EXTENDED_BANK);
+ b = cap & 0xff;
+ if (b > MAX_NR_BANKS) {
+ printk(KERN_WARNING
+ "MCE: Using only %u machine check banks out of %u\n",
+ MAX_NR_BANKS, b);
+ b = MAX_NR_BANKS;
}
+
+ /* Don't support asymmetric configurations today */
+ WARN_ON(banks != 0 && b != banks);
+ banks = b;
+ if (!bank) {
+ bank = kmalloc(banks * sizeof(u64), GFP_KERNEL);
+ if (!bank)
+ return -ENOMEM;
+ memset(bank, 0xff, banks * sizeof(u64));
+ }
+
/* Use accurate RIP reporting if available. */
if ((cap & (1<<9)) && ((cap >> 16) & 0xff) >= 9)
rip_msr = MSR_IA32_MCG_EIP;
- /* Log the machine checks left over from the previous reset.
- This also clears all registers */
- do_machine_check(NULL, mce_bootlog ? -1 : -2);
+ return 0;
+}
+
+static void mce_init(void *dummy)
+{
+ u64 cap;
+ int i;
+ mce_banks_t all_banks;
+
+ /*
+ * Log the machine checks left over from the previous reset.
+ */
+ bitmap_fill(all_banks, MAX_NR_BANKS);
+ machine_check_poll(MCP_UC, &all_banks);
set_in_cr4(X86_CR4_MCE);
+ rdmsrl(MSR_IA32_MCG_CAP, cap);
if (cap & MCG_CTL_P)
wrmsr(MSR_IA32_MCG_CTL, 0xffffffff, 0xffffffff);
for (i = 0; i < banks; i++) {
- if (i < NR_SYSFS_BANKS)
- wrmsrl(MSR_IA32_MC0_CTL+4*i, bank[i]);
- else
- wrmsrl(MSR_IA32_MC0_CTL+4*i, ~0UL);
-
+ wrmsrl(MSR_IA32_MC0_CTL+4*i, bank[i]);
wrmsrl(MSR_IA32_MC0_STATUS+4*i, 0);
}
}
/* Add per CPU specific workarounds here */
-static void __cpuinit mce_cpu_quirks(struct cpuinfo_x86 *c)
+static void mce_cpu_quirks(struct cpuinfo_x86 *c)
{
/* This should be disabled by the BIOS, but isn't always */
if (c->x86_vendor == X86_VENDOR_AMD) {
- if(c->x86 == 15)
+ if (c->x86 == 15 && banks > 4)
/* disable GART TBL walk error reporting, which trips off
incorrectly with the IOMMU & 3ware & Cerberus. */
- clear_bit(10, &bank[4]);
+ clear_bit(10, (unsigned long *)&bank[4]);
if(c->x86 <= 17 && mce_bootlog < 0)
/* Lots of broken BIOS around that don't clear them
by default and leave crap in there. Don't log. */
@@ -504,20 +629,38 @@ static void mce_cpu_features(struct cpuinfo_x86 *c)
}
}
+static void mce_init_timer(void)
+{
+ struct timer_list *t = &__get_cpu_var(mce_timer);
+
+ /* data race harmless because everyone sets to the same value */
+ if (!next_interval)
+ next_interval = check_interval * HZ;
+ if (!next_interval)
+ return;
+ setup_timer(t, mcheck_timer, smp_processor_id());
+ t->expires = round_jiffies(jiffies + next_interval);
+ add_timer(t);
+}
+
/*
* Called for each booted CPU to set up machine checks.
* Must be called with preempt off.
*/
void __cpuinit mcheck_init(struct cpuinfo_x86 *c)
{
- mce_cpu_quirks(c);
+ if (!mce_available(c))
+ return;
- if (mce_dont_init ||
- !mce_available(c))
+ if (mce_cap_init() < 0) {
+ mce_dont_init = 1;
return;
+ }
+ mce_cpu_quirks(c);
mce_init(NULL);
mce_cpu_features(c);
+ mce_init_timer();
}
/*
@@ -573,7 +716,7 @@ static ssize_t mce_read(struct file *filp, char __user *ubuf, size_t usize,
{
unsigned long *cpu_tsc;
static DEFINE_MUTEX(mce_read_mutex);
- unsigned next;
+ unsigned prev, next;
char __user *buf = ubuf;
int i, err;
@@ -592,25 +735,32 @@ static ssize_t mce_read(struct file *filp, char __user *ubuf, size_t usize,
}
err = 0;
- for (i = 0; i < next; i++) {
- unsigned long start = jiffies;
-
- while (!mcelog.entry[i].finished) {
- if (time_after_eq(jiffies, start + 2)) {
- memset(mcelog.entry + i,0, sizeof(struct mce));
- goto timeout;
+ prev = 0;
+ do {
+ for (i = prev; i < next; i++) {
+ unsigned long start = jiffies;
+
+ while (!mcelog.entry[i].finished) {
+ if (time_after_eq(jiffies, start + 2)) {
+ memset(mcelog.entry + i, 0,
+ sizeof(struct mce));
+ goto timeout;
+ }
+ cpu_relax();
}
- cpu_relax();
+ smp_rmb();
+ err |= copy_to_user(buf, mcelog.entry + i,
+ sizeof(struct mce));
+ buf += sizeof(struct mce);
+timeout:
+ ;
}
- smp_rmb();
- err |= copy_to_user(buf, mcelog.entry + i, sizeof(struct mce));
- buf += sizeof(struct mce);
- timeout:
- ;
- }
- memset(mcelog.entry, 0, next * sizeof(struct mce));
- mcelog.next = 0;
+ memset(mcelog.entry + prev, 0,
+ (next - prev) * sizeof(struct mce));
+ prev = next;
+ next = cmpxchg(&mcelog.next, prev, 0);
+ } while (next != prev);
synchronize_sched();
@@ -680,20 +830,6 @@ static struct miscdevice mce_log_device = {
&mce_chrdev_ops,
};
-static unsigned long old_cr4 __initdata;
-
-void __init stop_mce(void)
-{
- old_cr4 = read_cr4();
- clear_in_cr4(X86_CR4_MCE);
-}
-
-void __init restart_mce(void)
-{
- if (old_cr4 & X86_CR4_MCE)
- set_in_cr4(X86_CR4_MCE);
-}
-
/*
* Old style boot options parsing. Only for compatibility.
*/
@@ -703,8 +839,7 @@ static int __init mcheck_disable(char *str)
return 1;
}
-/* mce=off disables machine check. Note you can re-enable it later
- using sysfs.
+/* mce=off disables machine check.
mce=TOLERANCELEVEL (number, see above)
mce=bootlog Log MCEs from before booting. Disabled by default on AMD.
mce=nobootlog Don't log MCEs from before booting. */
@@ -728,6 +863,29 @@ __setup("mce=", mcheck_enable);
* Sysfs support
*/
+/*
+ * Disable machine checks on suspend and shutdown. We can't really handle
+ * them later.
+ */
+static int mce_disable(void)
+{
+ int i;
+
+ for (i = 0; i < banks; i++)
+ wrmsrl(MSR_IA32_MC0_CTL + i*4, 0);
+ return 0;
+}
+
+static int mce_suspend(struct sys_device *dev, pm_message_t state)
+{
+ return mce_disable();
+}
+
+static int mce_shutdown(struct sys_device *dev)
+{
+ return mce_disable();
+}
+
/* On resume clear all MCE state. Don't want to see leftovers from the BIOS.
Only one CPU is active at this time, the others get readded later using
CPU hotplug. */
@@ -738,20 +896,24 @@ static int mce_resume(struct sys_device *dev)
return 0;
}
+static void mce_cpu_restart(void *data)
+{
+ del_timer_sync(&__get_cpu_var(mce_timer));
+ if (mce_available(&current_cpu_data))
+ mce_init(NULL);
+ mce_init_timer();
+}
+
/* Reinit MCEs after user configuration changes */
static void mce_restart(void)
{
- if (next_interval)
- cancel_delayed_work(&mcheck_work);
- /* Timer race is harmless here */
- on_each_cpu(mce_init, NULL, 1);
next_interval = check_interval * HZ;
- if (next_interval)
- schedule_delayed_work(&mcheck_work,
- round_jiffies_relative(next_interval));
+ on_each_cpu(mce_cpu_restart, NULL, 1);
}
static struct sysdev_class mce_sysclass = {
+ .suspend = mce_suspend,
+ .shutdown = mce_shutdown,
.resume = mce_resume,
.name = "machinecheck",
};
@@ -778,16 +940,26 @@ void (*threshold_cpu_callback)(unsigned long action, unsigned int cpu) __cpuinit
} \
static SYSDEV_ATTR(name, 0644, show_ ## name, set_ ## name);
-/*
- * TBD should generate these dynamically based on number of available banks.
- * Have only 6 contol banks in /sysfs until then.
- */
-ACCESSOR(bank0ctl,bank[0],mce_restart())
-ACCESSOR(bank1ctl,bank[1],mce_restart())
-ACCESSOR(bank2ctl,bank[2],mce_restart())
-ACCESSOR(bank3ctl,bank[3],mce_restart())
-ACCESSOR(bank4ctl,bank[4],mce_restart())
-ACCESSOR(bank5ctl,bank[5],mce_restart())
+static struct sysdev_attribute *bank_attrs;
+
+static ssize_t show_bank(struct sys_device *s, struct sysdev_attribute *attr,
+ char *buf)
+{
+ u64 b = bank[attr - bank_attrs];
+ return sprintf(buf, "%llx\n", b);
+}
+
+static ssize_t set_bank(struct sys_device *s, struct sysdev_attribute *attr,
+ const char *buf, size_t siz)
+{
+ char *end;
+ u64 new = simple_strtoull(buf, &end, 0);
+ if (end == buf)
+ return -EINVAL;
+ bank[attr - bank_attrs] = new;
+ mce_restart();
+ return end-buf;
+}
static ssize_t show_trigger(struct sys_device *s, struct sysdev_attribute *attr,
char *buf)
@@ -814,13 +986,11 @@ static SYSDEV_ATTR(trigger, 0644, show_trigger, set_trigger);
static SYSDEV_INT_ATTR(tolerant, 0644, tolerant);
ACCESSOR(check_interval,check_interval,mce_restart())
static struct sysdev_attribute *mce_attributes[] = {
- &attr_bank0ctl, &attr_bank1ctl, &attr_bank2ctl,
- &attr_bank3ctl, &attr_bank4ctl, &attr_bank5ctl,
&attr_tolerant.attr, &attr_check_interval, &attr_trigger,
NULL
};
-static cpumask_t mce_device_initialized = CPU_MASK_NONE;
+static cpumask_var_t mce_device_initialized;
/* Per cpu sysdev init. All of the cpus still share the same ctl bank */
static __cpuinit int mce_create_device(unsigned int cpu)
@@ -845,11 +1015,22 @@ static __cpuinit int mce_create_device(unsigned int cpu)
if (err)
goto error;
}
- cpu_set(cpu, mce_device_initialized);
+ for (i = 0; i < banks; i++) {
+ err = sysdev_create_file(&per_cpu(device_mce, cpu),
+ &bank_attrs[i]);
+ if (err)
+ goto error2;
+ }
+ cpumask_set_cpu(cpu, mce_device_initialized);
return 0;
+error2:
+ while (--i >= 0) {
+ sysdev_remove_file(&per_cpu(device_mce, cpu),
+ &bank_attrs[i]);
+ }
error:
- while (i--) {
+ while (--i >= 0) {
sysdev_remove_file(&per_cpu(device_mce,cpu),
mce_attributes[i]);
}
@@ -862,14 +1043,44 @@ static __cpuinit void mce_remove_device(unsigned int cpu)
{
int i;
- if (!cpu_isset(cpu, mce_device_initialized))
+ if (!cpumask_test_cpu(cpu, mce_device_initialized))
return;
for (i = 0; mce_attributes[i]; i++)
sysdev_remove_file(&per_cpu(device_mce,cpu),
mce_attributes[i]);
+ for (i = 0; i < banks; i++)
+ sysdev_remove_file(&per_cpu(device_mce, cpu),
+ &bank_attrs[i]);
sysdev_unregister(&per_cpu(device_mce,cpu));
- cpu_clear(cpu, mce_device_initialized);
+ cpumask_clear_cpu(cpu, mce_device_initialized);
+}
+
+/* Make sure there are no machine checks on offlined CPUs. */
+static void mce_disable_cpu(void *h)
+{
+ int i;
+ unsigned long action = *(unsigned long *)h;
+
+ if (!mce_available(&current_cpu_data))
+ return;
+ if (!(action & CPU_TASKS_FROZEN))
+ cmci_clear();
+ for (i = 0; i < banks; i++)
+ wrmsrl(MSR_IA32_MC0_CTL + i*4, 0);
+}
+
+static void mce_reenable_cpu(void *h)
+{
+ int i;
+ unsigned long action = *(unsigned long *)h;
+
+ if (!mce_available(&current_cpu_data))
+ return;
+ if (!(action & CPU_TASKS_FROZEN))
+ cmci_reenable();
+ for (i = 0; i < banks; i++)
+ wrmsrl(MSR_IA32_MC0_CTL + i*4, bank[i]);
}
/* Get notified when a cpu comes on/off. Be hotplug friendly. */
@@ -877,6 +1088,7 @@ static int __cpuinit mce_cpu_callback(struct notifier_block *nfb,
unsigned long action, void *hcpu)
{
unsigned int cpu = (unsigned long)hcpu;
+ struct timer_list *t = &per_cpu(mce_timer, cpu);
switch (action) {
case CPU_ONLINE:
@@ -891,6 +1103,21 @@ static int __cpuinit mce_cpu_callback(struct notifier_block *nfb,
threshold_cpu_callback(action, cpu);
mce_remove_device(cpu);
break;
+ case CPU_DOWN_PREPARE:
+ case CPU_DOWN_PREPARE_FROZEN:
+ del_timer_sync(t);
+ smp_call_function_single(cpu, mce_disable_cpu, &action, 1);
+ break;
+ case CPU_DOWN_FAILED:
+ case CPU_DOWN_FAILED_FROZEN:
+ t->expires = round_jiffies(jiffies + next_interval);
+ add_timer_on(t, cpu);
+ smp_call_function_single(cpu, mce_reenable_cpu, &action, 1);
+ break;
+ case CPU_POST_DEAD:
+ /* intentionally ignoring frozen here */
+ cmci_rediscover(cpu);
+ break;
}
return NOTIFY_OK;
}
@@ -899,6 +1126,34 @@ static struct notifier_block mce_cpu_notifier __cpuinitdata = {
.notifier_call = mce_cpu_callback,
};
+static __init int mce_init_banks(void)
+{
+ int i;
+
+ bank_attrs = kzalloc(sizeof(struct sysdev_attribute) * banks,
+ GFP_KERNEL);
+ if (!bank_attrs)
+ return -ENOMEM;
+
+ for (i = 0; i < banks; i++) {
+ struct sysdev_attribute *a = &bank_attrs[i];
+ a->attr.name = kasprintf(GFP_KERNEL, "bank%d", i);
+ if (!a->attr.name)
+ goto nomem;
+ a->attr.mode = 0644;
+ a->show = show_bank;
+ a->store = set_bank;
+ }
+ return 0;
+
+nomem:
+ while (--i >= 0)
+ kfree(bank_attrs[i].attr.name);
+ kfree(bank_attrs);
+ bank_attrs = NULL;
+ return -ENOMEM;
+}
+
static __init int mce_init_device(void)
{
int err;
@@ -906,6 +1161,13 @@ static __init int mce_init_device(void)
if (!mce_available(&boot_cpu_data))
return -EIO;
+
+ alloc_cpumask_var(&mce_device_initialized, GFP_KERNEL);
+
+ err = mce_init_banks();
+ if (err)
+ return err;
+
err = sysdev_class_register(&mce_sysclass);
if (err)
return err;
diff --git a/arch/x86/kernel/cpu/mcheck/mce_amd_64.c b/arch/x86/kernel/cpu/mcheck/mce_amd_64.c
index 9817506dd469..56dde9c4bc96 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_amd_64.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_amd_64.c
@@ -79,6 +79,8 @@ static unsigned char shared_bank[NR_BANKS] = {
static DEFINE_PER_CPU(unsigned char, bank_map); /* see which banks are on */
+static void amd_threshold_interrupt(void);
+
/*
* CPU Initialization
*/
@@ -90,7 +92,8 @@ struct thresh_restart {
};
/* must be called with correct cpu affinity */
-static long threshold_restart_bank(void *_tr)
+/* Called via smp_call_function_single() */
+static void threshold_restart_bank(void *_tr)
{
struct thresh_restart *tr = _tr;
u32 mci_misc_hi, mci_misc_lo;
@@ -117,7 +120,6 @@ static long threshold_restart_bank(void *_tr)
mci_misc_hi |= MASK_COUNT_EN_HI;
wrmsr(tr->b->address, mci_misc_lo, mci_misc_hi);
- return 0;
}
/* cpu init entry point, called from mce.c with preempt off */
@@ -174,6 +176,8 @@ void mce_amd_feature_init(struct cpuinfo_x86 *c)
tr.reset = 0;
tr.old_limit = 0;
threshold_restart_bank(&tr);
+
+ mce_threshold_vector = amd_threshold_interrupt;
}
}
}
@@ -187,19 +191,13 @@ void mce_amd_feature_init(struct cpuinfo_x86 *c)
* the interrupt goes off when error_count reaches threshold_limit.
* the handler will simply log mcelog w/ software defined bank number.
*/
-asmlinkage void mce_threshold_interrupt(void)
+static void amd_threshold_interrupt(void)
{
unsigned int bank, block;
struct mce m;
u32 low = 0, high = 0, address = 0;
- ack_APIC_irq();
- exit_idle();
- irq_enter();
-
- memset(&m, 0, sizeof(m));
- rdtscll(m.tsc);
- m.cpu = smp_processor_id();
+ mce_setup(&m);
/* assume first bank caused it */
for (bank = 0; bank < NR_BANKS; ++bank) {
@@ -233,7 +231,8 @@ asmlinkage void mce_threshold_interrupt(void)
/* Log the machine check that caused the threshold
event. */
- do_machine_check(NULL, 0);
+ machine_check_poll(MCP_TIMESTAMP,
+ &__get_cpu_var(mce_poll_banks));
if (high & MASK_OVERFLOW_HI) {
rdmsrl(address, m.misc);
@@ -243,13 +242,10 @@ asmlinkage void mce_threshold_interrupt(void)
+ bank * NR_BLOCKS
+ block;
mce_log(&m);
- goto out;
+ return;
}
}
}
-out:
- inc_irq_stat(irq_threshold_count);
- irq_exit();
}
/*
@@ -283,7 +279,7 @@ static ssize_t store_interrupt_enable(struct threshold_block *b,
tr.b = b;
tr.reset = 0;
tr.old_limit = 0;
- work_on_cpu(b->cpu, threshold_restart_bank, &tr);
+ smp_call_function_single(b->cpu, threshold_restart_bank, &tr, 1);
return end - buf;
}
@@ -305,23 +301,32 @@ static ssize_t store_threshold_limit(struct threshold_block *b,
tr.b = b;
tr.reset = 0;
- work_on_cpu(b->cpu, threshold_restart_bank, &tr);
+ smp_call_function_single(b->cpu, threshold_restart_bank, &tr, 1);
return end - buf;
}
-static long local_error_count(void *_b)
+struct threshold_block_cross_cpu {
+ struct threshold_block *tb;
+ long retval;
+};
+
+static void local_error_count_handler(void *_tbcc)
{
- struct threshold_block *b = _b;
+ struct threshold_block_cross_cpu *tbcc = _tbcc;
+ struct threshold_block *b = tbcc->tb;
u32 low, high;
rdmsr(b->address, low, high);
- return (high & 0xFFF) - (THRESHOLD_MAX - b->threshold_limit);
+ tbcc->retval = (high & 0xFFF) - (THRESHOLD_MAX - b->threshold_limit);
}
static ssize_t show_error_count(struct threshold_block *b, char *buf)
{
- return sprintf(buf, "%lx\n", work_on_cpu(b->cpu, local_error_count, b));
+ struct threshold_block_cross_cpu tbcc = { .tb = b, };
+
+ smp_call_function_single(b->cpu, local_error_count_handler, &tbcc, 1);
+ return sprintf(buf, "%lx\n", tbcc.retval);
}
static ssize_t store_error_count(struct threshold_block *b,
@@ -329,7 +334,7 @@ static ssize_t store_error_count(struct threshold_block *b,
{
struct thresh_restart tr = { .b = b, .reset = 1, .old_limit = 0 };
- work_on_cpu(b->cpu, threshold_restart_bank, &tr);
+ smp_call_function_single(b->cpu, threshold_restart_bank, &tr, 1);
return 1;
}
@@ -398,7 +403,7 @@ static __cpuinit int allocate_threshold_blocks(unsigned int cpu,
if ((bank >= NR_BANKS) || (block >= NR_BLOCKS))
return 0;
- if (rdmsr_safe(address, &low, &high))
+ if (rdmsr_safe_on_cpu(cpu, address, &low, &high))
return 0;
if (!(high & MASK_VALID_HI)) {
@@ -462,12 +467,11 @@ out_free:
return err;
}
-static __cpuinit long local_allocate_threshold_blocks(void *_bank)
+static __cpuinit long
+local_allocate_threshold_blocks(int cpu, unsigned int bank)
{
- unsigned int *bank = _bank;
-
- return allocate_threshold_blocks(smp_processor_id(), *bank, 0,
- MSR_IA32_MC0_MISC + *bank * 4);
+ return allocate_threshold_blocks(cpu, bank, 0,
+ MSR_IA32_MC0_MISC + bank * 4);
}
/* symlinks sibling shared banks to first core. first core owns dir/files. */
@@ -481,7 +485,7 @@ static __cpuinit int threshold_create_bank(unsigned int cpu, unsigned int bank)
#ifdef CONFIG_SMP
if (cpu_data(cpu).cpu_core_id && shared_bank[bank]) { /* symlink */
- i = cpumask_first(&per_cpu(cpu_core_map, cpu));
+ i = cpumask_first(cpu_core_mask(cpu));
/* first core not up yet */
if (cpu_data(i).cpu_core_id)
@@ -501,7 +505,7 @@ static __cpuinit int threshold_create_bank(unsigned int cpu, unsigned int bank)
if (err)
goto out;
- cpumask_copy(b->cpus, &per_cpu(cpu_core_map, cpu));
+ cpumask_copy(b->cpus, cpu_core_mask(cpu));
per_cpu(threshold_banks, cpu)[bank] = b;
goto out;
}
@@ -525,12 +529,12 @@ static __cpuinit int threshold_create_bank(unsigned int cpu, unsigned int bank)
#ifndef CONFIG_SMP
cpumask_setall(b->cpus);
#else
- cpumask_copy(b->cpus, &per_cpu(cpu_core_map, cpu));
+ cpumask_copy(b->cpus, cpu_core_mask(cpu));
#endif
per_cpu(threshold_banks, cpu)[bank] = b;
- err = work_on_cpu(cpu, local_allocate_threshold_blocks, &bank);
+ err = local_allocate_threshold_blocks(cpu, bank);
if (err)
goto out_free;
diff --git a/arch/x86/kernel/cpu/mcheck/mce_intel_64.c b/arch/x86/kernel/cpu/mcheck/mce_intel_64.c
index aa5e287c98e0..d6b72df89d69 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_intel_64.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_intel_64.c
@@ -1,6 +1,8 @@
/*
* Intel specific MCE features.
* Copyright 2004 Zwane Mwaikambo <zwane@linuxpower.ca>
+ * Copyright (C) 2008, 2009 Intel Corporation
+ * Author: Andi Kleen
*/
#include <linux/init.h>
@@ -13,6 +15,7 @@
#include <asm/hw_irq.h>
#include <asm/idle.h>
#include <asm/therm_throt.h>
+#include <asm/apic.h>
asmlinkage void smp_thermal_interrupt(void)
{
@@ -25,7 +28,7 @@ asmlinkage void smp_thermal_interrupt(void)
rdmsrl(MSR_IA32_THERM_STATUS, msr_val);
if (therm_throt_process(msr_val & 1))
- mce_log_therm_throt_event(smp_processor_id(), msr_val);
+ mce_log_therm_throt_event(msr_val);
inc_irq_stat(irq_thermal_count);
irq_exit();
@@ -85,7 +88,209 @@ static void intel_init_thermal(struct cpuinfo_x86 *c)
return;
}
+/*
+ * Support for Intel Correct Machine Check Interrupts. This allows
+ * the CPU to raise an interrupt when a corrected machine check happened.
+ * Normally we pick those up using a regular polling timer.
+ * Also supports reliable discovery of shared banks.
+ */
+
+static DEFINE_PER_CPU(mce_banks_t, mce_banks_owned);
+
+/*
+ * cmci_discover_lock protects against parallel discovery attempts
+ * which could race against each other.
+ */
+static DEFINE_SPINLOCK(cmci_discover_lock);
+
+#define CMCI_THRESHOLD 1
+
+static int cmci_supported(int *banks)
+{
+ u64 cap;
+
+ /*
+ * Vendor check is not strictly needed, but the initial
+ * initialization is vendor keyed and this
+ * makes sure none of the backdoors are entered otherwise.
+ */
+ if (boot_cpu_data.x86_vendor != X86_VENDOR_INTEL)
+ return 0;
+ if (!cpu_has_apic || lapic_get_maxlvt() < 6)
+ return 0;
+ rdmsrl(MSR_IA32_MCG_CAP, cap);
+ *banks = min_t(unsigned, MAX_NR_BANKS, cap & 0xff);
+ return !!(cap & MCG_CMCI_P);
+}
+
+/*
+ * The interrupt handler. This is called on every event.
+ * Just call the poller directly to log any events.
+ * This could in theory increase the threshold under high load,
+ * but doesn't for now.
+ */
+static void intel_threshold_interrupt(void)
+{
+ machine_check_poll(MCP_TIMESTAMP, &__get_cpu_var(mce_banks_owned));
+ mce_notify_user();
+}
+
+static void print_update(char *type, int *hdr, int num)
+{
+ if (*hdr == 0)
+ printk(KERN_INFO "CPU %d MCA banks", smp_processor_id());
+ *hdr = 1;
+ printk(KERN_CONT " %s:%d", type, num);
+}
+
+/*
+ * Enable CMCI (Corrected Machine Check Interrupt) for available MCE banks
+ * on this CPU. Use the algorithm recommended in the SDM to discover shared
+ * banks.
+ */
+static void cmci_discover(int banks, int boot)
+{
+ unsigned long *owned = (void *)&__get_cpu_var(mce_banks_owned);
+ int hdr = 0;
+ int i;
+
+ spin_lock(&cmci_discover_lock);
+ for (i = 0; i < banks; i++) {
+ u64 val;
+
+ if (test_bit(i, owned))
+ continue;
+
+ rdmsrl(MSR_IA32_MC0_CTL2 + i, val);
+
+ /* Already owned by someone else? */
+ if (val & CMCI_EN) {
+ if (test_and_clear_bit(i, owned) || boot)
+ print_update("SHD", &hdr, i);
+ __clear_bit(i, __get_cpu_var(mce_poll_banks));
+ continue;
+ }
+
+ val |= CMCI_EN | CMCI_THRESHOLD;
+ wrmsrl(MSR_IA32_MC0_CTL2 + i, val);
+ rdmsrl(MSR_IA32_MC0_CTL2 + i, val);
+
+ /* Did the enable bit stick? -- the bank supports CMCI */
+ if (val & CMCI_EN) {
+ if (!test_and_set_bit(i, owned) || boot)
+ print_update("CMCI", &hdr, i);
+ __clear_bit(i, __get_cpu_var(mce_poll_banks));
+ } else {
+ WARN_ON(!test_bit(i, __get_cpu_var(mce_poll_banks)));
+ }
+ }
+ spin_unlock(&cmci_discover_lock);
+ if (hdr)
+ printk(KERN_CONT "\n");
+}
+
+/*
+ * Just in case we missed an event during initialization check
+ * all the CMCI owned banks.
+ */
+void cmci_recheck(void)
+{
+ unsigned long flags;
+ int banks;
+
+ if (!mce_available(&current_cpu_data) || !cmci_supported(&banks))
+ return;
+ local_irq_save(flags);
+ machine_check_poll(MCP_TIMESTAMP, &__get_cpu_var(mce_banks_owned));
+ local_irq_restore(flags);
+}
+
+/*
+ * Disable CMCI on this CPU for all banks it owns when it goes down.
+ * This allows other CPUs to claim the banks on rediscovery.
+ */
+void cmci_clear(void)
+{
+ int i;
+ int banks;
+ u64 val;
+
+ if (!cmci_supported(&banks))
+ return;
+ spin_lock(&cmci_discover_lock);
+ for (i = 0; i < banks; i++) {
+ if (!test_bit(i, __get_cpu_var(mce_banks_owned)))
+ continue;
+ /* Disable CMCI */
+ rdmsrl(MSR_IA32_MC0_CTL2 + i, val);
+ val &= ~(CMCI_EN|CMCI_THRESHOLD_MASK);
+ wrmsrl(MSR_IA32_MC0_CTL2 + i, val);
+ __clear_bit(i, __get_cpu_var(mce_banks_owned));
+ }
+ spin_unlock(&cmci_discover_lock);
+}
+
+/*
+ * After a CPU went down cycle through all the others and rediscover
+ * Must run in process context.
+ */
+void cmci_rediscover(int dying)
+{
+ int banks;
+ int cpu;
+ cpumask_var_t old;
+
+ if (!cmci_supported(&banks))
+ return;
+ if (!alloc_cpumask_var(&old, GFP_KERNEL))
+ return;
+ cpumask_copy(old, &current->cpus_allowed);
+
+ for_each_online_cpu (cpu) {
+ if (cpu == dying)
+ continue;
+ if (set_cpus_allowed_ptr(current, cpumask_of(cpu)))
+ continue;
+ /* Recheck banks in case CPUs don't all have the same */
+ if (cmci_supported(&banks))
+ cmci_discover(banks, 0);
+ }
+
+ set_cpus_allowed_ptr(current, old);
+ free_cpumask_var(old);
+}
+
+/*
+ * Reenable CMCI on this CPU in case a CPU down failed.
+ */
+void cmci_reenable(void)
+{
+ int banks;
+ if (cmci_supported(&banks))
+ cmci_discover(banks, 0);
+}
+
+static void intel_init_cmci(void)
+{
+ int banks;
+
+ if (!cmci_supported(&banks))
+ return;
+
+ mce_threshold_vector = intel_threshold_interrupt;
+ cmci_discover(banks, 1);
+ /*
+ * For CPU #0 this runs with still disabled APIC, but that's
+ * ok because only the vector is set up. We still do another
+ * check for the banks later for CPU #0 just to make sure
+ * to not miss any events.
