linux.git/drivers/s390/cio, branch for-next

s390/cio/ioasm: Convert to use flag output macros

2024-11-13T13:31:34+00:00

Use flag output macros in inline asm to allow for better code generation if
the compiler has support for the flag output constraint.

Reviewed-by: Juergen Christ 
Signed-off-by: Heiko Carstens

s390/cio/qdio: Convert to use flag output macros

2024-11-13T13:31:34+00:00

Use flag output macros in inline asm to allow for better code generation if
the compiler has support for the flag output constraint.

Reviewed-by: Juergen Christ 
Signed-off-by: Heiko Carstens

s390/cio: Externalize full CMG characteristics

2024-11-13T13:31:31+00:00

The current "measurement_chars" CHPID sysfs attribute exposes only a
limited, validity-filtered portion of data from the associated Channel-
Measurements Characteristics Block (CMCB). New machine models add data
that is relevant for userspace tooling to the "header"-portion of the
CMCB. This data that is not currently accessible to userspace.

To prevent having to add new sysfs attributes whenever a new bit of data
is added to the CMCB "header", add a new sysfs attribute named
"measurement_chars_full" that exposes the full, unfiltered CMCB.

Signed-off-by: Peter Oberparleiter 
Reviewed-by: Vineeth Vijayan 
Signed-off-by: Heiko Carstens

s390/cio/scm: Switch over to sysfs_emit()

2024-10-25T14:03:25+00:00

Per Documentation/filesystems/sysfs.rst, sysfs_emit() is preferred for
presenting attributes to user space in sysfs. Convert the left-over uses
in the cio/scm code.

Signed-off-by: Mete Durlu 
Acked-by: Vineeth Vijayan 
Reviewed-by: Heiko Carstens 
Signed-off-by: Heiko Carstens

s390/cio/css: Switch over to sysfs_emit()

2024-10-25T14:03:25+00:00

Per Documentation/filesystems/sysfs.rst, sysfs_emit() is preferred for
presenting attributes to user space in sysfs. Convert the left-over uses
in the cio/css code.

Signed-off-by: Mete Durlu 
Acked-by: Vineeth Vijayan 
Tested-by: Vineeth Vijayan 
Reviewed-by: Heiko Carstens 
Signed-off-by: Heiko Carstens

s390/cio/ccwgroup: Switch over to sysfs_emit()

2024-10-25T14:03:25+00:00

Per Documentation/filesystems/sysfs.rst, sysfs_emit() is preferred for
presenting attributes to user space in sysfs. Convert the left-over uses
in the cio/ccwgroup code.

Signed-off-by: Mete Durlu 
Acked-by: Vineeth Vijayan 
Tested-by: Vineeth Vijayan 
Reviewed-by: Heiko Carstens 
Signed-off-by: Heiko Carstens

s390/cio/cmf: Switch over to sysfs_emit()

2024-10-25T14:03:25+00:00

Per Documentation/filesystems/sysfs.rst, sysfs_emit() is preferred for
presenting attributes to user space in sysfs. Convert the left-over uses
in the cio/cmf code.

Signed-off-by: Mete Durlu 
Reviewed-by: Heiko Carstens 
Signed-off-by: Heiko Carstens

s390/cio/device: Switch over to sysfs_emit()

2024-10-25T14:03:25+00:00

Per Documentation/filesystems/sysfs.rst, sysfs_emit() is preferred for
presenting attributes to user space in sysfs. Convert the left-over uses
in the cio/device code.

Signed-off-by: Mete Durlu 
Acked-by: Vineeth Vijayan 
Tested-by: Vineeth Vijayan 
Reviewed-by: Heiko Carstens 
Signed-off-by: Heiko Carstens

s390/cio/chp: Switch over to sysfs_emit()

2024-10-25T14:03:24+00:00

Per Documentation/filesystems/sysfs.rst, sysfs_emit() is preferred for
presenting attributes to user space in sysfs. Convert the left-over uses
in the cio/chp code.

Signed-off-by: Mete Durlu 
Tested-by: Vineeth Vijayan 
Acked-by: Vineeth Vijayan 
Reviewed-by: Heiko Carstens 
Signed-off-by: Heiko Carstens

s390/cio: Do not unregister the subchannel based on DNV

2024-10-25T14:03:23+00:00

Starting with commit 2297791c92d0 ("s390/cio: dont unregister
subchannel from child-drivers"), CIO does not unregister subchannels
when the attached device is invalid or unavailable. Instead, it
allows subchannels to exist without a connected device. However, if
the DNV value is 0, such as, when all the CHPIDs of a subchannel are
configured in standby state, the subchannel is unregistered, which
contradicts the current subchannel specification.

Update the logic so that subchannels are not unregistered based
on the DNV value. Also update the SCHIB information even if the
DNV bit is zero.

Suggested-by: Peter Oberparleiter 
Signed-off-by: Vineeth Vijayan 
Fixes: 2297791c92d0 ("s390/cio: dont unregister subchannel from child-drivers")
Reviewed-by: Peter Oberparleiter 
Signed-off-by: Heiko Carstens