This patch extends the vhost-vdpa to support ASID based IOTLB API. The
vhost-vdpa device will allocated multiple IOTLBs for vDPA device that
supports multiple address spaces. The IOTLBs and vDPA device memory
mappings is determined and maintained through ASID.

Note that we still don't support vDPA device with more than one
address spaces that depends on platform IOMMU. This work will be done
by moving the IOMMU logic from vhost-vDPA to vDPA device driver.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Gautam Dawar <gdawar@xilinx.com>
Message-Id: <20220330180436.24644-16-gdawar@xilinx.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

Includes fixup:

vhost-vdpa: Fix some error handling path in vhost_vdpa_process_iotlb_msg()

In the error paths introduced by the original patch, a mutex may be left locked.
Add the correct goto instead of a direct return.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Message-Id: <89ef0ae4c26ac3cfa440c71e97e392dcb328ac1b.1653227924.git.christophe.jaillet@wanadoo.fr>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

Follows the vDPA support for associating ASID to a specific virtqueue
group. This patch adds a uAPI to support setting them from userspace.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Gautam Dawar <gdawar@xilinx.com>
Message-Id: <20220330180436.24644-15-gdawar@xilinx.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

Follows the support for virtqueue group in vDPA. This patches
introduces uAPI to get the virtqueue group ID for a specific virtqueue
in vhost-vdpa.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Gautam Dawar <gdawar@xilinx.com>
Message-Id: <20220330180436.24644-14-gdawar@xilinx.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

This patch introduces the uAPI for getting the number of address
spaces supported by this vDPA device.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Gautam Dawar <gdawar@xilinx.com>
Message-Id: <20220330180436.24644-13-gdawar@xilinx.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

Follows the vDPA support for multiple address spaces, this patch
introduce uAPI for the userspace to know the number of virtqueue
groups supported by the vDPA device.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Gautam Dawar <gdawar@xilinx.com>
Message-Id: <20220330180436.24644-12-gdawar@xilinx.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

This patch converts the vhost-vDPA device to support multiple IOTLBs
tagged via ASID via hlist. This will be used for supporting multiple
address spaces in the following patches.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Gautam Dawar <gdawar@xilinx.com>
Message-Id: <20220330180436.24644-11-gdawar@xilinx.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

This patches allows userspace to send ASID based IOTLB message to
vhost. This idea is to use the reserved u32 field in the existing V2
IOTLB message. Vhost device should advertise this capability via
VHOST_BACKEND_F_IOTLB_ASID backend feature.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Gautam Dawar <gdawar@xilinx.com>
Message-Id: <20220330180436.24644-10-gdawar@xilinx.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

This patch splits out IOTLB initialization to make sure it could be
reused by external modules.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Gautam Dawar <gdawar@xilinx.com>
Message-Id: <20220330180436.24644-9-gdawar@xilinx.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

This patch introduces a new bus operation to allow the vDPA bus driver
to associate an ASID to a virtqueue group.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Gautam Dawar <gdawar@xilinx.com>
Message-Id: <20220330180436.24644-8-gdawar@xilinx.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

This patches introduces the multiple address spaces support for vDPA
device. This idea is to identify a specific address space via an
dedicated identifier - ASID.

During vDPA device allocation, vDPA device driver needs to report the
number of address spaces supported by the device then the DMA mapping
ops of the vDPA device needs to be extended to support ASID.

This helps to isolate the environments for the virtqueue that will not
be assigned directly. E.g in the case of virtio-net, the control
virtqueue will not be assigned directly to guest.

As a start, simply claim 1 virtqueue groups and 1 address spaces for
all vDPA devices. And vhost-vDPA will simply reject the device with
more than 1 virtqueue groups or address spaces.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Gautam Dawar <gdawar@xilinx.com>
Message-Id: <20220330180436.24644-7-gdawar@xilinx.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

This patch introduces virtqueue groups to vDPA device. The virtqueue
group is the minimal set of virtqueues that must share an address
space. And the address space identifier could only be attached to
a specific virtqueue group.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Gautam Dawar <gdawar@xilinx.com>
Message-Id: <20220330180436.24644-6-gdawar@xilinx.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

To ease the implementation of per group ASID support for vDPA
device. This patch switches to use a vhost-vdpa specific IOTLB to
avoid the unnecessary refactoring of the vhost core.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Gautam Dawar <gdawar@xilinx.com>
Message-Id: <20220330180436.24644-5-gdawar@xilinx.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

To prepare for the ASID support for vhost-vdpa, try to pass IOTLB
object to dma helpers. No functional changes, it's just a preparation
for support multiple IOTLBs.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Gautam Dawar <gdawar@xilinx.com>
Message-Id: <20220330180436.24644-4-gdawar@xilinx.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

