From: Sean Christopherson <seanjc@google.com>
To: Jim Mattson <jmattson@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
"maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)"
<x86@kernel.org>, "H. Peter Anvin" <hpa@zytor.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
Josh Poimboeuf <jpoimboe@kernel.org>,
Pawan Gupta <pawan.kumar.gupta@linux.intel.com>,
"Chang S. Bae" <chang.seok.bae@intel.com>,
Babu Moger <babu.moger@amd.com>, Wyes Karny <wyes.karny@amd.com>,
"open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)"
<linux-kernel@vger.kernel.org>,
"open list:KERNEL VIRTUAL MACHINE FOR X86 (KVM/x86)"
<kvm@vger.kernel.org>
Subject: Re: [PATCH v3 2/2] KVM: x86: Expose CPUID.(EAX=7,ECX=1).EAX[12:10] to the guest
Date: Fri, 7 Oct 2022 01:45:48 +0000 [thread overview]
Message-ID: <Yz+EzB0Y0tRl7rAz@google.com> (raw)
In-Reply-To: <20220901211811.2883855-2-jmattson@google.com>
The shortlog is trying to win some kind of award.
And technically, KVM_GET_SUPPORTED_CPUID advertises features to userspace, not
to the guest. How about this?
KVM: x86: Advertise fast REP string features inherent to the CPU
On Thu, Sep 01, 2022, Jim Mattson wrote:
> Fast zero-length REP MOVSB, fast short REP STOSB, and fast short REP
> {CMPSB,SCASB} are inherent features of the processor that cannot be
> hidden by the hypervisor. When these features are present on the host,
> enumerate them in KVM_GET_SUPPORTED_CPUID.
>
> Signed-off-by: Jim Mattson <jmattson@google.com>
With a less cryptic shortlog,
Reviewed-by: Sean Christopherson <seanjc@google.com>
next prev parent reply other threads:[~2022-10-07 1:46 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-01 21:18 [PATCH v3 1/2] x86/cpufeatures: Add macros for Intel's new fast rep string features Jim Mattson
2022-09-01 21:18 ` [PATCH v3 2/2] KVM: x86: Expose CPUID.(EAX=7,ECX=1).EAX[12:10] to the guest Jim Mattson
2022-10-07 1:45 ` Sean Christopherson [this message]
2022-09-02 4:14 ` [PATCH v3 1/2] x86/cpufeatures: Add macros for Intel's new fast rep string features H. Peter Anvin
2022-09-02 5:48 ` Borislav Petkov
2022-10-07 1:46 ` Sean Christopherson
2023-01-19 20:48 ` Sean Christopherson
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