From: Jim Mattson <jmattson@google.com>
To: Eduardo Habkost <ehabkost@redhat.com>
Cc: "Paolo Bonzini" <pbonzini@redhat.com>,
"Radim Krčmář" <rkrcmar@redhat.com>,
"kvm list" <kvm@vger.kernel.org>,
"the arch/x86 maintainers" <x86@kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
"KarimAllah Ahmed" <karahmed@amazon.de>,
"David Woodhouse" <dwmw2@infradead.org>
Subject: Re: [PATCH] kvm: x86: Report STIBP on GET_SUPPORTED_CPUID
Date: Wed, 5 Dec 2018 11:36:54 -0800 [thread overview]
Message-ID: <CALMp9eRZtRb-tUSwomtPg7BCrY4dzny9HMVr+SvanAw3hdN7Dg@mail.gmail.com> (raw)
In-Reply-To: <20181205191956.31480-1-ehabkost@redhat.com>
On Wed, Dec 5, 2018 at 11:19 AM Eduardo Habkost <ehabkost@redhat.com> wrote:
>
> Months ago, we have added code to allow direct access to MSR_IA32_SPEC_CTRL
> to the guest, which makes STIBP available to guests. This was implemented
> by commits d28b387fb74d ("KVM/VMX: Allow direct access to
> MSR_IA32_SPEC_CTRL") and b2ac58f90540 ("KVM/SVM: Allow direct access to
> MSR_IA32_SPEC_CTRL").
>
> However, we never updated GET_SUPPORTED_CPUID to let userspace know that
> STIBP can be enabled in CPUID. Fix that by updating
> kvm_cpuid_8000_0008_ebx_x86_features and kvm_cpuid_7_0_edx_x86_features.
>
> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: Jim Mattson <jmattson@google.com>
next prev parent reply other threads:[~2018-12-05 19:37 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-05 19:19 [PATCH] kvm: x86: Report STIBP on GET_SUPPORTED_CPUID Eduardo Habkost
2018-12-05 19:36 ` Jim Mattson [this message]
2018-12-05 22:02 ` Konrad Rzeszutek Wilk
2018-12-05 22:47 ` Jim Mattson
2018-12-07 16:48 ` Eduardo Habkost
2018-12-14 10:55 ` Paolo Bonzini
2022-05-17 0:35 ` Jim Mattson
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