+ */
+ apic_write(APIC_LVTCMCI, THRESHOLD_APIC_VECTOR|APIC_DM_FIXED);
+ cmci_recheck();
+}
+
void mce_intel_feature_init(struct cpuinfo_x86 *c)
{
intel_init_thermal(c);
+ intel_init_cmci();
}
diff --git a/arch/x86/kernel/cpu/mcheck/threshold.c b/arch/x86/kernel/cpu/mcheck/threshold.c
new file mode 100644
index 000000000000..23ee9e730f78
--- /dev/null
+++ b/arch/x86/kernel/cpu/mcheck/threshold.c
@@ -0,0 +1,29 @@
+/*
+ * Common corrected MCE threshold handler code:
+ */
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+
+#include <asm/irq_vectors.h>
+#include <asm/apic.h>
+#include <asm/idle.h>
+#include <asm/mce.h>
+
+static void default_threshold_interrupt(void)
+{
+ printk(KERN_ERR "Unexpected threshold interrupt at vector %x\n",
+ THRESHOLD_APIC_VECTOR);
+}
+
+void (*mce_threshold_vector)(void) = default_threshold_interrupt;
+
+asmlinkage void mce_threshold_interrupt(void)
+{
+ exit_idle();
+ irq_enter();
+ inc_irq_stat(irq_threshold_count);
+ mce_threshold_vector();
+ irq_exit();
+ /* Ack only at the end to avoid potential reentry */
+ ack_APIC_irq();
+}
diff --git a/arch/x86/kernel/cpu/mtrr/Makefile b/arch/x86/kernel/cpu/mtrr/Makefile
index 191fc0533649..f4361b56f8e9 100644
--- a/arch/x86/kernel/cpu/mtrr/Makefile
+++ b/arch/x86/kernel/cpu/mtrr/Makefile
@@ -1,3 +1,3 @@
-obj-y := main.o if.o generic.o state.o
+obj-y := main.o if.o generic.o state.o cleanup.o
obj-$(CONFIG_X86_32) += amd.o cyrix.o centaur.o
diff --git a/arch/x86/kernel/cpu/mtrr/cleanup.c b/arch/x86/kernel/cpu/mtrr/cleanup.c
new file mode 100644
index 000000000000..ce0fe4b5c04f
--- /dev/null
+++ b/arch/x86/kernel/cpu/mtrr/cleanup.c
@@ -0,0 +1,1101 @@
+/* MTRR (Memory Type Range Register) cleanup
+
+ Copyright (C) 2009 Yinghai Lu
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public
+ License as published by the Free Software Foundation; either
+ version 2 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with this library; if not, write to the Free
+ Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/smp.h>
+#include <linux/cpu.h>
+#include <linux/mutex.h>
+#include <linux/sort.h>
+
+#include <asm/e820.h>
+#include <asm/mtrr.h>
+#include <asm/uaccess.h>
+#include <asm/processor.h>
+#include <asm/msr.h>
+#include <asm/kvm_para.h>
+#include "mtrr.h"
+
+/* should be related to MTRR_VAR_RANGES nums */
+#define RANGE_NUM 256
+
+struct res_range {
+ unsigned long start;
+ unsigned long end;
+};
+
+static int __init
+add_range(struct res_range *range, int nr_range, unsigned long start,
+ unsigned long end)
+{
+ /* out of slots */
+ if (nr_range >= RANGE_NUM)
+ return nr_range;
+
+ range[nr_range].start = start;
+ range[nr_range].end = end;
+
+ nr_range++;
+
+ return nr_range;
+}
+
+static int __init
+add_range_with_merge(struct res_range *range, int nr_range, unsigned long start,
+ unsigned long end)
+{
+ int i;
+
+ /* try to merge it with old one */
+ for (i = 0; i < nr_range; i++) {
+ unsigned long final_start, final_end;
+ unsigned long common_start, common_end;
+
+ if (!range[i].end)
+ continue;
+
+ common_start = max(range[i].start, start);
+ common_end = min(range[i].end, end);
+ if (common_start > common_end + 1)
+ continue;
+
+ final_start = min(range[i].start, start);
+ final_end = max(range[i].end, end);
+
+ range[i].start = final_start;
+ range[i].end = final_end;
+ return nr_range;
+ }
+
+ /* need to add that */
+ return add_range(range, nr_range, start, end);
+}
+
+static void __init
+subtract_range(struct res_range *range, unsigned long start, unsigned long end)
+{
+ int i, j;
+
+ for (j = 0; j < RANGE_NUM; j++) {
+ if (!range[j].end)
+ continue;
+
+ if (start <= range[j].start && end >= range[j].end) {
+ range[j].start = 0;
+ range[j].end = 0;
+ continue;
+ }
+
+ if (start <= range[j].start && end < range[j].end &&
+ range[j].start < end + 1) {
+ range[j].start = end + 1;
+ continue;
+ }
+
+
+ if (start > range[j].start && end >= range[j].end &&
+ range[j].end > start - 1) {
+ range[j].end = start - 1;
+ continue;
+ }
+
+ if (start > range[j].start && end < range[j].end) {
+ /* find the new spare */
+ for (i = 0; i < RANGE_NUM; i++) {
+ if (range[i].end == 0)
+ break;
+ }
+ if (i < RANGE_NUM) {
+ range[i].end = range[j].end;
+ range[i].start = end + 1;
+ } else {
+ printk(KERN_ERR "run of slot in ranges\n");
+ }
+ range[j].end = start - 1;
+ continue;
+ }
+ }
+}
+
+static int __init cmp_range(const void *x1, const void *x2)
+{
+ const struct res_range *r1 = x1;
+ const struct res_range *r2 = x2;
+ long start1, start2;
+
+ start1 = r1->start;
+ start2 = r2->start;
+
+ return start1 - start2;
+}
+
+struct var_mtrr_range_state {
+ unsigned long base_pfn;
+ unsigned long size_pfn;
+ mtrr_type type;
+};
+
+static struct var_mtrr_range_state __initdata range_state[RANGE_NUM];
+static int __initdata debug_print;
+
+static int __init
+x86_get_mtrr_mem_range(struct res_range *range, int nr_range,
+ unsigned long extra_remove_base,
+ unsigned long extra_remove_size)
+{
+ unsigned long base, size;
+ mtrr_type type;
+ int i;
+
+ for (i = 0; i < num_var_ranges; i++) {
+ type = range_state[i].type;
+ if (type != MTRR_TYPE_WRBACK)
+ continue;
+ base = range_state[i].base_pfn;
+ size = range_state[i].size_pfn;
+ nr_range = add_range_with_merge(range, nr_range, base,
+ base + size - 1);
+ }
+ if (debug_print) {
+ printk(KERN_DEBUG "After WB checking\n");
+ for (i = 0; i < nr_range; i++)
+ printk(KERN_DEBUG "MTRR MAP PFN: %016lx - %016lx\n",
+ range[i].start, range[i].end + 1);
+ }
+
+ /* take out UC ranges */
+ for (i = 0; i < num_var_ranges; i++) {
+ type = range_state[i].type;
+ if (type != MTRR_TYPE_UNCACHABLE &&
+ type != MTRR_TYPE_WRPROT)
+ continue;
+ size = range_state[i].size_pfn;
+ if (!size)
+ continue;
+ base = range_state[i].base_pfn;
+ if (base < (1<<(20-PAGE_SHIFT)) && mtrr_state.have_fixed &&
+ (mtrr_state.enabled & 1)) {
+ /* Var MTRR contains UC entry below 1M? Skip it: */
+ printk(KERN_WARNING "WARNING: BIOS bug: VAR MTRR %d "
+ "contains strange UC entry under 1M, check "
+ "with your system vendor!\n", i);
+ if (base + size <= (1<<(20-PAGE_SHIFT)))
+ continue;
+ size -= (1<<(20-PAGE_SHIFT)) - base;
+ base = 1<<(20-PAGE_SHIFT);
+ }
+ subtract_range(range, base, base + size - 1);
+ }
+ if (extra_remove_size)
+ subtract_range(range, extra_remove_base,
+ extra_remove_base + extra_remove_size - 1);
+
+ /* get new range num */
+ nr_range = 0;
+ for (i = 0; i < RANGE_NUM; i++) {
+ if (!range[i].end)
+ continue;
+ nr_range++;
+ }
+ if (debug_print) {
+ printk(KERN_DEBUG "After UC checking\n");
+ for (i = 0; i < nr_range; i++)
+ printk(KERN_DEBUG "MTRR MAP PFN: %016lx - %016lx\n",
+ range[i].start, range[i].end + 1);
+ }
+
+ /* sort the ranges */
+ sort(range, nr_range, sizeof(struct res_range), cmp_range, NULL);
+ if (debug_print) {
+ printk(KERN_DEBUG "After sorting\n");
+ for (i = 0; i < nr_range; i++)
+ printk(KERN_DEBUG "MTRR MAP PFN: %016lx - %016lx\n",
+ range[i].start, range[i].end + 1);
+ }
+
+ /* clear those is not used */
+ for (i = nr_range; i < RANGE_NUM; i++)
+ memset(&range[i], 0, sizeof(range[i]));
+
+ return nr_range;
+}
+
+static struct res_range __initdata range[RANGE_NUM];
+static int __initdata nr_range;
+
+#ifdef CONFIG_MTRR_SANITIZER
+
+static unsigned long __init sum_ranges(struct res_range *range, int nr_range)
+{
+ unsigned long sum;
+ int i;
+
+ sum = 0;
+ for (i = 0; i < nr_range; i++)
+ sum += range[i].end + 1 - range[i].start;
+
+ return sum;
+}
+
+static int enable_mtrr_cleanup __initdata =
+ CONFIG_MTRR_SANITIZER_ENABLE_DEFAULT;
+
+static int __init disable_mtrr_cleanup_setup(char *str)
+{
+ enable_mtrr_cleanup = 0;
+ return 0;
+}
+early_param("disable_mtrr_cleanup", disable_mtrr_cleanup_setup);
+
+static int __init enable_mtrr_cleanup_setup(char *str)
+{
+ enable_mtrr_cleanup = 1;
+ return 0;
+}
+early_param("enable_mtrr_cleanup", enable_mtrr_cleanup_setup);
+
+static int __init mtrr_cleanup_debug_setup(char *str)
+{
+ debug_print = 1;
+ return 0;
+}
+early_param("mtrr_cleanup_debug", mtrr_cleanup_debug_setup);
+
+struct var_mtrr_state {
+ unsigned long range_startk;
+ unsigned long range_sizek;
+ unsigned long chunk_sizek;
+ unsigned long gran_sizek;
+ unsigned int reg;
+};
+
+static void __init
+set_var_mtrr(unsigned int reg, unsigned long basek, unsigned long sizek,
+ unsigned char type, unsigned int address_bits)
+{
+ u32 base_lo, base_hi, mask_lo, mask_hi;
+ u64 base, mask;
+
+ if (!sizek) {
+ fill_mtrr_var_range(reg, 0, 0, 0, 0);
+ return;
+ }
+
+ mask = (1ULL << address_bits) - 1;
+ mask &= ~((((u64)sizek) << 10) - 1);
+
+ base = ((u64)basek) << 10;
+
+ base |= type;
+ mask |= 0x800;
+
+ base_lo = base & ((1ULL<<32) - 1);
+ base_hi = base >> 32;
+
+ mask_lo = mask & ((1ULL<<32) - 1);
+ mask_hi = mask >> 32;
+
+ fill_mtrr_var_range(reg, base_lo, base_hi, mask_lo, mask_hi);
+}
+
+static void __init
+save_var_mtrr(unsigned int reg, unsigned long basek, unsigned long sizek,
+ unsigned char type)
+{
+ range_state[reg].base_pfn = basek >> (PAGE_SHIFT - 10);
+ range_state[reg].size_pfn = sizek >> (PAGE_SHIFT - 10);
+ range_state[reg].type = type;
+}
+
+static void __init
+set_var_mtrr_all(unsigned int address_bits)
+{
+ unsigned long basek, sizek;
+ unsigned char type;
+ unsigned int reg;
+
+ for (reg = 0; reg < num_var_ranges; reg++) {
+ basek = range_state[reg].base_pfn << (PAGE_SHIFT - 10);
+ sizek = range_state[reg].size_pfn << (PAGE_SHIFT - 10);
+ type = range_state[reg].type;
+
+ set_var_mtrr(reg, basek, sizek, type, address_bits);
+ }
+}
+
+static unsigned long to_size_factor(unsigned long sizek, char *factorp)
+{
+ char factor;
+ unsigned long base = sizek;
+
+ if (base & ((1<<10) - 1)) {
+ /* not MB alignment */
+ factor = 'K';
+ } else if (base & ((1<<20) - 1)) {
+ factor = 'M';
+ base >>= 10;
+ } else {
+ factor = 'G';
+ base >>= 20;
+ }
+
+ *factorp = factor;
+
+ return base;
+}
+
+static unsigned int __init
+range_to_mtrr(unsigned int reg, unsigned long range_startk,
+ unsigned long range_sizek, unsigned char type)
+{
+ if (!range_sizek || (reg >= num_var_ranges))
+ return reg;
+
+ while (range_sizek) {
+ unsigned long max_align, align;
+ unsigned long sizek;
+
+ /* Compute the maximum size I can make a range */
+ if (range_startk)
+ max_align = ffs(range_startk) - 1;
+ else
+ max_align = 32;
+ align = fls(range_sizek) - 1;
+ if (align > max_align)
+ align = max_align;
+
+ sizek = 1 << align;
+ if (debug_print) {
+ char start_factor = 'K', size_factor = 'K';
+ unsigned long start_base, size_base;
+
+ start_base = to_size_factor(range_startk,
+ &start_factor),
+ size_base = to_size_factor(sizek, &size_factor),
+
+ printk(KERN_DEBUG "Setting variable MTRR %d, "
+ "base: %ld%cB, range: %ld%cB, type %s\n",
+ reg, start_base, start_factor,
+ size_base, size_factor,
+ (type == MTRR_TYPE_UNCACHABLE) ? "UC" :
+ ((type == MTRR_TYPE_WRBACK) ? "WB" : "Other")
+ );
+ }
+ save_var_mtrr(reg++, range_startk, sizek, type);
+ range_startk += sizek;
+ range_sizek -= sizek;
+ if (reg >= num_var_ranges)
+ break;
+ }
+ return reg;
+}
+
+static unsigned __init
+range_to_mtrr_with_hole(struct var_mtrr_state *state, unsigned long basek,
+ unsigned long sizek)
+{
+ unsigned long hole_basek, hole_sizek;
+ unsigned long second_basek, second_sizek;
+ unsigned long range0_basek, range0_sizek;
+ unsigned long range_basek, range_sizek;
+ unsigned long chunk_sizek;
+ unsigned long gran_sizek;
+
+ hole_basek = 0;
+ hole_sizek = 0;
+ second_basek = 0;
+ second_sizek = 0;
+ chunk_sizek = state->chunk_sizek;
+ gran_sizek = state->gran_sizek;
+
+ /* align with gran size, prevent small block used up MTRRs */
+ range_basek = ALIGN(state->range_startk, gran_sizek);
+ if ((range_basek > basek) && basek)
+ return second_sizek;
+ state->range_sizek -= (range_basek - state->range_startk);
+ range_sizek = ALIGN(state->range_sizek, gran_sizek);
+
+ while (range_sizek > state->range_sizek) {
+ range_sizek -= gran_sizek;
+ if (!range_sizek)
+ return 0;
+ }
+ state->range_sizek = range_sizek;
+
+ /* try to append some small hole */
+ range0_basek = state->range_startk;
+ range0_sizek = ALIGN(state->range_sizek, chunk_sizek);
+
+ /* no increase */
+ if (range0_sizek == state->range_sizek) {
+ if (debug_print)
+ printk(KERN_DEBUG "rangeX: %016lx - %016lx\n",
+ range0_basek<<10,
+ (range0_basek + state->range_sizek)<<10);
+ state->reg = range_to_mtrr(state->reg, range0_basek,
+ state->range_sizek, MTRR_TYPE_WRBACK);
+ return 0;
+ }
+
+ /* only cut back, when it is not the last */
+ if (sizek) {
+ while (range0_basek + range0_sizek > (basek + sizek)) {
