On Thu Sep 11, 2025 at 5:07 PM CEST, Jan Beulich wrote:
> On 11.09.2025 13:53, Alejandro Vallejo wrote:
>> PVH guests have no DM, so this causes the guest to fetch the online CPU
>> bitmap from an unbacked 0xaf00 PIO port when executing the GPE handler.
>>
>> Seeing how ACPI CPU hotplug is the only event delivered via GPE, remove
>> the GPE handler in addition to anything ACPI CPU hotplug related.
>>
>> This shrinks PVH's DSDT substantially and prevents spuriously executing
>> a large amount of AML with no purpose at all.
>>
>> Signed-off-by: Alejandro Vallejo <[email protected]>
>
> Reviewed-by: Jan Beulich <[email protected]>
Thanks
>
>> ---
>> v2:
>> * Adjusted commit message
>> * All other tags except S-by moved to patch 1.
>
> This will want backporting; I expect finding a suitable commit for a Fixes:
> tag is somewhat difficult.
>
> Jan
I'd say it's the patch that needlessly enabled GPE handling on PVH.
Fixes: 062975dc9441("acpi: PVH guests need _E02 method")
Cheers,
Alejandro
