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authorIngo Molnar <mingo@elte.hu>2008-12-25 12:48:18 +0100
committerIngo Molnar <mingo@elte.hu>2008-12-25 12:48:18 +0100
commita3eeeefbf1cd1d142c52238cc19c75d14c3bc8d5 (patch)
tree28eedba6d432e9d9d772962e6f92732aef1be065 /arch
parent30cd324e9787ccc9a5ede59742d5409857550692 (diff)
parent7e3cbc3f774f31ecd88a51edae3d9377f60a4c00 (diff)
Merge branch 'x86/tsc' into tracing/core
Merge it to resolve this incidental conflict between the BTS fixes/cleanups and changes in x86/tsc: Conflicts: arch/x86/kernel/cpu/intel.c
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/include/asm/cpufeature.h5
-rw-r--r--arch/x86/kernel/cpu/addon_cpuid_features.c8
-rw-r--r--arch/x86/kernel/cpu/amd.c9
-rw-r--r--arch/x86/kernel/cpu/intel.c18
-rw-r--r--arch/x86/kernel/process.c2
5 files changed, 37 insertions, 5 deletions
diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h
index cfdf8c2c5c31..ea408dcba513 100644
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -80,7 +80,6 @@
#define X86_FEATURE_UP (3*32+ 9) /* smp kernel running on up */
#define X86_FEATURE_FXSAVE_LEAK (3*32+10) /* "" FXSAVE leaks FOP/FIP/FOP */
#define X86_FEATURE_ARCH_PERFMON (3*32+11) /* Intel Architectural PerfMon */
-#define X86_FEATURE_NOPL (3*32+20) /* The NOPL (0F 1F) instructions */
#define X86_FEATURE_PEBS (3*32+12) /* Precise-Event Based Sampling */
#define X86_FEATURE_BTS (3*32+13) /* Branch Trace Store */
#define X86_FEATURE_SYSCALL32 (3*32+14) /* "" syscall in ia32 userspace */
@@ -92,6 +91,8 @@
#define X86_FEATURE_NOPL (3*32+20) /* The NOPL (0F 1F) instructions */
#define X86_FEATURE_AMDC1E (3*32+21) /* AMD C1E detected */
#define X86_FEATURE_XTOPOLOGY (3*32+22) /* cpu topology enum extensions */
+#define X86_FEATURE_TSC_RELIABLE (3*32+23) /* TSC is known to be reliable */
+#define X86_FEATURE_NONSTOP_TSC (3*32+24) /* TSC does not stop in C states */
/* Intel-defined CPU features, CPUID level 0x00000001 (ecx), word 4 */
#define X86_FEATURE_XMM3 (4*32+ 0) /* "pni" SSE-3 */
@@ -117,6 +118,7 @@
#define X86_FEATURE_XSAVE (4*32+26) /* XSAVE/XRSTOR/XSETBV/XGETBV */
#define X86_FEATURE_OSXSAVE (4*32+27) /* "" XSAVE enabled in the OS */
#define X86_FEATURE_AVX (4*32+28) /* Advanced Vector Extensions */
+#define X86_FEATURE_HYPERVISOR (4*32+31) /* Running on a hypervisor */
/* VIA/Cyrix/Centaur-defined CPU features, CPUID level 0xC0000001, word 5 */
#define X86_FEATURE_XSTORE (5*32+ 2) /* "rng" RNG present (xstore) */
@@ -237,6 +239,7 @@ extern const char * const x86_power_flags[32];
#define cpu_has_xmm4_2 boot_cpu_has(X86_FEATURE_XMM4_2)
#define cpu_has_x2apic boot_cpu_has(X86_FEATURE_X2APIC)
#define cpu_has_xsave boot_cpu_has(X86_FEATURE_XSAVE)
+#define cpu_has_hypervisor boot_cpu_has(X86_FEATURE_HYPERVISOR)
#if defined(CONFIG_X86_INVLPG) || defined(CONFIG_X86_64)
# define cpu_has_invlpg 1
diff --git a/arch/x86/kernel/cpu/addon_cpuid_features.c b/arch/x86/kernel/cpu/addon_cpuid_features.c
index ef8f831af823..2cf23634b6d9 100644
--- a/arch/x86/kernel/cpu/addon_cpuid_features.c
+++ b/arch/x86/kernel/cpu/addon_cpuid_features.c
@@ -120,9 +120,17 @@ void __cpuinit detect_extended_topology(struct cpuinfo_x86 *c)
c->cpu_core_id = phys_pkg_id(c->initial_apicid, ht_mask_width)
& core_select_mask;
c->phys_proc_id = phys_pkg_id(c->initial_apicid, core_plus_mask_width);
+ /*
+ * Reinit the apicid, now that we have extended initial_apicid.
+ */
+ c->apicid = phys_pkg_id(c->initial_apicid, 0);
#else
c->cpu_core_id = phys_pkg_id(ht_mask_width) & core_select_mask;
c->phys_proc_id = phys_pkg_id(core_plus_mask_width);
+ /*
+ * Reinit the apicid, now that we have extended initial_apicid.
+ */
+ c->apicid = phys_pkg_id(0);
#endif
c->x86_max_cores = (core_level_siblings / smp_num_siblings);
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index 8f1e31db2ad5..7c878f6aa919 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -283,9 +283,14 @@ static void __cpuinit early_init_amd(struct cpuinfo_x86 *c)
{
early_init_amd_mc(c);
- /* c->x86_power is 8000_0007 edx. Bit 8 is constant TSC */
- if (c->x86_power & (1<<8))
+ /*
+ * 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
+ */
+ if (c->x86_power & (1 << 8)) {
set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
+ set_cpu_cap(c, X86_FEATURE_NONSTOP_TSC);
+ }
#ifdef CONFIG_X86_64
set_cpu_cap(c, X86_FEATURE_SYSCALL32);
diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index cd413d9a0218..8ea6929e974c 100644
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -40,6 +40,16 @@ static void __cpuinit early_init_intel(struct cpuinfo_x86 *c)
if (c->x86 == 15 && c->x86_cache_alignment == 64)
c->x86_cache_alignment = 128;
#endif
+
+ /*
+ * 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
+ */
+ if (c->x86_power & (1 << 8)) {
+ set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
+ set_cpu_cap(c, X86_FEATURE_NONSTOP_TSC);
+ }
+
}
#ifdef CONFIG_X86_32
@@ -241,6 +251,13 @@ static void __cpuinit init_intel(struct cpuinfo_x86 *c)
intel_workarounds(c);
+ /*
+ * Detect the extended topology information if available. This
+ * will reinitialise the initial_apicid which will be used
+ * in init_intel_cacheinfo()
+ */
+ detect_extended_topology(c);
+
l2 = init_intel_cacheinfo(c);
if (c->cpuid_level > 9) {
unsigned eax = cpuid_eax(10);
@@ -308,7 +325,6 @@ static void __cpuinit init_intel(struct cpuinfo_x86 *c)
set_cpu_cap(c, X86_FEATURE_P3);
#endif
- detect_extended_topology(c);
if (!cpu_has(c, X86_FEATURE_XTOPOLOGY)) {
/*
* let's use the legacy cpuid vector 0x1 and 0x4 for topology
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index c27af49a4ede..cff9a50e389d 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -286,7 +286,7 @@ static void c1e_idle(void)
rdmsr(MSR_K8_INT_PENDING_MSG, lo, hi);
if (lo & K8_INTP_C1E_ACTIVE_MASK) {
c1e_detected = 1;
- if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC))
+ if (!boot_cpu_has(X86_FEATURE_NONSTOP_TSC))
mark_tsc_unstable("TSC halt in AMD C1E");
printk(KERN_INFO "System has AMD C1E enabled\n");
set_cpu_cap(&boot_cpu_data, X86_FEATURE_AMDC1E);