+ if (range0_sizek >= chunk_sizek)
+ range0_sizek -= chunk_sizek;
+ else
+ range0_sizek = 0;
+
+ if (!range0_sizek)
+ break;
+ }
+ }
+
+second_try:
+ range_basek = range0_basek + range0_sizek;
+
+ /* one hole in the middle */
+ if (range_basek > basek && range_basek <= (basek + sizek))
+ second_sizek = range_basek - basek;
+
+ if (range0_sizek > state->range_sizek) {
+
+ /* one hole in middle or at end */
+ hole_sizek = range0_sizek - state->range_sizek - second_sizek;
+
+ /* hole size should be less than half of range0 size */
+ if (hole_sizek >= (range0_sizek >> 1) &&
+ range0_sizek >= chunk_sizek) {
+ range0_sizek -= chunk_sizek;
+ second_sizek = 0;
+ hole_sizek = 0;
+
+ goto second_try;
+ }
+ }
+
+ if (range0_sizek) {
+ if (debug_print)
+ printk(KERN_DEBUG "range0: %016lx - %016lx\n",
+ range0_basek<<10,
+ (range0_basek + range0_sizek)<<10);
+ state->reg = range_to_mtrr(state->reg, range0_basek,
+ range0_sizek, MTRR_TYPE_WRBACK);
+ }
+
+ if (range0_sizek < state->range_sizek) {
+ /* need to handle left over */
+ range_sizek = state->range_sizek - range0_sizek;
+
+ if (debug_print)
+ printk(KERN_DEBUG "range: %016lx - %016lx\n",
+ range_basek<<10,
+ (range_basek + range_sizek)<<10);
+ state->reg = range_to_mtrr(state->reg, range_basek,
+ range_sizek, MTRR_TYPE_WRBACK);
+ }
+
+ if (hole_sizek) {
+ hole_basek = range_basek - hole_sizek - second_sizek;
+ if (debug_print)
+ printk(KERN_DEBUG "hole: %016lx - %016lx\n",
+ hole_basek<<10,
+ (hole_basek + hole_sizek)<<10);
+ state->reg = range_to_mtrr(state->reg, hole_basek,
+ hole_sizek, MTRR_TYPE_UNCACHABLE);
+ }
+
+ return second_sizek;
+}
+
+static void __init
+set_var_mtrr_range(struct var_mtrr_state *state, unsigned long base_pfn,
+ unsigned long size_pfn)
+{
+ unsigned long basek, sizek;
+ unsigned long second_sizek = 0;
+
+ if (state->reg >= num_var_ranges)
+ return;
+
+ basek = base_pfn << (PAGE_SHIFT - 10);
+ sizek = size_pfn << (PAGE_SHIFT - 10);
+
+ /* See if I can merge with the last range */
+ if ((basek <= 1024) ||
+ (state->range_startk + state->range_sizek == basek)) {
+ unsigned long endk = basek + sizek;
+ state->range_sizek = endk - state->range_startk;
+ return;
+ }
+ /* Write the range mtrrs */
+ if (state->range_sizek != 0)
+ second_sizek = range_to_mtrr_with_hole(state, basek, sizek);
+
+ /* Allocate an msr */
+ state->range_startk = basek + second_sizek;
+ state->range_sizek = sizek - second_sizek;
+}
+
+/* mininum size of mtrr block that can take hole */
+static u64 mtrr_chunk_size __initdata = (256ULL<<20);
+
+static int __init parse_mtrr_chunk_size_opt(char *p)
+{
+ if (!p)
+ return -EINVAL;
+ mtrr_chunk_size = memparse(p, &p);
+ return 0;
+}
+early_param("mtrr_chunk_size", parse_mtrr_chunk_size_opt);
+
+/* granity of mtrr of block */
+static u64 mtrr_gran_size __initdata;
+
+static int __init parse_mtrr_gran_size_opt(char *p)
+{
+ if (!p)
+ return -EINVAL;
+ mtrr_gran_size = memparse(p, &p);
+ return 0;
+}
+early_param("mtrr_gran_size", parse_mtrr_gran_size_opt);
+
+static int nr_mtrr_spare_reg __initdata =
+ CONFIG_MTRR_SANITIZER_SPARE_REG_NR_DEFAULT;
+
+static int __init parse_mtrr_spare_reg(char *arg)
+{
+ if (arg)
+ nr_mtrr_spare_reg = simple_strtoul(arg, NULL, 0);
+ return 0;
+}
+
+early_param("mtrr_spare_reg_nr", parse_mtrr_spare_reg);
+
+static int __init
+x86_setup_var_mtrrs(struct res_range *range, int nr_range,
+ u64 chunk_size, u64 gran_size)
+{
+ struct var_mtrr_state var_state;
+ int i;
+ int num_reg;
+
+ var_state.range_startk = 0;
+ var_state.range_sizek = 0;
+ var_state.reg = 0;
+ var_state.chunk_sizek = chunk_size >> 10;
+ var_state.gran_sizek = gran_size >> 10;
+
+ memset(range_state, 0, sizeof(range_state));
+
+ /* Write the range etc */
+ for (i = 0; i < nr_range; i++)
+ set_var_mtrr_range(&var_state, range[i].start,
+ range[i].end - range[i].start + 1);
+
+ /* Write the last range */
+ if (var_state.range_sizek != 0)
+ range_to_mtrr_with_hole(&var_state, 0, 0);
+
+ num_reg = var_state.reg;
+ /* Clear out the extra MTRR's */
+ while (var_state.reg < num_var_ranges) {
+ save_var_mtrr(var_state.reg, 0, 0, 0);
+ var_state.reg++;
+ }
+
+ return num_reg;
+}
+
+struct mtrr_cleanup_result {
+ unsigned long gran_sizek;
+ unsigned long chunk_sizek;
+ unsigned long lose_cover_sizek;
+ unsigned int num_reg;
+ int bad;
+};
+
+/*
+ * gran_size: 64K, 128K, 256K, 512K, 1M, 2M, ..., 2G
+ * chunk size: gran_size, ..., 2G
+ * so we need (1+16)*8
+ */
+#define NUM_RESULT 136
+#define PSHIFT (PAGE_SHIFT - 10)
+
+static struct mtrr_cleanup_result __initdata result[NUM_RESULT];
+static unsigned long __initdata min_loss_pfn[RANGE_NUM];
+
+static void __init print_out_mtrr_range_state(void)
+{
+ int i;
+ char start_factor = 'K', size_factor = 'K';
+ unsigned long start_base, size_base;
+ mtrr_type type;
+
+ for (i = 0; i < num_var_ranges; i++) {
+
+ size_base = range_state[i].size_pfn << (PAGE_SHIFT - 10);
+ if (!size_base)
+ continue;
+
+ size_base = to_size_factor(size_base, &size_factor),
+ start_base = range_state[i].base_pfn << (PAGE_SHIFT - 10);
+ start_base = to_size_factor(start_base, &start_factor),
+ type = range_state[i].type;
+
+ printk(KERN_DEBUG "reg %d, base: %ld%cB, range: %ld%cB, type %s\n",
+ i, start_base, start_factor,
+ size_base, size_factor,
+ (type == MTRR_TYPE_UNCACHABLE) ? "UC" :
+ ((type == MTRR_TYPE_WRPROT) ? "WP" :
+ ((type == MTRR_TYPE_WRBACK) ? "WB" : "Other"))
+ );
+ }
+}
+
+static int __init mtrr_need_cleanup(void)
+{
+ int i;
+ mtrr_type type;
+ unsigned long size;
+ /* extra one for all 0 */
+ int num[MTRR_NUM_TYPES + 1];
+
+ /* check entries number */
+ memset(num, 0, sizeof(num));
+ for (i = 0; i < num_var_ranges; i++) {
+ type = range_state[i].type;
+ size = range_state[i].size_pfn;
+ if (type >= MTRR_NUM_TYPES)
+ continue;
+ if (!size)
+ type = MTRR_NUM_TYPES;
+ if (type == MTRR_TYPE_WRPROT)
+ type = MTRR_TYPE_UNCACHABLE;
+ num[type]++;
+ }
+
+ /* check if we got UC entries */
+ if (!num[MTRR_TYPE_UNCACHABLE])
+ return 0;
+
+ /* check if we only had WB and UC */
+ if (num[MTRR_TYPE_WRBACK] + num[MTRR_TYPE_UNCACHABLE] !=
+ num_var_ranges - num[MTRR_NUM_TYPES])
+ return 0;
+
+ return 1;
+}
+
+static unsigned long __initdata range_sums;
+static void __init mtrr_calc_range_state(u64 chunk_size, u64 gran_size,
+ unsigned long extra_remove_base,
+ unsigned long extra_remove_size,
+ int i)
+{
+ int num_reg;
+ static struct res_range range_new[RANGE_NUM];
+ static int nr_range_new;
+ unsigned long range_sums_new;
+
+ /* convert ranges to var ranges state */
+ num_reg = x86_setup_var_mtrrs(range, nr_range,
+ chunk_size, gran_size);
+
+ /* we got new setting in range_state, check it */
+ memset(range_new, 0, sizeof(range_new));
+ nr_range_new = x86_get_mtrr_mem_range(range_new, 0,
+ extra_remove_base, extra_remove_size);
+ range_sums_new = sum_ranges(range_new, nr_range_new);
+
+ result[i].chunk_sizek = chunk_size >> 10;
+ result[i].gran_sizek = gran_size >> 10;
+ result[i].num_reg = num_reg;
+ if (range_sums < range_sums_new) {
+ result[i].lose_cover_sizek =
+ (range_sums_new - range_sums) << PSHIFT;
+ result[i].bad = 1;
+ } else
+ result[i].lose_cover_sizek =
+ (range_sums - range_sums_new) << PSHIFT;
+
+ /* double check it */
+ if (!result[i].bad && !result[i].lose_cover_sizek) {
+ if (nr_range_new != nr_range ||
+ memcmp(range, range_new, sizeof(range)))
+ result[i].bad = 1;
+ }
+
+ if (!result[i].bad && (range_sums - range_sums_new <
+ min_loss_pfn[num_reg])) {
+ min_loss_pfn[num_reg] =
+ range_sums - range_sums_new;
+ }
+}
+
+static void __init mtrr_print_out_one_result(int i)
+{
+ char gran_factor, chunk_factor, lose_factor;
+ unsigned long gran_base, chunk_base, lose_base;
+
+ gran_base = to_size_factor(result[i].gran_sizek, &gran_factor),
+ chunk_base = to_size_factor(result[i].chunk_sizek, &chunk_factor),
+ lose_base = to_size_factor(result[i].lose_cover_sizek, &lose_factor),
+ printk(KERN_INFO "%sgran_size: %ld%c \tchunk_size: %ld%c \t",
+ result[i].bad ? "*BAD*" : " ",
+ gran_base, gran_factor, chunk_base, chunk_factor);
+ printk(KERN_CONT "num_reg: %d \tlose cover RAM: %s%ld%c\n",
+ result[i].num_reg, result[i].bad ? "-" : "",
+ lose_base, lose_factor);
+}
+
+static int __init mtrr_search_optimal_index(void)
+{
+ int i;
+ int num_reg_good;
+ int index_good;
+
+ if (nr_mtrr_spare_reg >= num_var_ranges)
+ nr_mtrr_spare_reg = num_var_ranges - 1;
+ num_reg_good = -1;
+ for (i = num_var_ranges - nr_mtrr_spare_reg; i > 0; i--) {
+ if (!min_loss_pfn[i])
+ num_reg_good = i;
+ }
+
+ index_good = -1;
+ if (num_reg_good != -1) {
+ for (i = 0; i < NUM_RESULT; i++) {
+ if (!result[i].bad &&
+ result[i].num_reg == num_reg_good &&
+ !result[i].lose_cover_sizek) {
+ index_good = i;
+ break;
+ }
+ }
+ }
+
+ return index_good;
+}
+
+
+int __init mtrr_cleanup(unsigned address_bits)
+{
+ unsigned long extra_remove_base, extra_remove_size;
+ unsigned long base, size, def, dummy;
+ mtrr_type type;
+ u64 chunk_size, gran_size;
+ int index_good;
+ int i;
+
+ if (!is_cpu(INTEL) || enable_mtrr_cleanup < 1)
+ return 0;
+ rdmsr(MTRRdefType_MSR, def, dummy);
+ def &= 0xff;
+ if (def != MTRR_TYPE_UNCACHABLE)
+ return 0;
+
+ /* get it and store it aside */
+ memset(range_state, 0, sizeof(range_state));
+ for (i = 0; i < num_var_ranges; i++) {
+ mtrr_if->get(i, &base, &size, &type);
+ range_state[i].base_pfn = base;
+ range_state[i].size_pfn = size;
+ range_state[i].type = type;
+ }
+
+ /* check if we need handle it and can handle it */
+ if (!mtrr_need_cleanup())
+ return 0;
+
+ /* print original var MTRRs at first, for debugging: */
+ printk(KERN_DEBUG "original variable MTRRs\n");
+ print_out_mtrr_range_state();
+
+ memset(range, 0, sizeof(range));
+ extra_remove_size = 0;
+ extra_remove_base = 1 << (32 - PAGE_SHIFT);
+ if (mtrr_tom2)
+ extra_remove_size =
+ (mtrr_tom2 >> PAGE_SHIFT) - extra_remove_base;
+ nr_range = x86_get_mtrr_mem_range(range, 0, extra_remove_base,
+ extra_remove_size);
+ /*
+ * [0, 1M) should always be coverred by var mtrr with WB
+ * and fixed mtrrs should take effective before var mtrr for it
+ */
+ nr_range = add_range_with_merge(range, nr_range, 0,
+ (1ULL<<(20 - PAGE_SHIFT)) - 1);
+ /* sort the ranges */
+ sort(range, nr_range, sizeof(struct res_range), cmp_range, NULL);
+
+ range_sums = sum_ranges(range, nr_range);
+ printk(KERN_INFO "total RAM coverred: %ldM\n",
+ range_sums >> (20 - PAGE_SHIFT));
+
+ if (mtrr_chunk_size && mtrr_gran_size) {
+ i = 0;
+ mtrr_calc_range_state(mtrr_chunk_size, mtrr_gran_size,
+ extra_remove_base, extra_remove_size, i);
+
+ mtrr_print_out_one_result(i);
+
+ if (!result[i].bad) {
+ set_var_mtrr_all(address_bits);
+ printk(KERN_DEBUG "New variable MTRRs\n");
+ print_out_mtrr_range_state();
+ return 1;
+ }
+ printk(KERN_INFO "invalid mtrr_gran_size or mtrr_chunk_size, "
+ "will find optimal one\n");
+ }
+
+ i = 0;
+ memset(min_loss_pfn, 0xff, sizeof(min_loss_pfn));
+ memset(result, 0, sizeof(result));
+ for (gran_size = (1ULL<<16); gran_size < (1ULL<<32); gran_size <<= 1) {
+
+ for (chunk_size = gran_size; chunk_size < (1ULL<<32);
+ chunk_size <<= 1) {
+
+ if (i >= NUM_RESULT)
+ continue;
+
+ mtrr_calc_range_state(chunk_size, gran_size,
+ extra_remove_base, extra_remove_size, i);
+ if (debug_print) {
+ mtrr_print_out_one_result(i);
+ printk(KERN_INFO "\n");
+ }
+
+ i++;
+ }
+ }
+
+ /* try to find the optimal index */
+ index_good = mtrr_search_optimal_index();
+
+ if (index_good != -1) {
+ printk(KERN_INFO "Found optimal setting for mtrr clean up\n");
+ i = index_good;
+ mtrr_print_out_one_result(i);
+
+ /* convert ranges to var ranges state */
+ chunk_size = result[i].chunk_sizek;
+ chunk_size <<= 10;
+ gran_size = result[i].gran_sizek;
+ gran_size <<= 10;
+ x86_setup_var_mtrrs(range, nr_range, chunk_size, gran_size);
+ set_var_mtrr_all(address_bits);
+ printk(KERN_DEBUG "New variable MTRRs\n");
+ print_out_mtrr_range_state();
+ return 1;
+ } else {
+ /* print out all */
+ for (i = 0; i < NUM_RESULT; i++)
+ mtrr_print_out_one_result(i);
+ }
+
+ printk(KERN_INFO "mtrr_cleanup: can not find optimal value\n");
+ printk(KERN_INFO "please specify mtrr_gran_size/mtrr_chunk_size\n");
+
+ return 0;
+}
+#else
+int __init mtrr_cleanup(unsigned address_bits)
+{
+ return 0;
+}
+#endif
+
+static int disable_mtrr_trim;
+
+static int __init disable_mtrr_trim_setup(char *str)
+{
+ disable_mtrr_trim = 1;
+ return 0;
+}
+early_param("disable_mtrr_trim", disable_mtrr_trim_setup);
+
+/*
+ * Newer AMD K8s and later CPUs have a special magic MSR way to force WB
+ * for memory >4GB. Check for that here.
