tree 07befc4c9382ce7252b2e59291b10f4d033ce983
parent 74beaf6270f5b08159f1df8208322a24bb2905e6
author Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> 1425315983 -0500
committer David Vrabel <david.vrabel@citrix.com> 1426517354 +0000

x86/xen: Provide a "Xen PV" APIC driver to support >255 VCPUs

Instead of mangling the default APIC driver, provide a Xen PV guest
specific one that explicitly provides appropriate methods.

This allows use to report that all APIC IDs are valid, allowing dom0
to boot with more than 255 VCPUs.

Since the probe order of APIC drivers is link dependent, we add in an
late probe function to change to the Xen PV if it hadn't been done
during bootup.

Suggested-by: David Vrabel <david.vrabel@citrix.com>
Reported-by: Cathy Avery <cathy.avery@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>