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| author | Avi Kivity <avi@qumranet.com> | 2008-08-27 16:32:24 +0300 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2008-10-15 10:15:24 +0200 |
| commit | 2245a28fe2e6fdb1bdabc4dcde1ea3a5c37e2a9e (patch) | |
| tree | 7e43c47167c447b343c279e8562fe08c58b4b759 /arch/x86/kvm | |
| parent | bc2d429979451d69d0985c5dbdf908cace2831cc (diff) | |
| download | blackbird-op-linux-2245a28fe2e6fdb1bdabc4dcde1ea3a5c37e2a9e.tar.gz blackbird-op-linux-2245a28fe2e6fdb1bdabc4dcde1ea3a5c37e2a9e.zip | |
KVM: MMU: Add locking around kvm_mmu_slot_remove_write_access()
It was generally safe due to slots_lock being held for write, but it wasn't
very nice.
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'arch/x86/kvm')
| -rw-r--r-- | arch/x86/kvm/mmu.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index a24da8f2ee91..5052acdc0a77 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -2097,6 +2097,7 @@ void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot) { struct kvm_mmu_page *sp; + spin_lock(&kvm->mmu_lock); list_for_each_entry(sp, &kvm->arch.active_mmu_pages, link) { int i; u64 *pt; @@ -2110,6 +2111,7 @@ void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot) if (pt[i] & PT_WRITABLE_MASK) pt[i] &= ~PT_WRITABLE_MASK; } + spin_unlock(&kvm->mmu_lock); } void kvm_mmu_zap_all(struct kvm *kvm) |
