On 24/09/20 00:04, Sean Christopherson wrote: > Cleanups for page fault handling that were encountered during early TDX > enabling, but are worthwhile on their own. Specifically, patch 4 fixes an > issue where KVM doesn't detect a spurious page fault (due to the fault > being fixed by a different pCPU+vCPU) and does the full gamut of writing > the SPTE, updating stats, and prefetching SPTEs. > > Sean Christopherson (4): > KVM: x86/mmu: Return -EIO if page fault returns RET_PF_INVALID > KVM: x86/mmu: Invert RET_PF_* check when falling through to emulation > KVM: x86/mmu: Return unique RET_PF_* values if the fault was fixed > KVM: x86/mmu: Bail early from final #PF handling on spurious faults > > arch/x86/kvm/mmu/mmu.c | 70 +++++++++++++++++++++------------- > arch/x86/kvm/mmu/mmutrace.h | 13 +++---- > arch/x86/kvm/mmu/paging_tmpl.h | 3 ++ > 3 files changed, 52 insertions(+), 34 deletions(-) > Queued, thanks. Looking at the KVM_BUG_ON now since patch 1 is somewhat related. Paolo
