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| author | Stephen Rothwell <sfr@canb.auug.org.au> | 2011-07-25 13:59:46 -0400 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2011-07-25 14:53:52 -0400 |
| commit | 5f00bcb38ef9a980a33c6dbdc0044964b05f22dd (patch) | |
| tree | 3175fb9375aecb50bde1be0bf4fa8aa8155131d6 /arch/x86/kvm/mmu.h | |
| parent | 34006cee28f7344f9557a4be3816c7891b1bbab1 (diff) | |
| parent | b6844e8f64920cdee620157252169ba63afb0c89 (diff) | |
| download | talos-op-linux-5f00bcb38ef9a980a33c6dbdc0044964b05f22dd.tar.gz talos-op-linux-5f00bcb38ef9a980a33c6dbdc0044964b05f22dd.zip | |
Merge branch 'master' into devel and apply fixup from Stephen Rothwell:
vfs/nfs: fixup for nfs_open_context change
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'arch/x86/kvm/mmu.h')
| -rw-r--r-- | arch/x86/kvm/mmu.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/x86/kvm/mmu.h b/arch/x86/kvm/mmu.h index 7086ca85d3e7..e374db9af021 100644 --- a/arch/x86/kvm/mmu.h +++ b/arch/x86/kvm/mmu.h @@ -49,6 +49,8 @@ #define PFERR_FETCH_MASK (1U << 4) int kvm_mmu_get_spte_hierarchy(struct kvm_vcpu *vcpu, u64 addr, u64 sptes[4]); +void kvm_mmu_set_mmio_spte_mask(u64 mmio_mask); +int handle_mmio_page_fault_common(struct kvm_vcpu *vcpu, u64 addr, bool direct); int kvm_init_shadow_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *context); static inline unsigned int kvm_mmu_available_pages(struct kvm *kvm) @@ -76,4 +78,27 @@ static inline int is_present_gpte(unsigned long pte) return pte & PT_PRESENT_MASK; } +static inline int is_writable_pte(unsigned long pte) +{ + return pte & PT_WRITABLE_MASK; +} + +static inline bool is_write_protection(struct kvm_vcpu *vcpu) +{ + return kvm_read_cr0_bits(vcpu, X86_CR0_WP); +} + +static inline bool check_write_user_access(struct kvm_vcpu *vcpu, + bool write_fault, bool user_fault, + unsigned long pte) +{ + if (unlikely(write_fault && !is_writable_pte(pte) + && (user_fault || is_write_protection(vcpu)))) + return false; + + if (unlikely(user_fault && !(pte & PT_USER_MASK))) + return false; + + return true; +} #endif |
