From: Paolo Bonzini <pbonzini@redhat.com>
To: Sean Christopherson <seanjc@google.com>
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>,
Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 00/11] KVM: VMX: Clean up Hyper-V PV TLB flush
Date: Wed, 27 Jan 2021 19:10:42 +0100 [thread overview]
Message-ID: <7ed340f1-f6f7-4682-65be-6bc02f25d612@redhat.com> (raw)
In-Reply-To: <20201027212346.23409-1-sean.j.christopherson@intel.com>
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
next prev parent reply other threads:[~2021-01-27 18:12 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-27 21:23 [PATCH v3 00/11] KVM: VMX: Clean up Hyper-V PV TLB flush Sean Christopherson
2020-10-27 21:23 ` [PATCH v3 01/11] KVM: x86: Get active PCID only when writing a CR3 value Sean Christopherson
2020-11-12 10:11 ` Vitaly Kuznetsov
2021-01-27 17:30 ` Paolo Bonzini
2020-10-27 21:23 ` [PATCH v3 02/11] KVM: VMX: Track common EPTP for Hyper-V's paravirt TLB flush Sean Christopherson
2020-11-12 10:27 ` Vitaly Kuznetsov
2020-10-27 21:23 ` [PATCH v3 03/11] KVM: VMX: Stash kvm_vmx in a local variable for Hyper-V " Sean Christopherson
2020-10-27 21:23 ` [PATCH v3 04/11] KVM: VMX: Fold Hyper-V EPTP checking into it's only caller Sean Christopherson
2020-11-12 10:41 ` Vitaly Kuznetsov
2020-10-27 21:23 ` [PATCH v3 05/11] KVM: VMX: Do Hyper-V TLB flush iff vCPU's EPTP hasn't been flushed Sean Christopherson
2020-11-12 10:47 ` Vitaly Kuznetsov
2020-10-27 21:23 ` [PATCH v3 06/11] KVM: VMX: Invalidate hv_tlb_eptp to denote an EPTP mismatch Sean Christopherson
2020-11-12 10:50 ` Vitaly Kuznetsov
2020-10-27 21:23 ` [PATCH v3 07/11] KVM: VMX: Don't invalidate hv_tlb_eptp if the new EPTP matches Sean Christopherson
2020-10-27 21:23 ` [PATCH v3 08/11] KVM: VMX: Explicitly check for hv_remote_flush_tlb when loading pgd Sean Christopherson
2020-10-27 21:23 ` [PATCH v3 09/11] KVM: VMX: Define Hyper-V paravirt TLB flush fields iff Hyper-V is enabled Sean Christopherson
2020-11-12 10:52 ` Vitaly Kuznetsov
2020-10-27 21:23 ` [PATCH v3 10/11] KVM: VMX: Skip additional Hyper-V TLB EPTP flushes if one fails Sean Christopherson
2020-11-12 10:59 ` Vitaly Kuznetsov
2020-10-27 21:23 ` [PATCH v3 11/11] KVM: VMX: Track root HPA instead of EPTP for paravirt Hyper-V TLB flush Sean Christopherson
2020-11-12 11:02 ` Vitaly Kuznetsov
2021-01-27 18:10 ` Paolo Bonzini [this message]
2021-03-02 18:56 ` [PATCH v3 00/11] KVM: VMX: Clean up Hyper-V PV " Sean Christopherson
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