Commit 112c24d4 authored by Tony Krowiak's avatar Tony Krowiak Committed by Christian Borntraeger

KVM: s390: CPU model support for AP virtualization

Introduces two new CPU model facilities to support
AP virtualization for KVM guests:

1. AP Query Configuration Information (QCI) facility is installed.

   This is indicated by setting facilities bit 12 for
   the guest. The kernel will not enable this facility
   for the guest if it is not set on the host.

   If this facility is not set for the KVM guest, then only
   APQNs with an APQI less than 16 will be used by a Linux
   guest regardless of the matrix configuration for the virtual
   machine. This is a limitation of the Linux AP bus.

2. AP Facilities Test facility (APFT) is installed.

   This is indicated by setting facilities bit 15 for
   the guest. The kernel will not enable this facility for
   the guest if it is not set on the host.

   If this facility is not set for the KVM guest, then no
   AP devices will be available to the guest regardless of
   the guest's matrix configuration for the virtual
   machine. This is a limitation of the Linux AP bus.
Signed-off-by: default avatarTony Krowiak <akrowiak@linux.ibm.com>
Reviewed-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: default avatarHalil Pasic <pasic@linux.ibm.com>
Reviewed-by: default avatarDavid Hildenbrand <david@redhat.com>
Tested-by: default avatarMichael Mueller <mimu@linux.ibm.com>
Tested-by: default avatarFarhan Ali <alifm@linux.ibm.com>
Acked-by: default avatarCornelia Huck <cohuck@redhat.com>
Message-Id: <20180925231641.4954-26-akrowiak@linux.vnet.ibm.com>
Signed-off-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
parent 37940fb0
......@@ -106,6 +106,8 @@ static struct facility_def facility_defs[] = {
.name = "FACILITIES_KVM_CPUMODEL",
.bits = (int[]){
12, /* AP Query Configuration Information */
15, /* AP Facilities Test */
156, /* etoken facility */
-1 /* END */
}
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment