On Tue, 3 Jan 2017, Boris Ostrovsky wrote: > Signed-off-by: Boris Ostrovsky <boris.ostrov...@oracle.com> > Reviewed-by: Konrad Rzeszutek Wilk <konrad.w...@oracle.com> > --- > CC: George Dunlap <george.dun...@eu.citrix.com> > CC: Konrad Rzeszutek Wilk <konrad.w...@oracle.com> > CC: Stefano Stabellini <sstabell...@kernel.org> > CC: Tim Deegan <t...@xen.org> > --- > Changes in v6: > * No GPE0 update is needed anymore. > > docs/misc/hvmlite.markdown | 11 +++++++++++ > 1 file changed, 11 insertions(+) > > diff --git a/docs/misc/hvmlite.markdown b/docs/misc/hvmlite.markdown > index 898b8ee..472edee 100644 > --- a/docs/misc/hvmlite.markdown > +++ b/docs/misc/hvmlite.markdown > @@ -75,3 +75,14 @@ info structure that's passed at boot time (field > rsdp_paddr). > > Description of paravirtualized devices will come from XenStore, just as it's > done for HVM guests. > + > +## VCPU hotplug ## > + > +VCPU hotplug (e.g. 'xl vcpu-set <domain> <num_vcpus>') for PVHv2 guests > +follows ACPI model where change in domain's number of VCPUS (stored in > +domain.avail_vcpus) results in an SCI being sent to the guest. The guest > +then executes DSDT's PRSC method, updating MADT enable status for the > +affected VCPU. > + > +Updating VCPU number is achieved by having the toolstack issue a write to > +ACPI's XEN_ACPI_CPU_MAP.
Looking at 1483452256-2879-10-git-send-email-boris.ostrov...@oracle.com, this is done via domctl. I think it is worth documenting that. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
