diff options
| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2008-06-25 00:19:12 -0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-08 13:11:01 +0200 |
| commit | eba0045ff87bab465d3c80c289f3bf709c1800f5 (patch) | |
| tree | e015805494c1ddb427fa568619163913270963bd /include | |
| parent | 67350a5c4514c280665cdb45439d32a008a264ba (diff) | |
x86/paravirt: add a pgd_alloc/free hooks
Add hooks which are called at pgd_alloc/free time. The pgd_alloc hook
may return an error code, which if non-zero, causes the pgd allocation
to be failed. The hooks may be used to allocate/free auxillary
per-pgd information.
also fix:
> * Ingo Molnar <mingo@elte.hu> wrote:
>
> include/asm/pgalloc.h: In function ‘paravirt_pgd_free':
> include/asm/pgalloc.h:14: error: parameter name omitted
> arch/x86/kernel/entry_64.S: In file included from
> arch/x86/kernel/traps_64.c:51:include/asm/pgalloc.h: In function ‘paravirt_pgd_free':
> include/asm/pgalloc.h:14: error: parameter name omitted
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: xen-devel <xen-devel@lists.xensource.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-x86/paravirt.h | 19 | ||||
| -rw-r--r-- | include/asm-x86/pgalloc.h | 4 |
2 files changed, 22 insertions, 1 deletions
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h index 41f5447efd8..5467e2cff4b 100644 --- a/include/asm-x86/paravirt.h +++ b/include/asm-x86/paravirt.h @@ -219,7 +219,14 @@ struct pv_mmu_ops { void (*flush_tlb_others)(const cpumask_t *cpus, struct mm_struct *mm, unsigned long va); - /* Hooks for allocating/releasing pagetable pages */ + /* Hooks for allocating and freeing a pagetable top-level */ + int (*pgd_alloc)(struct mm_struct *mm); + void (*pgd_free)(struct mm_struct *mm, pgd_t *pgd); + + /* + * Hooks for allocating/releasing pagetable pages when they're + * attached to a pagetable + */ 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); @@ -925,6 +932,16 @@ static inline void flush_tlb_others(cpumask_t cpumask, struct mm_struct *mm, PVOP_VCALL3(pv_mmu_ops.flush_tlb_others, &cpumask, mm, va); } +static inline int paravirt_pgd_alloc(struct mm_struct *mm) +{ + return PVOP_CALL1(int, pv_mmu_ops.pgd_alloc, mm); +} + +static inline void paravirt_pgd_free(struct mm_struct *mm, pgd_t *pgd) +{ + PVOP_VCALL2(pv_mmu_ops.pgd_free, mm, pgd); +} + static inline void paravirt_alloc_pte(struct mm_struct *mm, unsigned pfn) { PVOP_VCALL2(pv_mmu_ops.alloc_pte, mm, pfn); diff --git a/include/asm-x86/pgalloc.h b/include/asm-x86/pgalloc.h index 91e4641f3f3..d63ea431cb3 100644 --- a/include/asm-x86/pgalloc.h +++ b/include/asm-x86/pgalloc.h @@ -5,9 +5,13 @@ #include <linux/mm.h> /* for struct page */ #include <linux/pagemap.h> +static inline int __paravirt_pgd_alloc(struct mm_struct *mm) { return 0; } + #ifdef CONFIG_PARAVIRT #include <asm/paravirt.h> #else +#define paravirt_pgd_alloc(mm) __paravirt_pgd_alloc(mm) +static inline void paravirt_pgd_free(struct mm_struct *mm, pgd_t *pgd) {} static inline void paravirt_alloc_pte(struct mm_struct *mm, unsigned long pfn) {} static inline void paravirt_alloc_pmd(struct mm_struct *mm, unsigned long pfn) {} static inline void paravirt_alloc_pmd_clone(unsigned long pfn, unsigned long clonepfn, |