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From: Jim Mattson <jmattson@google.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
	kvm list <kvm@vger.kernel.org>,
	Sean Christopherson <sean.j.christopherson@intel.com>,
	stable@vger.kernel.org
Subject: Re: [PATCH 1/5] KVM: x86: fix presentation of TSX feature in ARCH_CAPABILITIES
Date: Mon, 18 Nov 2019 12:48:48 -0800	[thread overview]
Message-ID: <CALMp9eQRZv75kBiqAaugqhSLxSoiAb-1bBz3YTk-EyWb4gfBDw@mail.gmail.com> (raw)
In-Reply-To: <1574101067-5638-2-git-send-email-pbonzini@redhat.com>

On Mon, Nov 18, 2019 at 10:17 AM Paolo Bonzini <pbonzini@redhat.com> wrote:
>
> KVM does not implement MSR_IA32_TSX_CTRL, so it must not be presented
> to the guests.  It is also confusing to have !ARCH_CAP_TSX_CTRL_MSR &&
> !RTM && ARCH_CAP_TAA_NO: lack of MSR_IA32_TSX_CTRL suggests TSX was not
> hidden (it actually was), yet the value says that TSX is not vulnerable
> to microarchitectural data sampling.  Fix both.
> Cc: stable@vger.kernel.org
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Ignore my previous comment. I see that the functionality I want is
coming later in this series.

Reviewed-by: Jim Mattson <jmattson@google.com>

  parent reply	other threads:[~2019-11-18 20:49 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-18 18:17 [PATCH 0/5] KVM: vmx: implement MSR_IA32_TSX_CTRL for guests Paolo Bonzini
2019-11-18 18:17 ` [PATCH 1/5] KVM: x86: fix presentation of TSX feature in ARCH_CAPABILITIES Paolo Bonzini
2019-11-18 19:39   ` Jim Mattson
2019-11-18 20:48   ` Jim Mattson [this message]
2019-11-22 20:15   ` Sean Christopherson
2019-11-18 18:17 ` [PATCH 2/5] KVM: x86: do not modify masked bits of shared MSRs Paolo Bonzini
2019-11-19 19:00   ` Jim Mattson
2019-11-18 18:17 ` [PATCH 3/5] KVM: x86: implement MSR_IA32_TSX_CTRL effect on CPUID Paolo Bonzini
2019-11-19 20:02   ` Jim Mattson
2019-11-18 18:17 ` [PATCH 4/5] KVM: vmx: implement MSR_IA32_TSX_CTRL disable RTM functionality Paolo Bonzini
2019-11-19 21:06   ` Jim Mattson
2019-11-20 12:21     ` Paolo Bonzini
2019-12-04 23:49   ` Jim Mattson
2019-12-05 10:16     ` Paolo Bonzini
2019-11-18 18:17 ` [PATCH 5/5] KVM: vmx: use MSR_IA32_TSX_CTRL to hard-disable TSX on guest that lack it Paolo Bonzini
2019-11-21  2:22   ` Eduardo Habkost
2019-11-21  9:05     ` Paolo Bonzini

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