diff options
| author | Avi Kivity <avi@qumranet.com> | 2009-08-06 14:39:46 -0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-09-08 20:17:04 -0700 |
| commit | c832f513b1ebe93e0a2c71a98f319da4ce560f7f (patch) | |
| tree | 7812d6cc3fde7fa6e3619a1fd21adaf8d66c69d6 | |
| parent | 2b52d454ea2217f9422aee3847aa4678e93fa9e0 (diff) | |
KVM: MMU: Add locking around kvm_mmu_slot_remove_write_access()
(cherry picked from commit 2245a28fe2e6fdb1bdabc4dcde1ea3a5c37e2a9e)
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -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 3da2508eb22a..32aa0b814842 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -2055,6 +2055,7 @@ 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; @@ -2068,6 +2069,7 @@ 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) |