ATCH] x86/ACPI/cstate: Allow ACPI C1 FFH MWAIT use on
> AMD systems
>
> On Wed 2017-05-17 09:20:19, Yazen Ghannam wrote:
> > From: Yazen Ghannam
> >
> > AMD systems support the Monitor/Mwait instructions and these can be
> > used for ACPI C1 in the same way
On Tue, May 23, 2017 at 12:50:15PM +, Ghannam, Yazen wrote:
> No, AMD systems will continue to use HLT unless the BIOS specifies the
> use of MWAIT using a FFH entry in the ACPI _CST.
>
> All this change does is *allow* us to use MWAIT through the FFH
> implementation if the BIOS defines it. I
> Subject: Re: [PATCH] x86/ACPI/cstate: Allow ACPI C1 FFH MWAIT use on
> AMD systems
>
> On Mon, May 22, 2017 at 08:20:56PM +, Ghannam, Yazen wrote:
> > On the other hand, MWAIT on AMD limits the hardware to using only
> > certain, shallower Cstates. This is okay if we d
On Wed 2017-05-17 09:20:19, Yazen Ghannam wrote:
> From: Yazen Ghannam
>
> 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 t
On Mon, May 22, 2017 at 08:20:56PM +, Ghannam, Yazen wrote:
> On the other hand, MWAIT on AMD limits the hardware to using only certain,
> shallower Cstates. This is okay if we define individual states and use MWAIT
> for some of them. But it would consume more power if used always.
Let me see
> -Original Message-
> From: Borislav Petkov [mailto:b...@alien8.de]
> Sent: Monday, May 22, 2017 12:22 PM
>
...
> What about x86_idle?
>
> That whole select_idle_routine() jumping through hoops. That's still doing
> default_idle() on Zen, AFAICT.
>
> Or am I missing something?
>
> Be
On Wed, May 17, 2017 at 09:20:19AM -0500, Yazen Ghannam wrote:
> From: Yazen Ghannam
>
> 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 syst
From: Yazen Ghannam
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 Gh
8 matches
Mail list logo
