linux-kernel - Re: [PATCH 3/5] KVM: x86: implement MSR_IA32_TSX

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Message-ID: <CALMp9eQb5i99ML_gkbgebXP7CNmvmu4hOdmzfrti-5cpJwknVw@mail.gmail.com>
Date:   Tue, 19 Nov 2019 12:02:44 -0800
From:   Jim Mattson <jmattson@...gle.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kvm list <kvm@...r.kernel.org>,
        Sean Christopherson <sean.j.christopherson@...el.com>
Subject: Re: [PATCH 3/5] KVM: x86: implement MSR_IA32_TSX_CTRL effect on CPUID

On Mon, Nov 18, 2019 at 10:17 AM Paolo Bonzini <pbonzini@...hat.com> wrote:
>
> Because KVM always emulates CPUID, the CPUID clear bit
> (bit 1) of MSR_IA32_TSX_CTRL must be emulated "manually"
> by the hypervisor when performing said emulation.
>
> Right now neither kvm-intel.ko nor kvm-amd.ko implement
> MSR_IA32_TSX_CTRL but this will change in the next patch.
>
> Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
Reviewed-by: Jim Mattson <jmattson@...gle.com>