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. Paolo
