shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-07 19:30:30 +09:00
Code Issues Packages Projects Releases Wiki Activity

KVM: nSVM: fix condition for filtering async PF

Browse Source 
commit a3535be731 upstream.

Async page faults have to be trapped in the host (L1 in this case),
since the APF reason was passed from L0 to L1 and stored in the L1 APF
data page.  This was completely reversed: the page faults were passed
to the guest, a L2 hypervisor.

Cc: stable@vger.kernel.org
Reviewed-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Paolo Bonzini
2020-05-16 09:19:06 -04:00
committed by Greg Kroah-Hartman
parent 64b8f33b2e
commit 3c0bee0c07
1 changed files with 2 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
arch/x86/kvm/svm.c
View File

@@ -3237,8 +3237,8 @@ static int nested_svm_exit_special(struct vcpu_svm *svm)
return NESTED_EXIT_HOST;
break;
case SVM_EXIT_EXCP_BASE + PF_VECTOR:
/* When we're shadowing, trap PFs, but not async PF */
if (!npt_enabled && svm->vcpu.arch.apf.host_apf_reason == 0)
/* Trap async PF even if not shadowing */
if (!npt_enabled || svm->vcpu.arch.apf.host_apf_reason)
return NESTED_EXIT_HOST;
break;
default: