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| author | Eric Farman <farman@linux.ibm.com> | 2019-04-18 21:26:15 +0300 |
|---|---|---|
| committer | Heiko Carstens <hca@linux.ibm.com> | 2023-01-09 16:34:07 +0300 |
| commit | 155a4321c117e29d174893127ae84cd84cacf0f3 (patch) | |
| tree | c556e03f564e0e0d2986c001e1aa089af91b61e6 /drivers/s390/cio | |
| parent | 9fbed59fcd16e60dde2528038cc343abd65c0948 (diff) | |
| download | linux-155a4321c117e29d174893127ae84cd84cacf0f3.tar.xz | |
vfio/ccw: allow non-zero storage keys
Currently, vfio-ccw copies the ORB from the io_region to the
channel_program struct being built. It then adjusts various
pieces of that ORB to the values needed to be used by the
SSCH issued by vfio-ccw in the host.
This includes setting the subchannel key to the default,
presumably because Linux doesn't do anything with non-zero
storage keys itself. But it seems wrong to convert every I/O
to the default key if the guest itself requested a non-zero
subchannel (access) key.
Any channel program that sets a non-zero key would expect the
same key returned in the SCSW of the IRB, not zero, so best to
allow that to occur unimpeded.
Signed-off-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'drivers/s390/cio')
| -rw-r--r-- | drivers/s390/cio/vfio_ccw_cp.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/s390/cio/vfio_ccw_cp.c b/drivers/s390/cio/vfio_ccw_cp.c index a0060ef1119e..268a90252521 100644 --- a/drivers/s390/cio/vfio_ccw_cp.c +++ b/drivers/s390/cio/vfio_ccw_cp.c @@ -836,7 +836,6 @@ union orb *cp_get_orb(struct channel_program *cp, struct subchannel *sch) orb->cmd.intparm = (u32)virt_to_phys(sch); orb->cmd.fmt = 1; - orb->cmd.key = PAGE_DEFAULT_KEY >> 4; if (orb->cmd.lpm == 0) orb->cmd.lpm = sch->lpm; |