From: Paolo Bonzini Date: Sat, 16 May 2020 13:19:06 +0000 (-0400) Subject: KVM: nSVM: fix condition for filtering async PF X-Git-Tag: v5.15~3726^2~56 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a3535be731c2a343912578465021f50937f7b099;p=platform%2Fkernel%2Flinux-starfive.git 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: Sean Christopherson Signed-off-by: Paolo Bonzini --- diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c index a89a166..f4cd2d0 100644 --- a/arch/x86/kvm/svm/nested.c +++ b/arch/x86/kvm/svm/nested.c @@ -880,8 +880,8 @@ 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: