linux-kernel - Re: [PATCH v5 2/3] arch/arm64: fpsimd: Introduce fpsimd_save_and_flush_cpu

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Message-ID: <f5d4c8d2-9958-8257-8268-6b61ca485d60@arm.com>
Date:   Tue, 4 Jun 2019 12:52:27 +0100
From:   Marc Zyngier <marc.zyngier@....com>
To:     Catalin Marinas <catalin.marinas@....com>,
        Julien Grall <julien.grall@....com>
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        kvmarm@...ts.cs.columbia.edu, will.deacon@....com,
        christoffer.dall@....com, james.morse@....com,
        julien.thierry@....com, suzuki.poulose@....com,
        Dave.Martin@....com, ard.biesheuvel@...aro.org
Subject: Re: [PATCH v5 2/3] arch/arm64: fpsimd: Introduce
 fpsimd_save_and_flush_cpu_state() and use it

On 04/06/2019 12:12, Catalin Marinas wrote:
> On Tue, May 21, 2019 at 06:21:38PM +0100, Julien Grall wrote:
>> The only external user of fpsimd_save() and fpsimd_flush_cpu_state() is
>> the KVM FPSIMD code.
>>
>> A following patch will introduce a mechanism to acquire owernship of the
>> FPSIMD/SVE context for performing context management operations. Rather
>> than having to export the new helpers to get/put the context, we can just
>> introduce a new function to combine fpsimd_save() and
>> fpsimd_flush_cpu_state().
>>
>> This has also the advantage to remove any external call of fpsimd_save()
>> and fpsimd_flush_cpu_state(), so they can be turned static.
>>
>> Lastly, the new function can also be used in the PM notifier.
>>
>> Signed-off-by: Julien Grall <julien.grall@....com>
>> Reviewed-by: Dave Martin <Dave.Martin@....com>
> [...]
>> ---
>>  arch/arm64/include/asm/fpsimd.h |  4 +---
>>  arch/arm64/kernel/fpsimd.c      | 17 +++++++++++++----
>>  arch/arm64/kvm/fpsimd.c         |  4 +---
>>  3 files changed, 15 insertions(+), 10 deletions(-)
> 
> Marc, since this touches KVM, can I get an ack on this patch? I plan to
> queue the series.

Sure. Please add my

Acked-by: Marc Zyngier <marc.zyngier@....com>

to the whole series.

Thanks,

	M.
-- 
Jazz is not dead. It just smells funny...