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(-) -- 2.28.0
