diff options
| author | Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> | 2010-11-12 14:47:01 +0800 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2011-01-12 11:29:12 +0200 |
| commit | e5f3f027960128035a5fa176877b5e9160b35397 (patch) | |
| tree | 7c8ad1d7cd4d5ab21a71dfe23f0bdf9a0b98caf3 | |
| parent | 5054c0de664dbbb47f1e6b69d668b6018df832f6 (diff) | |
KVM: MMU: clear apfs if page state is changed
If CR0.PG is changed, the page fault cann't be avoid when the prefault address
is accessed later
And it also fix a bug: it can retry a page enabled #PF in page disabled context
if mmu is shadow page
This idear is from Gleb Natapov
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
| -rw-r--r-- | arch/x86/kvm/x86.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index b7ee61d5bc81..9b875ff05410 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -520,6 +520,9 @@ int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) kvm_x86_ops->set_cr0(vcpu, cr0); + if ((cr0 ^ old_cr0) & X86_CR0_PG) + kvm_clear_async_pf_completion_queue(vcpu); + if ((cr0 ^ old_cr0) & update_bits) kvm_mmu_reset_context(vcpu); return 0; |