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| author |   Christian Borntraeger <borntraeger@de.ibm.com> | 2020-01-31 05:02:00 -0500 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2020-01-31 12:49:24 +0100 |
| commit | 55680890ea78be0df5e1384989f1be835043c084 (patch) | |
| tree | 6318318b1aff2a5db2db688b4fb46f0d0f19aff2 /arch/s390/kernel | |
| parent | KVM: s390: ENOTSUPP -> EOPNOTSUPP fixups (diff) | |
| download | linux-dev-55680890ea78be0df5e1384989f1be835043c084.tar.xz linux-dev-55680890ea78be0df5e1384989f1be835043c084.zip | |
KVM: s390: do not clobber registers during guest reset/store status
The initial CPU reset clobbers the userspace fpc and the store status
ioctl clobbers the guest acrs + fpr. As these calls are only done via
ioctl (and not via vcpu_run), no CPU context is loaded, so we can (and
must) act directly on the sync regs, not on the thread context.
Cc: stable@kernel.org
Fixes: e1788bb995be ("KVM: s390: handle floating point registers in the run ioctl not in vcpu_put/load")
Fixes: 31d8b8d41a7e ("KVM: s390: handle access registers in the run ioctl not in vcpu_put/load")
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Link: https://lore.kernel.org/r/20200131100205.74720-2-frankja@linux.ibm.com
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel')
0 files changed, 0 insertions, 0 deletions