linux-kernel - Re: [PATCH v5 01/24] arm64: cpufeature: Add cpucap for HPMN0

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Message-ID: <d3e946ec-787a-424a-9a7a-f04aeb490ba6@arm.com>
Date: Wed, 10 Dec 2025 10:54:10 +0000
From: Suzuki K Poulose <suzuki.poulose@....com>
To: Colton Lewis <coltonlewis@...gle.com>, kvm@...r.kernel.org
Cc: Paolo Bonzini <pbonzini@...hat.com>, Jonathan Corbet <corbet@....net>,
 Russell King <linux@...linux.org.uk>,
 Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>,
 Marc Zyngier <maz@...nel.org>, Oliver Upton <oliver.upton@...ux.dev>,
 Mingwei Zhang <mizhang@...gle.com>, Joey Gouly <joey.gouly@....com>,
 Zenghui Yu <yuzenghui@...wei.com>, Mark Rutland <mark.rutland@....com>,
 Shuah Khan <shuah@...nel.org>,
 Ganapatrao Kulkarni <gankulkarni@...amperecomputing.com>,
 linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.linux.dev,
 linux-perf-users@...r.kernel.org, linux-kselftest@...r.kernel.org
Subject: Re: [PATCH v5 01/24] arm64: cpufeature: Add cpucap for HPMN0

On 09/12/2025 20:50, Colton Lewis wrote:
> Add a capability for FEAT_HPMN0, whether MDCR_EL2.HPMN can specify 0
> counters reserved for the guest.
> 
> This required changing HPMN0 to an UnsignedEnum in tools/sysreg
> because otherwise not all the appropriate macros are generated to add
> it to arm64_cpu_capabilities_arm64_features.
> 
> Acked-by: Mark Rutland <mark.rutland@....com>
> Signed-off-by: Colton Lewis <coltonlewis@...gle.com>

Reviewed-by: Suzuki K Poulose <suzuki.poulose@....com>