Commit a3535be7 authored by Paolo Bonzini's avatar Paolo Bonzini

KVM: nSVM: fix condition for filtering async PF

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: default avatarSean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 88197e6a
...@@ -880,8 +880,8 @@ int nested_svm_exit_special(struct vcpu_svm *svm) ...@@ -880,8 +880,8 @@ int nested_svm_exit_special(struct vcpu_svm *svm)
return NESTED_EXIT_HOST; return NESTED_EXIT_HOST;
break; break;
case SVM_EXIT_EXCP_BASE + PF_VECTOR: case SVM_EXIT_EXCP_BASE + PF_VECTOR:
/* When we're shadowing, trap PFs, but not async PF */ /* Trap async PF even if not shadowing */
if (!npt_enabled && svm->vcpu.arch.apf.host_apf_reason == 0) if (!npt_enabled || svm->vcpu.arch.apf.host_apf_reason)
return NESTED_EXIT_HOST; return NESTED_EXIT_HOST;
break; break;
default: default:
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment