linux-kernel - Re: [PATCH v4 20/38] KVM: x86/pmu: Check if mediated vPMU can intercept rdpmc

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Message-ID: <aI1OefS8b9vfHyu9@google.com>
Date: Fri, 1 Aug 2025 16:32:09 -0700
From: Sean Christopherson <seanjc@...gle.com>
To: Dapeng Mi <dapeng1.mi@...ux.intel.com>
Cc: Sandipan Das <sandipan.das@....com>, Mingwei Zhang <mizhang@...gle.com>, 
	Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, 
	Paolo Bonzini <pbonzini@...hat.com>, Mark Rutland <mark.rutland@....com>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, 
	Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>, Liang@...gle.com, 
	Kan <kan.liang@...ux.intel.com>, "H. Peter Anvin" <hpa@...or.com>, 
	linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org, 
	kvm@...r.kernel.org, linux-kselftest@...r.kernel.org, 
	Yongwei Ma <yongwei.ma@...el.com>, Xiong Zhang <xiong.y.zhang@...ux.intel.com>, 
	Jim Mattson <jmattson@...gle.com>, Zide Chen <zide.chen@...el.com>, 
	Eranian Stephane <eranian@...gle.com>, Shukla Manali <Manali.Shukla@....com>, 
	Nikunj Dadhania <nikunj.dadhania@....com>
Subject: Re: [PATCH v4 20/38] KVM: x86/pmu: Check if mediated vPMU can
 intercept rdpmc

On Wed, Jul 30, 2025, Dapeng Mi wrote:
> 
> On 7/30/2025 8:38 AM, Sean Christopherson wrote:
> > On Tue, Jul 29, 2025, Dapeng Mi wrote:
> >> BTW, Sean, may I know your plan about the mediated vPMU v5 patch set? Thanks.
> > I'll get it out this week (hopefully tomorrow).
> 
> Thumbs up! Thanks.

I lied, I'm not going to get it out until Monday.  Figuring out how to deal with
instruction emulation in the fastpath VM-Exit handlers took me longer than I was
hoping/expecting.

It's fully tested, and I have all but one changelog written, but I'm out of time
for today (I made a stupid goof (inverted a !) that cost me an ~hour today, *sigh*).

Unless I get hit by a meteor, I'll get it out Monday.

Sorry for the delay.  :-/