Re: [PATCH v2 2/2] libacpi: Remove CPU hotplug and GPE handling from PVH DSDTs

[Alejandro Vallejo <alejandro.garciavallejo@amd.com>]

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 <alejandro.garciavallejo@amd.com>
>
> Reviewed-by: Jan Beulich <jbeulich@suse.com>

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