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| author | Tony Krowiak <akrowiak@linux.ibm.com> | 2018-10-10 13:03:05 -0400 |
|---|---|---|
| committer | Cornelia Huck <cohuck@redhat.com> | 2018-10-12 11:32:18 +0200 |
| commit | 1d7db85b61cb9888b8ed8c8923343b468405b7a0 (patch) | |
| tree | 0196a99c2af48025ebba3b5ae6e63093d308f849 /os-posix.c | |
| parent | c5cd17afddda89376712b315a41ede96b034e4c2 (diff) | |
| download | qemu-1d7db85b61cb9888b8ed8c8923343b468405b7a0.zip qemu-1d7db85b61cb9888b8ed8c8923343b468405b7a0.tar.gz qemu-1d7db85b61cb9888b8ed8c8923343b468405b7a0.tar.bz2 | |
s390x/kvm: enable AP instruction interpretation for guest
Let's use the KVM_SET_DEVICE_ATTR ioctl to enable hardware
interpretation of AP instructions executed on the guest.
If the S390_FEAT_AP feature is switched on for the guest,
AP instructions must be interpreted by default; otherwise,
they will be intercepted.
This attribute setting may be overridden by a device. For example,
a device may want to provide AP instructions to the guest (i.e.,
S390_FEAT_AP turned on), but it may want to emulate them. In this
case, the AP instructions executed on the guest must be
intercepted; so when the device is realized, it must disable
interpretation.
Signed-off-by: Tony Krowiak <akrowiak@linux.ibm.com>
Tested-by: Pierre Morel <pmorel@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Halil Pasic <pasic@linux.ibm.com>
Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
Message-Id: <20181010170309.12045-4-akrowiak@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Diffstat (limited to 'os-posix.c')
0 files changed, 0 insertions, 0 deletions