diff options
| -rw-r--r-- | arch/x86/kernel/paravirt.c | 3 | ||||
| -rw-r--r-- | arch/x86/xen/enlighten.c | 3 | ||||
| -rw-r--r-- | include/asm-x86/paravirt.h | 28 |
3 files changed, 34 insertions, 0 deletions
diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c index c98d5468818..f1ab0f72700 100644 --- a/arch/x86/kernel/paravirt.c +++ b/arch/x86/kernel/paravirt.c @@ -380,6 +380,9 @@ struct pv_mmu_ops pv_mmu_ops = { .pte_update = paravirt_nop, .pte_update_defer = paravirt_nop, + .ptep_modify_prot_start = __ptep_modify_prot_start, + .ptep_modify_prot_commit = __ptep_modify_prot_commit, + #ifdef CONFIG_HIGHPTE .kmap_atomic_pte = kmap_atomic, #endif diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c index 73fb0c4c150..0b7553cbc52 100644 --- a/arch/x86/xen/enlighten.c +++ b/arch/x86/xen/enlighten.c @@ -1138,6 +1138,9 @@ static const struct pv_mmu_ops xen_mmu_ops __initdata = { .set_pte_at = xen_set_pte_at, .set_pmd = xen_set_pmd_hyper, + .ptep_modify_prot_start = __ptep_modify_prot_start, + .ptep_modify_prot_commit = __ptep_modify_prot_commit, + .pte_val = xen_pte_val, .pte_flags = native_pte_val, .pgd_val = xen_pgd_val, diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h index 5ea37a48eec..e9ada314dfc 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)) |