On 02/10/20 19:28, Naresh Kamboju wrote: >> >> commit 608e2791d7353e7d777bf32038ca3e7d548155a4 (HEAD -> kvm-master) >> Author: Paolo Bonzini <pbonzini@xxxxxxxxxx> >> Date: Tue Sep 29 08:31:32 2020 -0400 >> >> KVM: VMX: update PFEC_MASK/PFEC_MATCH together with PF intercept >> >> The PFEC_MASK and PFEC_MATCH fields in the VMCS reverse the meaning of >> the #PF intercept bit in the exception bitmap when they do not match. >> This means that, if PFEC_MASK and/or PFEC_MATCH are set, the >> hypervisor can get a vmexit for #PF exceptions even when the >> corresponding bit is clear in the exception bitmap. >> >> This is unexpected and is promptly reported as a WARN_ON_ONCE. >> To fix it, reset PFEC_MASK and PFEC_MATCH when the #PF intercept >> is disabled (as is common with enable_ept && !allow_smaller_maxphyaddr). > I have tested this patch on an x86_64 machine and the reported issue is gone. > Thanks, the issue with my disk is gone too so it'll get to Linus in time for rc8. Paolo
