linux.git/drivers/s390, branch v5.2-rc2

dax: Arrange for dax_supported check to span multiple devices

2019-05-20T22:02:08+00:00

Pankaj reports that starting with commit ad428cdb525a "dax: Check the
end of the block-device capacity with dax_direct_access()" device-mapper
no longer allows dax operation. This results from the stricter checks in
__bdev_dax_supported() that validate that the start and end of a
block-device map to the same 'pagemap' instance.

Teach the dax-core and device-mapper to validate the 'pagemap' on a
per-target basis. This is accomplished by refactoring the
bdev_dax_supported() internals into generic_fsdax_supported() which
takes a sector range to validate. Consequently generic_fsdax_supported()
is suitable to be used in a device-mapper ->iterate_devices() callback.
A new ->dax_supported() operation is added to allow composite devices to
split and route upper-level bdev_dax_supported() requests.

Fixes: ad428cdb525a ("dax: Check the end of the block-device...")
Cc: 
Cc: Ira Weiny 
Cc: Dave Jiang 
Cc: Keith Busch 
Cc: Matthew Wilcox 
Cc: Vishal Verma 
Cc: Heiko Carstens 
Cc: Martin Schwidefsky 
Reviewed-by: Jan Kara 
Reported-by: Pankaj Gupta 
Reviewed-by: Pankaj Gupta 
Tested-by: Pankaj Gupta 
Tested-by: Vaibhav Jain 
Reviewed-by: Mike Snitzer 
Signed-off-by: Dan Williams

Merge tag 's390-5.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

2019-05-17T17:08:59+00:00

Pull more s390 updates from Martin Schwidefsky:

 - Enhancements for the QDIO layer

 - Remove the RCP trace event

 - Avoid three build issues

 - Move the defconfig to the configs directory

* tag 's390-5.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390: move arch/s390/defconfig to arch/s390/configs/defconfig
  s390/qdio: optimize state inspection of HW-owned SBALs
  s390/qdio: use get_buf_state() in debug_get_buf_state()
  s390/qdio: allow to scan all Output SBALs in one go
  s390/cio: Remove tracing for rchp instruction
  s390/kasan: adapt disabled_wait usage to avoid build error
  latent_entropy: avoid build error when plugin cflags are not set
  s390/boot: fix compiler error due to missing awk strtonum

Merge tag 'for-5.2/block-post-20190516' of git://git.kernel.dk/linux-block

2019-05-17T02:08:15+00:00

Pull more block updates from Jens Axboe:
 "This is mainly some late lightnvm changes that came in just before the
  merge window, as well as fixes that have been queued up since the
  initial pull request was frozen.

  This contains:

   - lightnvm changes, fixing race conditions, improving memory
     utilization, and improving pblk compatability (Chansol, Igor,
     Marcin)

   - NVMe pull request with minor fixes all over the map (via Christoph)

   - remove redundant error print in sata_rcar (Geert)

   - struct_size() cleanup (Jackie)

   - dasd CONFIG_LBADF warning fix (Ming)

   - brd cond_resched() improvement (Mikulas)"

* tag 'for-5.2/block-post-20190516' of git://git.kernel.dk/linux-block: (41 commits)
  block/bio-integrity: use struct_size() in kmalloc()
  nvme: validate cntlid during controller initialisation
  nvme: change locking for the per-subsystem controller list
  nvme: trace all async notice events
  nvme: fix typos in nvme status code values
  nvme-fabrics: remove unused argument
  nvme-multipath: avoid crash on invalid subsystem cntlid enumeration
  nvme-fc: use separate work queue to avoid warning
  nvme-rdma: remove redundant reference between ib_device and tagset
  nvme-pci: mark expected switch fall-through
  nvme-pci: add known admin effects to augument admin effects log page
  nvme-pci: init shadow doorbell after each reset
  brd: add cond_resched to brd_free_pages
  sata_rcar: Remove ata_host_alloc() error printing
  s390/dasd: fix build warning in dasd_eckd_build_cp_raw
  lightnvm: pblk: use nvm_rq_to_ppa_list()
  lightnvm: pblk: simplify partial read path
  lightnvm: do not remove instance under global lock
  lightnvm: track inflight target creations
  lightnvm: pblk: recover only written metadata
  ...

Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

2019-05-14T21:12:59+00:00

Pull virtio updates from Michael Tsirkin:

 - enable packed ring support for s390

 - several fixes

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  virtio/s390: enable packed ring
  virtio/s390: DMA support for virtio-ccw
  virtio/s390: use vring_create_virtqueue
  virtio/virtio_ring: do some comment fixes
  vhost-scsi: remove incorrect memory barrier
  tools/virtio/ringtest: Remove bogus definition of BUG_ON()
  virtio_ring: Fix potential mem leak in virtqueue_add_indirect_packed

virtio/s390: enable packed ring

2019-05-12T17:11:36+00:00

Nothing precludes to accepting  VIRTIO_F_RING_PACKED any more.

Signed-off-by: Halil Pasic 
Signed-off-by: Michael S. Tsirkin 
Reviewed-by: Cornelia Huck

virtio/s390: DMA support for virtio-ccw

2019-05-12T17:11:36+00:00

Currently virtio-ccw devices do not work if the device has
VIRTIO_F_IOMMU_PLATFORM. In future we do want to support DMA API with
virtio-ccw.

Let us do the plumbing, so the feature VIRTIO_F_IOMMU_PLATFORM works
with virtio-ccw.

Let us also switch from legacy avail/used accessors to the DMA aware
ones (even if it isn't strictly necessary), and remove the legacy
accessors (we were the last users).

Signed-off-by: Halil Pasic 
Signed-off-by: Michael S. Tsirkin 
Reviewed-by: Cornelia Huck

virtio/s390: use vring_create_virtqueue

2019-05-12T17:11:36+00:00

The commit 2a2d1382fe9d ("virtio: Add improved queue allocation API")
establishes a new way of allocating virtqueues (as a part of the effort
that taught DMA to virtio rings).

In the future we will want virtio-ccw to use the DMA API as well.

Let us switch from the legacy method of allocating virtqueues to
vring_create_virtqueue() as the first step into that direction.

Signed-off-by: Halil Pasic 
Signed-off-by: Michael S. Tsirkin 
Reviewed-by: Cornelia Huck

s390/dasd: fix build warning in dasd_eckd_build_cp_raw

2019-05-09T14:10:21+00:00

Commit 72deb455b5ec619f ("block: remove CONFIG_LBDAF") changes
sector_t to u64 unconditionaly, so apply '%llu' for print
sector_t variable.

Fixes: 72deb455b5ec619f ("block: remove CONFIG_LBDAF")
Cc: linux-s390@vger.kernel.org
Reviewed-by: Christoph Hellwig 
Signed-off-by: Ming Lei 
Signed-off-by: Jens Axboe

s390/qdio: optimize state inspection of HW-owned SBALs

2019-05-08T13:01:23+00:00

When get_buf_states() gets called with count > 1, it scans the
corresponding number of SBAL states until it encounters a mismatch.

But when these SBALs are in a HW-owned state, the callers don't actually
care _how many_ such SBALs are on the queue. If we can't process the
first SBAL, we can't process any of the following SBALs either. So when
the first SBAL is HW-owned, skip the scan of the remaining SBALs and
thus save some CPU time.

Signed-off-by: Julian Wiedmann 
Reviewed-by: Jens Remus 
Signed-off-by: Martin Schwidefsky

s390/qdio: use get_buf_state() in debug_get_buf_state()

2019-05-08T13:01:23+00:00

For a 1-SBAL state inspection, use the corresponding helper.
No functional change, just reducing the number of immediate callers to
get_buf_states().

Signed-off-by: Julian Wiedmann 
Reviewed-by: Jens Remus 
Signed-off-by: Martin Schwidefsky