From: Borislav Petkov <bp@alien8.de>
To: "Liang, Kan" <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
x86@kernel.org, linux-kernel@vger.kernel.org, tglx@linutronix.de,
mingo@redhat.com, ak@linux.intel.com, eranian@google.com
Subject: Re: [PATCH V6 2/5] perf/x86/kvm: Avoid unnecessary work in guest filtering
Date: Mon, 4 Feb 2019 17:41:21 +0100 [thread overview]
Message-ID: <20190204164121.GG29639@zn.tnic> (raw)
In-Reply-To: <f67d228e-c65d-479c-30ec-ee532833d8f9@linux.intel.com>
On Mon, Feb 04, 2019 at 11:23:13AM -0500, Liang, Kan wrote:
> I mean that the microcode version number is irrelevant between stepping.
> Let's use SKL server as an example.
> + INTEL_CPU_DESC(INTEL_FAM6_SKYLAKE_X, 3, 0x00000021),
> + INTEL_CPU_DESC(INTEL_FAM6_SKYLAKE_X, 4, 0x00000000),
>
> We need the function to check the min microcode version number for each
> stepping.
So you need to say "ignore stepping". I.e., X86_STEPPING_ANY.
--
Regards/Gruss,
Boris.
Good mailing practices for 400: avoid top-posting and trim the reply.
next prev parent reply other threads:[~2019-02-04 16:41 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-21 21:42 [PATCH V6 1/5] x86/cpufeature: Add facility to check for min microcode revisions kan.liang
2019-01-21 21:42 ` [PATCH V6 2/5] perf/x86/kvm: Avoid unnecessary work in guest filtering kan.liang
2019-02-04 15:06 ` Peter Zijlstra
2019-02-04 15:17 ` Peter Zijlstra
2019-02-04 15:39 ` Liang, Kan
2019-02-04 15:38 ` Peter Zijlstra
2019-02-04 15:43 ` Liang, Kan
2019-02-04 16:15 ` Peter Zijlstra
2019-02-04 16:18 ` Liang, Kan
2019-02-04 15:44 ` Peter Zijlstra
2019-02-04 15:57 ` Liang, Kan
2019-02-04 16:04 ` Borislav Petkov
2019-02-04 16:23 ` Liang, Kan
2019-02-04 16:41 ` Borislav Petkov [this message]
2019-02-04 16:13 ` Andi Kleen
2019-02-04 16:23 ` Peter Zijlstra
2019-02-04 16:55 ` Liang, Kan
2019-02-04 18:15 ` Borislav Petkov
2019-02-04 18:57 ` Liang, Kan
2019-02-04 19:43 ` Borislav Petkov
2019-02-04 20:37 ` Liang, Kan
2019-02-04 16:10 ` Peter Zijlstra
2019-02-04 16:16 ` Liang, Kan
2019-01-21 21:42 ` [PATCH V6 3/5] perf/x86/intel: Clean up SNB pebs quirk kan.liang
2019-01-21 21:42 ` [PATCH V6 4/5] perf/x86/intel: Clean up counter freezing quirk kan.liang
2019-01-21 21:42 ` [PATCH V6 5/5] perf/x86/intel: Add counter freezing quirk for Goldmont kan.liang
2019-02-04 14:27 ` [PATCH V6 1/5] x86/cpufeature: Add facility to check for min microcode revisions Liang, Kan
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