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,
Reiji Watanabe <reijiw@google.com>
Subject: Re: [PATCH v3 0/4] KVM: x86: MSR_TSC_AUX fixes and improvements
Date: Mon, 26 Apr 2021 11:26:49 +0200 [thread overview]
Message-ID: <cfeffc2d-b529-a573-2816-c8ae487041ac@redhat.com> (raw)
In-Reply-To: <20210423223404.3860547-1-seanjc@google.com>
On 24/04/21 00:34, Sean Christopherson wrote:
> Fix potential cross-vendor landmines due to Intel and AMD having different
> behavior for MSR_TSC_AUX[63:32], unify the logic across SVM and VMX, and
> switch MSR_TSC_AUX via user return MSRs on SVM (the original goal).
>
> v3:
> - Fix a comment typo. [Reiji]
> - Add patches to add missing guest_cpuid_has() check, drop bits 63:32 on
> AMD, and unify VMX and SVM emulation.
> - Rebase to kvm/next, commit c4f71901d53b ("Merge tag 'kvmarm-5.13' ... )
>
> v2:
> - Rebase to kvm/queue (ish), commit 0e91d1992235 ("KVM: SVM: Allocate SEV
> command structures on local stack")
> - https://lkml.kernel.org/r/20210422001736.3255735-1-seanjc@google.com
>
> v1: https://lkml.kernel.org/r/20210206003224.302728-1-seanjc@google.com
>
>
> Sean Christopherson (4):
> KVM: SVM: Inject #GP on guest MSR_TSC_AUX accesses if RDTSCP
> unsupported
> KVM: SVM: Clear MSR_TSC_AUX[63:32] on write
> KVM: x86: Tie Intel and AMD behavior for MSR_TSC_AUX to guest CPU
> model
> KVM: SVM: Delay restoration of host MSR_TSC_AUX until return to
> userspace
>
> arch/x86/kvm/svm/svm.c | 58 +++++++++++++++++-------------------------
> arch/x86/kvm/svm/svm.h | 7 -----
> arch/x86/kvm/vmx/vmx.c | 13 ----------
> arch/x86/kvm/x86.c | 34 +++++++++++++++++++++++++
> 4 files changed, 58 insertions(+), 54 deletions(-)
>
Queued 1-2-4 (with fix for patch 2).
Paolo
prev parent reply other threads:[~2021-04-26 9:26 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-23 22:34 [PATCH v3 0/4] KVM: x86: MSR_TSC_AUX fixes and improvements Sean Christopherson
2021-04-23 22:34 ` [PATCH v3 1/4] KVM: SVM: Inject #GP on guest MSR_TSC_AUX accesses if RDTSCP unsupported Sean Christopherson
2021-04-26 8:49 ` Vitaly Kuznetsov
2021-04-23 22:34 ` [PATCH v3 2/4] KVM: SVM: Clear MSR_TSC_AUX[63:32] on write Sean Christopherson
2021-04-26 8:57 ` Vitaly Kuznetsov
2021-04-26 19:18 ` Sean Christopherson
2021-04-26 19:44 ` Sean Christopherson
2021-04-23 22:34 ` [PATCH v3 3/4] KVM: x86: Tie Intel and AMD behavior for MSR_TSC_AUX to guest CPU model Sean Christopherson
2021-04-24 7:19 ` Reiji Watanabe
2021-04-26 19:38 ` Sean Christopherson
2021-04-27 4:42 ` Reiji Watanabe
2021-04-27 21:58 ` Sean Christopherson
2021-04-23 22:34 ` [PATCH v3 4/4] KVM: SVM: Delay restoration of host MSR_TSC_AUX until return to userspace Sean Christopherson
2021-04-26 9:26 ` Paolo Bonzini [this message]
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