From: Jeffrey Hugo <jhugo@codeaurora.org>
To: Will Deacon <will@kernel.org>,
Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org
Subject: Re: [PATCH v2] arm64: cpufeature: Enable Qualcomm Falkor errata 1009 for Kryo
Date: Thu, 31 Oct 2019 08:17:18 -0600 [thread overview]
Message-ID: <24673fd9-3c1c-04f6-eb2e-525f8546ebf3@codeaurora.org> (raw)
In-Reply-To: <20191031132914.GD27196@willie-the-truck>
On 10/31/2019 6:29 AM, Will Deacon wrote:
> [+Jeffrey]
>
> On Tue, Oct 29, 2019 at 04:27:38PM -0700, Bjorn Andersson wrote:
>> The Kryo cores share errata 1009 with Falkor, so add their model
>> definitions and enable it for them as well.
>>
>> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
>> ---
>>
>> Changes since v1:
>> - Use is_kryo_midr(), rather than listing each individual model.
>
> Cheers, I've queued this up as a fix.
>
> I also updated the E1009 entry in silicon-errata.rst but, in doing so, I
> noticed that E1041 is listed there which apparently also affects
> Kry^H^H^HHydra [1].
>
> At which point, maybe we should rename both Kryo and Falkor in the tree
> so that we consistently refer to Hydra as the underlying micro-architecture.
> Obviously not something for 5.4, but it would sure help me to understand
> what's doing on here.
>
> Thoughts?
Unfortunately, Falkor is also an underlying micro-architecture, it just
happens to be strongly related to Hydra so a fair amount of the errata
affect both.
I don't want to be difficult. For ultimate "correctness", Falkor and
Hydra should probably be separate, however the Falkor architecture is
not widespread and unlikely to have much churn going forward. So I
think if it makes life easier for you, all the Falkor stuff can probably
be scrubbed and just merged into Hydra.
>
> Will
>
> [1] https://lore.kernel.org/kvmarm/20171115010505.GO11955@codeaurora.org/
>
--
Jeffrey Hugo
Qualcomm Technologies, Inc. is a member of the
Code Aurora Forum, a Linux Foundation Collaborative Project.
prev parent reply other threads:[~2019-10-31 14:17 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-29 23:27 [PATCH v2] arm64: cpufeature: Enable Qualcomm Falkor errata 1009 for Kryo Bjorn Andersson
2019-10-31 13:29 ` Will Deacon
2019-10-31 14:17 ` Jeffrey Hugo [this message]
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