Merge master.kernel.org:/pub/scm/linux/kernel/git/herbert/crypto-2.6

[powerpc.git] / include / asm-i386 / pgtable.h

diff --git a/include/asm-i386/pgtable.h b/include/asm-i386/pgtable.h
index e6a4723..edce9d5 100644 (file)
--- 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)
@@ -265,6 +267,16 @@ static inline pte_t pte_mkhuge(pte_t pte)  { (pte).pte_low |= _PAGE_PSE; return p
 #define pte_update_defer(mm, addr, ptep)       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
@@ -282,12 +294,25 @@ 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
@@ -304,12 +329,9 @@ 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;                                                        \
 })
 
@@ -317,19 +339,16 @@ 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;
 }
@@ -339,8 +358,11 @@ 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);
        }
@@ -470,9 +492,9 @@ extern pte_t *lookup_address(unsigned long address);
 
 #if defined(CONFIG_HIGHPTE)
 #define pte_offset_map(dir, address) \
-       ((pte_t *)kmap_atomic(pmd_page(*(dir)),KM_PTE0) + pte_index(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(pmd_page(*(dir)),KM_PTE1) + pte_index(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
@@ -495,6 +517,22 @@ 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
@@ -504,10 +542,6 @@ do {                                                                       \
 #define io_remap_pfn_range(vma, vaddr, pfn, size, prot)                \
                remap_pfn_range(vma, vaddr, pfn, size, prot)
 
-#define MK_IOSPACE_PFN(space, pfn)     (pfn)
-#define GET_IOSPACE(pfn)               0
-#define GET_PFN(pfn)                   (pfn)
-
 #include <asm-generic/pgtable.h>
 
 #endif /* _I386_PGTABLE_H */