BMC/Intel-BMC/linux.git/drivers/s390/cio, branch dev-4.6

s390: Use pr_warn instead of pr_warning

2016-03-07T12:12:04+00:00

Convert the uses of pr_warning to pr_warn so there are fewer uses of the old pr_warning. Miscellanea: o Align arguments o Coalesce formats Signed-off-by: Joe Perches Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

s390/cio: update measurement characteristics

2016-01-26T11:47:51+00:00

Per channel path measurement characteristics are obtained during channel path registration. However if some properties of a channel path change we don't update the measurement characteristics. Make sure to update the characteristics when we change the properties of a channel path or receive a notification from FW about such a change. Signed-off-by: Sebastian Ott Reviewed-by: Peter Oberparleiter Signed-off-by: Martin Schwidefsky

s390/cio: ensure consistent measurement state

2016-01-26T11:47:41+00:00

Make sure that in all cases where we could not obtain measurement characteristics the associated fields are set to invalid values. Note: without this change the "shared" capability of a channel path for which we could not obtain the measurement characteristics was incorrectly displayed as 0 (not shared). We will now correctly report "unknown" in this case. Signed-off-by: Sebastian Ott Reviewed-by: Peter Oberparleiter Signed-off-by: Martin Schwidefsky

s390/cio: fix measurement characteristics memleak

2016-01-26T11:47:23+00:00

Measurement characteristics are allocated during channel path registration but not freed during deregistration. Fix this by embedding these characteristics inside struct channel_path. Signed-off-by: Sebastian Ott Reviewed-by: Peter Oberparleiter Signed-off-by: Martin Schwidefsky

s390/cio: Change I/O instructions from inline to normal functions

2015-12-18T13:59:37+00:00

Adding tracepoints to inline functions adds tracepoint invocation code for each instance where the function is inlined. The resulting increase in kernel code size can have negative impact: - More cache misses in instruction cache - Reduced amount of DMA-capable memory Therefore change all functions implementing I/O instructions from inline to normal functions. Bloat-o-meter summary after change (using performance_defconfig): add/remove: 24/2 grow/shrink: 4/39 up/down: 2205/-4858 (-2653) Signed-off-by: Peter Oberparleiter Acked-by: Cornelia Huck Signed-off-by: Martin Schwidefsky

s390/cio: Introduce common I/O layer tracepoints

2015-12-18T13:59:36+00:00

Add tracepoints to interrupt handler and core inline assemblies used by the s390 common I/O layer. These tracepoints can be used to monitor and validate hardware and hypervisor requests and responses. Signed-off-by: Peter Oberparleiter Reviewed-by: Sebastian Ott Reviewed-by: Cornelia Huck Signed-off-by: Martin Schwidefsky

s390/cio: Consolidate inline assemblies and related data definitions

2015-12-18T13:59:34+00:00

Replace the current semi-arbitrary distribution of inline assemblies: - Inline assemblies used by CIO go into ioasm.h - Data definitions used by inline assemblies go into cio.h Beyond cleaning up the current structure this is also required for use of tracepoints in inline assemblies introduced by a follow-on patch. Signed-off-by: Peter Oberparleiter Acked-by: Sebastian Ott Acked-by: Cornelia Huck Signed-off-by: Martin Schwidefsky

s390/cio: Fix incorrect xsch opcode specification

2015-12-18T13:59:34+00:00

The numeric representation of the xsch instruction was incorrectly specified, resulting in reserved fields of the instruction opcode potentially being set to a non-zero value. While this doesn't currently cause any problem, a future architecture might make use of these fields so that the current specification could result in an exception or unwanted side-effects. Fix this by using the xsch instruction code for which support in binutils was added in 2003. Signed-off-by: Peter Oberparleiter Signed-off-by: Martin Schwidefsky

s390/cio: Remove unused inline assemblies

2015-12-18T13:59:33+00:00

There is no longer a need to maintain two versions of the same inline assembly - one with exception handling, and one without - so get rid of the duplicates and adjust names accordingly. This applies to stsch_err and msch_err which are now renamed to stsch and msch respectively, while the original msch function is removed. Signed-off-by: Peter Oberparleiter Acked-by: Cornelia Huck Signed-off-by: Martin Schwidefsky

s390: Delete unnecessary checks before the function call "debug_unregister"

2015-11-27T08:24:16+00:00

The debug_unregister() function performs also input parameter validation. Thus the test around the calls is not needed. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky