Re: [PATCH] x86/ACPI/cstate: Allow ACPI C1 FFH MWAIT use on AMD systems

From: Pavel Machek
Date: Tue May 23 2017 - 08:24:52 EST


On Wed 2017-05-17 09:20:19, Yazen Ghannam wrote:
> From: Yazen Ghannam <yazen.ghannam@xxxxxxx>
>
> AMD systems support the Monitor/Mwait instructions and these can be used
> for ACPI C1 in the same way as on Intel systems, with appropriate BIOS
> support.
>
> Allow ffh_cstate_init() to succeed on AMD systems and make the Cstate
> description vendor-agnostic.
>
> Signed-off-by: Yazen Ghannam <yazen.ghannam@xxxxxxx>
> ---
> arch/x86/kernel/acpi/cstate.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/arch/x86/kernel/acpi/cstate.c b/arch/x86/kernel/acpi/cstate.c
> index 8a908ae..4c5dd5d 100644
> --- a/arch/x86/kernel/acpi/cstate.c
> +++ b/arch/x86/kernel/acpi/cstate.c
> @@ -109,7 +109,7 @@ static long acpi_processor_ffh_cstate_probe_cpu(void *_cx)
> cx->type);
> }
> snprintf(cx->desc,
> - ACPI_CX_DESC_LEN, "ACPI FFH INTEL MWAIT 0x%x",
> + ACPI_CX_DESC_LEN, "ACPI FFH X86 MWAIT 0x%x",
> cx->address);
> out:
> return retval;

Are you sure no userspace depends on word "INTEL" there?

Does it make sense to include "X86" there?
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
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