diff options
| author | Xiao Guangrong <guangrong.xiao@linux.intel.com> | 2016-02-24 17:51:08 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2016-03-03 14:36:20 +0100 |
| commit | aeecee2ea6e2b020de8bb562f4e79ab34eda3e22 (patch) | |
| tree | c2d9500e1a957ca0f28213ab1357af248cd9239b /arch | |
| parent | 547ffaed871af7db8713972eaf630802cac47cb1 (diff) | |
| download | linux-aeecee2ea6e2b020de8bb562f4e79ab34eda3e22.tar.bz2 | |
KVM: MMU: introduce kvm_mmu_slot_gfn_write_protect
Split rmap_write_protect() and introduce the function to abstract the write
protection based on the slot
This function will be used in the later patch
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kvm/mmu.c | 16 | ||||
| -rw-r--r-- | arch/x86/kvm/mmu.h | 2 |
2 files changed, 13 insertions, 5 deletions
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 566639dd13b3..7184218acf78 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -1336,23 +1336,29 @@ void kvm_arch_mmu_enable_log_dirty_pt_masked(struct kvm *kvm, kvm_mmu_write_protect_pt_masked(kvm, slot, gfn_offset, mask); } -static bool rmap_write_protect(struct kvm_vcpu *vcpu, u64 gfn) +bool kvm_mmu_slot_gfn_write_protect(struct kvm *kvm, + struct kvm_memory_slot *slot, u64 gfn) { - struct kvm_memory_slot *slot; struct kvm_rmap_head *rmap_head; int i; bool write_protected = false; - slot = kvm_vcpu_gfn_to_memslot(vcpu, gfn); - for (i = PT_PAGE_TABLE_LEVEL; i <= PT_MAX_HUGEPAGE_LEVEL; ++i) { rmap_head = __gfn_to_rmap(gfn, i, slot); - write_protected |= __rmap_write_protect(vcpu->kvm, rmap_head, true); + write_protected |= __rmap_write_protect(kvm, rmap_head, true); } return write_protected; } +static bool rmap_write_protect(struct kvm_vcpu *vcpu, u64 gfn) +{ + struct kvm_memory_slot *slot; + + slot = kvm_vcpu_gfn_to_memslot(vcpu, gfn); + return kvm_mmu_slot_gfn_write_protect(vcpu->kvm, slot, gfn); +} + static bool kvm_zap_rmapp(struct kvm *kvm, struct kvm_rmap_head *rmap_head) { u64 *sptep; diff --git a/arch/x86/kvm/mmu.h b/arch/x86/kvm/mmu.h index de92bed207f1..58fe98a0a526 100644 --- a/arch/x86/kvm/mmu.h +++ b/arch/x86/kvm/mmu.h @@ -177,4 +177,6 @@ void kvm_zap_gfn_range(struct kvm *kvm, gfn_t gfn_start, gfn_t gfn_end); void kvm_mmu_gfn_disallow_lpage(struct kvm_memory_slot *slot, gfn_t gfn); void kvm_mmu_gfn_allow_lpage(struct kvm_memory_slot *slot, gfn_t gfn); +bool kvm_mmu_slot_gfn_write_protect(struct kvm *kvm, + struct kvm_memory_slot *slot, u64 gfn); #endif |