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OvmfPkg/CpuHotplugSmm: delay SMM exit #6138

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merged 2 commits into from
Sep 13, 2024

Commits on Aug 29, 2024

  1. 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]>
    kraxel committed Aug 29, 2024
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Commits on Sep 13, 2024

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