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x86: add pud_alloc for 4-level pagetables

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Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Jeremy Fitzhardinge 2008-03-17 16:37:02 -07:00 committed by Ingo Molnar
parent 6944a9c894
commit 2761fa0920
4 changed files with 17 additions and 0 deletions
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2
arch/x86/kernel/paravirt.c
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@ -369,8 +369,10 @@ struct pv_mmu_ops pv_mmu_ops = {
.alloc_pte = paravirt_nop,
.alloc_pmd = paravirt_nop,
.alloc_pmd_clone = paravirt_nop,
.alloc_pud = paravirt_nop,
.release_pte = paravirt_nop,
.release_pmd = paravirt_nop,
.release_pud = paravirt_nop,
.set_pte = native_set_pte,
.set_pte_at = native_set_pte_at,

1
arch/x86/mm/pgtable.c
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@ -38,6 +38,7 @@ void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd)
#if PAGETABLE_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 */

11
include/asm-x86/paravirt.h
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@ -223,8 +223,10 @@ struct pv_mmu_ops {
void (*alloc_pte)(struct mm_struct *mm, u32 pfn);
void (*alloc_pmd)(struct mm_struct *mm, u32 pfn);
void (*alloc_pmd_clone)(u32 pfn, u32 clonepfn, u32 start, u32 count);
void (*alloc_pud)(struct mm_struct *mm, u32 pfn);
void (*release_pte)(u32 pfn);
void (*release_pmd)(u32 pfn);
void (*release_pud)(u32 pfn);
/* Pagetable manipulation functions */
void (*set_pte)(pte_t *ptep, pte_t pteval);
@ -934,6 +936,15 @@ static inline void paravirt_release_pmd(unsigned pfn)
PVOP_VCALL1(pv_mmu_ops.release_pmd, pfn);
}
static inline void paravirt_alloc_pud(struct mm_struct *mm, unsigned pfn)
{
PVOP_VCALL2(pv_mmu_ops.alloc_pud, mm, pfn);
}
static inline void paravirt_release_pud(unsigned pfn)
{
PVOP_VCALL1(pv_mmu_ops.release_pud, pfn);
}
#ifdef CONFIG_HIGHPTE
static inline void *kmap_atomic_pte(struct page *page, enum km_type type)
{

3
include/asm-x86/pgalloc.h
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@ -11,8 +11,10 @@
#define paravirt_alloc_pte(mm, pfn) do { } while (0)
#define paravirt_alloc_pmd(mm, pfn) do { } while (0)
#define paravirt_alloc_pmd_clone(pfn, clonepfn, start, count) do { } while (0)
#define paravirt_alloc_pud(mm, pfn) do { } while (0)
#define paravirt_release_pte(pfn) do { } while (0)
#define paravirt_release_pmd(pfn) do { } while (0)
#define paravirt_release_pud(pfn) do { } while (0)
#endif
/*
@ -85,6 +87,7 @@ static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
#if PAGETABLE_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);
set_pgd(pgd, __pgd(_PAGE_TABLE | __pa(pud)));
}