[PATCH v4 00/25] x86: Enhance MTRR functionality to support multiple CPUs

Bin Meng bmeng.cn at gmail.com
Fri Jul 17 06:50:55 CEST 2020


Hi Simon,

On Fri, Jul 17, 2020 at 11:24 AM Simon Glass <sjg at chromium.org> wrote:
>
> Hi Bin,
>
> On Tue, 7 Jul 2020 at 19:36, Simon Glass <sjg at chromium.org> wrote:
> >
> > At present MTRRs are mirrored to the secondary CPUs only once, as those
> > CPUs are started up. But U-Boot may add more MTRRs later, e.g. if it
> > decides that a video console must be set up.
> >
> > This series enhances the x86 multi-processor support to allow MTRRs to
> > be updated at any time. It also updates the 'mtrr' command to support
> > setting the MTRRs on CPUs other than the boot CPU.
> >
> > Changes in v4:
> > - Update get_bsp() to return zero when SMP is not inited
> > - Add a Kconfig to control this feature, enabled only on APL
> > - Only enable this feature of CONFIG_SMP_AP_WORK is enabled
> > - Allow running on the BSP if SMP is not enabled
> > - Update mp_next_cpu() to stop if CONFIG_SMP_AP_WORK is not enabled
>
> Is anything else needed with this series?

This series needs to be rebased on top of u-boot-x86/master. Currently
it does not apply.

Regards,
Bin


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