linux-kernel - Re: [PATCH 2/2] arm64: errata: Update ARM64_ERRATUM

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Date:   Wed, 12 Jan 2022 11:26:03 +0000
From:   Mark Rutland <mark.rutland@....com>
To:     Anshuman Khandual <anshuman.khandual@....com>
Cc:     linux-arm-kernel@...ts.infradead.org,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Suzuki Poulose <suzuki.poulose@....com>,
        coresight@...ts.linaro.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] arm64: errata: Update
 ARM64_ERRATUM_[2119858|2224489] with Cortex-X2 ranges

On Wed, Jan 12, 2022 at 04:36:07PM +0530, Anshuman Khandual wrote:
> 
> 
> On 1/12/22 4:02 PM, Mark Rutland wrote:
> > Hi Anshuman,
> > 
> > On Wed, Jan 12, 2022 at 03:04:59PM +0530, Anshuman Khandual wrote:
> >> Errata ARM64_ERRATUM_[2119858|2224489] also affect some Cortex-X2 ranges as
> >> well. Lets update these errata definition and detection to accommodate all
> >> new Cortex-X2 based cpu MIDR ranges.
> >>
> >> Cc: Catalin Marinas <catalin.marinas@....com>
> >> Cc: Will Deacon <will@...nel.org>
> >> Cc: Mathieu Poirier <mathieu.poirier@...aro.org>
> >> Cc: Suzuki Poulose <suzuki.poulose@....com>
> >> Cc: coresight@...ts.linaro.org
> >> Cc: linux-arm-kernel@...ts.infradead.org
> >> Cc: linux-kernel@...r.kernel.org
> >> Signed-off-by: Anshuman Khandual <anshuman.khandual@....com>
> >> ---
> >>  arch/arm64/Kconfig             | 12 ++++++------
> >>  arch/arm64/kernel/cpu_errata.c |  2 ++
> >>  2 files changed, 8 insertions(+), 6 deletions(-)
> > 
> > I think you've misssed Documentation/arm64/silicon-errata.rst -- for other
> > common errata we add lines for each affected part, e.g. as we do for
> > ARM64_ERRATUM_1418040.
> 
> Sure, will do. I guess Cortex-X2 lines will come just after Cortex-A710
> but before Neoverse-N1.
> 
> +----------------+-----------------+-----------------+-----------------------------+
> | ARM            | Cortex-A710     | #2224489        | ARM64_ERRATUM_2224489       |
> +----------------+-----------------+-----------------+-----------------------------+
> >
> >
> +----------------+-----------------+-----------------+-----------------------------+
> | ARM            | Neoverse-N1     | #1188873,1418040| ARM64_ERRATUM_1418040       |
> +----------------+-----------------+-----------------+-----------------------------+

That sounds right to me, yes.

Thanks,
Mark.