diff options
Diffstat (limited to 'arch/x86/mm')
| -rw-r--r-- | arch/x86/mm/Makefile | 6 | ||||
| -rw-r--r-- | arch/x86/mm/fault.c | 51 | ||||
| -rw-r--r-- | arch/x86/mm/highmem_32.c | 2 | ||||
| -rw-r--r-- | arch/x86/mm/ioremap.c | 72 | ||||
| -rw-r--r-- | arch/x86/mm/kmemcheck/kmemcheck.c | 14 | ||||
| -rw-r--r-- | arch/x86/mm/pat.c | 2 | ||||
| -rw-r--r-- | arch/x86/mm/physaddr.c | 70 | ||||
| -rw-r--r-- | arch/x86/mm/physaddr.h | 10 | ||||
| -rw-r--r-- | arch/x86/mm/srat_32.c | 4 |
9 files changed, 125 insertions, 106 deletions
diff --git a/arch/x86/mm/Makefile b/arch/x86/mm/Makefile index eefdeee8a87..9b5a9f59a47 100644 --- a/arch/x86/mm/Makefile +++ b/arch/x86/mm/Makefile @@ -1,5 +1,9 @@ obj-y := init.o init_$(BITS).o fault.o ioremap.o extable.o pageattr.o mmap.o \ - pat.o pgtable.o gup.o + pat.o pgtable.o physaddr.o gup.o + +# Make sure __phys_addr has no stackprotector +nostackp := $(call cc-option, -fno-stack-protector) +CFLAGS_physaddr.o := $(nostackp) obj-$(CONFIG_SMP) += tlb.o diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c index bfae139182f..775a020990a 100644 --- a/arch/x86/mm/fault.c +++ b/arch/x86/mm/fault.c @@ -285,26 +285,25 @@ check_v8086_mode(struct pt_regs *regs, unsigned long address, tsk->thread.screen_bitmap |= 1 << bit; } -static void dump_pagetable(unsigned long address) +static bool low_pfn(unsigned long pfn) { - __typeof__(pte_val(__pte(0))) page; + return pfn < max_low_pfn; +} - page = read_cr3(); - page = ((__typeof__(page) *) __va(page))[address >> PGDIR_SHIFT]; +static void dump_pagetable(unsigned long address) +{ + pgd_t *base = __va(read_cr3()); + pgd_t *pgd = &base[pgd_index(address)]; + pmd_t *pmd; + pte_t *pte; #ifdef CONFIG_X86_PAE - printk("*pdpt = %016Lx ", page); - if ((page >> PAGE_SHIFT) < max_low_pfn - && page & _PAGE_PRESENT) { - page &= PAGE_MASK; - page = ((__typeof__(page) *) __va(page))[(address >> PMD_SHIFT) - & (PTRS_PER_PMD - 1)]; - printk(KERN_CONT "*pde = %016Lx ", page); - page &= ~_PAGE_NX; - } -#else - printk("*pde = %08lx ", page); + printk("*pdpt = %016Lx ", pgd_val(*pgd)); + if (!low_pfn(pgd_val(*pgd) >> PAGE_SHIFT) || !pgd_present(*pgd)) + goto out; #endif + pmd = pmd_offset(pud_offset(pgd, address), address); + printk(KERN_CONT "*pde = %0*Lx ", sizeof(*pmd) * 2, (u64)pmd_val(*pmd)); /* * We must not directly access the pte in the highpte @@ -312,16 +311,12 @@ static void dump_pagetable(unsigned long address) * And let's rather not kmap-atomic the pte, just in case * it's allocated already: */ - if ((page >> PAGE_SHIFT) < max_low_pfn - && (page & _PAGE_PRESENT) - && !(page & _PAGE_PSE)) { - - page &= PAGE_MASK; - page = ((__typeof__(page) *) __va(page))[(address >> PAGE_SHIFT) - & (PTRS_PER_PTE - 1)]; - printk("*pte = %0*Lx ", sizeof(page)*2, (u64)page); - } + if (!low_pfn(pmd_pfn(*pmd)) || !pmd_present(*pmd) || pmd_large(*pmd)) + goto out; + pte = pte_offset_kernel(pmd, address); + printk("*pte = %0*Lx ", sizeof(*pte) * 2, (u64)pte_val(*pte)); +out: printk("\n"); } @@ -450,16 +445,12 @@ static int bad_address(void *p) static void dump_pagetable(unsigned long address) { - pgd_t *pgd; + pgd_t *base = __va(read_cr3() & PHYSICAL_PAGE_MASK); + pgd_t *pgd = base + pgd_index(address); pud_t *pud; pmd_t *pmd; pte_t *pte; - pgd = (pgd_t *)read_cr3(); - - pgd = __va((unsigned long)pgd & PHYSICAL_PAGE_MASK); - - pgd += pgd_index(address); if (bad_address(pgd)) goto bad; diff --git a/arch/x86/mm/highmem_32.c b/arch/x86/mm/highmem_32.c index 572f47c1c73..63a6ba66cbe 100644 --- a/arch/x86/mm/highmem_32.c +++ b/arch/x86/mm/highmem_32.c @@ -24,7 +24,7 @@ void kunmap(struct page *page) * no global lock is needed and because the kmap code must perform a global TLB * invalidation when the kmap pool wraps. * - * However when holding an atomic kmap is is not legal to sleep, so atomic + * However when holding an atomic kmap it is not legal to sleep, so atomic * kmaps are appropriate for short, tight code paths only. */ void *kmap_atomic_prot(struct page *page, enum km_type type, pgprot_t prot) diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c index 8a450930834..04e1ad60c63 100644 --- a/arch/x86/mm/ioremap.c +++ b/arch/x86/mm/ioremap.c @@ -22,77 +22,7 @@ #include <asm/pgalloc.h> #include <asm/pat.h> -static inline int phys_addr_valid(resource_size_t addr) -{ -#ifdef CONFIG_PHYS_ADDR_T_64BIT - return !(addr >> boot_cpu_data.x86_phys_bits); -#else - return 1; -#endif -} - -#ifdef CONFIG_X86_64 - -unsigned long __phys_addr(unsigned long x) -{ - if (x >= __START_KERNEL_map) { - x -= __START_KERNEL_map; - VIRTUAL_BUG_ON(x >= KERNEL_IMAGE_SIZE); - x += phys_base; - } else { - VIRTUAL_BUG_ON(x < PAGE_OFFSET); - x -= PAGE_OFFSET; - VIRTUAL_BUG_ON(!phys_addr_valid(x)); - } - return x; -} -EXPORT_SYMBOL(__phys_addr); - -bool __virt_addr_valid(unsigned long x) -{ - if (x >= __START_KERNEL_map) { - x -= __START_KERNEL_map; - if (x >= KERNEL_IMAGE_SIZE) - return false; - x += phys_base; - } else { - if (x < PAGE_OFFSET) - return false; - x -= PAGE_OFFSET; - if (!phys_addr_valid(x)) - return false; - } - - return pfn_valid(x >> PAGE_SHIFT); -} -EXPORT_SYMBOL(__virt_addr_valid); - -#else - -#ifdef CONFIG_DEBUG_VIRTUAL -unsigned long __phys_addr(unsigned long x) -{ - /* VMALLOC_* aren't constants */ - VIRTUAL_BUG_ON(x < PAGE_OFFSET); - VIRTUAL_BUG_ON(__vmalloc_start_set && is_vmalloc_addr((void *) x)); - return x - PAGE_OFFSET; -} -EXPORT_SYMBOL(__phys_addr); -#endif - -bool __virt_addr_valid(unsigned long x) -{ - if (x < PAGE_OFFSET) - return false; - if (__vmalloc_start_set && is_vmalloc_addr((void *) x)) - return false; - if (x >= FIXADDR_START) - return false; - return pfn_valid((x - PAGE_OFFSET) >> PAGE_SHIFT); -} -EXPORT_SYMBOL(__virt_addr_valid); - -#endif +#include "physaddr.h" int page_is_ram(unsigned long pagenr) { diff --git a/arch/x86/mm/kmemcheck/kmemcheck.c b/arch/x86/mm/kmemcheck/kmemcheck.c index 2c55ed09865..528bf954eb7 100644 --- a/arch/x86/mm/kmemcheck/kmemcheck.c +++ b/arch/x86/mm/kmemcheck/kmemcheck.c @@ -331,6 +331,20 @@ static void kmemcheck_read_strict(struct pt_regs *regs, kmemcheck_shadow_set(shadow, size); } +bool kmemcheck_is_obj_initialized(unsigned long addr, size_t size) +{ + enum kmemcheck_shadow status; + void *shadow; + + shadow = kmemcheck_shadow_lookup(addr); + if (!shadow) + return true; + + status = kmemcheck_shadow_test(shadow, size); + + return status == KMEMCHECK_SHADOW_INITIALIZED; +} + /* Access may cross page boundary */ static void kmemcheck_read(struct pt_regs *regs, unsigned long addr, unsigned int size) diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c index 352aa9e927e..b2f7d3e59b8 100644 --- a/arch/x86/mm/pat.c +++ b/arch/x86/mm/pat.c @@ -827,7 +827,7 @@ static int memtype_seq_show(struct seq_file *seq, void *v) return 0; } -static struct seq_operations memtype_seq_ops = { +static const struct seq_operations memtype_seq_ops = { .start = memtype_seq_start, .next = memtype_seq_next, .stop = memtype_seq_stop, diff --git a/arch/x86/mm/physaddr.c b/arch/x86/mm/physaddr.c new file mode 100644 index 00000000000..d2e2735327b --- /dev/null +++ b/arch/x86/mm/physaddr.c @@ -0,0 +1,70 @@ +#include <linux/mmdebug.h> +#include <linux/module.h> +#include <linux/mm.h> + +#include <asm/page.h> + +#include "physaddr.h" + +#ifdef CONFIG_X86_64 + +unsigned long __phys_addr(unsigned long x) +{ + if (x >= __START_KERNEL_map) { + x -= __START_KERNEL_map; + VIRTUAL_BUG_ON(x >= KERNEL_IMAGE_SIZE); + x += phys_base; + } else { + VIRTUAL_BUG_ON(x < PAGE_OFFSET); + x -= PAGE_OFFSET; + VIRTUAL_BUG_ON(!phys_addr_valid(x)); + } + return x; +} +EXPORT_SYMBOL(__phys_addr); + +bool __virt_addr_valid(unsigned long x) +{ + if (x >= __START_KERNEL_map) { + x -= __START_KERNEL_map; + if (x >= KERNEL_IMAGE_SIZE) + return false; + x += phys_base; + } else { + if (x < PAGE_OFFSET) + return false; + x -= PAGE_OFFSET; + if (!phys_addr_valid(x)) + return false; + } + + return pfn_valid(x >> PAGE_SHIFT); +} +EXPORT_SYMBOL(__virt_addr_valid); + +#else + +#ifdef CONFIG_DEBUG_VIRTUAL +unsigned long __phys_addr(unsigned long x) +{ + /* VMALLOC_* aren't constants */ + VIRTUAL_BUG_ON(x < PAGE_OFFSET); + VIRTUAL_BUG_ON(__vmalloc_start_set && is_vmalloc_addr((void *) x)); + return x - PAGE_OFFSET; +} +EXPORT_SYMBOL(__phys_addr); +#endif + +bool __virt_addr_valid(unsigned long x) +{ + if (x < PAGE_OFFSET) + return false; + if (__vmalloc_start_set && is_vmalloc_addr((void *) x)) + return false; + if (x >= FIXADDR_START) + return false; + return pfn_valid((x - PAGE_OFFSET) >> PAGE_SHIFT); +} +EXPORT_SYMBOL(__virt_addr_valid); + +#endif /* CONFIG_X86_64 */ diff --git a/arch/x86/mm/physaddr.h b/arch/x86/mm/physaddr.h new file mode 100644 index 00000000000..a3cd5a0c97b --- /dev/null +++ b/arch/x86/mm/physaddr.h @@ -0,0 +1,10 @@ +#include <asm/processor.h> + +static inline int phys_addr_valid(resource_size_t addr) +{ +#ifdef CONFIG_PHYS_ADDR_T_64BIT + return !(addr >> boot_cpu_data.x86_phys_bits); +#else + return 1; +#endif +} diff --git a/arch/x86/mm/srat_32.c b/arch/x86/mm/srat_32.c index 29a0e37114f..6f8aa33031c 100644 --- a/arch/x86/mm/srat_32.c +++ b/arch/x86/mm/srat_32.c @@ -215,7 +215,7 @@ int __init get_memcfg_from_srat(void) goto out_fail; if (num_memory_chunks == 0) { - printk(KERN_WARNING + printk(KERN_DEBUG "could not find any ACPI SRAT memory areas.\n"); goto out_fail; } @@ -277,7 +277,7 @@ int __init get_memcfg_from_srat(void) } return 1; out_fail: - printk(KERN_ERR "failed to get NUMA memory information from SRAT" + printk(KERN_DEBUG "failed to get NUMA memory information from SRAT" " table\n"); return 0; } |