Branch: refs/heads/master
Home: https://github.com/tianocore/edk2
Commit: 121af960e2ac152be2c441837595a4c6e2a143f5
https://github.com/tianocore/edk2/commit/121af960e2ac152be2c441837595a4c6e2a143f5
Author: Gerd Hoffmann <[email protected]>
Date: 2024-09-13 (Fri, 13 Sep 2024)
Changed paths:
M OvmfPkg/CpuHotplugSmm/CpuHotplug.c
Log Message:
-----------
OvmfPkg/CpuHotplugSmm: delay SMM exit
Let APs wait until the BSP has completed the register updates to remove
the CPU. This makes sure all APs stay in SMM mode until the CPU
hot-unplug operation is complete, which in turn makes sure the ACPI lock
is released only after the CPU hot-unplug operation is complete.
Some background: The CPU hotplug SMI is triggered from an ACPI function
which is protected by an ACPI lock. The ACPI function is in the ACPI
tables generated by qemu.
Signed-off-by: Gerd Hoffmann <[email protected]>
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