tag fdcec015ace98b518b02e35ba8bef49e2b220f0e
tagger Christian Borntraeger <borntraeger@de.ibm.com> Fri Apr 21 11:16:12 2017 +0200
object 730cd632c4e485b90f97fe998e300045da094938

KVM: s390: Guarded storage fixup and keyless subset mode

- detect and use the keyless subset mode (guests without
  storage keys)
- fix vSIE support for sdnxc
- fix machine check data for guarded storage

commit 730cd632c4e485b90f97fe998e300045da094938
author Farhan Ali <alifm@linux.vnet.ibm.com> Fri Feb 24 16:12:56 2017 -0500
committer Christian Borntraeger <borntraeger@de.ibm.com> Fri Apr 21 11:08:11 2017 +0200
tree 894c8643cbfbaa47b6973cd34a3e054840513e47
parent 71cb1bf66ef0d1d36ff3f04150450df9dd8af654

KVM: s390: Support keyless subset guest mode

If the KSS facility is available on the machine, we also make it
available for our KVM guests.

The KSS facility bypasses storage key management as long as the guest
does not issue a related instruction. When that happens, the control is
returned to the host, which has to turn off KSS for a guest vcpu
before retrying the instruction.

Signed-off-by: Corey S. McQuay <csmcquay@linux.vnet.ibm.com>
Signed-off-by: Farhan Ali <alifm@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>