linux-kernel - Re: [PATCH] arm64: Fix usage of new shifted MDCR

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Message-ID: <Z0EAhCbhM1B_4vW9@linux.dev>
Date: Fri, 22 Nov 2024 14:07:00 -0800
From: Oliver Upton <oliver.upton@...ux.dev>
To: James Clark <james.clark@...aro.org>
Cc: will@...nel.org, maz@...nel.org, kvmarm@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	Catalin Marinas <catalin.marinas@....com>,
	Joey Gouly <joey.gouly@....com>,
	Suzuki K Poulose <suzuki.poulose@....com>,
	Zenghui Yu <yuzenghui@...wei.com>,
	Yicong Yang <yangyicong@...ilicon.com>,
	Dave Martin <Dave.Martin@....com>, Fuad Tabba <tabba@...gle.com>,
	James Morse <james.morse@....com>,
	Mark Rutland <mark.rutland@....com>,
	Anshuman Khandual <anshuman.khandual@....com>,
	Vincent Donnefort <vdonnefort@...gle.com>,
	Quentin Perret <qperret@...gle.com>, linux-kernel@...r.kernel.org,
	Paolo Bonzini <pbonzini@...hat.com>
Subject: Re: [PATCH] arm64: Fix usage of new shifted MDCR_EL2 values

+cc Paolo

Ugh, sorry for the mess + thanks for the fix James.

Paolo -- would you be able to apply this patch directly to your tree?
This really should go in ASAP.

Otherwise, I'll grab it + send another pull.

On Fri, Nov 22, 2024 at 04:46:35PM +0000, James Clark wrote:
> Since the linked fixes commit, these masks are already shifted so remove
> the shifts. One issue that this fixes is SPE and TRBE not being
> available anymore:
> 
>  arm_spe_pmu arm,spe-v1: profiling buffer owned by higher exception level
> 
> Fixes: 641630313e9c ("arm64: sysreg: Migrate MDCR_EL2 definition to table")
> Signed-off-by: James Clark <james.clark@...aro.org>

Acked-by: Oliver Upton <oliver.upton@...ux.dev>

-- 
Thanks,
Oliver