[PATCH v3 0/3] Add multiprocessor wake-up support

[Kuppuswamy Sathyanarayanan]

Add multiprocessor wakeup support using MADT ACPI table for x86
platforms. It uses mailbox based mechanism to wake up the APs. You
can get more details about the ACPI table and mailbox protocol in
Guest-Host-Communication Interface (GHCI) for Intel Trust Domain
Extensions (Intel TDX) specification document (sec 4.1)

https://software.intel.com/content/dam/develop/external/us/en/documents/intel-tdx-guest-hypervisor-communication-interface.pdf

Changes since v2:
 * Moved acpi_wake_cpu_handler_update() definition to
   arch/x86/kernel/apic/apic.c
 * Added comments for WRITE_ONCE() usage.
 * Added error handling support to prevent re-trigger of
   acpi_wakeup_cpu() and to detect the failure case.

Changes since v1:
 * Removed signoff from Rob and Erik.

Kuppuswamy Sathyanarayanan (3):
  ACPICA: ACPI 6.4: MADT: add Multiprocessor Wakeup Mailbox Structure
  ACPI/table: Print MADT Wake table information
  x86/acpi, x86/boot: Add multiprocessor wake-up support

 arch/x86/include/asm/apic.h |  3 ++
 arch/x86/kernel/acpi/boot.c | 79 +++++++++++++++++++++++++++++++++++++
 arch/x86/kernel/apic/apic.c |  8 ++++
 drivers/acpi/tables.c       | 11 ++++++
 include/acpi/actbl2.h       | 14 +++++++
 5 files changed, 115 insertions(+)

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2.25.1