linux-kernel - Re: [PATCH 7/9] arm/arm64: Provide a wrapper for SMCCC 1.1 calls

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Message-ID: <20190805100313.x65743i3n4qx6gyc@willie-the-truck>
Date:   Mon, 5 Aug 2019 11:03:14 +0100
From:   Will Deacon <will@...nel.org>
To:     Steven Price <steven.price@....com>
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Marc Zyngier <maz@...nel.org>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        Russell King <linux@...linux.org.uk>,
        James Morse <james.morse@....com>,
        Julien Thierry <julien.thierry.kdev@...il.com>,
        Suzuki K Pouloze <suzuki.poulose@....com>,
        kvm@...r.kernel.org, kvmarm@...ts.cs.columbia.edu,
        linux-arm-kernel@...ts.infradead.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 7/9] arm/arm64: Provide a wrapper for SMCCC 1.1 calls

On Fri, Aug 02, 2019 at 03:50:15PM +0100, Steven Price wrote:
> SMCCC 1.1 calls may use either HVC or SMC depending on the PSCI
> conduit. Rather than coding this in every call site provide a macro
> which uses the correct instruction. The macro also handles the case
> where no PSCI conduit is configured returning a not supported error
> in res, along with returning the conduit used for the call.
> 
> This allow us to remove some duplicated code and will be useful later
> when adding paravirtualized time hypervisor calls.
> 
> Signed-off-by: Steven Price <steven.price@....com>
> ---
>  include/linux/arm-smccc.h | 44 +++++++++++++++++++++++++++++++++++++++
>  1 file changed, 44 insertions(+)

Acked-by: Will Deacon <will@...nel.org>

Will