linux-kernel - Re: [PATCH v4 4/5] arm64: Verify CPU errata work arounds on hotplugged CPU

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Message-ID: <571A2A9D.7070702@arm.com>
Date:	Fri, 22 Apr 2016 14:43:57 +0100
From:	Suzuki K Poulose <Suzuki.Poulose@....com>
To:	Catalin Marinas <catalin.marinas@....com>
Cc:	linux-arm-kernel@...ts.infradead.org, mark.rutland@....com,
	marc.zyngier@....com, will.deacon@....com,
	linux-kernel@...r.kernel.org,
	Andre Przywara <andre.przywara@....com>,
	Vadim.Lomovtsev@...iumnetworks.com
Subject: Re: [PATCH v4 4/5] arm64: Verify CPU errata work arounds on
 hotplugged CPU

On 22/04/16 14:40, Catalin Marinas wrote:
> On Fri, Apr 22, 2016 at 12:25:34PM +0100, Suzuki K. Poulose wrote:
>> CPU Errata work arounds are detected and applied to the
>> kernel code at boot time and the data is then freed up.
>> If a new hotplugged CPU requires a work around which
>> was not applied at boot time, there is nothing we can
>> do but simply fail the booting.
>>
>> Cc: Will Deacon <will.deacon@....com>
>> Cc: Mark Rutland <mark.rutland@....com>
>> Cc: Andre Przywara <andre.przywara@....com>
>> Cc: Catalin Marinas <catalin.marinas@....com>
>> Signed-off-by: Suzuki K Poulose <suzuki.poulose@....com>
>
> I think Will commented on this previously. Was a decision made to leave
> this patch as it is and subsequently add support for enabling local
> workarounds for hot-plugged CPUs? I'm fine with this given that most

Yes. Applying work arounds for a hot-plugged CPU will be addressed in a
new series. I updated the cover letter, but missed to update the same here.

>
> Reviewed-by: Catalin Marinas <catalin.marinas@....com>

Thanks
Suzuki