Re: [PATCHv10 04/18] cpu/hotplug, x86/acpi: Disable CPU offlining for ACPI MADT wakeup

[Dave Hansen]

On 4/24/24 07:35, Kirill A. Shutemov wrote:
>> Also, does this need to go to stable although it is kinda big for
>> stable. If stable, do we need a smaller fix first which is backportable?
> Correct me, if I am wrong, but I believe TDX guest is the only user of
> ACPI MADT wake up method. At least it was added into kernel for TDX guest.
> So it wouldn't fix anything user-visible. It might affect a future
> platform that uses this wake up method, but it is a guessing game.

Yeah, the MADT wakeup is pretty funky, highly TDX specific, and not in
use or planned to be _put_ into use anywhere else.  The X86S "fix" for
running in real mode does something else entirely:

	https://cdrdv2.intel.com/v1/dl/getContent/776648