On Wed, Jan 27, 2021, Paolo Bonzini wrote: > On 27/10/20 22:23, Sean Christopherson wrote: > > Clean up KVM's PV TLB flushing when running with EPT on Hyper-V, i.e. as > > a nested VMM. No real goal in mind other than the sole patch in v1, which > > is a minor change to avoid a future mixup when TDX also wants to define > > .remote_flush_tlb. Everything else is opportunistic clean up. > > > > Patch 1 legitimately tested on VMX (no SVM), everything else effectively > > build tested only. > > > > v3: > > - Add a patch to pass the root_hpa instead of pgd to vmx_load_mmu_pgd() > > and retrieve the active PCID only when necessary. [Vitaly] > > - Selectively collects reviews (skipped a few due to changes). [Vitaly] > > - Explicitly invalidate hv_tlb_eptp instead of leaving it valid when > > the mismatch tracker "knows" it's invalid. [Vitaly] > > - Change the last patch to use "hv_root_ept" instead of "hv_tlb_pgd" > > to better reflect what is actually being tracked. > > > > v2: Rewrite everything. > > Sean Christopherson (11): > > KVM: x86: Get active PCID only when writing a CR3 value > > KVM: VMX: Track common EPTP for Hyper-V's paravirt TLB flush > > KVM: VMX: Stash kvm_vmx in a local variable for Hyper-V paravirt TLB > > flush > > KVM: VMX: Fold Hyper-V EPTP checking into it's only caller > > KVM: VMX: Do Hyper-V TLB flush iff vCPU's EPTP hasn't been flushed > > KVM: VMX: Invalidate hv_tlb_eptp to denote an EPTP mismatch > > KVM: VMX: Don't invalidate hv_tlb_eptp if the new EPTP matches > > KVM: VMX: Explicitly check for hv_remote_flush_tlb when loading pgd > > KVM: VMX: Define Hyper-V paravirt TLB flush fields iff Hyper-V is > > enabled > > KVM: VMX: Skip additional Hyper-V TLB EPTP flushes if one fails > > KVM: VMX: Track root HPA instead of EPTP for paravirt Hyper-V TLB > > flush > > > > arch/x86/include/asm/kvm_host.h | 4 +- > > arch/x86/kvm/mmu.h | 2 +- > > arch/x86/kvm/svm/svm.c | 4 +- > > arch/x86/kvm/vmx/vmx.c | 134 ++++++++++++++++++-------------- > > arch/x86/kvm/vmx/vmx.h | 19 ++--- > > 5 files changed, 87 insertions(+), 76 deletions(-) > > > > Queued, thanks. Looks like this got shadow-banned, I'll send v4.
