linux-kernel - Re: (subset) [PATCH V2 0/7] arm64/boot: Enable EL2 requirements for FEAT

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Message-ID: <Z7TaOUcjP0kME5ly@arm.com>
Date: Tue, 18 Feb 2025 19:06:33 +0000
From: Catalin Marinas <catalin.marinas@....com>
To: linux-arm-kernel@...ts.infradead.org,
	Anshuman Khandual <anshuman.khandual@....com>
Cc: Will Deacon <will@...nel.org>, Marc Zyngier <maz@...nel.org>,
	Ryan Roberts <ryan.roberts@....com>,
	Mark Rutland <mark.rutland@....com>, Mark Brown <robh@...nel.org>,
	Oliver Upton <oliver.upton@...ux.dev>,
	Jonathan Corbet <corbet@....net>,
	Eric Auger <eric.auger@...hat.com>, kvmarm@...ts.linux.dev,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: (subset) [PATCH V2 0/7] arm64/boot: Enable EL2 requirements for
 FEAT_PMUv3p9

On Tue, Feb 18, 2025 at 07:03:49PM +0000, Catalin Marinas wrote:
> On Mon, 03 Feb 2025 10:38:21 +0530, Anshuman Khandual wrote:
> > This series adds fine grained trap control in EL2 required for FEAT_PMUv3p9
> > registers like PMICNTR_EL0, PMICFILTR_EL0, and PMUACR_EL1 which are already
> > being used in the kernel. This is required to prevent their EL1 access trap
> > into EL2.
> > 
> > PMZR_EL0 register trap control i.e HDFGWTR2_EL2.nPMZR_EL0 remains unchanged
> > for now as it does not get accessed in the kernel, and there is no plan for
> > its access from user space.
> > 
> > [...]
> 
> Applied to arm64 (for-next/el2-enable-feat-pmuv3p9), thanks!
> 
> [7/7] arm64/boot: Enable EL2 requirements for FEAT_PMUv3p9
>       https://git.kernel.org/arm64/c/f134bbc054ae

"b4 ty" ignored the other patches. I applied the sysreg ones to the
arm64 for-next/sysreg branch in case they need to get pulled into other
trees (e.g. KVM). The above patch is on top of the other sysreg patches.

-- 
Catalin