From 982333683385343d8d2db9a1df69c98406f42687 Mon Sep 17 00:00:00 2001 From: "Kirill A. Shutemov" Date: Tue, 14 Apr 2015 15:46:14 -0700 Subject: x86: expose number of page table levels on Kconfig level We would want to use number of page table level to define mm_struct. Let's expose it as CONFIG_PGTABLE_LEVELS. Signed-off-by: Kirill A. Shutemov Cc: Thomas Gleixner Cc: Ingo Molnar Cc: "H. Peter Anvin" Tested-by: Guenter Roeck Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index faff693..3e3aaad 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -277,6 +277,12 @@ config ARCH_SUPPORTS_UPROBES config FIX_EARLYCON_MEM def_bool y +config PGTABLE_LEVELS + int + default 4 if X86_64 + default 3 if X86_PAE + default 2 + source "init/Kconfig" source "kernel/Kconfig.freezer" diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h index 5f6051d..8957810 100644 --- a/arch/x86/include/asm/paravirt.h +++ b/arch/x86/include/asm/paravirt.h @@ -545,7 +545,7 @@ static inline void set_pmd(pmd_t *pmdp, pmd_t pmd) PVOP_VCALL2(pv_mmu_ops.set_pmd, pmdp, val); } -#if PAGETABLE_LEVELS >= 3 +#if CONFIG_PGTABLE_LEVELS >= 3 static inline pmd_t __pmd(pmdval_t val) { pmdval_t ret; @@ -585,7 +585,7 @@ static inline void set_pud(pud_t *pudp, pud_t pud) PVOP_VCALL2(pv_mmu_ops.set_pud, pudp, val); } -#if PAGETABLE_LEVELS == 4 +#if CONFIG_PGTABLE_LEVELS == 4 static inline pud_t __pud(pudval_t val) { pudval_t ret; @@ -636,9 +636,9 @@ static inline void pud_clear(pud_t *pudp) set_pud(pudp, __pud(0)); } -#endif /* PAGETABLE_LEVELS == 4 */ +#endif /* CONFIG_PGTABLE_LEVELS == 4 */ -#endif /* PAGETABLE_LEVELS >= 3 */ +#endif /* CONFIG_PGTABLE_LEVELS >= 3 */ #ifdef CONFIG_X86_PAE /* Special-case pte-setting operations for PAE, which can't update a diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h index 7549b8b..f7b0b5c 100644 --- a/arch/x86/include/asm/paravirt_types.h +++ b/arch/x86/include/asm/paravirt_types.h @@ -294,7 +294,7 @@ struct pv_mmu_ops { struct paravirt_callee_save pgd_val; struct paravirt_callee_save make_pgd; -#if PAGETABLE_LEVELS >= 3 +#if CONFIG_PGTABLE_LEVELS >= 3 #ifdef CONFIG_X86_PAE void (*set_pte_atomic)(pte_t *ptep, pte_t pteval); void (*pte_clear)(struct mm_struct *mm, unsigned long addr, @@ -308,13 +308,13 @@ struct pv_mmu_ops { struct paravirt_callee_save pmd_val; struct paravirt_callee_save make_pmd; -#if PAGETABLE_LEVELS == 4 +#if CONFIG_PGTABLE_LEVELS == 4 struct paravirt_callee_save pud_val; struct paravirt_callee_save make_pud; void (*set_pgd)(pgd_t *pudp, pgd_t pgdval); -#endif /* PAGETABLE_LEVELS == 4 */ -#endif /* PAGETABLE_LEVELS >= 3 */ +#endif /* CONFIG_PGTABLE_LEVELS == 4 */ +#endif /* CONFIG_PGTABLE_LEVELS >= 3 */ struct pv_lazy_ops lazy_mode; diff --git a/arch/x86/include/asm/pgalloc.h b/arch/x86/include/asm/pgalloc.h index c4412e9..bf7f8b5 100644 --- a/arch/x86/include/asm/pgalloc.h +++ b/arch/x86/include/asm/pgalloc.h @@ -77,7 +77,7 @@ static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, #define pmd_pgtable(pmd) pmd_page(pmd) -#if PAGETABLE_LEVELS > 2 +#if CONFIG_PGTABLE_LEVELS > 2 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr) { struct page *page; @@ -116,7 +116,7 @@ static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) } #endif /* CONFIG_X86_PAE */ -#if PAGETABLE_LEVELS > 3 +#if CONFIG_PGTABLE_LEVELS > 3 static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud) { paravirt_alloc_pud(mm, __pa(pud) >> PAGE_SHIFT); @@ -142,7 +142,7 @@ static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud, ___pud_free_tlb(tlb, pud); } -#endif /* PAGETABLE_LEVELS > 3 */ -#endif /* PAGETABLE_LEVELS > 2 */ +#endif /* CONFIG_PGTABLE_LEVELS > 3 */ +#endif /* CONFIG_PGTABLE_LEVELS > 2 */ #endif /* _ASM_X86_PGALLOC_H */ diff --git a/arch/x86/include/asm/pgtable-2level_types.h b/arch/x86/include/asm/pgtable-2level_types.h index daacc23..3925764 100644 --- a/arch/x86/include/asm/pgtable-2level_types.h +++ b/arch/x86/include/asm/pgtable-2level_types.h @@ -17,7 +17,6 @@ typedef union { #endif /* !__ASSEMBLY__ */ #define SHARED_KERNEL_PMD 0 -#define PAGETABLE_LEVELS 2 /* * traditional i386 two-level paging structure: diff --git a/arch/x86/include/asm/pgtable-3level_types.h b/arch/x86/include/asm/pgtable-3level_types.h index 1bd5876..bcc8962 100644 --- a/arch/x86/include/asm/pgtable-3level_types.h +++ b/arch/x86/include/asm/pgtable-3level_types.h @@ -24,8 +24,6 @@ typedef union { #define SHARED_KERNEL_PMD 1 #endif -#define PAGETABLE_LEVELS 3 - /* * PGDIR_SHIFT determines what a top-level page table entry can map */ diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h index a0c35bf..fe57e7a 100644 --- a/arch/x86/include/asm/pgtable.h +++ b/arch/x86/include/asm/pgtable.h @@ -551,7 +551,7 @@ static inline unsigned long pages_to_mb(unsigned long npg) return npg >> (20 - PAGE_SHIFT); } -#if PAGETABLE_LEVELS > 2 +#if CONFIG_PGTABLE_LEVELS > 2 static inline int pud_none(pud_t pud) { return native_pud_val(pud) == 0; @@ -594,9 +594,9 @@ static inline int pud_large(pud_t pud) { return 0; } -#endif /* PAGETABLE_LEVELS > 2 */ +#endif /* CONFIG_PGTABLE_LEVELS > 2 */ -#if PAGETABLE_LEVELS > 3 +#if CONFIG_PGTABLE_LEVELS > 3 static inline int pgd_present(pgd_t pgd) { return pgd_flags(pgd) & _PAGE_PRESENT; @@ -633,7 +633,7 @@ static inline int pgd_none(pgd_t pgd) { return !native_pgd_val(pgd); } -#endif /* PAGETABLE_LEVELS > 3 */ +#endif /* CONFIG_PGTABLE_LEVELS > 3 */ #endif /* __ASSEMBLY__ */ diff --git a/arch/x86/include/asm/pgtable_64_types.h b/arch/x86/include/asm/pgtable_64_types.h index 602b602..e6844df 100644 --- a/arch/x86/include/asm/pgtable_64_types.h +++ b/arch/x86/include/asm/pgtable_64_types.h @@ -20,7 +20,6 @@ typedef struct { pteval_t pte; } pte_t; #endif /* !__ASSEMBLY__ */ #define SHARED_KERNEL_PMD 0 -#define PAGETABLE_LEVELS 4 /* * PGDIR_SHIFT determines what a top-level page table entry can map diff --git a/arch/x86/include/asm/pgtable_types.h b/arch/x86/include/asm/pgtable_types.h index 8c7c108..78f0c8c 100644 --- a/arch/x86/include/asm/pgtable_types.h +++ b/arch/x86/include/asm/pgtable_types.h @@ -234,7 +234,7 @@ static inline pgdval_t pgd_flags(pgd_t pgd) return native_pgd_val(pgd) & PTE_FLAGS_MASK; } -#if PAGETABLE_LEVELS > 3 +#if CONFIG_PGTABLE_LEVELS > 3 typedef struct { pudval_t pud; } pud_t; static inline pud_t native_make_pud(pmdval_t val) @@ -255,7 +255,7 @@ static inline pudval_t native_pud_val(pud_t pud) } #endif -#if PAGETABLE_LEVELS > 2 +#if CONFIG_PGTABLE_LEVELS > 2 typedef struct { pmdval_t pmd; } pmd_t; static inline pmd_t native_make_pmd(pmdval_t val) diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c index 548d25f..c614dd4 100644 --- a/arch/x86/kernel/paravirt.c +++ b/arch/x86/kernel/paravirt.c @@ -443,7 +443,7 @@ struct pv_mmu_ops pv_mmu_ops = { .ptep_modify_prot_start = __ptep_modify_prot_start, .ptep_modify_prot_commit = __ptep_modify_prot_commit, -#if PAGETABLE_LEVELS >= 3 +#if CONFIG_PGTABLE_LEVELS >= 3 #ifdef CONFIG_X86_PAE .set_pte_atomic = native_set_pte_atomic, .pte_clear = native_pte_clear, @@ -454,13 +454,13 @@ struct pv_mmu_ops pv_mmu_ops = { .pmd_val = PTE_IDENT, .make_pmd = PTE_IDENT, -#if PAGETABLE_LEVELS == 4 +#if CONFIG_PGTABLE_LEVELS == 4 .pud_val = PTE_IDENT, .make_pud = PTE_IDENT, .set_pgd = native_set_pgd, #endif -#endif /* PAGETABLE_LEVELS >= 3 */ +#endif /* CONFIG_PGTABLE_LEVELS >= 3 */ .pte_val = PTE_IDENT, .pgd_val = PTE_IDENT, diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c index 5a7e525..b28edfe 100644 --- a/arch/x86/mm/pgtable.c +++ b/arch/x86/mm/pgtable.c @@ -58,7 +58,7 @@ void ___pte_free_tlb(struct mmu_gather *tlb, struct page *pte) tlb_remove_page(tlb, pte); } -#if PAGETABLE_LEVELS > 2 +#if CONFIG_PGTABLE_LEVELS > 2 void ___pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd) { struct page *page = virt_to_page(pmd); @@ -74,14 +74,14 @@ void ___pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd) tlb_remove_page(tlb, page); } -#if PAGETABLE_LEVELS > 3 +#if CONFIG_PGTABLE_LEVELS > 3 void ___pud_free_tlb(struct mmu_gather *tlb, pud_t *pud) { paravirt_release_pud(__pa(pud) >> PAGE_SHIFT); tlb_remove_page(tlb, virt_to_page(pud)); } -#endif /* PAGETABLE_LEVELS > 3 */ -#endif /* PAGETABLE_LEVELS > 2 */ +#endif /* CONFIG_PGTABLE_LEVELS > 3 */ +#endif /* CONFIG_PGTABLE_LEVELS > 2 */ static inline void pgd_list_add(pgd_t *pgd) { @@ -117,9 +117,9 @@ static void pgd_ctor(struct mm_struct *mm, pgd_t *pgd) /* If the pgd points to a shared pagetable level (either the ptes in non-PAE, or shared PMD in PAE), then just