From: Paolo Bonzini <pbonzini@redhat.com>
To: Jim Mattson <jmattson@google.com>
Cc: Babu Moger <babu.moger@amd.com>,
tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
x86@kernel.org, hpa@zytor.com, seanjc@google.com,
vkuznets@redhat.com, wanpengli@tencent.com, joro@8bytes.org,
tony.luck@intel.com, peterz@infradead.org,
kyung.min.park@intel.com, wei.huang2@amd.com, jgross@suse.com,
andrew.cooper3@citrix.com, linux-kernel@vger.kernel.org,
kvm@vger.kernel.org
Subject: Re: [PATCH] KVM: x86: Expose Predictive Store Forwarding Disable
Date: Fri, 26 Aug 2022 12:10:44 +0200 [thread overview]
Message-ID: <b28c0e56-59b3-1152-56ef-490887cb0d87@redhat.com> (raw)
In-Reply-To: <CALMp9eQCcy-MjB8Su+654XyL3zfR876tdh4QHUjvB7EiNjCU9A@mail.gmail.com>
On 8/24/22 19:16, Jim Mattson wrote:
>> Borislav asked to not show psfd in /proc/cpuinfo, because Linux had
>> decided not to control PSF separately; instead it just piggybacked
>> on SSBD which should disable PSF as well. Honestly I disagree but
>> it's not my area of maintenance.
>
> Do we expose PSFD in KVM for the use of another popular guest OS?
Yes, that was the purpose of this patch and we expose it via
MSR_IA32_SPEC_CTRL (the only validation that KVM does is in
kvm_spec_ctrl_test_value(), so it does not need to know more about the
specific bits).
Paolo
prev parent reply other threads:[~2022-08-26 10:10 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <163244601049.30292.5855870305350227855.stgit@bmoger-ubuntu>
2021-09-27 10:59 ` [PATCH] KVM: x86: Expose Predictive Store Forwarding Disable Borislav Petkov
2021-09-27 11:13 ` Paolo Bonzini
2021-09-27 12:06 ` Borislav Petkov
2021-09-27 12:14 ` Paolo Bonzini
2021-09-27 12:28 ` Borislav Petkov
2021-09-27 12:54 ` Paolo Bonzini
2021-09-27 13:38 ` Borislav Petkov
2021-09-27 15:47 ` Babu Moger
2021-09-27 15:48 ` Borislav Petkov
2021-09-28 16:04 ` Paolo Bonzini
2021-09-29 20:27 ` Babu Moger
2021-09-30 13:41 ` Paolo Bonzini
2021-09-30 14:12 ` Babu Moger
2022-08-23 21:26 ` Jim Mattson
2022-08-24 17:13 ` Paolo Bonzini
2022-08-24 17:16 ` Jim Mattson
2022-08-26 10:10 ` Paolo Bonzini [this message]
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