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-rw-r--r--arch/tile/include/asm/Kbuild1
-rw-r--r--arch/tile/include/asm/compat.h2
-rw-r--r--arch/tile/include/asm/dma-mapping.h1
-rw-r--r--arch/tile/include/asm/elf.h2
-rw-r--r--arch/tile/include/asm/ptrace.h3
-rw-r--r--arch/tile/include/asm/unistd.h1
-rw-r--r--arch/tile/include/uapi/asm/ptrace.h8
-rw-r--r--arch/tile/kernel/compat.c18
-rw-r--r--arch/tile/kernel/module.c2
-rw-r--r--arch/tile/kernel/pci.c4
-rw-r--r--arch/tile/kernel/pci_gx.c3
-rw-r--r--arch/tile/kernel/ptrace.c140
-rw-r--r--arch/tile/mm/hugetlbpage.c139
13 files changed, 154 insertions, 170 deletions
diff --git a/arch/tile/include/asm/Kbuild b/arch/tile/include/asm/Kbuild
index 6948015e08a2..b17b9b8e53cd 100644
--- a/arch/tile/include/asm/Kbuild
+++ b/arch/tile/include/asm/Kbuild
@@ -34,5 +34,6 @@ generic-y += sockios.h
generic-y += statfs.h
generic-y += termbits.h
generic-y += termios.h
+generic-y += trace_clock.h
generic-y += types.h
generic-y += xor.h
diff --git a/arch/tile/include/asm/compat.h b/arch/tile/include/asm/compat.h
index ca61fb4296b3..88f3c227afd9 100644
--- a/arch/tile/include/asm/compat.h
+++ b/arch/tile/include/asm/compat.h
@@ -296,8 +296,6 @@ long compat_sys_sync_file_range2(int fd, unsigned int flags,
long compat_sys_fallocate(int fd, int mode,
u32 offset_lo, u32 offset_hi,
u32 len_lo, u32 len_hi);
-long compat_sys_sched_rr_get_interval(compat_pid_t pid,
- struct compat_timespec __user *interval);
/* Assembly trampoline to avoid clobbering r0. */
long _compat_sys_rt_sigreturn(void);
diff --git a/arch/tile/include/asm/dma-mapping.h b/arch/tile/include/asm/dma-mapping.h
index 4b6247d1a315..f2ff191376b4 100644
--- a/arch/tile/include/asm/dma-mapping.h
+++ b/arch/tile/include/asm/dma-mapping.h
@@ -72,6 +72,7 @@ static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
static inline int
dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
+ debug_dma_mapping_error(dev, dma_addr);
return get_dma_ops(dev)->mapping_error(dev, dma_addr);
}
diff --git a/arch/tile/include/asm/elf.h b/arch/tile/include/asm/elf.h
index b73e1039c911..ff8a93408823 100644
--- a/arch/tile/include/asm/elf.h
+++ b/arch/tile/include/asm/elf.h
@@ -170,4 +170,6 @@ do { \
#endif /* CONFIG_COMPAT */
+#define CORE_DUMP_USE_REGSET
+
#endif /* _ASM_TILE_ELF_H */
diff --git a/arch/tile/include/asm/ptrace.h b/arch/tile/include/asm/ptrace.h
index 3f792b6d60d5..2e83fc1b9467 100644
--- a/arch/tile/include/asm/ptrace.h
+++ b/arch/tile/include/asm/ptrace.h
@@ -24,8 +24,7 @@ typedef unsigned long pt_reg_t;
#include <uapi/asm/ptrace.h>
#define PTRACE_O_MASK_TILE (PTRACE_O_TRACEMIGRATE)
-#define PT_TRACE_MIGRATE 0x00080000
-#define PT_TRACE_MASK_TILE (PT_TRACE_MIGRATE)
+#define PT_TRACE_MIGRATE PT_EVENT_FLAG(PTRACE_EVENT_MIGRATE)
/* Flag bits in pt_regs.flags */
#define PT_FLAGS_DISABLE_IRQ 1 /* on return to kernel, disable irqs */
diff --git a/arch/tile/include/asm/unistd.h b/arch/tile/include/asm/unistd.h
index 940831fe9e94..6ac21034f69a 100644
--- a/arch/tile/include/asm/unistd.h
+++ b/arch/tile/include/asm/unistd.h
@@ -14,6 +14,7 @@
/* In compat mode, we use sys_llseek() for compat_sys_llseek(). */
#ifdef CONFIG_COMPAT
#define __ARCH_WANT_SYS_LLSEEK
+#define __ARCH_WANT_COMPAT_SYS_SCHED_RR_GET_INTERVAL
#endif
#define __ARCH_WANT_SYS_NEWFSTATAT
#define __ARCH_WANT_SYS_CLONE
diff --git a/arch/tile/include/uapi/asm/ptrace.h b/arch/tile/include/uapi/asm/ptrace.h
index c717d0fec72e..7757e1985fb6 100644
--- a/arch/tile/include/uapi/asm/ptrace.h
+++ b/arch/tile/include/uapi/asm/ptrace.h
@@ -81,8 +81,14 @@ struct pt_regs {
#define PTRACE_SETFPREGS 15
/* Support TILE-specific ptrace options, with events starting at 16. */
-#define PTRACE_O_TRACEMIGRATE 0x00010000
#define PTRACE_EVENT_MIGRATE 16
+#define PTRACE_O_TRACEMIGRATE (1 << PTRACE_EVENT_MIGRATE)
+/*
+ * Flag bits in pt_regs.flags that are part of the ptrace API.
