Pull virtio updates from Michael Tsirkin:

 - vdpa/mlx5: support for resumable vqs

 - virtio_scsi: mq_poll support

 - 3virtio_pmem: support SHMEM_REGION

 - virtio_balloon: stay awake while adjusting balloon

 - virtio: support for no-reset virtio PCI PM

 - Fixes, cleanups

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  vdpa/mlx5: Add mkey leak detection
  vdpa/mlx5: Introduce reference counting to mrs
  vdpa/mlx5: Use vq suspend/resume during .set_map
  vdpa/mlx5: Mark vq state for modification in hw vq
  vdpa/mlx5: Mark vq addrs for modification in hw vq
  vdpa/mlx5: Introduce per vq and device resume
  vdpa/mlx5: Allow modifying multiple vq fields in one modify command
  vdpa/mlx5: Expose resumable vq capability
  vdpa: Block vq property changes in DRIVER_OK
  vdpa: Track device suspended state
  scsi: virtio_scsi: Add mq_poll support
  virtio_pmem: support feature SHMEM_REGION
  virtio_balloon: stay awake while adjusting balloon
  vdpa: Remove usage of the deprecated ida_simple_xx() API
  virtio: Add support for no-reset virtio PCI PM
  virtio_net: fix missing dma unmap for resize
  vhost-vdpa: account iommu allocations
  vdpa: Fix an error handling path in eni_vdpa_probe()

Pull libnvdimm updates from Ira Weiny:
 "A mix of bug fixes and updates to interfaces used by nvdimm:

   - Updates to interfaces include:
        Use the new scope based management
        Remove deprecated ida interfaces
        Update to sysfs_emit()

   - Fixup kdoc comments"

* tag 'libnvdimm-for-6.8' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  acpi/nfit: Use sysfs_emit() for all attributes
  nvdimm/namespace: fix kernel-doc for function params
  nvdimm/dimm_devs: fix kernel-doc for function params
  nvdimm/btt: fix btt_blk_cleanup() kernel-doc
  nvdimm-btt: simplify code with the scope based resource management
  nvdimm: Remove usage of the deprecated ida_simple_xx() API
  ACPI: NFIT: Use cleanup.h helpers instead of devm_*()

This patch adds the support for feature VIRTIO_PMEM_F_SHMEM_REGION
(virtio spec v1.2 section 5.19.5.2 [1]).

During feature negotiation, if VIRTIO_PMEM_F_SHMEM_REGION is offered
by the device, the driver looks for a shared memory region of id 0.
If it is found, this feature is understood. Otherwise, this feature
bit is cleared.

During probe, if VIRTIO_PMEM_F_SHMEM_REGION has been negotiated,
virtio pmem ignores the `start` and `size` fields in device config
and uses the physical address range of shared memory region 0.

[1] https://docs.oasis-open.org/virtio/virtio/v1.2/csd01/virtio-v1.2-csd01.html#x1-6480002

Signed-off-by: Changyuan Lyu <changyuanl@google.com>
Message-Id: <20231220204906.566922-1-changyuanl@google.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>

Adjust kernel-doc notation to prevent warnings when using -Wall.

namespace_devs.c:76: warning: No description found for return value of 'nd_is_uuid_unique'
namespace_devs.c:343: warning: No description found for return value of 'shrink_dpa_allocation'
namespace_devs.c:668: warning: No description found for return value of 'grow_dpa_allocation'
namespace_devs.c:958: warning: No description found for return value of 'namespace_update_uuid'
namespace_devs.c:1665: warning: Function parameter or member 'nd_mapping' not described in 'create_namespace_pmem'
namespace_devs.c:1665: warning: Excess function parameter 'nspm' description in 'create_namespace_pmem'
namespace_devs.c:1665: warning: No description found for return value of 'create_namespace_pmem'

[iweiny: s/-errno/ERR_PTR(-errno)/]

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: Ira Weiny <ira.weiny@intel.com>
Cc:  <nvdimm@lists.linux.dev>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Link: https://lore.kernel.org/r/20231207210545.24056-3-rdunlap@infradead.org
Signed-off-by: Ira Weiny <ira.weiny@intel.com>

Adjust kernel-doc notation to prevent warnings when using -Wall.

