linux-kernel - Re: [PATCH 2/3] arm64: export acpi_psci_use

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Date:   Wed, 5 Jun 2019 10:40:31 +0100
From:   Sudeep Holla <sudeep.holla@....com>
To:     Ali Saidi <alisaidi@...zon.com>
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-crypto@...r.kernel.org,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Arnd Bergmann <arnd@...db.de>,
        Catalin Marinas <catalin.marinas@....com>,
        Matt Mackall <mpm@...enic.com>,
        Will Deacon <will.deacon@....com>,
        Ron Rindjunsky <ronrindj@...zon.com>,
        David Woodhouse <dwmw@...zon.co.uk>,
        Sudeep Holla <sudeep.holla@....com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH 2/3] arm64: export acpi_psci_use_hvc

On Tue, Jun 04, 2019 at 08:30:59PM +0000, Ali Saidi wrote:
> Allow a module that wants to make SMC calls to detect if it should be
> using smc or hvc.
>
> Signed-off-by: Ali Saidi <alisaidi@...zon.com>
> ---
>  arch/arm64/kernel/acpi.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/arch/arm64/kernel/acpi.c b/arch/arm64/kernel/acpi.c
> index 803f0494dd3e..ea41c6541d3c 100644
> --- a/arch/arm64/kernel/acpi.c
> +++ b/arch/arm64/kernel/acpi.c
> @@ -119,6 +119,7 @@ bool acpi_psci_use_hvc(void)
>  {
>  	return acpi_gbl_FADT.arm_boot_flags & ACPI_FADT_PSCI_USE_HVC;
>  }
> +EXPORT_SYMBOL_GPL(acpi_psci_use_hvc);
>

I would rather have this in drivers/firmware/psci/psci.c checking the
value of psci_ops.conduit so that it's not just ACPI specific and can
be used on DT platforms too if required.

--
Regards,
Sudeep