+ * We start our numbering higher up to avoid confusion with the
+ * non-ABI kernel-internal values that use the low 16 bits.
+ */
+#define PT_FLAGS_COMPAT 0x10000 /* process is an -m32 compat process */
#endif /* _UAPI_ASM_TILE_PTRACE_H */
diff --git a/arch/tile/kernel/compat.c b/arch/tile/kernel/compat.c
index 9cd7cb6041c0..7f72401b4f45 100644
--- a/arch/tile/kernel/compat.c
+++ b/arch/tile/kernel/compat.c
@@ -76,24 +76,6 @@ long compat_sys_fallocate(int fd, int mode,
((loff_t)len_hi << 32) | len_lo);
}
-
-
-long compat_sys_sched_rr_get_interval(compat_pid_t pid,
- struct compat_timespec __user *interval)
-{
- struct timespec t;
- int ret;
- mm_segment_t old_fs = get_fs();
-
- set_fs(KERNEL_DS);
- ret = sys_sched_rr_get_interval(pid,
- (struct timespec __force __user *)&t);
- set_fs(old_fs);
- if (put_compat_timespec(&t, interval))
- return -EFAULT;
- return ret;
-}
-
/* Provide the compat syscall number to call mapping. */
#undef __SYSCALL
#define __SYSCALL(nr, call) [nr] = (call),
diff --git a/arch/tile/kernel/module.c b/arch/tile/kernel/module.c
index 243ffebe38d6..4918d91bc3a6 100644
--- a/arch/tile/kernel/module.c
+++ b/arch/tile/kernel/module.c
@@ -42,8 +42,6 @@ void *module_alloc(unsigned long size)
int i = 0;
int npages;
- if (size == 0)
- return NULL;
npages = (size + PAGE_SIZE - 1) / PAGE_SIZE;
pages = kmalloc(npages * sizeof(struct page *), GFP_KERNEL);
if (pages == NULL)
diff --git a/arch/tile/kernel/pci.c b/arch/tile/kernel/pci.c
index 759822687e8f..aac1cd586966 100644
--- a/arch/tile/kernel/pci.c
+++ b/arch/tile/kernel/pci.c
@@ -245,7 +245,7 @@ static void __devinit fixup_read_and_payload_sizes(void)
u16 new_values;
/* Scan for the smallest maximum payload size. */
- while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
+ for_each_pci_dev(dev) {
u32 devcap;
int max_payload;
@@ -260,7 +260,7 @@ static void __devinit fixup_read_and_payload_sizes(void)
/* Now, set the max_payload_size for all devices to that value. */
new_values = (max_read_size << 12) | (smallest_max_payload << 5);
- while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL)
+ for_each_pci_dev(dev)
pcie_capability_clear_and_set_word(dev, PCI_EXP_DEVCTL,
PCI_EXP_DEVCTL_PAYLOAD | PCI_EXP_DEVCTL_READRQ,
new_values);
diff --git a/arch/tile/kernel/pci_gx.c b/arch/tile/kernel/pci_gx.c
index 2ba6d052f85d..94810d4a6332 100644
--- a/arch/tile/kernel/pci_gx.c
+++ b/arch/tile/kernel/pci_gx.c
@@ -1047,8 +1047,7 @@ int pcibios_enable_device(struct pci_dev *dev, int mask)
}
/* Called for each device after PCI setup is done. */
-static void __init
-pcibios_fixup_final(struct pci_dev *pdev)
+static void pcibios_fixup_final(struct pci_dev *pdev)
{
set_dma_ops(&pdev->dev, gx_pci_dma_map_ops);
set_dma_offset(&pdev->dev, TILE_PCI_MEM_MAP_BASE_OFFSET);
diff --git a/arch/tile/kernel/ptrace.c b/arch/tile/kernel/ptrace.c
index e92e40527d6d..9835312d5a91 100644
--- a/arch/tile/kernel/ptrace.c
+++ b/arch/tile/kernel/ptrace.c
@@ -19,7 +19,10 @@
#include <linux/kprobes.h>
#include <linux/compat.h>
#include <linux/uaccess.h>
+#include <linux/regset.h>
+#include <linux/elf.h>
#include <asm/traps.h>
+#include <arch/chip.h>
void user_enable_single_step(struct task_struct *child)
{
@@ -45,6 +48,100 @@ void ptrace_disable(struct task_struct *child)
clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
}
+/*
+ * Get registers from task and ready the result for userspace.
