From: Will Deacon <will@kernel.org>
To: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: linux-arm-kernel@lists.infradead.org, mark.rutland@arm.com,
Catalin Marinas <catalin.marinas@arm.com>,
Marc Zyngier <maz@kernel.org>, James Morse <james.morse@arm.com>,
kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org
Subject: Re: [PATCH V2] arm64/cpufeature: Drop open encodings while extracting parange
Date: Mon, 18 May 2020 17:59:59 +0100 [thread overview]
Message-ID: <20200518165958.GS32394@willie-the-truck> (raw)
In-Reply-To: <1589360614-1164-1-git-send-email-anshuman.khandual@arm.com>
On Wed, May 13, 2020 at 02:33:34PM +0530, Anshuman Khandual wrote:
> Currently there are multiple instances of parange feature width mask open
> encodings while fetching it's value. Even the width mask value (0x7) itself
> is not accurate. It should be (0xf) per ID_AA64MMFR0_EL1.PARange[3:0] as in
> ARM ARM (0487F.a). Replace them with cpuid_feature_extract_unsigned_field()
> which can extract given standard feature (4 bits width i.e 0xf mask) field.
>
> Cc: Catalin Marinas <catalin.marinas@arm.com>
> Cc: Will Deacon <will@kernel.org>
> Cc: Marc Zyngier <maz@kernel.org>
> Cc: James Morse <james.morse@arm.com>
> Cc: kvmarm@lists.cs.columbia.edu
> Cc: linux-arm-kernel@lists.infradead.org
> Cc: linux-kernel@vger.kernel.org
>
> Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
> ---
> Changes in V2:
>
> - Used cpuid_feature_extract_unsigned_field() per Mark
>
> Changes in V1: (https://patchwork.kernel.org/patch/11541913/)
>
> arch/arm64/kernel/cpufeature.c | 3 ++-
> arch/arm64/kvm/reset.c | 11 ++++++++---
> 2 files changed, 10 insertions(+), 4 deletions(-)
Acked-by: Will Deacon <will@kernel.org>
I'm assuming Marc will take this, but let me know if it should go via arm64
instead (where we have a bunch of other cpufeature stuff queued).
Will
next prev parent reply other threads:[~2020-05-18 17:00 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-13 9:03 [PATCH V2] arm64/cpufeature: Drop open encodings while extracting parange Anshuman Khandual
2020-05-18 16:59 ` Will Deacon [this message]
2020-05-18 17:09 ` Will Deacon
2020-05-18 18:46 ` Marc Zyngier
2020-05-20 14:05 ` Marc Zyngier
2020-05-20 17:54 ` Will Deacon
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