From c8e5393ab38564d2f45b560a2f95bc8f9ff6f823 Mon Sep 17 00:00:00 2001 From: Jeremy Fitzhardinge Date: Wed, 30 Jan 2008 13:32:57 +0100 Subject: [PATCH] x86: page.h: make pte_t a union to always include Make sure pte_t, whatever its definition, has a pte element with type pteval_t. This allows common code to access it without needing to be specifically parameterised on what pagetable mode we're compiling for. For 32-bit, this means that pte_t becomes a union with "pte" and "{ pte_low, pte_high }" (PAE) or just "pte_low" (non-PAE). Signed-off-by: Jeremy Fitzhardinge Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- arch/x86/xen/mmu.c | 4 +--- include/asm-x86/page.h | 10 ++++++++++ include/asm-x86/page_32.h | 30 +++++++----------------------- include/asm-x86/page_64.h | 3 --- include/asm-x86/paravirt.h | 2 +- include/asm-x86/pgtable-2level.h | 4 ++-- include/asm-x86/pgtable-3level.h | 4 ++-- include/asm-x86/pgtable_64.h | 6 +++--- include/asm-x86/processor.h | 1 - include/xen/page.h | 6 +++--- 10 files changed, 29 insertions(+), 41 deletions(-) diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c index 0ac6c5dc49ba..52f392893008 100644 --- a/arch/x86/xen/mmu.c +++ b/arch/x86/xen/mmu.c @@ -244,9 +244,7 @@ pte_t xen_make_pte(unsigned long long pte) if (pte & 1) pte = phys_to_machine(XPADDR(pte)).maddr; - pte &= ~_PAGE_PCD; - - return (pte_t){ pte, pte >> 32 }; + return (pte_t){ .pte = pte }; } pmd_t xen_make_pmd(unsigned long long pmd) diff --git a/include/asm-x86/page.h b/include/asm-x86/page.h index 91920565a575..a6495eb5c605 100644 --- a/include/asm-x86/page.h +++ b/include/asm-x86/page.h @@ -108,6 +108,16 @@ static inline pmdval_t native_pmd_val(pmd_t pmd) #include #endif /* PAGETABLE_LEVELS >= 3 */ +static inline pte_t native_make_pte(pteval_t val) +{ + return (pte_t) { .pte = val }; +} + +static inline pteval_t native_pte_val(pte_t pte) +{ + return pte.pte; +} + #define pgprot_val(x) ((x).pgprot) #define __pgprot(x) ((pgprot_t) { (x) } ) diff --git a/include/asm-x86/page_32.h b/include/asm-x86/page_32.h index e424bef4395a..11c4b39cada1 100644 --- a/include/asm-x86/page_32.h +++ b/include/asm-x86/page_32.h @@ -26,18 +26,12 @@ typedef u64 pgdval_t; typedef u64 pgprotval_t; typedef u64 phys_addr_t; -typedef struct { unsigned long pte_low, pte_high; } pte_t; - -static inline unsigned long long native_pte_val(pte_t pte) -{ - return pte.pte_low | ((unsigned long long)pte.pte_high << 32); -} - -static inline pte_t native_make_pte(unsigned long long val) -{ - return (pte_t) { .pte_low = val, .pte_high = (val >> 32) } ; -} - +typedef union { + struct { + unsigned long pte_low, pte_high; + }; + pteval_t pte; +} pte_t; #endif /* __ASSEMBLY__ */ #else /* !CONFIG_X86_PAE */ @@ -53,19 +47,9 @@ typedef unsigned long pgdval_t; typedef unsigned long pgprotval_t; typedef unsigned long phys_addr_t; -typedef struct { pteval_t pte_low; } pte_t; +typedef union { pteval_t pte, pte_low; } pte_t; typedef pte_t boot_pte_t; -static inline unsigned long native_pte_val(pte_t pte) -{ - return pte.pte_low; -} - -static inline pte_t native_make_pte(unsigned long val) -{ - return (pte_t) { .pte_low = val }; -} - #endif /* __ASSEMBLY__ */ #endif /* CONFIG_X86_PAE */ diff --git a/include/asm-x86/page_64.h b/include/asm-x86/page_64.h index ebf977a809a8..c1ac42d8707f 100644 --- a/include/asm-x86/page_64.h +++ b/include/asm-x86/page_64.h @@ -70,9 +70,6 @@ typedef unsigned long phys_addr_t; typedef struct { pteval_t pte; } pte_t; -#define native_pte_val(x) ((x).pte) -#define native_make_pte(x) ((pte_t) { (x) } ) - #define vmemmap ((struct page *)VMEMMAP_START) #endif /* !__ASSEMBLY__ */ diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h index b35ed95166e4..24385decbd47 100644 --- a/include/asm-x86/paravirt.h +++ b/include/asm-x86/paravirt.h @@ -922,7 +922,7 @@ static inline pte_t __pte(unsigned long long val) unsigned long long ret = PVOP_CALL2(unsigned long long, pv_mmu_ops.make_pte, val, val >> 32); - return (pte_t) { ret, ret >> 32 }; + return (pte_t) { .pte = ret }; } static inline pmd_t __pmd(unsigned long long val) diff --git a/include/asm-x86/pgtable-2level.h b/include/asm-x86/pgtable-2level.h index d3171c0cb157..f949bb083089 100644 --- a/include/asm-x86/pgtable-2level.h +++ b/include/asm-x86/pgtable-2level.h @@ -72,13 +72,13 @@ static inline int pte_exec_kernel(pte_t pte) ((((pte).pte_low >> 1) & 0x1f ) + (((pte).pte_low >> 8) << 5 )) #define pgoff_to_pte(off) \ - ((pte_t) { (((off) & 0x1f) << 1) + (((off) >> 5) << 8) + _PAGE_FILE }) + ((pte_t) { .pte_low = (((off) & 0x1f) << 1) + (((off) >> 5) << 8) + _PAGE_FILE }) /* Encode and de-code a swap entry */ #define __swp_type(x) (((x).val >> 1) & 0x1f) #define __swp_offset(x) ((x).val >> 8) #define __swp_entry(type, offset) ((swp_entry_t) { ((type) << 1) | ((offset) << 8) }) #define __pte_to_swp_entry(pte) ((swp_entry_t) { (pte).pte_low }) -#define __swp_entry_to_pte(x) ((pte_t) { (x).val }) +#define __swp_entry_to_pte(x) ((pte_t) { .pte = (x).val }) #endif /* _I386_PGTABLE_2LEVEL_H */ diff --git a/include/asm-x86/pgtable-3level.h b/include/asm-x86/pgtable-3level.h index 61a7d0029f60..3da96f792dd0 100644 --- a/include/asm-x86/pgtable-3level.h +++ b/include/asm-x86/pgtable-3level.h @@ -163,7 +163,7 @@ static inline unsigned long pte_pfn(pte_t pte) * put the 32 bits of offset into the high part. */ #define pte_to_pgoff(pte) ((pte).pte_high) -#define pgoff_to_pte(off) ((pte_t) { _PAGE_FILE, (off) }) +#define pgoff_to_pte(off) ((pte_t) { { .pte_low = _PAGE_FILE, .pte_high = (off) } }) #define PTE_FILE_MAX_BITS 32 /* Encode and de-code a swap entry */ @@ -171,7 +171,7 @@ static inline unsigned long pte_pfn(pte_t pte) #define __swp_offset(x) ((x).val >> 5) #define __swp_entry(type, offset) ((swp_entry_t){(type) | (offset) << 5}) #define __pte_to_swp_entry(pte) ((swp_entry_t){ (pte).pte_high }) -#define __swp_entry_to_pte(x) ((pte_t){ 0, (x).val }) +#define __swp_entry_to_pte(x) ((pte_t){ { .pte_high = (x).val } }) #define __pmd_free_tlb(tlb, x) do { } while (0) diff --git a/include/asm-x86/pgtable_64.h b/include/asm-x86/pgtable_64.h index 57e4ebe0f7fc..77038d8e9bfd 100644 --- a/include/asm-x86/pgtable_64.h +++ b/include/asm-x86/pgtable_64.h @@ -72,7 +72,7 @@ extern unsigned long empty_zero_page[PAGE_SIZE/sizeof(unsigned long)]; static inline void set_pte(pte_t *dst, pte_t val) { - pte_val(*dst) = pte_val(val); + *dst = val; } #define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval) @@ -222,7 +222,7 @@ static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, #define pmd_pfn(x) ((pmd_val(x) & __PHYSICAL_MASK) >> PAGE_SHIFT) #define pte_to_pgoff(pte) ((pte_val(pte) & PHYSICAL_PAGE_MASK) >> PAGE_SHIFT) -#define pgoff_to_pte(off) ((pte_t) { ((off) << PAGE_SHIFT) | _PAGE_FILE }) +#define pgoff_to_pte(off) ((pte_t) { .pte = ((off) << PAGE_SHIFT) | _PAGE_FILE }) #define PTE_FILE_MAX_BITS __PHYSICAL_MASK_SHIFT /* PTE - Level 1 access. */ @@ -264,7 +264,7 @@ static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, #define __swp_offset(x) ((x).val >> 8) #define __swp_entry(type, offset) ((swp_entry_t) { ((type) << 1) | ((offset) << 8) }) #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) -#define __swp_entry_to_pte(x) ((pte_t) { (x).val }) +#define __swp_entry_to_pte(x) ((pte_t) { .pte = (x).val }) extern spinlock_t pgd_lock; extern struct list_head pgd_list; diff --git a/include/asm-x86/processor.h b/include/asm-x86/processor.h index cc549bf819a4..e701ac5487e5 100644 --- a/include/asm-x86/processor.h +++ b/include/asm-x86/processor.h @@ -14,7 +14,6 @@ struct mm_struct; #include #include #include -#include #include #include #include diff --git a/include/xen/page.h b/include/xen/page.h index c0c8fcb27899..031ef22a971e 100644 --- a/include/xen/page.h +++ b/include/xen/page.h @@ -156,16 +156,16 @@ static inline pte_t mfn_pte(unsigned long page_nr, pgprot_t pgprot) static inline unsigned long long pte_val_ma(pte_t x) { - return ((unsigned long long)x.pte_high << 32) | x.pte_low; + return x.pte; } #define pmd_val_ma(v) ((v).pmd) #define pud_val_ma(v) ((v).pgd.pgd) -#define __pte_ma(x) ((pte_t) { .pte_low = (x), .pte_high = (x)>>32 } ) +#define __pte_ma(x) ((pte_t) { .pte = (x) }) #define __pmd_ma(x) ((pmd_t) { (x) } ) #else /* !X86_PAE */ #define pte_mfn(_pte) ((_pte).pte_low >> PAGE_SHIFT) #define mfn_pte(pfn, prot) __pte_ma(((pfn) << PAGE_SHIFT) | pgprot_val(prot)) -#define pte_val_ma(x) ((x).pte_low) +#define pte_val_ma(x) ((x).pte) #define pmd_val_ma(v) ((v).pud.pgd.pgd) #define __pte_ma(x) ((pte_t) { (x) } ) #endif /* CONFIG_X86_PAE */