+ * Note this won't check if the MTRRs < 4GB where the magic bit doesn't
+ * apply to are wrong, but so far we don't know of any such case in the wild.
+ */
+#define Tom2Enabled (1U << 21)
+#define Tom2ForceMemTypeWB (1U << 22)
+
+int __init amd_special_default_mtrr(void)
+{
+ u32 l, h;
+
+ if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD)
+ return 0;
+ if (boot_cpu_data.x86 < 0xf || boot_cpu_data.x86 > 0x11)
+ return 0;
+ /* In case some hypervisor doesn't pass SYSCFG through */
+ if (rdmsr_safe(MSR_K8_SYSCFG, &l, &h) < 0)
+ return 0;
+ /*
+ * Memory between 4GB and top of mem is forced WB by this magic bit.
+ * Reserved before K8RevF, but should be zero there.
+ */
+ if ((l & (Tom2Enabled | Tom2ForceMemTypeWB)) ==
+ (Tom2Enabled | Tom2ForceMemTypeWB))
+ return 1;
+ return 0;
+}
+
+static u64 __init real_trim_memory(unsigned long start_pfn,
+ unsigned long limit_pfn)
+{
+ u64 trim_start, trim_size;
+ trim_start = start_pfn;
+ trim_start <<= PAGE_SHIFT;
+ trim_size = limit_pfn;
+ trim_size <<= PAGE_SHIFT;
+ trim_size -= trim_start;
+
+ return e820_update_range(trim_start, trim_size, E820_RAM,
+ E820_RESERVED);
+}
+/**
+ * mtrr_trim_uncached_memory - trim RAM not covered by MTRRs
+ * @end_pfn: ending page frame number
+ *
+ * Some buggy BIOSes don't setup the MTRRs properly for systems with certain
+ * memory configurations. This routine checks that the highest MTRR matches
+ * the end of memory, to make sure the MTRRs having a write back type cover
+ * all of the memory the kernel is intending to use. If not, it'll trim any
+ * memory off the end by adjusting end_pfn, removing it from the kernel's
+ * allocation pools, warning the user with an obnoxious message.
+ */
+int __init mtrr_trim_uncached_memory(unsigned long end_pfn)
+{
+ unsigned long i, base, size, highest_pfn = 0, def, dummy;
+ mtrr_type type;
+ u64 total_trim_size;
+
+ /* extra one for all 0 */
+ int num[MTRR_NUM_TYPES + 1];
+ /*
+ * Make sure we only trim uncachable memory on machines that
+ * support the Intel MTRR architecture:
+ */
+ if (!is_cpu(INTEL) || disable_mtrr_trim)
+ return 0;
+ rdmsr(MTRRdefType_MSR, def, dummy);
+ def &= 0xff;
+ if (def != MTRR_TYPE_UNCACHABLE)
+ return 0;
+
+ /* get it and store it aside */
+ memset(range_state, 0, sizeof(range_state));
+ for (i = 0; i < num_var_ranges; i++) {
+ mtrr_if->get(i, &base, &size, &type);
+ range_state[i].base_pfn = base;
+ range_state[i].size_pfn = size;
+ range_state[i].type = type;
+ }
+
+ /* Find highest cached pfn */
+ for (i = 0; i < num_var_ranges; i++) {
+ type = range_state[i].type;
+ if (type != MTRR_TYPE_WRBACK)
+ continue;
+ base = range_state[i].base_pfn;
+ size = range_state[i].size_pfn;
+ if (highest_pfn < base + size)
+ highest_pfn = base + size;
+ }
+
+ /* kvm/qemu doesn't have mtrr set right, don't trim them all */
+ if (!highest_pfn) {
+ printk(KERN_INFO "CPU MTRRs all blank - virtualized system.\n");
+ return 0;
+ }
+
+ /* check entries number */
+ memset(num, 0, sizeof(num));
+ for (i = 0; i < num_var_ranges; i++) {
+ type = range_state[i].type;
+ if (type >= MTRR_NUM_TYPES)
+ continue;
+ size = range_state[i].size_pfn;
+ if (!size)
+ type = MTRR_NUM_TYPES;
+ num[type]++;
+ }
+
+ /* no entry for WB? */
+ if (!num[MTRR_TYPE_WRBACK])
+ return 0;
+
+ /* check if we only had WB and UC */
+ if (num[MTRR_TYPE_WRBACK] + num[MTRR_TYPE_UNCACHABLE] !=
+ num_var_ranges - num[MTRR_NUM_TYPES])
+ return 0;
+
+ memset(range, 0, sizeof(range));
+ nr_range = 0;
+ if (mtrr_tom2) {
+ range[nr_range].start = (1ULL<<(32 - PAGE_SHIFT));
+ range[nr_range].end = (mtrr_tom2 >> PAGE_SHIFT) - 1;
+ if (highest_pfn < range[nr_range].end + 1)
+ highest_pfn = range[nr_range].end + 1;
+ nr_range++;
+ }
+ nr_range = x86_get_mtrr_mem_range(range, nr_range, 0, 0);
+
+ total_trim_size = 0;
+ /* check the head */
+ if (range[0].start)
+ total_trim_size += real_trim_memory(0, range[0].start);
+ /* check the holes */
+ for (i = 0; i < nr_range - 1; i++) {
+ if (range[i].end + 1 < range[i+1].start)
+ total_trim_size += real_trim_memory(range[i].end + 1,
+ range[i+1].start);
+ }
+ /* check the top */
+ i = nr_range - 1;
+ if (range[i].end + 1 < end_pfn)
+ total_trim_size += real_trim_memory(range[i].end + 1,
+ end_pfn);
+
+ if (total_trim_size) {
+ printk(KERN_WARNING "WARNING: BIOS bug: CPU MTRRs don't cover"
+ " all of memory, losing %lluMB of RAM.\n",
+ total_trim_size >> 20);
+
+ if (!changed_by_mtrr_cleanup)
+ WARN_ON(1);
+
+ printk(KERN_INFO "update e820 for mtrr\n");
+ update_e820();
+
+ return 1;
+ }
+
+ return 0;
+}
+
diff --git a/arch/x86/kernel/cpu/mtrr/generic.c b/arch/x86/kernel/cpu/mtrr/generic.c
index 0c0a455fe95c..0b776c09aff3 100644
--- a/arch/x86/kernel/cpu/mtrr/generic.c
+++ b/arch/x86/kernel/cpu/mtrr/generic.c
@@ -33,13 +33,31 @@ u64 mtrr_tom2;
struct mtrr_state_type mtrr_state = {};
EXPORT_SYMBOL_GPL(mtrr_state);
-static int __initdata mtrr_show;
-static int __init mtrr_debug(char *opt)
+/**
+ * BIOS is expected to clear MtrrFixDramModEn bit, see for example
+ * "BIOS and Kernel Developer's Guide for the AMD Athlon 64 and AMD
+ * Opteron Processors" (26094 Rev. 3.30 February 2006), section
+ * "13.2.1.2 SYSCFG Register": "The MtrrFixDramModEn bit should be set
+ * to 1 during BIOS initalization of the fixed MTRRs, then cleared to
+ * 0 for operation."
+ */
+static inline void k8_check_syscfg_dram_mod_en(void)
{
- mtrr_show = 1;
- return 0;
+ u32 lo, hi;
+
+ if (!((boot_cpu_data.x86_vendor == X86_VENDOR_AMD) &&
+ (boot_cpu_data.x86 >= 0x0f)))
+ return;
+
+ rdmsr(MSR_K8_SYSCFG, lo, hi);
+ if (lo & K8_MTRRFIXRANGE_DRAM_MODIFY) {
+ printk(KERN_ERR FW_WARN "MTRR: CPU %u: SYSCFG[MtrrFixDramModEn]"
+ " not cleared by BIOS, clearing this bit\n",
+ smp_processor_id());
+ lo &= ~K8_MTRRFIXRANGE_DRAM_MODIFY;
+ mtrr_wrmsr(MSR_K8_SYSCFG, lo, hi);
+ }
}
-early_param("mtrr.show", mtrr_debug);
/*
* Returns the effective MTRR type for the region
@@ -174,6 +192,8 @@ get_fixed_ranges(mtrr_type * frs)
unsigned int *p = (unsigned int *) frs;
int i;
+ k8_check_syscfg_dram_mod_en();
+
rdmsr(MTRRfix64K_00000_MSR, p[0], p[1]);
for (i = 0; i < 2; i++)
@@ -188,18 +208,94 @@ void mtrr_save_fixed_ranges(void *info)
get_fixed_ranges(mtrr_state.fixed_ranges);
}
-static void print_fixed(unsigned base, unsigned step, const mtrr_type*types)
+static unsigned __initdata last_fixed_start;
+static unsigned __initdata last_fixed_end;
+static mtrr_type __initdata last_fixed_type;
+
+static void __init print_fixed_last(void)
+{
+ if (!last_fixed_end)
+ return;
+
+ printk(KERN_DEBUG " %05X-%05X %s\n", last_fixed_start,
+ last_fixed_end - 1, mtrr_attrib_to_str(last_fixed_type));
+
+ last_fixed_end = 0;
+}
+
+static void __init update_fixed_last(unsigned base, unsigned end,
+ mtrr_type type)
+{
+ last_fixed_start = base;
+ last_fixed_end = end;
+ last_fixed_type = type;
+}
+
+static void __init print_fixed(unsigned base, unsigned step,
+ const mtrr_type *types)
{
unsigned i;
- for (i = 0; i < 8; ++i, ++types, base += step)
- printk(KERN_INFO "MTRR %05X-%05X %s\n",
- base, base + step - 1, mtrr_attrib_to_str(*types));
+ for (i = 0; i < 8; ++i, ++types, base += step) {
+ if (last_fixed_end == 0) {
+ update_fixed_last(base, base + step, *types);
+ continue;
+ }
+ if (last_fixed_end == base && last_fixed_type == *types) {
+ last_fixed_end = base + step;
+ continue;
+ }
+ /* new segments: gap or different type */
+ print_fixed_last();
+ update_fixed_last(base, base + step, *types);
+ }
}
static void prepare_set(void);
static void post_set(void);
+static void __init print_mtrr_state(void)
+{
+ unsigned int i;
+ int high_width;
+
+ printk(KERN_DEBUG "MTRR default type: %s\n",
+ mtrr_attrib_to_str(mtrr_state.def_type));
+ if (mtrr_state.have_fixed) {
+ printk(KERN_DEBUG "MTRR fixed ranges %sabled:\n",
+ mtrr_state.enabled & 1 ? "en" : "dis");
+ print_fixed(0x00000, 0x10000, mtrr_state.fixed_ranges + 0);
+ for (i = 0; i < 2; ++i)
+ print_fixed(0x80000 + i * 0x20000, 0x04000, mtrr_state.fixed_ranges + (i + 1) * 8);
+ for (i = 0; i < 8; ++i)
+ print_fixed(0xC0000 + i * 0x08000, 0x01000, mtrr_state.fixed_ranges + (i + 3) * 8);
+
+ /* tail */
+ print_fixed_last();
+ }
+ printk(KERN_DEBUG "MTRR variable ranges %sabled:\n",
+ mtrr_state.enabled & 2 ? "en" : "dis");
+ high_width = ((size_or_mask ? ffs(size_or_mask) - 1 : 32) - (32 - PAGE_SHIFT) + 3) / 4;
+ for (i = 0; i < num_var_ranges; ++i) {
+ if (mtrr_state.var_ranges[i].mask_lo & (1 << 11))
+ printk(KERN_DEBUG " %u base %0*X%05X000 mask %0*X%05X000 %s\n",
+ i,
+ high_width,
+ mtrr_state.var_ranges[i].base_hi,
+ mtrr_state.var_ranges[i].base_lo >> 12,
+ high_width,
+ mtrr_state.var_ranges[i].mask_hi,
+ mtrr_state.var_ranges[i].mask_lo >> 12,
+ mtrr_attrib_to_str(mtrr_state.var_ranges[i].base_lo & 0xff));
+ else
+ printk(KERN_DEBUG " %u disabled\n", i);
+ }
+ if (mtrr_tom2) {
+ printk(KERN_DEBUG "TOM2: %016llx aka %lldM\n",
+ mtrr_tom2, mtrr_tom2>>20);
+ }
+}
+
/* Grab all of the MTRR state for this CPU into *state */
void __init get_mtrr_state(void)
{
@@ -231,41 +327,9 @@ void __init get_mtrr_state(void)
mtrr_tom2 |= low;
mtrr_tom2 &= 0xffffff800000ULL;
}
- if (mtrr_show) {
- int high_width;
-
- printk(KERN_INFO "MTRR default type: %s\n", mtrr_attrib_to_str(mtrr_state.def_type));
- if (mtrr_state.have_fixed) {
- printk(KERN_INFO "MTRR fixed ranges %sabled:\n",
- mtrr_state.enabled & 1 ? "en" : "dis");
- print_fixed(0x00000, 0x10000, mtrr_state.fixed_ranges + 0);
- for (i = 0; i < 2; ++i)
- print_fixed(0x80000 + i * 0x20000, 0x04000, mtrr_state.fixed_ranges + (i + 1) * 8);
- for (i = 0; i < 8; ++i)
- print_fixed(0xC0000 + i * 0x08000, 0x01000, mtrr_state.fixed_ranges + (i + 3) * 8);
- }
- printk(KERN_INFO "MTRR variable ranges %sabled:\n",
- mtrr_state.enabled & 2 ? "en" : "dis");
- high_width = ((size_or_mask ? ffs(size_or_mask) - 1 : 32) - (32 - PAGE_SHIFT) + 3) / 4;
- for (i = 0; i < num_var_ranges; ++i) {
- if (mtrr_state.var_ranges[i].mask_lo & (1 << 11))
- printk(KERN_INFO "MTRR %u base %0*X%05X000 mask %0*X%05X000 %s\n",
- i,
- high_width,
- mtrr_state.var_ranges[i].base_hi,
- mtrr_state.var_ranges[i].base_lo >> 12,
- high_width,
- mtrr_state.var_ranges[i].mask_hi,
- mtrr_state.var_ranges[i].mask_lo >> 12,
- mtrr_attrib_to_str(mtrr_state.var_ranges[i].base_lo & 0xff));
- else
- printk(KERN_INFO "MTRR %u disabled\n", i);
- }
- if (mtrr_tom2) {
- printk(KERN_INFO "TOM2: %016llx aka %lldM\n",
- mtrr_tom2, mtrr_tom2>>20);
- }
- }
+
+ print_mtrr_state();
+
mtrr_state_set = 1;
/* PAT setup for BP. We need to go through sync steps here */
@@ -308,27 +372,10 @@ void mtrr_wrmsr(unsigned msr, unsigned a, unsigned b)
}
/**
- * Enable and allow read/write of extended fixed-range MTRR bits on K8 CPUs
- * see AMD publication no. 24593, chapter 3.2.1 for more information
- */
-static inline void k8_enable_fixed_iorrs(void)
-{
- unsigned lo, hi;
-
- rdmsr(MSR_K8_SYSCFG, lo, hi);
- mtrr_wrmsr(MSR_K8_SYSCFG, lo
- | K8_MTRRFIXRANGE_DRAM_ENABLE
- | K8_MTRRFIXRANGE_DRAM_MODIFY, hi);
-}
-
-/**
* set_fixed_range - checks & updates a fixed-range MTRR if it differs from the value it should have
* @msr: MSR address of the MTTR which should be checked and updated
* @changed: pointer which indicates whether the MTRR needed to be changed
* @msrwords: pointer to the MSR values which the MSR should have
- *
- * If K8 extentions are wanted, update the K8 SYSCFG MSR also.
