Re: [PATCH v7 1/1] x86/acpi, x86/boot: Add multiprocessor wake-up support

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Hi x86 Maintainers,

On 8/17/21 6:55 AM, Kuppuswamy, Sathyanarayanan wrote:
Hi,

On 7/19/21 9:25 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@xxxxxxxxx>
Signed-off-by: Sean Christopherson<sean.j.christopherson@xxxxxxxxx>
Reviewed-by: Andi Kleen<ak@xxxxxxxxxxxxxxx>
Reviewed-by: Rafael J. Wysocki<rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Kuppuswamy Sathyanarayanan<sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx>
---

Changes since v6:
  * Rebased on top of v5.14-rc1.

Changes since v5:
  * None ( CCed ACPI list)

Changes since v4:
  * Used smp_store_release() in place of WRITE_ONCE().
  * Addressed some checkpatch warnings.

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.


Gentle ping! Any comments on this patch?

I think I have addressed all the comments raised by the reviewers. So, Can you
please consider queuing this patch for next merge window ?



--
Sathyanarayanan Kuppuswamy
Linux Kernel Developer



[Index of Archives]     [Linux IBM ACPI]     [Linux Power Management]     [Linux Kernel]     [Linux Laptop]     [Kernel Newbies]     [Share Photos]     [Security]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Samba]     [Video 4 Linux]     [Device Mapper]     [Linux Resources]

  Powered by Linux