linux-kernel - Re: [PATCH 00/18] KVM: arm64: Support FEAT

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Message-Id: <173651597781.2396497.580300234024062639.b4-ty@kernel.org>
Date: Fri, 10 Jan 2025 16:22:49 +0000
From: Will Deacon <will@...nel.org>
To: kvmarm@...ts.linux.dev,
	Oliver Upton <oliver.upton@...ux.dev>
Cc: catalin.marinas@....com,
	kernel-team@...roid.com,
	Will Deacon <will@...nel.org>,
	Marc Zyngier <maz@...nel.org>,
	Joey Gouly <joey.gouly@....com>,
	Suzuki K Poulose <suzuki.poulose@....com>,
	Zenghui Yu <yuzenghui@...wei.com>,
	Mingwei Zhang <mizhang@...gle.com>,
	Colton Lewis <coltonlewis@...gle.com>,
	Raghavendra Rao Ananta <rananta@...gle.com>,
	Mark Rutland <mark.rutland@....com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 00/18] KVM: arm64: Support FEAT_PMUv3 on Apple hardware

On Tue, 17 Dec 2024 13:20:30 -0800, Oliver Upton wrote:
> One of the interesting features of some Apple M* parts is an IMPDEF trap
> that routes EL1/EL0 accesses of the PMUv3 registers to EL2. This allows
> a hypervisor to emulate an architectural PMUv3 on top of the IMPDEF PMU
> hardware present in the CPU.
> 
> And if you squint, this _might_ look like a CPU erratum :-)
> 
> [...]

Applied the branch events patch to will (for-next/perf), thanks!

[03/18] drivers/perf: apple_m1: Map generic branch events
        https://git.kernel.org/will/c/4575353d82e2

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev