Re: [PATCH v3 2/6] xen/x86: Add initial x2APIC ID to the per-vLAPIC save area

[Roger Pau Monné <roger.pau@xxxxxxxxxx>]

On Wed, May 29, 2024 at 03:32:31PM +0100, Alejandro Vallejo wrote:
> This allows the initial x2APIC ID to be sent on the migration stream. The
> hardcoded mapping x2apic_id=2*vcpu_id is maintained for the time being.
> Given the vlapic data is zero-extended on restore, fix up migrations from
> hosts without the field by setting it to the old convention if zero.
> 
> x2APIC IDs are calculated from the CPU policy where the guest topology is
> defined. For the time being, the function simply returns the old
> relationship, but will eventually return results consistent with the
> topology.
> 
> Signed-off-by: Alejandro Vallejo <alejandro.vallejo@xxxxxxxxx>

Reviewed-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>

Thanks, Roger.