dimm_devs.c:59: warning: Function parameter or member 'ndd' not described in 'nvdimm_init_nsarea'
dimm_devs.c:59: warning: Excess function parameter 'nvdimm' description in 'nvdimm_init_nsarea'
dimm_devs.c:59: warning: No description found for return value of 'nvdimm_init_nsarea'
dimm_devs.c:728: warning: No description found for return value of 'nd_pmem_max_contiguous_dpa'
dimm_devs.c:773: warning: No description found for return value of 'nd_pmem_available_dpa'
dimm_devs.c:844: warning: Function parameter or member 'ndd' not described in 'nvdimm_allocated_dpa'
dimm_devs.c:844: warning: Excess function parameter 'nvdimm' description in 'nvdimm_allocated_dpa'
dimm_devs.c:844: warning: No description found for return value of 'nvdimm_allocated_dpa'

[iweiny: drop ND_CMD_* status code]

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: Ira Weiny <ira.weiny@intel.com>
Cc:  <nvdimm@lists.linux.dev>
Link: https://lore.kernel.org/r/20231207210545.24056-2-rdunlap@infradead.org
Signed-off-by: Ira Weiny <ira.weiny@intel.com>

Correct the function parameters to prevent kernel-doc warnings:

btt.c:1567: warning: Function parameter or member 'nd_region' not described in 'btt_init'
btt.c:1567: warning: Excess function parameter 'maxlane' description in 'btt_init'

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: Ira Weiny <ira.weiny@intel.com>
Cc:  <nvdimm@lists.linux.dev>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Link: https://lore.kernel.org/r/20231207210545.24056-1-rdunlap@infradead.org
Signed-off-by: Ira Weiny <ira.weiny@intel.com>

Use the scope based resource management (defined in
linux/cleanup.h) to automate resource lifetime
control on struct btt_sb *super in discover_arenas().

Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/20231214083919.22218-1-dinghao.liu@zju.edu.cn
Signed-off-by: Ira Weiny <ira.weiny@intel.com>

ida_alloc() and ida_free() should be preferred to the deprecated
ida_simple_get() and ida_simple_remove().

This is less verbose.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/50719568e4108f65f3b989ba05c1563e17afba3f.1702228319.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Ira Weiny <ira.weiny@intel.com>

Found with grep.

strncpy() is deprecated for use on NUL-terminated destination strings
[1] and as such we should prefer more robust and less ambiguous string
interfaces.

We expect super->signature to be NUL-terminated based on its usage with
memcmp against a NUL-term'd buffer:
btt_devs.c:
253 | if (memcmp(super->signature, BTT_SIG, BTT_SIG_LEN) != 0)
btt.h:
13  | #define BTT_SIG "BTT_ARENA_INFO\0"

NUL-padding is not required as `super` is already zero-allocated:
btt.c:
985 | super = kzalloc(sizeof(struct btt_sb), GFP_NOIO);
... rendering any additional NUL-padding superfluous.

Considering the above, a suitable replacement is `strscpy` [2] due to
the fact that it guarantees NUL-termination on the destination buffer
without unnecessarily NUL-padding.

Let's also use the more idiomatic strscpy usage of (dest, src,
sizeof(dest)) instead of (dest, src, XYZ_LEN) for buffers that the
compiler can determine the size of. This more tightly correlates the
destination buffer to the amount of bytes copied.

Side note, this pattern of memcmp() on two NUL-terminated strings should
really be changed to just a strncmp(), if i'm not mistaken? I see
multiple instances of this pattern in this system:

|       if (memcmp(super->signature, BTT_SIG, BTT_SIG_LEN) != 0)
|               return false;

where BIT_SIG is defined (weirdly) as a double NUL-terminated string:

|       #define BTT_SIG "BTT_ARENA_INFO\0"

Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#strncpy-on-nul-terminated-strings [1]
Link: https://manpages.debian.org/testing/linux-manual-4.8/strscpy.9.en.html [2]
Link: https://github.com/KSPP/linux/issues/90
Cc: linux-hardening@vger.kernel.org
Signed-off-by: Justin Stitt <justinstitt@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20231019-strncpy-drivers-nvdimm-btt-c-v2-1-366993878cf0@google.com
Signed-off-by: Kees Cook <keescook@chromium.org>

Remove kernel-doc warnings:

drivers/nvdimm/badrange.c:271: warning: Function parameter or member
'nd_region' not described in 'nvdimm_badblocks_populate'
drivers/nvdimm/badrange.c:271: warning: Function parameter or member
'range' not described in 'nvdimm_badblocks_populate'
drivers/nvdimm/badrange.c:271: warning: Excess function parameter 'region'
description in 'nvdimm_badblocks_populate'
drivers/nvdimm/badrange.c:271: warning: Excess function parameter 'res'
description in 'nvdimm_badblocks_populate'

Signed-off-by: Zhu Wang <wangzhu9@huawei.com>
Link: https://lore.kernel.org/r/20230731112942.215135-1-wangzhu9@huawei.com
Tested-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>