- * See AMD publication no. 24593, chapter 7.8.1, page 233 for more information.
*/
static void set_fixed_range(int msr, bool *changed, unsigned int *msrwords)
{
@@ -337,10 +384,6 @@ static void set_fixed_range(int msr, bool *changed, unsigned int *msrwords)
rdmsr(msr, lo, hi);
if (lo != msrwords[0] || hi != msrwords[1]) {
- if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
- (boot_cpu_data.x86 >= 0x0f && boot_cpu_data.x86 <= 0x11) &&
- ((msrwords[0] | msrwords[1]) & K8_MTRR_RDMEM_WRMEM_MASK))
- k8_enable_fixed_iorrs();
mtrr_wrmsr(msr, msrwords[0], msrwords[1]);
*changed = true;
}
@@ -376,22 +419,31 @@ static void generic_get_mtrr(unsigned int reg, unsigned long *base,
{
unsigned int mask_lo, mask_hi, base_lo, base_hi;
unsigned int tmp, hi;
+ int cpu;
+
+ /*
+ * get_mtrr doesn't need to update mtrr_state, also it could be called
+ * from any cpu, so try to print it out directly.
+ */
+ cpu = get_cpu();
rdmsr(MTRRphysMask_MSR(reg), mask_lo, mask_hi);
+
if ((mask_lo & 0x800) == 0) {
/* Invalid (i.e. free) range */
*base = 0;
*size = 0;
*type = 0;
- return;
+ goto out_put_cpu;
}
rdmsr(MTRRphysBase_MSR(reg), base_lo, base_hi);
- /* Work out the shifted address mask. */
+ /* Work out the shifted address mask: */
tmp = mask_hi << (32 - PAGE_SHIFT) | mask_lo >> PAGE_SHIFT;
mask_lo = size_or_mask | tmp;
- /* Expand tmp with high bits to all 1s*/
+
+ /* Expand tmp with high bits to all 1s: */
hi = fls(tmp);
if (hi > 0) {
tmp |= ~((1<<(hi - 1)) - 1);
@@ -402,11 +454,16 @@ static void generic_get_mtrr(unsigned int reg, unsigned long *base,
}
}
- /* This works correctly if size is a power of two, i.e. a
- contiguous range. */
+ /*
+ * This works correctly if size is a power of two, i.e. a
+ * contiguous range:
+ */
*size = -mask_lo;
*base = base_hi << (32 - PAGE_SHIFT) | base_lo >> PAGE_SHIFT;
*type = base_lo & 0xff;
+
+out_put_cpu:
+ put_cpu();
}
/**
@@ -419,6 +476,8 @@ static int set_fixed_ranges(mtrr_type * frs)
bool changed = false;
int block=-1, range;
+ k8_check_syscfg_dram_mod_en();
+
while (fixed_range_blocks[++block].ranges)
for (range=0; range < fixed_range_blocks[block].ranges; range++)
set_fixed_range(fixed_range_blocks[block].base_msr + range,
diff --git a/arch/x86/kernel/cpu/mtrr/if.c b/arch/x86/kernel/cpu/mtrr/if.c
index 4c4214690dd1..fb73a52913a4 100644
--- a/arch/x86/kernel/cpu/mtrr/if.c
+++ b/arch/x86/kernel/cpu/mtrr/if.c
@@ -377,10 +377,6 @@ static const struct file_operations mtrr_fops = {
.release = mtrr_close,
};
-
-static struct proc_dir_entry *proc_root_mtrr;
-
-
static int mtrr_seq_show(struct seq_file *seq, void *offset)
{
char factor;
@@ -423,11 +419,7 @@ static int __init mtrr_if_init(void)
(!cpu_has(c, X86_FEATURE_CENTAUR_MCR)))
return -ENODEV;
- proc_root_mtrr =
- proc_create("mtrr", S_IWUSR | S_IRUGO, NULL, &mtrr_fops);
-
- if (proc_root_mtrr)
- proc_root_mtrr->owner = THIS_MODULE;
+ proc_create("mtrr", S_IWUSR | S_IRUGO, NULL, &mtrr_fops);
return 0;
}
diff --git a/arch/x86/kernel/cpu/mtrr/main.c b/arch/x86/kernel/cpu/mtrr/main.c
index 236a401b8259..03cda01f57c7 100644
--- a/arch/x86/kernel/cpu/mtrr/main.c
+++ b/arch/x86/kernel/cpu/mtrr/main.c
@@ -574,7 +574,7 @@ struct mtrr_value {
unsigned long lsize;
};
-static struct mtrr_value mtrr_state[MTRR_MAX_VAR_RANGES];
+static struct mtrr_value mtrr_value[MTRR_MAX_VAR_RANGES];
static int mtrr_save(struct sys_device * sysdev, pm_message_t state)
{
@@ -582,9 +582,9 @@ static int mtrr_save(struct sys_device * sysdev, pm_message_t state)
for (i = 0; i < num_var_ranges; i++) {
mtrr_if->get(i,
- &mtrr_state[i].lbase,
- &mtrr_state[i].lsize,
- &mtrr_state[i].ltype);
+ &mtrr_value[i].lbase,
+ &mtrr_value[i].lsize,
+ &mtrr_value[i].ltype);
}
return 0;
}
@@ -594,11 +594,11 @@ static int mtrr_restore(struct sys_device * sysdev)
int i;
for (i = 0; i < num_var_ranges; i++) {
- if (mtrr_state[i].lsize)
+ if (mtrr_value[i].lsize)
set_mtrr(i,
- mtrr_state[i].lbase,
- mtrr_state[i].lsize,
- mtrr_state[i].ltype);
+ mtrr_value[i].lbase,
+ mtrr_value[i].lsize,
+ mtrr_value[i].ltype);
}
return 0;
}
@@ -610,1058 +610,7 @@ static struct sysdev_driver mtrr_sysdev_driver = {
.resume = mtrr_restore,
};
-/* should be related to MTRR_VAR_RANGES nums */
-#define RANGE_NUM 256
-
-struct res_range {
- unsigned long start;
- unsigned long end;
-};
-
-static int __init
-add_range(struct res_range *range, int nr_range, unsigned long start,
- unsigned long end)
-{
- /* out of slots */
- if (nr_range >= RANGE_NUM)
- return nr_range;
-
- range[nr_range].start = start;
- range[nr_range].end = end;
-
- nr_range++;
-
- return nr_range;
-}
-
-static int __init
-add_range_with_merge(struct res_range *range, int nr_range, unsigned long start,
- unsigned long end)
-{
- int i;
-
- /* try to merge it with old one */
- for (i = 0; i < nr_range; i++) {
- unsigned long final_start, final_end;
- unsigned long common_start, common_end;
-
- if (!range[i].end)
- continue;
-
- common_start = max(range[i].start, start);
- common_end = min(range[i].end, end);
- if (common_start > common_end + 1)
- continue;
-
- final_start = min(range[i].start, start);
- final_end = max(range[i].end, end);
-
- range[i].start = final_start;
- range[i].end = final_end;
- return nr_range;
- }
-
- /* need to add that */
- return add_range(range, nr_range, start, end);
-}
-
-static void __init
-subtract_range(struct res_range *range, unsigned long start, unsigned long end)
-{
- int i, j;
-
- for (j = 0; j < RANGE_NUM; j++) {
- if (!range[j].end)
- continue;
-
- if (start <= range[j].start && end >= range[j].end) {
- range[j].start = 0;
- range[j].end = 0;
- continue;
- }
-
- if (start <= range[j].start && end < range[j].end &&
- range[j].start < end + 1) {
- range[j].start = end + 1;
- continue;
- }
-
-
- if (start > range[j].start && end >= range[j].end &&
- range[j].end > start - 1) {
- range[j].end = start - 1;
- continue;
- }
-
- if (start > range[j].start && end < range[j].end) {
- /* find the new spare */
- for (i = 0; i < RANGE_NUM; i++) {
- if (range[i].end == 0)
- break;
- }
- if (i < RANGE_NUM) {
- range[i].end = range[j].end;
- range[i].start = end + 1;
- } else {
- printk(KERN_ERR "run of slot in ranges\n");
- }
- range[j].end = start - 1;
- continue;
- }
- }
-}
-
-static int __init cmp_range(const void *x1, const void *x2)
-{
- const struct res_range *r1 = x1;
- const struct res_range *r2 = x2;
- long start1, start2;
-
- start1 = r1->start;
- start2 = r2->start;
-
- return start1 - start2;
-}
-
-struct var_mtrr_range_state {
- unsigned long base_pfn;
- unsigned long size_pfn;
- mtrr_type type;
-};
-
-static struct var_mtrr_range_state __initdata range_state[RANGE_NUM];
-static int __initdata debug_print;
-
-static int __init
-x86_get_mtrr_mem_range(struct res_range *range, int nr_range,
- unsigned long extra_remove_base,
- unsigned long extra_remove_size)
-{
- unsigned long i, base, size;
- mtrr_type type;
-
- for (i = 0; i < num_var_ranges; i++) {
- type = range_state[i].type;
- if (type != MTRR_TYPE_WRBACK)
- continue;
- base = range_state[i].base_pfn;
- size = range_state[i].size_pfn;
- nr_range = add_range_with_merge(range, nr_range, base,
- base + size - 1);
- }
- if (debug_print) {
- printk(KERN_DEBUG "After WB checking\n");
- for (i = 0; i < nr_range; i++)
- printk(KERN_DEBUG "MTRR MAP PFN: %016lx - %016lx\n",
- range[i].start, range[i].end + 1);
- }
-
- /* take out UC ranges */
- for (i = 0; i < num_var_ranges; i++) {
- type = range_state[i].type;
- if (type != MTRR_TYPE_UNCACHABLE &&
- type != MTRR_TYPE_WRPROT)
- continue;
- size = range_state[i].size_pfn;
- if (!size)
- continue;
- base = range_state[i].base_pfn;
- subtract_range(range, base, base + size - 1);
- }
- if (extra_remove_size)
- subtract_range(range, extra_remove_base,
- extra_remove_base + extra_remove_size - 1);
-
- /* get new range num */
- nr_range = 0;
- for (i = 0; i < RANGE_NUM; i++) {
- if (!range[i].end)
- continue;
- nr_range++;
- }
- if (debug_print) {
- printk(KERN_DEBUG "After UC checking\n");
- for (i = 0; i < nr_range; i++)
- printk(KERN_DEBUG "MTRR MAP PFN: %016lx - %016lx\n",
- range[i].start, range[i].end + 1);
- }
-
- /* sort the ranges */
- sort(range, nr_range, sizeof(struct res_range), cmp_range, NULL);
- if (debug_print) {
- printk(KERN_DEBUG "After sorting\n");
- for (i = 0; i < nr_range; i++)
- printk(KERN_DEBUG "MTRR MAP PFN: %016lx - %016lx\n",
- range[i].start, range[i].end + 1);
- }
-
- /* clear those is not used */
- for (i = nr_range; i < RANGE_NUM; i++)
- memset(&range[i], 0, sizeof(range[i]));
-
- return nr_range;
-}
-
-static struct res_range __initdata range[RANGE_NUM];
-static int __initdata nr_range;
-
-#ifdef CONFIG_MTRR_SANITIZER
-
-static unsigned long __init sum_ranges(struct res_range *range, int nr_range)
-{
- unsigned long sum;
- int i;
-
- sum = 0;
- for (i = 0; i < nr_range; i++)
- sum += range[i].end + 1 - range[i].start;
-
- return sum;
-}
-
-static int enable_mtrr_cleanup __initdata =
- CONFIG_MTRR_SANITIZER_ENABLE_DEFAULT;
-
-static int __init disable_mtrr_cleanup_setup(char *str)
-{
- enable_mtrr_cleanup = 0;
- return 0;
-}
-early_param("disable_mtrr_cleanup", disable_mtrr_cleanup_setup);
-
-static int __init enable_mtrr_cleanup_setup(char *str)
-{
- enable_mtrr_cleanup = 1;
- return 0;
-}
-early_param("enable_mtrr_cleanup", enable_mtrr_cleanup_setup);
-
-static int __init mtrr_cleanup_debug_setup(char *str)
-{
- debug_print = 1;
- return 0;
-}
-early_param("mtrr_cleanup_debug", mtrr_cleanup_debug_setup);
-
-struct var_mtrr_state {
- unsigned long range_startk;
- unsigned long range_sizek;
- unsigned long chunk_sizek;
- unsigned long gran_sizek;
- unsigned int reg;
-};
-
-static void __init
-set_var_mtrr(unsigned int reg, unsigned long basek, unsigned long sizek,
- unsigned char type, unsigned int address_bits)
-{
- u32 base_lo, base_hi, mask_lo, mask_hi;
- u64 base, mask;
-
- if (!sizek) {
- fill_mtrr_var_range(reg, 0, 0, 0, 0);
- return;
- }
-
- mask = (1ULL << address_bits) - 1;
- mask &= ~((((u64)sizek) << 10) - 1);
-
- base = ((u64)basek) << 10;
-
- base |= type;
- mask |= 0x800;
-
- base_lo = base & ((1ULL<<32) - 1);
- base_hi = base >> 32;
-
- mask_lo = mask & ((1ULL<<32) - 1);
- mask_hi = mask >> 32;
-
- fill_mtrr_var_range(reg, base_lo, base_hi, mask_lo, mask_hi);
-}
-
-static void __init
-save_var_mtrr(unsigned int reg, unsigned long basek, unsigned long sizek,
- unsigned char type)
-{
- range_state[reg].base_pfn = basek >> (PAGE_SHIFT - 10);
- range_state[reg].size_pfn = sizek >> (PAGE_SHIFT - 10);
- range_state[reg].type = type;
-}
-
-static void __init
-set_var_mtrr_all(unsigned int address_bits)
-{
- unsigned long basek, sizek;
- unsigned char type;
- unsigned int reg;
-
- for (reg = 0; reg < num_var_ranges; reg++) {
- basek = range_state[reg].base_pfn << (PAGE_SHIFT - 10);
- sizek = range_state[reg].size_pfn << (PAGE_SHIFT - 10);
- type = range_state[reg].type;
-
- set_var_mtrr(reg, basek, sizek, type, address_bits);
- }
-}
-
-static unsigned long to_size_factor(unsigned long sizek, char *factorp)
-{
- char factor;
- unsigned long base = sizek;
-
- if (base & ((1<<10) - 1)) {
- /* not MB alignment */
- factor = 'K';
- } else if (base & ((1<<20) - 1)){
- factor = 'M';
- base >>= 10;
- } else {
- factor = 'G';
- base >>= 20;
