Messages in this thread | | | Subject | Re: [PATCH v4 1/1] x86/acpi, x86/boot: Add multiprocessor wake-up support | From | "Kuppuswamy, Sathyanarayanan" <> | Date | Fri, 21 May 2021 07:18:41 -0700 |
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Hi Rafael,
On 5/13/21 2:37 PM, Kuppuswamy Sathyanarayanan wrote: > As per ACPI specification r6.4, sec 5.2.12.19, a new sub > structure – multiprocessor wake-up structure - is added to the > ACPI Multiple APIC Description Table (MADT) to describe the > information of the mailbox. If a platform firmware produces the > multiprocessor wake-up structure, then OS may use this new > mailbox-based mechanism to wake up the APs. > > Add ACPI MADT wake table parsing support for x86 platform and if > MADT wake table is present, update apic->wakeup_secondary_cpu with > new API which uses MADT wake mailbox to wake-up CPU. > > Co-developed-by: Sean Christopherson<sean.j.christopherson@intel.com> > Signed-off-by: Sean Christopherson<sean.j.christopherson@intel.com> > Signed-off-by: Kuppuswamy Sathyanarayanan<sathyanarayanan.kuppuswamy@linux.intel.com> > Reviewed-by: Andi Kleen<ak@linux.intel.com> > ---
Any comments on this patch?
> > Changes since v3: > * Removed acpi_mp_wake_mailbox_init() and moved init code to > acpi_wakeup_cpu(). > * Removed redundant NULL pointer check for acpi_mp_wake_mailbox. > * Added comments/debug prints as per Rafael's suggestion. > * Removed MADT/SVKL ACPI patches from this patchset. It will be > merged via ACPICA submission. > > arch/x86/include/asm/apic.h | 3 ++ > arch/x86/kernel/acpi/boot.c | 95 +++++++++++++++++++++++++++++++++++++ > arch/x86/kernel/apic/apic.c | 8 ++++ > 3 files changed, 106 insertions(+)
-- Sathyanarayanan Kuppuswamy Linux Kernel Developer
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