+ * Note that we localize the API issues to getregs() and putregs() at
+ * some cost in performance, e.g. we need a full pt_regs copy for
+ * PEEKUSR, and two copies for POKEUSR. But in general we expect
+ * GETREGS/PUTREGS to be the API of choice anyway.
+ */
+static char *getregs(struct task_struct *child, struct pt_regs *uregs)
+{
+ *uregs = *task_pt_regs(child);
+
+ /* Set up flags ABI bits. */
+ uregs->flags = 0;
+#ifdef CONFIG_COMPAT
+ if (task_thread_info(child)->status & TS_COMPAT)
+ uregs->flags |= PT_FLAGS_COMPAT;
+#endif
+
+ return (char *)uregs;
+}
+
+/* Put registers back to task. */
+static void putregs(struct task_struct *child, struct pt_regs *uregs)
+{
+ struct pt_regs *regs = task_pt_regs(child);
+
+ /* Don't allow overwriting the kernel-internal flags word. */
+ uregs->flags = regs->flags;
+
+ /* Only allow setting the ICS bit in the ex1 word. */
+ uregs->ex1 = PL_ICS_EX1(USER_PL, EX1_ICS(uregs->ex1));
+
+ *regs = *uregs;
+}
+
+enum tile_regset {
+ REGSET_GPR,
+};
+
+static int tile_gpr_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ struct pt_regs regs;
+
+ getregs(target, &regs);
+
+ return user_regset_copyout(&pos, &count, &kbuf, &ubuf, &regs, 0,
+ sizeof(regs));
+}
+
+static int tile_gpr_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ int ret;
+ struct pt_regs regs;
+
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &regs, 0,
+ sizeof(regs));
+ if (ret)
+ return ret;
+
+ putregs(target, &regs);
+
+ return 0;
+}
+
+static const struct user_regset tile_user_regset[] = {
+ [REGSET_GPR] = {
+ .core_note_type = NT_PRSTATUS,
+ .n = ELF_NGREG,
+ .size = sizeof(elf_greg_t),
+ .align = sizeof(elf_greg_t),
+ .get = tile_gpr_get,
+ .set = tile_gpr_set,
+ },
+};
+
+static const struct user_regset_view tile_user_regset_view = {
+ .name = CHIP_ARCH_NAME,
+ .e_machine = ELF_ARCH,
+ .ei_osabi = ELF_OSABI,
+ .regsets = tile_user_regset,
+ .n = ARRAY_SIZE(tile_user_regset),
+};
+
+const struct user_regset_view *task_user_regset_view(struct task_struct *task)
+{
+ return &tile_user_regset_view;
+}
+
long arch_ptrace(struct task_struct *child, long request,
unsigned long addr, unsigned long data)
{
@@ -53,14 +150,13 @@ long arch_ptrace(struct task_struct *child, long request,
long ret = -EIO;
char *childreg;
struct pt_regs copyregs;
- int ex1_offset;
switch (request) {
case PTRACE_PEEKUSR: /* Read register from pt_regs. */
if (addr >= PTREGS_SIZE)
break;
- childreg = (char *)task_pt_regs(child) + addr;
+ childreg = getregs(child, &copyregs) + addr;
#ifdef CONFIG_COMPAT
if (is_compat_task()) {
if (addr & (sizeof(compat_long_t)-1))
@@ -79,17 +175,7 @@ long arch_ptrace(struct task_struct *child, long request,
case PTRACE_POKEUSR: /* Write register in pt_regs. */
if (addr >= PTREGS_SIZE)
break;
- childreg = (char *)task_pt_regs(child) + addr;
-
- /* Guard against overwrites of the privilege level. */
- ex1_offset = PTREGS_OFFSET_EX1;
-#if defined(CONFIG_COMPAT) && defined(__BIG_ENDIAN)
- if (is_compat_task()) /* point at low word */
- ex1_offset += sizeof(compat_long_t);
-#endif
- if (addr == ex1_offset)
- data = PL_ICS_EX1(USER_PL, EX1_ICS(data));
-
+ childreg = getregs(child, &copyregs) + addr;
#ifdef CONFIG_COMPAT
if (is_compat_task()) {
if (addr & (sizeof(compat_long_t)-1))
@@ -102,24 +188,20 @@ long arch_ptrace(struct task_struct *child, long request,
break;
*(long *)childreg = data;
}
+ putregs(child, &copyregs);
ret = 0;
break;
case PTRACE_GETREGS: /* Get all registers from the child. */
- if (copy_to_user(datap, task_pt_regs(child),
- sizeof(struct pt_regs)) == 0) {
- ret = 0;
- }
+ ret = copy_regset_to_user(child, &tile_user_regset_view,
+ REGSET_GPR, 0,
+ sizeof(struct pt_regs), datap);
break;
case PTRACE_SETREGS: /* Set all registers in the child. */
- if (copy_from_user(&copyregs, datap,
- sizeof(struct pt_regs)) == 0) {
- copyregs.ex1 =
- PL_ICS_EX1(USER_PL, EX1_ICS(copyregs.ex1));
- *task_pt_regs(child) = copyregs;
- ret = 0;
- }
+ ret = copy_regset_from_user(child, &tile_user_regset_view,
+ REGSET_GPR, 0,
+ sizeof(struct pt_regs), datap);
break;
case PTRACE_GETFPREGS: /* Get the child FPU state. */
@@ -128,12 +210,16 @@ long arch_ptrace(struct task_struct *child, long request,
case PTRACE_SETOPTIONS:
/* Support TILE-specific ptrace options. */
- child->ptrace &= ~PT_TRACE_MASK_TILE;
+ BUILD_BUG_ON(PTRACE_O_MASK_TILE & PTRACE_O_MASK);
tmp = data & PTRACE_O_MASK_TILE;
data &= ~PTRACE_O_MASK_TILE;
ret = ptrace_request(child, request, addr, data);
- if (tmp & PTRACE_O_TRACEMIGRATE)
- child->ptrace |= PT_TRACE_MIGRATE;
+ if (ret == 0) {
+ unsigned int flags = child->ptrace;
+ flags &= ~(PTRACE_O_MASK_TILE << PT_OPT_FLAG_SHIFT);
+ flags |= (tmp << PT_OPT_FLAG_SHIFT);
+ child->ptrace = flags;
+ }
break;
default:
diff --git a/arch/tile/mm/hugetlbpage.c b/arch/tile/mm/hugetlbpage.c
index 812e2d037972..650ccff8378c 100644
--- a/arch/tile/mm/hugetlbpage.c
+++ b/arch/tile/mm/hugetlbpage.c
@@ -231,42 +231,15 @@ static unsigned long hugetlb_get_unmapped_area_bottomup(struct file *file,
unsigned long pgoff, unsigned long flags)
{
struct hstate *h = hstate_file(file);
- struct mm_struct *mm = current->mm;
- struct vm_area_struct *vma;
- unsigned long start_addr;
-
- if (len > mm->cached_hole_size) {
- start_addr = mm->free_area_cache;
- } else {
- start_addr = TASK_UNMAPPED_BASE;
- mm->cached_hole_size = 0;
- }
-
-full_search:
- addr = ALIGN(start_addr, huge_page_size(h));
-
- for (vma = find_vma(mm, addr); ; vma = vma->vm_next) {
- /* At this point: (!vma || addr < vma->vm_end). */
- if (TASK_SIZE - len < addr) {
- /*
- * Start a new search - just in case we missed
- * some holes.