- }
-
- *factorp = factor;
-
- return base;
-}
-
-static unsigned int __init
-range_to_mtrr(unsigned int reg, unsigned long range_startk,
- unsigned long range_sizek, unsigned char type)
-{
- if (!range_sizek || (reg >= num_var_ranges))
- return reg;
-
- while (range_sizek) {
- unsigned long max_align, align;
- unsigned long sizek;
-
- /* Compute the maximum size I can make a range */
- if (range_startk)
- max_align = ffs(range_startk) - 1;
- else
- max_align = 32;
- align = fls(range_sizek) - 1;
- if (align > max_align)
- align = max_align;
-
- sizek = 1 << align;
- if (debug_print) {
- char start_factor = 'K', size_factor = 'K';
- unsigned long start_base, size_base;
-
- start_base = to_size_factor(range_startk, &start_factor),
- size_base = to_size_factor(sizek, &size_factor),
-
- printk(KERN_DEBUG "Setting variable MTRR %d, "
- "base: %ld%cB, range: %ld%cB, type %s\n",
- reg, start_base, start_factor,
- size_base, size_factor,
- (type == MTRR_TYPE_UNCACHABLE)?"UC":
- ((type == MTRR_TYPE_WRBACK)?"WB":"Other")
- );
- }
- save_var_mtrr(reg++, range_startk, sizek, type);
- range_startk += sizek;
- range_sizek -= sizek;
- if (reg >= num_var_ranges)
- break;
- }
- return reg;
-}
-
-static unsigned __init
-range_to_mtrr_with_hole(struct var_mtrr_state *state, unsigned long basek,
- unsigned long sizek)
-{
- unsigned long hole_basek, hole_sizek;
- unsigned long second_basek, second_sizek;
- unsigned long range0_basek, range0_sizek;
- unsigned long range_basek, range_sizek;
- unsigned long chunk_sizek;
- unsigned long gran_sizek;
-
- hole_basek = 0;
- hole_sizek = 0;
- second_basek = 0;
- second_sizek = 0;
- chunk_sizek = state->chunk_sizek;
- gran_sizek = state->gran_sizek;
-
- /* align with gran size, prevent small block used up MTRRs */
- range_basek = ALIGN(state->range_startk, gran_sizek);
- if ((range_basek > basek) && basek)
- return second_sizek;
- state->range_sizek -= (range_basek - state->range_startk);
- range_sizek = ALIGN(state->range_sizek, gran_sizek);
-
- while (range_sizek > state->range_sizek) {
- range_sizek -= gran_sizek;
- if (!range_sizek)
- return 0;
- }
- state->range_sizek = range_sizek;
-
- /* try to append some small hole */
- range0_basek = state->range_startk;
- range0_sizek = ALIGN(state->range_sizek, chunk_sizek);
-
- /* no increase */
- if (range0_sizek == state->range_sizek) {
- if (debug_print)
- printk(KERN_DEBUG "rangeX: %016lx - %016lx\n",
- range0_basek<<10,
- (range0_basek + state->range_sizek)<<10);
- state->reg = range_to_mtrr(state->reg, range0_basek,
- state->range_sizek, MTRR_TYPE_WRBACK);
- return 0;
- }
-
- /* only cut back, when it is not the last */
- if (sizek) {
- while (range0_basek + range0_sizek > (basek + sizek)) {
- if (range0_sizek >= chunk_sizek)
- range0_sizek -= chunk_sizek;
- else
- range0_sizek = 0;
-
- if (!range0_sizek)
- break;
- }
- }
-
-second_try:
- range_basek = range0_basek + range0_sizek;
-
- /* one hole in the middle */
- if (range_basek > basek && range_basek <= (basek + sizek))
- second_sizek = range_basek - basek;
-
- if (range0_sizek > state->range_sizek) {
-
- /* one hole in middle or at end */
- hole_sizek = range0_sizek - state->range_sizek - second_sizek;
-
- /* hole size should be less than half of range0 size */
- if (hole_sizek >= (range0_sizek >> 1) &&
- range0_sizek >= chunk_sizek) {
- range0_sizek -= chunk_sizek;
- second_sizek = 0;
- hole_sizek = 0;
-
- goto second_try;
- }
- }
-
- if (range0_sizek) {
- if (debug_print)
- printk(KERN_DEBUG "range0: %016lx - %016lx\n",
- range0_basek<<10,
- (range0_basek + range0_sizek)<<10);
- state->reg = range_to_mtrr(state->reg, range0_basek,
- range0_sizek, MTRR_TYPE_WRBACK);
- }
-
- if (range0_sizek < state->range_sizek) {
- /* need to handle left over */
- range_sizek = state->range_sizek - range0_sizek;
-
- if (debug_print)
- printk(KERN_DEBUG "range: %016lx - %016lx\n",
- range_basek<<10,
- (range_basek + range_sizek)<<10);
- state->reg = range_to_mtrr(state->reg, range_basek,
- range_sizek, MTRR_TYPE_WRBACK);
- }
-
- if (hole_sizek) {
- hole_basek = range_basek - hole_sizek - second_sizek;
- if (debug_print)
- printk(KERN_DEBUG "hole: %016lx - %016lx\n",
- hole_basek<<10,
- (hole_basek + hole_sizek)<<10);
- state->reg = range_to_mtrr(state->reg, hole_basek,
- hole_sizek, MTRR_TYPE_UNCACHABLE);
- }
-
- return second_sizek;
-}
-
-static void __init
-set_var_mtrr_range(struct var_mtrr_state *state, unsigned long base_pfn,
- unsigned long size_pfn)
-{
- unsigned long basek, sizek;
- unsigned long second_sizek = 0;
-
- if (state->reg >= num_var_ranges)
- return;
-
- basek = base_pfn << (PAGE_SHIFT - 10);
- sizek = size_pfn << (PAGE_SHIFT - 10);
-
- /* See if I can merge with the last range */
- if ((basek <= 1024) ||
- (state->range_startk + state->range_sizek == basek)) {
- unsigned long endk = basek + sizek;
- state->range_sizek = endk - state->range_startk;
- return;
- }
- /* Write the range mtrrs */
- if (state->range_sizek != 0)
- second_sizek = range_to_mtrr_with_hole(state, basek, sizek);
-
- /* Allocate an msr */
- state->range_startk = basek + second_sizek;
- state->range_sizek = sizek - second_sizek;
-}
-
-/* mininum size of mtrr block that can take hole */
-static u64 mtrr_chunk_size __initdata = (256ULL<<20);
-
-static int __init parse_mtrr_chunk_size_opt(char *p)
-{
- if (!p)
- return -EINVAL;
- mtrr_chunk_size = memparse(p, &p);
- return 0;
-}
-early_param("mtrr_chunk_size", parse_mtrr_chunk_size_opt);
-
-/* granity of mtrr of block */
-static u64 mtrr_gran_size __initdata;
-
-static int __init parse_mtrr_gran_size_opt(char *p)
-{
- if (!p)
- return -EINVAL;
- mtrr_gran_size = memparse(p, &p);
- return 0;
-}
-early_param("mtrr_gran_size", parse_mtrr_gran_size_opt);
-
-static int nr_mtrr_spare_reg __initdata =
- CONFIG_MTRR_SANITIZER_SPARE_REG_NR_DEFAULT;
-
-static int __init parse_mtrr_spare_reg(char *arg)
-{
- if (arg)
- nr_mtrr_spare_reg = simple_strtoul(arg, NULL, 0);
- return 0;
-}
-
-early_param("mtrr_spare_reg_nr", parse_mtrr_spare_reg);
-
-static int __init
-x86_setup_var_mtrrs(struct res_range *range, int nr_range,
- u64 chunk_size, u64 gran_size)
-{
- struct var_mtrr_state var_state;
- int i;
- int num_reg;
-
- var_state.range_startk = 0;
- var_state.range_sizek = 0;
- var_state.reg = 0;
- var_state.chunk_sizek = chunk_size >> 10;
- var_state.gran_sizek = gran_size >> 10;
-
- memset(range_state, 0, sizeof(range_state));
-
- /* Write the range etc */
- for (i = 0; i < nr_range; i++)
- set_var_mtrr_range(&var_state, range[i].start,
- range[i].end - range[i].start + 1);
-
- /* Write the last range */
- if (var_state.range_sizek != 0)
- range_to_mtrr_with_hole(&var_state, 0, 0);
-
- num_reg = var_state.reg;
- /* Clear out the extra MTRR's */
- while (var_state.reg < num_var_ranges) {
- save_var_mtrr(var_state.reg, 0, 0, 0);
- var_state.reg++;
- }
-
- return num_reg;
-}
-
-struct mtrr_cleanup_result {
- unsigned long gran_sizek;
- unsigned long chunk_sizek;
- unsigned long lose_cover_sizek;
- unsigned int num_reg;
- int bad;
-};
-
-/*
- * gran_size: 64K, 128K, 256K, 512K, 1M, 2M, ..., 2G
- * chunk size: gran_size, ..., 2G
- * so we need (1+16)*8
- */
-#define NUM_RESULT 136
-#define PSHIFT (PAGE_SHIFT - 10)
-
-static struct mtrr_cleanup_result __initdata result[NUM_RESULT];
-static unsigned long __initdata min_loss_pfn[RANGE_NUM];
-
-static void __init print_out_mtrr_range_state(void)
-{
- int i;
- char start_factor = 'K', size_factor = 'K';
- unsigned long start_base, size_base;
- mtrr_type type;
-
- for (i = 0; i < num_var_ranges; i++) {
-
- size_base = range_state[i].size_pfn << (PAGE_SHIFT - 10);
- if (!size_base)
- continue;
-
- size_base = to_size_factor(size_base, &size_factor),
- start_base = range_state[i].base_pfn << (PAGE_SHIFT - 10);
- start_base = to_size_factor(start_base, &start_factor),
- type = range_state[i].type;
-
- printk(KERN_DEBUG "reg %d, base: %ld%cB, range: %ld%cB, type %s\n",
- i, start_base, start_factor,
- size_base, size_factor,
- (type == MTRR_TYPE_UNCACHABLE) ? "UC" :
- ((type == MTRR_TYPE_WRPROT) ? "WP" :
- ((type == MTRR_TYPE_WRBACK) ? "WB" : "Other"))
- );
- }
-}
-
-static int __init mtrr_need_cleanup(void)
-{
- int i;
- mtrr_type type;
- unsigned long size;
- /* extra one for all 0 */
- int num[MTRR_NUM_TYPES + 1];
-
- /* check entries number */
- memset(num, 0, sizeof(num));
- for (i = 0; i < num_var_ranges; i++) {
- type = range_state[i].type;
- size = range_state[i].size_pfn;
- if (type >= MTRR_NUM_TYPES)
- continue;
- if (!size)
- type = MTRR_NUM_TYPES;
- if (type == MTRR_TYPE_WRPROT)
- type = MTRR_TYPE_UNCACHABLE;
- num[type]++;
- }
-
- /* check if we got UC entries */
- if (!num[MTRR_TYPE_UNCACHABLE])
- return 0;
-
- /* check if we only had WB and UC */
- if (num[MTRR_TYPE_WRBACK] + num[MTRR_TYPE_UNCACHABLE] !=
- num_var_ranges - num[MTRR_NUM_TYPES])
- return 0;
-
- return 1;
-}
-
-static unsigned long __initdata range_sums;
-static void __init mtrr_calc_range_state(u64 chunk_size, u64 gran_size,
- unsigned long extra_remove_base,
- unsigned long extra_remove_size,
- int i)
-{
- int num_reg;
- static struct res_range range_new[RANGE_NUM];
- static int nr_range_new;
- unsigned long range_sums_new;
-
- /* convert ranges to var ranges state */
- num_reg = x86_setup_var_mtrrs(range, nr_range,
- chunk_size, gran_size);
-
- /* we got new setting in range_state, check it */
- memset(range_new, 0, sizeof(range_new));
- nr_range_new = x86_get_mtrr_mem_range(range_new, 0,
- extra_remove_base, extra_remove_size);
- range_sums_new = sum_ranges(range_new, nr_range_new);
-
- result[i].chunk_sizek = chunk_size >> 10;
- result[i].gran_sizek = gran_size >> 10;
- result[i].num_reg = num_reg;
- if (range_sums < range_sums_new) {
- result[i].lose_cover_sizek =
- (range_sums_new - range_sums) << PSHIFT;
- result[i].bad = 1;
- } else
- result[i].lose_cover_sizek =
- (range_sums - range_sums_new) << PSHIFT;
-
- /* double check it */
- if (!result[i].bad && !result[i].lose_cover_sizek) {
- if (nr_range_new != nr_range ||
- memcmp(range, range_new, sizeof(range)))
- result[i].bad = 1;
- }
-
- if (!result[i].bad && (range_sums - range_sums_new <
- min_loss_pfn[num_reg])) {
- min_loss_pfn[num_reg] =
- range_sums - range_sums_new;
- }
-}
-
-static void __init mtrr_print_out_one_result(int i)
-{
- char gran_factor, chunk_factor, lose_factor;
- unsigned long gran_base, chunk_base, lose_base;
-
- gran_base = to_size_factor(result[i].gran_sizek, &gran_factor),
- chunk_base = to_size_factor(result[i].chunk_sizek, &chunk_factor),
- lose_base = to_size_factor(result[i].lose_cover_sizek, &lose_factor),
- printk(KERN_INFO "%sgran_size: %ld%c \tchunk_size: %ld%c \t",
- result[i].bad ? "*BAD*" : " ",
- gran_base, gran_factor, chunk_base, chunk_factor);
- printk(KERN_CONT "num_reg: %d \tlose cover RAM: %s%ld%c\n",
- result[i].num_reg, result[i].bad ? "-" : "",
- lose_base, lose_factor);
-}
-
-static int __init mtrr_search_optimal_index(void)
-{
- int i;
- int num_reg_good;
- int index_good;
-
- if (nr_mtrr_spare_reg >= num_var_ranges)
- nr_mtrr_spare_reg = num_var_ranges - 1;
- num_reg_good = -1;
- for (i = num_var_ranges - nr_mtrr_spare_reg; i > 0; i--) {
- if (!min_loss_pfn[i])
- num_reg_good = i;
- }
-
- index_good = -1;