copy the references from swapper_pg_dir. */ - if (PAGETABLE_LEVELS == 2 || - (PAGETABLE_LEVELS == 3 && SHARED_KERNEL_PMD) || - PAGETABLE_LEVELS == 4) { + if (CONFIG_PGTABLE_LEVELS == 2 || + (CONFIG_PGTABLE_LEVELS == 3 && SHARED_KERNEL_PMD) || + CONFIG_PGTABLE_LEVELS == 4) { clone_pgd_range(pgd + KERNEL_PGD_BOUNDARY, swapper_pg_dir + KERNEL_PGD_BOUNDARY, KERNEL_PGD_PTRS); diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c index adca9e2..65083ad 100644 --- a/arch/x86/xen/mmu.c +++ b/arch/x86/xen/mmu.c @@ -502,7 +502,7 @@ __visible pmd_t xen_make_pmd(pmdval_t pmd) } PV_CALLEE_SAVE_REGS_THUNK(xen_make_pmd); -#if PAGETABLE_LEVELS == 4 +#if CONFIG_PGTABLE_LEVELS == 4 __visible pudval_t xen_pud_val(pud_t pud) { return pte_mfn_to_pfn(pud.pud); @@ -589,7 +589,7 @@ static void xen_set_pgd(pgd_t *ptr, pgd_t val) xen_mc_issue(PARAVIRT_LAZY_MMU); } -#endif /* PAGETABLE_LEVELS == 4 */ +#endif /* CONFIG_PGTABLE_LEVELS == 4 */ /* * (Yet another) pagetable walker. This one is intended for pinning a @@ -1628,7 +1628,7 @@ static void xen_release_pmd(unsigned long pfn) xen_release_ptpage(pfn, PT_PMD); } -#if PAGETABLE_LEVELS == 4 +#if CONFIG_PGTABLE_LEVELS == 4 static void xen_alloc_pud(struct mm_struct *mm, unsigned long pfn) { xen_alloc_ptpage(mm, pfn, PT_PUD); @@ -2046,7 +2046,7 @@ static void __init xen_post_allocator_init(void) pv_mmu_ops.set_pte = xen_set_pte; pv_mmu_ops.set_pmd = xen_set_pmd; pv_mmu_ops.set_pud = xen_set_pud; -#if PAGETABLE_LEVELS == 4 +#if CONFIG_PGTABLE_LEVELS == 4 pv_mmu_ops.set_pgd = xen_set_pgd; #endif @@ -2056,7 +2056,7 @@ static void __init xen_post_allocator_init(void) pv_mmu_ops.alloc_pmd = xen_alloc_pmd; pv_mmu_ops.release_pte = xen_release_pte; pv_mmu_ops.release_pmd = xen_release_pmd; -#if PAGETABLE_LEVELS == 4 +#if CONFIG_PGTABLE_LEVELS == 4 pv_mmu_ops.alloc_pud = xen_alloc_pud; pv_mmu_ops.release_pud = xen_release_pud; #endif @@ -2122,14 +2122,14 @@ static const struct pv_mmu_ops xen_mmu_ops __initconst = { .make_pmd = PV_CALLEE_SAVE(xen_make_pmd), .pmd_val = PV_CALLEE_SAVE(xen_pmd_val), -#if PAGETABLE_LEVELS == 4 +#if CONFIG_PGTABLE_LEVELS == 4 .pud_val = PV_CALLEE_SAVE(xen_pud_val), .make_pud = PV_CALLEE_SAVE(xen_make_pud), .set_pgd = xen_set_pgd_hyper, .alloc_pud = xen_alloc_pmd_init, .release_pud = xen_release_pmd_init, -#endif /* PAGETABLE_LEVELS == 4 */ +#endif /* CONFIG_PGTABLE_LEVELS == 4 */ .activate_mm = xen_activate_mm, .dup_mmap = xen_dup_mmap, diff --git a/include/trace/events/xen.h b/include/trace/events/xen.h index d06b6da..bce990f 100644 --- a/include/trace/events/xen.h +++ b/include/trace/events/xen.h @@ -224,7 +224,7 @@ TRACE_EVENT(xen_mmu_pmd_clear, TP_printk("pmdp %p", __entry->pmdp) ); -#if PAGETABLE_LEVELS >= 4 +#if CONFIG_PGTABLE_LEVELS >= 4 TRACE_EVENT(xen_mmu_set_pud, TP_PROTO(pud_t *pudp, pud_t pudval), -- cgit v0.10.2