linux-kernel - Re: [PATCH v3 10/22] arm64: capabilities: Allow features based on local CPU scope

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Message-ID: <076d272e-d056-6316-7dff-2c123578f89a@arm.com>
Date:   Thu, 8 Mar 2018 12:14:49 +0000
From:   Suzuki K Poulose <Suzuki.Poulose@....com>
To:     Dave Martin <Dave.Martin@....com>
Cc:     linux-arm-kernel@...ts.infradead.org, mark.rutland@....com,
        ckadabi@...eaurora.org, ard.biesheuvel@...aro.org,
        marc.zyngier@....com, catalin.marinas@....com, will.deacon@....com,
        linux-kernel@...r.kernel.org, jnair@...iumnetworks.com,
        robin.murphy@....com
Subject: Re: [PATCH v3 10/22] arm64: capabilities: Allow features based on
 local CPU scope

On 09/02/18 18:22, Dave Martin wrote:
> On Fri, Feb 09, 2018 at 05:54:49PM +0000, Suzuki K Poulose wrote:
>> So far we have treated the feature capabilities as system wide
>> and this doesn't help with features that could be detected on
> 
> doesn't -> wouldn't (since no such features exist yet)
> 
> detected to "detected locally" (maybe)
> 

Sure, fixed.

>> one or more CPUs (e.g, KPTI, Software prefetch). This patch
>> splits the feature detection to two phases :
>>
>>   1) Local CPU features are checked on all boot time active CPUs.
>>   2) System wide features are checked only once after all CPUs are
>>      active.
>>
>> Cc: Dave Martin <dave.martin@....com>
>> Signed-off-by: Suzuki K Poulose <suzuki.poulose@....com>
> 
> Otherwise,
> 
> Reviewed-by: Dave Martin <Dave.Martin@....com>
> 

Thanks,

Suzuki