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-rw-r--r--include/asm-i386/pgtable.h97
1 files changed, 61 insertions, 36 deletions
diff --git a/include/asm-i386/pgtable.h b/include/asm-i386/pgtable.h
index c3b58d473a5..e16359f81a4 100644
--- a/include/asm-i386/pgtable.h
+++ b/include/asm-i386/pgtable.h
@@ -159,6 +159,7 @@ void paging_init(void);
extern unsigned long long __PAGE_KERNEL, __PAGE_KERNEL_EXEC;
#define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW)
+#define __PAGE_KERNEL_RX (__PAGE_KERNEL_EXEC & ~_PAGE_RW)
#define __PAGE_KERNEL_NOCACHE (__PAGE_KERNEL | _PAGE_PCD)
#define __PAGE_KERNEL_LARGE (__PAGE_KERNEL | _PAGE_PSE)
#define __PAGE_KERNEL_LARGE_EXEC (__PAGE_KERNEL_EXEC | _PAGE_PSE)
@@ -166,6 +167,7 @@ extern unsigned long long __PAGE_KERNEL, __PAGE_KERNEL_EXEC;
#define PAGE_KERNEL __pgprot(__PAGE_KERNEL)
#define PAGE_KERNEL_RO __pgprot(__PAGE_KERNEL_RO)
#define PAGE_KERNEL_EXEC __pgprot(__PAGE_KERNEL_EXEC)
+#define PAGE_KERNEL_RX __pgprot(__PAGE_KERNEL_RX)
#define PAGE_KERNEL_NOCACHE __pgprot(__PAGE_KERNEL_NOCACHE)
#define PAGE_KERNEL_LARGE __pgprot(__PAGE_KERNEL_LARGE)
#define PAGE_KERNEL_LARGE_EXEC __pgprot(__PAGE_KERNEL_LARGE_EXEC)
@@ -241,6 +243,8 @@ static inline pte_t pte_mkyoung(pte_t pte) { (pte).pte_low |= _PAGE_ACCESSED; re
static inline pte_t pte_mkwrite(pte_t pte) { (pte).pte_low |= _PAGE_RW; return pte; }
static inline pte_t pte_mkhuge(pte_t pte) { (pte).pte_low |= _PAGE_PSE; return pte; }
+extern void vmalloc_sync_all(void);
+
#ifdef CONFIG_X86_PAE
# include <asm/pgtable-3level.h>
#else
@@ -263,9 +267,18 @@ static inline pte_t pte_mkhuge(pte_t pte) { (pte).pte_low |= _PAGE_PSE; return p
*/
#define pte_update(mm, addr, ptep) do { } while (0)
#define pte_update_defer(mm, addr, ptep) do { } while (0)
-#define paravirt_map_pt_hook(slot, va, pfn) do { } while (0)
#endif
+/* local pte updates need not use xchg for locking */
+static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep)
+{
+ pte_t res = *ptep;
+
+ /* Pure native function needs no input for mm, addr */
+ native_pte_clear(NULL, 0, ptep);
+ return res;
+}
+
/*
* We only update the dirty/accessed state if we set
* the dirty bit by hand in the kernel, since the hardware
@@ -283,12 +296,25 @@ do { \
} \
} while (0)
-/*
- * We don't actually have these, but we want to advertise them so that
- * we can encompass the flush here.
