17 Jul
2020
17 Jul
'20
5:24 a.m.
Hi Bin,
On Tue, 7 Jul 2020 at 19:36, Simon Glass sjg@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?
Regards, Simon