diff options
| author | Christian Borntraeger <borntraeger@de.ibm.com> | 2020-01-31 05:02:00 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-02-11 04:34:11 -0800 |
| commit | d1568e6370ba0a024e62827da45d92d3b68181b5 (patch) | |
| tree | 87bf2ec5e897c2d0043b783912f8cca275951a5e /include/linux/wait_bit.h | |
| parent | f6bf858cb2db0dd4cce79bba43b0a192259699bc (diff) | |
KVM: s390: do not clobber registers during guest reset/store status
commit 55680890ea78be0df5e1384989f1be835043c084 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/wait_bit.h')
0 files changed, 0 insertions, 0 deletions