linux-kernel - Re: [PATCH 0/5] KVM: selftests: Fix PMC checks in PMU counters test

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Message-ID: <Z6qN3wPXH4cbRzLP@google.com>
Date: Mon, 10 Feb 2025 15:38:07 -0800
From: Sean Christopherson <seanjc@...gle.com>
To: Paolo Bonzini <pbonzini@...hat.com>
Cc: kvm@...r.kernel.org, linux-kernel@...r.kernel.org, 
	kernel test robot <oliver.sang@...el.com>
Subject: Re: [PATCH 0/5] KVM: selftests: Fix PMC checks in PMU counters test

On Mon, Jan 20, 2025, Paolo Bonzini wrote:
> On Sat, Jan 18, 2025 at 12:42 AM Sean Christopherson <seanjc@...gle.com> wrote:
> >
> > Fix a flaw in the Intel PMU counters test where it asserts that an event is
> > counting correctly without actually knowing what the event counts given the
> > underlying hardware.
> >
> > The bug manifests as failures with the Top-Down Slots architectural event
> > when running CPUs that doesn't actually support that arch event (pre-ICX).
> > The arch event encoding still counts _something_, just not Top-Down Slots
> > (I haven't bothered to look up what it was counting).  The passed by sheer
> > dumb luck until an unrelated change caused the count of the unknown event
> > to drop.
> 
> Queued for 6.14-rc1, thanks.

Lies :-)

Neither this nor the main selftests pull request[*] landed in 6.14.  None of this
is urgent, so if it's easier on your end I can carry them forward and send them
for 6.15.

[*] https://lore.kernel.org/all/20250117010718.2328467-5-seanjc@google.com