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| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2008-06-16 04:30:01 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-06-25 15:16:00 +0200 |
| commit | 08b882c627aeeeb3cfd3c4354f0d360d7949549d (patch) | |
| tree | bf4a25b0bf67c8e5886425ccd9eddc436602fa21 /include/asm-x86/paravirt.h | |
| parent | 1ea0704e0da65b2b46f9142ff1391163aac24060 (diff) | |
| download | op-kernel-dev-08b882c627aeeeb3cfd3c4354f0d360d7949549d.zip op-kernel-dev-08b882c627aeeeb3cfd3c4354f0d360d7949549d.tar.gz | |
paravirt: add hooks for ptep_modify_prot_start/commit
This patch adds paravirt-ops hooks in pv_mmu_ops for ptep_modify_prot_start and
ptep_modify_prot_commit. This allows the hypervisor-specific backends to
implement these in some more efficient way.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Acked-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/asm-x86/paravirt.h')
| -rw-r--r-- | include/asm-x86/paravirt.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h index 5ea37a4..e9ada31 100644 --- a/include/asm-x86/paravirt.h +++ b/include/asm-x86/paravirt.h @@ -238,6 +238,11 @@ struct pv_mmu_ops { void (*pte_update_defer)(struct mm_struct *mm, unsigned long addr, pte_t *ptep); + pte_t (*ptep_modify_prot_start)(struct mm_struct *mm, unsigned long addr, + pte_t *ptep); + void (*ptep_modify_prot_commit)(struct mm_struct *mm, unsigned long addr, + pte_t *ptep, pte_t pte); + pteval_t (*pte_val)(pte_t); pteval_t (*pte_flags)(pte_t); pte_t (*make_pte)(pteval_t pte); @@ -1039,6 +1044,29 @@ static inline pgdval_t pgd_val(pgd_t pgd) return ret; } +#define __HAVE_ARCH_PTEP_MODIFY_PROT_TRANSACTION +static inline pte_t ptep_modify_prot_start(struct mm_struct *mm, unsigned long addr, + pte_t *ptep) +{ + pteval_t ret; + + ret = PVOP_CALL3(pteval_t, pv_mmu_ops.ptep_modify_prot_start, + mm, addr, ptep); + + return (pte_t) { .pte = ret }; +} + +static inline void ptep_modify_prot_commit(struct mm_struct *mm, unsigned long addr, + pte_t *ptep, pte_t pte) +{ + if (sizeof(pteval_t) > sizeof(long)) + /* 5 arg words */ + pv_mmu_ops.ptep_modify_prot_commit(mm, addr, ptep, pte); + else + PVOP_VCALL4(pv_mmu_ops.ptep_modify_prot_commit, + mm, addr, ptep, pte.pte); +} + static inline void set_pte(pte_t *ptep, pte_t pte) { if (sizeof(pteval_t) > sizeof(long)) |