- if (num_reg_good != -1) {
- for (i = 0; i < NUM_RESULT; i++) {
- if (!result[i].bad &&
- result[i].num_reg == num_reg_good &&
- !result[i].lose_cover_sizek) {
- index_good = i;
- break;
- }
- }
- }
-
- return index_good;
-}
-
-
-static int __init mtrr_cleanup(unsigned address_bits)
-{
- unsigned long extra_remove_base, extra_remove_size;
- unsigned long base, size, def, dummy;
- mtrr_type type;
- u64 chunk_size, gran_size;
- int index_good;
- int i;
-
- if (!is_cpu(INTEL) || enable_mtrr_cleanup < 1)
- return 0;
- rdmsr(MTRRdefType_MSR, def, dummy);
- def &= 0xff;
- if (def != MTRR_TYPE_UNCACHABLE)
- return 0;
-
- /* get it and store it aside */
- memset(range_state, 0, sizeof(range_state));
- for (i = 0; i < num_var_ranges; i++) {
- mtrr_if->get(i, &base, &size, &type);
- range_state[i].base_pfn = base;
- range_state[i].size_pfn = size;
- range_state[i].type = type;
- }
-
- /* check if we need handle it and can handle it */
- if (!mtrr_need_cleanup())
- return 0;
-
- /* print original var MTRRs at first, for debugging: */
- printk(KERN_DEBUG "original variable MTRRs\n");
- print_out_mtrr_range_state();
-
- memset(range, 0, sizeof(range));
- extra_remove_size = 0;
- extra_remove_base = 1 << (32 - PAGE_SHIFT);
- if (mtrr_tom2)
- extra_remove_size =
- (mtrr_tom2 >> PAGE_SHIFT) - extra_remove_base;
- nr_range = x86_get_mtrr_mem_range(range, 0, extra_remove_base,
- extra_remove_size);
- /*
- * [0, 1M) should always be coverred by var mtrr with WB
- * and fixed mtrrs should take effective before var mtrr for it
- */
- nr_range = add_range_with_merge(range, nr_range, 0,
- (1ULL<<(20 - PAGE_SHIFT)) - 1);
- /* sort the ranges */
- sort(range, nr_range, sizeof(struct res_range), cmp_range, NULL);
-
- range_sums = sum_ranges(range, nr_range);
- printk(KERN_INFO "total RAM coverred: %ldM\n",
- range_sums >> (20 - PAGE_SHIFT));
-
- if (mtrr_chunk_size && mtrr_gran_size) {
- i = 0;
- mtrr_calc_range_state(mtrr_chunk_size, mtrr_gran_size,
- extra_remove_base, extra_remove_size, i);
-
- mtrr_print_out_one_result(i);
-
- if (!result[i].bad) {
- set_var_mtrr_all(address_bits);
- return 1;
- }
- printk(KERN_INFO "invalid mtrr_gran_size or mtrr_chunk_size, "
- "will find optimal one\n");
- }
-
- i = 0;
- memset(min_loss_pfn, 0xff, sizeof(min_loss_pfn));
- memset(result, 0, sizeof(result));
- for (gran_size = (1ULL<<16); gran_size < (1ULL<<32); gran_size <<= 1) {
-
- for (chunk_size = gran_size; chunk_size < (1ULL<<32);
- chunk_size <<= 1) {
-
- if (i >= NUM_RESULT)
- continue;
-
- mtrr_calc_range_state(chunk_size, gran_size,
- extra_remove_base, extra_remove_size, i);
- if (debug_print) {
- mtrr_print_out_one_result(i);
- printk(KERN_INFO "\n");
- }
-
- i++;
- }
- }
-
- /* try to find the optimal index */
- index_good = mtrr_search_optimal_index();
-
- if (index_good != -1) {
- printk(KERN_INFO "Found optimal setting for mtrr clean up\n");
- i = index_good;
- mtrr_print_out_one_result(i);
-
- /* convert ranges to var ranges state */
- chunk_size = result[i].chunk_sizek;
- chunk_size <<= 10;
- gran_size = result[i].gran_sizek;
- gran_size <<= 10;
- x86_setup_var_mtrrs(range, nr_range, chunk_size, gran_size);
- set_var_mtrr_all(address_bits);
- printk(KERN_DEBUG "New variable MTRRs\n");
- print_out_mtrr_range_state();
- return 1;
- } else {
- /* print out all */
- for (i = 0; i < NUM_RESULT; i++)
- mtrr_print_out_one_result(i);
- }
-
- printk(KERN_INFO "mtrr_cleanup: can not find optimal value\n");
- printk(KERN_INFO "please specify mtrr_gran_size/mtrr_chunk_size\n");
-
- return 0;
-}
-#else
-static int __init mtrr_cleanup(unsigned address_bits)
-{
- return 0;
-}
-#endif
-
-static int __initdata changed_by_mtrr_cleanup;
-
-static int disable_mtrr_trim;
-
-static int __init disable_mtrr_trim_setup(char *str)
-{
- disable_mtrr_trim = 1;
- return 0;
-}
-early_param("disable_mtrr_trim", disable_mtrr_trim_setup);
-
-/*
- * Newer AMD K8s and later CPUs have a special magic MSR way to force WB
- * for memory >4GB. Check for that here.
- * Note this won't check if the MTRRs < 4GB where the magic bit doesn't
- * apply to are wrong, but so far we don't know of any such case in the wild.
- */
-#define Tom2Enabled (1U << 21)
-#define Tom2ForceMemTypeWB (1U << 22)
-
-int __init amd_special_default_mtrr(void)
-{
- u32 l, h;
-
- if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD)
- return 0;
- if (boot_cpu_data.x86 < 0xf || boot_cpu_data.x86 > 0x11)
- return 0;
- /* In case some hypervisor doesn't pass SYSCFG through */
- if (rdmsr_safe(MSR_K8_SYSCFG, &l, &h) < 0)
- return 0;
- /*
- * Memory between 4GB and top of mem is forced WB by this magic bit.
- * Reserved before K8RevF, but should be zero there.
- */
- if ((l & (Tom2Enabled | Tom2ForceMemTypeWB)) ==
- (Tom2Enabled | Tom2ForceMemTypeWB))
- return 1;
- return 0;
-}
-
-static u64 __init real_trim_memory(unsigned long start_pfn,
- unsigned long limit_pfn)
-{
- u64 trim_start, trim_size;
- trim_start = start_pfn;
- trim_start <<= PAGE_SHIFT;
- trim_size = limit_pfn;
- trim_size <<= PAGE_SHIFT;
- trim_size -= trim_start;
-
- return e820_update_range(trim_start, trim_size, E820_RAM,
- E820_RESERVED);
-}
-/**
- * mtrr_trim_uncached_memory - trim RAM not covered by MTRRs
- * @end_pfn: ending page frame number
- *
- * Some buggy BIOSes don't setup the MTRRs properly for systems with certain
- * memory configurations. This routine checks that the highest MTRR matches
- * the end of memory, to make sure the MTRRs having a write back type cover
- * all of the memory the kernel is intending to use. If not, it'll trim any
- * memory off the end by adjusting end_pfn, removing it from the kernel's
- * allocation pools, warning the user with an obnoxious message.
- */
-int __init mtrr_trim_uncached_memory(unsigned long end_pfn)
-{
- unsigned long i, base, size, highest_pfn = 0, def, dummy;
- mtrr_type type;
- u64 total_trim_size;
-
- /* extra one for all 0 */
- int num[MTRR_NUM_TYPES + 1];
- /*
- * Make sure we only trim uncachable memory on machines that
- * support the Intel MTRR architecture:
- */
- if (!is_cpu(INTEL) || disable_mtrr_trim)
- return 0;
- rdmsr(MTRRdefType_MSR, def, dummy);
- def &= 0xff;
- if (def != MTRR_TYPE_UNCACHABLE)
- return 0;
-
- /* get it and store it aside */
- memset(range_state, 0, sizeof(range_state));
- for (i = 0; i < num_var_ranges; i++) {
- mtrr_if->get(i, &base, &size, &type);
- range_state[i].base_pfn = base;
- range_state[i].size_pfn = size;
- range_state[i].type = type;
- }
-
- /* Find highest cached pfn */
- for (i = 0; i < num_var_ranges; i++) {
- type = range_state[i].type;
- if (type != MTRR_TYPE_WRBACK)
- continue;
- base = range_state[i].base_pfn;
- size = range_state[i].size_pfn;
- if (highest_pfn < base + size)
- highest_pfn = base + size;
- }
-
- /* kvm/qemu doesn't have mtrr set right, don't trim them all */
- if (!highest_pfn) {
- printk(KERN_INFO "CPU MTRRs all blank - virtualized system.\n");
- return 0;
- }
-
- /* check entries number */
- memset(num, 0, sizeof(num));
- for (i = 0; i < num_var_ranges; i++) {
- type = range_state[i].type;
- if (type >= MTRR_NUM_TYPES)
- continue;
- size = range_state[i].size_pfn;
- if (!size)
- type = MTRR_NUM_TYPES;
- num[type]++;
- }
-
- /* no entry for WB? */
- if (!num[MTRR_TYPE_WRBACK])
- return 0;
-
- /* check if we only had WB and UC */
- if (num[MTRR_TYPE_WRBACK] + num[MTRR_TYPE_UNCACHABLE] !=
- num_var_ranges - num[MTRR_NUM_TYPES])
- return 0;
-
- memset(range, 0, sizeof(range));
- nr_range = 0;
- if (mtrr_tom2) {
- range[nr_range].start = (1ULL<<(32 - PAGE_SHIFT));
- range[nr_range].end = (mtrr_tom2 >> PAGE_SHIFT) - 1;
- if (highest_pfn < range[nr_range].end + 1)
- highest_pfn = range[nr_range].end + 1;
- nr_range++;
- }
- nr_range = x86_get_mtrr_mem_range(range, nr_range, 0, 0);
-
- total_trim_size = 0;
- /* check the head */
- if (range[0].start)
- total_trim_size += real_trim_memory(0, range[0].start);
- /* check the holes */
- for (i = 0; i < nr_range - 1; i++) {
- if (range[i].end + 1 < range[i+1].start)
- total_trim_size += real_trim_memory(range[i].end + 1,
- range[i+1].start);
- }
- /* check the top */
- i = nr_range - 1;
- if (range[i].end + 1 < end_pfn)
- total_trim_size += real_trim_memory(range[i].end + 1,
- end_pfn);
-
- if (total_trim_size) {
- printk(KERN_WARNING "WARNING: BIOS bug: CPU MTRRs don't cover"
- " all of memory, losing %lluMB of RAM.\n",
- total_trim_size >> 20);
-
- if (!changed_by_mtrr_cleanup)
- WARN_ON(1);
-
- printk(KERN_INFO "update e820 for mtrr\n");
- update_e820();
-
- return 1;
- }
-
- return 0;
-}
+int __initdata changed_by_mtrr_cleanup;
/**
* mtrr_bp_init - initialize mtrrs on the boot CPU
diff --git a/arch/x86/kernel/cpu/mtrr/mtrr.h b/arch/x86/kernel/cpu/mtrr/mtrr.h
index ffd60409cc6d..77f67f7b347a 100644
--- a/arch/x86/kernel/cpu/mtrr/mtrr.h
+++ b/arch/x86/kernel/cpu/mtrr/mtrr.h
@@ -79,6 +79,7 @@ extern struct mtrr_ops * mtrr_if;
extern unsigned int num_var_ranges;
extern u64 mtrr_tom2;
+extern struct mtrr_state_type mtrr_state;
void mtrr_state_warn(void);
const char *mtrr_attrib_to_str(int x);
@@ -88,3 +89,6 @@ void mtrr_wrmsr(unsigned, unsigned, unsigned);
int amd_init_mtrr(void);
int cyrix_init_mtrr(void);
int centaur_init_mtrr(void);
+
+extern int changed_by_mtrr_cleanup;
+extern int mtrr_cleanup(unsigned address_bits);
diff --git a/arch/x86/kernel/cpu/proc.c b/arch/x86/kernel/cpu/proc.c
index d67e0e48bc2d..f93047fed791 100644
--- a/arch/x86/kernel/cpu/proc.c
+++ b/arch/x86/kernel/cpu/proc.c
@@ -14,7 +14,7 @@ static void show_cpuinfo_core(struct seq_file *m, struct cpuinfo_x86 *c,
if (c->x86_max_cores * smp_num_siblings > 1) {
seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
seq_printf(m, "siblings\t: %d\n",
- cpus_weight(per_cpu(cpu_core_map, cpu)));
+ cpumask_weight(cpu_sibling_mask(cpu)));
seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
seq_printf(m, "apicid\t\t: %d\n", c->apicid);
@@ -143,9 +143,9 @@ static int show_cpuinfo(struct seq_file *m, void *v)
static void *c_start(struct seq_file *m, loff_t *pos)
{
if (*pos == 0) /* just in case, cpu 0 is not the first */
- *pos = first_cpu(cpu_online_map);
+ *pos = cpumask_first(cpu_online_mask);
else
- *pos = next_cpu_nr(*pos - 1, cpu_online_map);
+ *pos = cpumask_next(*pos - 1, cpu_online_mask);
if ((*pos) < nr_cpu_ids)
return &cpu_data(*pos);
return NULL;
diff --git a/arch/x86/kernel/cpu/transmeta.c b/arch/x86/kernel/cpu/transmeta.c
index 52b3fefbd5af..bb62b3e5caad 100644
--- a/arch/x86/kernel/cpu/transmeta.c
+++ b/arch/x86/kernel/cpu/transmeta.c
@@ -98,7 +98,7 @@ static void __cpuinit init_transmeta(struct cpuinfo_x86 *c)
#endif
}
-static struct cpu_dev transmeta_cpu_dev __cpuinitdata = {
+static const struct cpu_dev __cpuinitconst transmeta_cpu_dev = {
.c_vendor = "Transmeta",
.c_ident = { "GenuineTMx86", "TransmetaCPU" },
.c_early_init = early_init_transmeta,
diff --git a/arch/x86/kernel/cpu/umc.c b/arch/x86/kernel/cpu/umc.c
index e777f79e0960..fd2c37bf7acb 100644
--- a/arch/x86/kernel/cpu/umc.c
+++ b/arch/x86/kernel/cpu/umc.c
@@ -8,7 +8,7 @@
* so no special init takes place.
*/
-static struct cpu_dev umc_cpu_dev __cpuinitdata = {
+static const struct cpu_dev __cpuinitconst umc_cpu_dev = {
.c_vendor = "UMC",
.c_ident = { "UMC UMC UMC" },
.c_models = {