- */
#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY
+#define ptep_test_and_clear_dirty(vma, addr, ptep) ({ \
+ int ret = 0; \
+ if (pte_dirty(*ptep)) \
+ ret = test_and_clear_bit(_PAGE_BIT_DIRTY, &ptep->pte_low); \
+ if (ret) \
+ pte_update_defer(vma->vm_mm, addr, ptep); \
+ ret; \
+})
+
#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
+#define ptep_test_and_clear_young(vma, addr, ptep) ({ \
+ int ret = 0; \
+ if (pte_young(*ptep)) \
+ ret = test_and_clear_bit(_PAGE_BIT_ACCESSED, &ptep->pte_low); \
+ if (ret) \
+ pte_update_defer(vma->vm_mm, addr, ptep); \
+ ret; \
+})
/*
* Rules for using ptep_establish: the pte MUST be a user pte, and
@@ -305,12 +331,9 @@ do { \
#define ptep_clear_flush_dirty(vma, address, ptep) \
({ \
int __dirty; \
- __dirty = pte_dirty(*(ptep)); \
- if (__dirty) { \
- clear_bit(_PAGE_BIT_DIRTY, &(ptep)->pte_low); \
- pte_update_defer((vma)->vm_mm, (address), (ptep)); \
+ __dirty = ptep_test_and_clear_dirty((vma), (address), (ptep)); \
+ if (__dirty) \
flush_tlb_page(vma, address); \
- } \
__dirty; \
})
@@ -318,19 +341,16 @@ do { \
#define ptep_clear_flush_young(vma, address, ptep) \
({ \
int __young; \
- __young = pte_young(*(ptep)); \
- if (__young) { \
- clear_bit(_PAGE_BIT_ACCESSED, &(ptep)->pte_low); \
- pte_update_defer((vma)->vm_mm, (address), (ptep)); \
+ __young = ptep_test_and_clear_young((vma), (address), (ptep)); \
+ if (__young) \
flush_tlb_page(vma, address); \
- } \
__young; \
})
#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
{
- pte_t pte = raw_ptep_get_and_clear(ptep);
+ pte_t pte = native_ptep_get_and_clear(ptep);
pte_update(mm, addr, ptep);
return pte;
}
@@ -340,8 +360,11 @@ static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, unsigned long
{
pte_t pte;
if (full) {
- pte = *ptep;
- pte_clear(mm, addr, ptep);
+ /*
+ * Full address destruction in progress; paravirt does not
+ * care about updates and native needs no locking
+ */
+ pte = native_local_ptep_get_and_clear(ptep);
} else {
pte = ptep_get_and_clear(mm, addr, ptep);
}
@@ -470,24 +493,10 @@ extern pte_t *lookup_address(unsigned long address);
#endif
#if defined(CONFIG_HIGHPTE)
-#define pte_offset_map(dir, address) \
-({ \
- pte_t *__ptep; \
- unsigned pfn = pmd_val(*(dir)) >> PAGE_SHIFT; \
- __ptep = (pte_t *)kmap_atomic(pfn_to_page(pfn),KM_PTE0);\
- paravirt_map_pt_hook(KM_PTE0,__ptep, pfn); \
- __ptep = __ptep + pte_index(address); \
- __ptep; \
-})
-#define pte_offset_map_nested(dir, address) \
-({ \
- pte_t *__ptep; \
- unsigned pfn = pmd_val(*(dir)) >> PAGE_SHIFT; \
- __ptep = (pte_t *)kmap_atomic(pfn_to_page(pfn),KM_PTE1);\
- paravirt_map_pt_hook(KM_PTE1,__ptep, pfn); \
- __ptep = __ptep + pte_index(address); \
- __ptep; \
-})
+#define pte_offset_map(dir, address) \
+ ((pte_t *)kmap_atomic_pte(pmd_page(*(dir)),KM_PTE0) + pte_index(address))
+#define pte_offset_map_nested(dir, address) \
+ ((pte_t *)kmap_atomic_pte(pmd_page(*(dir)),KM_PTE1) + pte_index(address))
#define pte_unmap(pte) kunmap_atomic(pte, KM_PTE0)
#define pte_unmap_nested(pte) kunmap_atomic(pte, KM_PTE1)
#else
@@ -510,6 +519,22 @@ do { \
* tables contain all the necessary information.
*/
#define update_mmu_cache(vma,address,pte) do { } while (0)
+
+void native_pagetable_setup_start(pgd_t *base);
+void native_pagetable_setup_done(pgd_t *base);
+
+#ifndef CONFIG_PARAVIRT
+static inline void paravirt_pagetable_setup_start(pgd_t *base)
+{
+ native_pagetable_setup_start(base);
+}
+
+static inline void paravirt_pagetable_setup_done(pgd_t *base)
+{
+ native_pagetable_setup_done(base);
+}
+#endif /* !CONFIG_PARAVIRT */
+
#endif /* !__ASSEMBLY__ */
#ifdef CONFIG_FLATMEM
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-01 12:40:04 +0000