xen_acpi_processor driver is bound to dom0 vcpu count

I think I’ve just uncovered a rather nasty bug in the xen_acpi_processor driver in dom0. If the vcpu count in dom0 is set to anything other than the exact number of physical cores, the xen_acpi_processor kernel driver will fail to upload the C-state information for those cores to Xen, resulting

ACPI C3 issues on Meteor Lake with HVMs

Hi, Hoping someone smarter than I can help out here 🙂 I have a Meteor Lake machine which has the new P/E core architecture. I am trying to optimise a mobile platform for on-battery runtime and from the documentation I have read this requires CPUs to be in ACPI state C3 (which corresponds to pla

Re: ACPI C3 issues on Meteor Lake with HVMs

Please disregard this email, it was sent to the wrong list. > On 28 Jul 2025, at 07:16, m...@alex0.net wrote: > > Hi, > > Hoping someone smarter than I can help out here 🙂 I have a Meteor Lake > machine which has the new P/E core architecture. I am trying to optimise a > mobile platform for on