There's no need for setting callbacks for the driver that doesn't care
about that.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Gautam Dawar <gdawar@xilinx.com>
Message-Id: <20220330180436.24644-3-gdawar@xilinx.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

We should store feature bits in vhost_types.h as what has been done
for e.g VHOST_F_LOG_ALL.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Gautam Dawar <gdawar@xilinx.com>
Message-Id: <20220330180436.24644-2-gdawar@xilinx.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

The 'if (vq->vq.num_free < descs_used)' check will almost always be false.
Signed-off-by: Xianting Tian <xianting.tian@linux.alibaba.com>
Message-Id: <20220328105817.1028065-2-xianting.tian@linux.alibaba.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>

It passes '_vq' to virtqueue_use_indirect(), which still calls
to_vvq to get 'vq', let's directly pass 'vq'. It can avoid
unnecessary call of to_vvq in hot path.
Signed-off-by: Xianting Tian <xianting.tian@linux.alibaba.com>
Message-Id: <20220328105817.1028065-1-xianting.tian@linux.alibaba.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>

This patch supports mq_ops->queue_rqs() hook. It has an advantage of
batch submission to virtio-blk driver. It also helps polling I/O because
polling uses batched completion of block layer. Batch submission in
queue_rqs() can boost polling performance.

In queue_rqs(), it iterates plug->mq_list, collects requests that
belong to same HW queue until it encounters a request from other
HW queue or sees the end of the list.
Then, virtio-blk adds requests into virtqueue and kicks virtqueue
to submit requests.

If there is an error, it inserts error request to requeue_list and
passes it to ordinary block layer path.

For verification, I did fio test.
(io_uring, randread, direct=1, bs=4K, iodepth=64 numjobs=N)
I set 4 vcpu and 2 virtio-blk queues for VM and run fio test 5 times.
It shows about 2% improvement.

                                 |   numjobs=2   |   numjobs=4
      -----------------------------------------------------------
        fio without queue_rqs()  |   291K IOPS   |   238K IOPS
      -----------------------------------------------------------
        fio with queue_rqs()     |   295K IOPS   |   243K IOPS

For polling I/O performance, I also did fio test as below.
(io_uring, hipri, randread, direct=1, bs=512, iodepth=64 numjobs=4)
I set 4 vcpu and 2 poll queues for VM.
It shows about 2% improvement in polling I/O.

                                      |   IOPS   |  avg latency
      -----------------------------------------------------------
        fio poll without queue_rqs()  |   424K   |   613.05 usec
      -----------------------------------------------------------
        fio poll with queue_rqs()     |   435K   |   601.01 usec
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Suwan Kim <suwan.kim027@gmail.com>
Message-Id: <20220406153207.163134-3-suwan.kim027@gmail.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>

This patch supports polling I/O via virtio-blk driver. Polling
feature is enabled by module parameter "poll_queues" and it sets
dedicated polling queues for virtio-blk. This patch improves the
polling I/O throughput and latency.

The virtio-blk driver doesn't not have a poll function and a poll
queue and it has been operating in interrupt driven method even if
the polling function is called in the upper layer.

virtio-blk polling is implemented upon 'batched completion' of block
layer. virtblk_poll() queues completed request to io_comp_batch->req_list
and later, virtblk_complete_batch() calls unmap function and ends
the requests in batch.

virtio-blk reads the number of poll queues from module parameter
"poll_queues". If VM sets queue parameter as below,
("num-queues=N" [QEMU property], "poll_queues=M" [module parameter])
It allocates N virtqueues to virtio_blk->vqs[N] and it uses [0..(N-M-1)]
as default queues and [(N-M)..(N-1)] as poll queues. Unlike the default
queues, the poll queues have no callback function.

Regarding HW-SW queue mapping, the default queue mapping uses the
existing method that condsiders MSI irq vector. But the poll queue
doesn't have an irq, so it uses the regular blk-mq cpu mapping.

For verifying the improvement, I did Fio polling I/O performance test
with io_uring engine with the options below.
(io_uring, hipri, randread, direct=1, bs=512, iodepth=64 numjobs=N)
I set 4 vcpu and 4 virtio-blk queues - 2 default queues and 2 poll
queues for VM.

As a result, IOPS and average latency improved about 10%.

Test result:

- Fio io_uring poll without virtio-blk poll support
	-- numjobs=1 : IOPS = 339K, avg latency = 188.33us
	-- numjobs=2 : IOPS = 367K, avg latency = 347.33us
	-- numjobs=4 : IOPS = 383K, avg latency = 682.06us

- Fio io_uring poll with virtio-blk poll support
	-- numjobs=1 : IOPS = 385K, avg latency = 165.94us
	-- numjobs=2 : IOPS = 408K, avg latency = 313.28us
	-- numjobs=4 : IOPS = 424K, avg latency = 613.05us
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Signed-off-by: Suwan Kim <suwan.kim027@gmail.com>
Message-Id: <20220406153207.163134-2-suwan.kim027@gmail.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>

Reading statistics could be done intensively and by several processes
concurrently. Reader's lock is sufficient in this case.

