Messages in this thread | | | Subject | Re: [PATCH v3 00/11] KVM: VMX: Clean up Hyper-V PV TLB flush | From | Paolo Bonzini <> | Date | Wed, 27 Jan 2021 19:10:42 +0100 |
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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
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