- */
- if (start_addr != TASK_UNMAPPED_BASE) {
- start_addr = TASK_UNMAPPED_BASE;
- mm->cached_hole_size = 0;
- goto full_search;
- }
- return -ENOMEM;
- }
- if (!vma || addr + len <= vma->vm_start) {
- mm->free_area_cache = addr + len;
- return addr;
- }
- if (addr + mm->cached_hole_size < vma->vm_start)
- mm->cached_hole_size = vma->vm_start - addr;
- addr = ALIGN(vma->vm_end, huge_page_size(h));
- }
+ struct vm_unmapped_area_info info;
+
+ info.flags = 0;
+ info.length = len;
+ info.low_limit = TASK_UNMAPPED_BASE;
+ info.high_limit = TASK_SIZE;
+ info.align_mask = PAGE_MASK & ~huge_page_mask(h);
+ info.align_offset = 0;
+ return vm_unmapped_area(&info);
}
static unsigned long hugetlb_get_unmapped_area_topdown(struct file *file,
@@ -274,92 +247,30 @@ static unsigned long hugetlb_get_unmapped_area_topdown(struct file *file,
unsigned long pgoff, unsigned long flags)
{
struct hstate *h = hstate_file(file);
- struct mm_struct *mm = current->mm;
- struct vm_area_struct *vma, *prev_vma;
- unsigned long base = mm->mmap_base, addr = addr0;
- unsigned long largest_hole = mm->cached_hole_size;
- int first_time = 1;
-
- /* don't allow allocations above current base */
- if (mm->free_area_cache > base)
- mm->free_area_cache = base;
-
- if (len <= largest_hole) {
- largest_hole = 0;
- mm->free_area_cache = base;
- }
-try_again:
- /* make sure it can fit in the remaining address space */
- if (mm->free_area_cache < len)
- goto fail;
-
- /* either no address requested or can't fit in requested address hole */
- addr = (mm->free_area_cache - len) & huge_page_mask(h);
- do {
- /*
- * Lookup failure means no vma is above this address,
- * i.e. return with success:
- */
- vma = find_vma_prev(mm, addr, &prev_vma);
- if (!vma) {
- return addr;
- break;
- }
-
- /*
- * new region fits between prev_vma->vm_end and
- * vma->vm_start, use it:
- */
- if (addr + len <= vma->vm_start &&
- (!prev_vma || (addr >= prev_vma->vm_end))) {
- /* remember the address as a hint for next time */
- mm->cached_hole_size = largest_hole;
- mm->free_area_cache = addr;
- return addr;
- } else {
- /* pull free_area_cache down to the first hole */
- if (mm->free_area_cache == vma->vm_end) {
- mm->free_area_cache = vma->vm_start;
- mm->cached_hole_size = largest_hole;
- }
- }
+ struct vm_unmapped_area_info info;
+ unsigned long addr;
- /* remember the largest hole we saw so far */
- if (addr + largest_hole < vma->vm_start)
- largest_hole = vma->vm_start - addr;
+ info.flags = VM_UNMAPPED_AREA_TOPDOWN;
+ info.length = len;
+ info.low_limit = PAGE_SIZE;
+ info.high_limit = current->mm->mmap_base;
+ info.align_mask = PAGE_MASK & ~huge_page_mask(h);
+ info.align_offset = 0;
+ addr = vm_unmapped_area(&info);
- /* try just below the current vma->vm_start */
- addr = (vma->vm_start - len) & huge_page_mask(h);
-
- } while (len <= vma->vm_start);
-
-fail:
- /*
- * if hint left us with no space for the requested
- * mapping then try again:
- */
- if (first_time) {
- mm->free_area_cache = base;
- largest_hole = 0;
- first_time = 0;
- goto try_again;
- }
/*
* A failed mmap() very likely causes application failure,
* so fall back to the bottom-up function here. This scenario
* can happen with large stack limits and large mmap()
* allocations.
*/
- mm->free_area_cache = TASK_UNMAPPED_BASE;
- mm->cached_hole_size = ~0UL;
- addr = hugetlb_get_unmapped_area_bottomup(file, addr0,
- len, pgoff, flags);
-
- /*
- * Restore the topdown base:
- */
- mm->free_area_cache = base;
- mm->cached_hole_size = ~0UL;
+ if (addr & ~PAGE_MASK) {
+ VM_BUG_ON(addr != -ENOMEM);
+ info.flags = 0;
+ info.low_limit = TASK_UNMAPPED_BASE;
+ info.high_limit = TASK_SIZE;
+ addr = vm_unmapped_area(&info);
+ }
return addr;
}
generated by cgit v1.2.3 (git 2.0.4) at 2024-09-17 06:32:34 +0000