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Commit 2761fa09 authored by Jeremy Fitzhardinge's avatar Jeremy Fitzhardinge Committed by Ingo Molnar
Browse files

x86: add pud_alloc for 4-level pagetables 



Signed-off-by: default avatarJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 6944a9c8

arch/x86/kernel/paravirt.c

+2 −0
Original line number Diff line number Diff line
@@ -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,

arch/x86/mm/pgtable.c

+1 −0
Original line number Diff line number Diff line
@@ -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 */

include/asm-x86/paravirt.h

+11 −0
Original line number Diff line number Diff line
@@ -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)

{

include/asm-x86/pgalloc.h

+3 −0
Original line number Diff line number Diff line
@@ -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)));

}