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| author | Dong Jia Shi | 2016-09-22 10:36:39 +0200 |
|---|---|---|
| committer | Christian Borntraeger | 2016-09-28 13:24:51 +0200 |
| commit | 9c9f5f311a4b391c2dba57cf06b63d62b790e891 (patch) | |
| tree | cec0f393587b48495c3ee30e0bae230ca2ba9d78 /include/trace.h | |
| parent | s390x/kvm: Fix potential deadlock in sigp handling (diff) | |
| download | qemu-9c9f5f311a4b391c2dba57cf06b63d62b790e891.tar.gz qemu-9c9f5f311a4b391c2dba57cf06b63d62b790e891.tar.xz qemu-9c9f5f311a4b391c2dba57cf06b63d62b790e891.zip | |
pc-bios/s390-ccw: enable subchannel for IPL I/O devices
IPL should cause the IPL I/O device to become enabled. So when handling
the IPL program, we should set the E (Enable) bit. However, virtio-ccw
does not know whether it's dealing with an IPL device or not. Since
trying to perform I/O on a disabled device doesn't make any sense,
let's just always enable it. At the same time we can remove the
SCSW_FCTL_START_FUNC flag as it is ignored for msch anyway and did
not enable the device as intended.
Reported-by: Farhan Ali <alifm@linux.vnet.ibm.com>
Signed-off-by: Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Sascha Silbe <silbe@linux.vnet.ibm.com>
Signed-off-by: Halil Pasic <pasic@linux.vnet.ibm.com>
[remove superfluous flag]
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'include/trace.h')
0 files changed, 0 insertions, 0 deletions