Change reslock from mutex to a rwsem.
Suggested-by: Si-Wei Liu <si-wei.liu@oracle.com>
Signed-off-by: Eli Cohen <elic@nvidia.com>
Message-Id: <20220518133804.1075129-7-elic@nvidia.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

Implement the get_vq_stats calback of vdpa_config_ops to return the
statistics for a virtqueue.

The statistics are provided as vendor specific statistics where the
driver provides a pair of attribute name and attribute value.

Currently supported are received descriptors and completed descriptors.
Signed-off-by: Eli Cohen <elic@nvidia.com>
Message-Id: <20220518133804.1075129-6-elic@nvidia.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

Replace cf_mutex with rw_semaphore to reflect the fact that some calls
could be called concurrently but can suffice with read lock.
Suggested-by: Si-Wei Liu <si-wei.liu@oracle.com>
Signed-off-by: Eli Cohen <elic@nvidia.com>
Message-Id: <20220518133804.1075129-5-elic@nvidia.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

Use rw_semaphore instead of mutex to control access to vdpa devices.
This can be especially beneficial in case processes poll on statistics
information.
Suggested-by: Si-Wei Liu <si-wei.liu@oracle.com>
Reviewed-by: Si-Wei Liu <si-wei.liu@oracle.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Eli Cohen <elic@nvidia.com>
Message-Id: <20220518133804.1075129-4-elic@nvidia.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

Allows to read vendor statistics of a vdpa device. The specific
statistics data are received from the upstream driver in the form of an
(attribute name, attribute value) pairs.

An example of statistics for mlx5_vdpa device are:

received_desc - number of descriptors received by the virtqueue
completed_desc - number of descriptors completed by the virtqueue

A descriptor using indirect buffers is still counted as 1. In addition,
N chained descriptors are counted correctly N times as one would expect.

A new callback was added to vdpa_config_ops which provides the means for
the vdpa driver to return statistics results.

The interface allows for reading all the supported virtqueues, including
the control virtqueue if it exists.

Below are some examples taken from mlx5_vdpa which are introduced in the
following patch:

1. Read statistics for the virtqueue at index 1

$ vdpa dev vstats show vdpa-a qidx 1
vdpa-a:
queue_type tx queue_index 1 received_desc 3844836 completed_desc 3844836

2. Read statistics for the virtqueue at index 32
$ vdpa dev vstats show vdpa-a qidx 32
vdpa-a:
queue_type control_vq queue_index 32 received_desc 62 completed_desc 62

3. Read statisitics for the virtqueue at index 0 with json output
$ vdpa -j dev vstats show vdpa-a qidx 0
{"vstats":{"vdpa-a":{
"queue_type":"rx","queue_index":0,"name":"received_desc","value":417776,\
 "name":"completed_desc","value":417548}}}

4. Read statistics for the virtqueue at index 0 with preety json output
$ vdpa -jp dev vstats show vdpa-a qidx 0
{
    "vstats": {
        "vdpa-a": {

            "queue_type": "rx",
            "queue_index": 0,
            "name": "received_desc",
            "value": 417776,
            "name": "completed_desc",
            "value": 417548
        }
    }
}
Signed-off-by: Eli Cohen <elic@nvidia.com>
Message-Id: <20220518133804.1075129-3-elic@nvidia.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

In vdpa_nl_cmd_dev_get_doit(), if the call to genlmsg_reply() fails we
must not call nlmsg_free() since this is done inside genlmsg_reply().

Fix it.

Fixes: bc0d90ee ("vdpa: Enable user to query vdpa device info")
Reviewed-by: Si-Wei Liu <si-wei.liu@oracle.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Eli Cohen <elic@nvidia.com>
Message-Id: <20220518133804.1075129-2-elic@nvidia.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

Pull fbdev fixes and updates from Helge Deller:
 "A buch of small fixes and cleanups, including:

   - vesafb: Fix a use-after-free due early fb_info cleanup

   - clcdfb: Fix refcount leak in clcdfb_of_vram_setup

   - hyperv_fb: Allow resolutions with size > 64 MB for Gen1

   - pxa3xx-gcu: release the resources correctly in
     pxa3xx_gcu_probe/remove()

   - omapfb: Prevent compiler warning regarding
     hwa742_update_window_async()"

* tag 'for-5.19/fbdev-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev:
  video: fbdev: omap: Add prototype for hwa742_update_window_async()
  video: fbdev: vesafb: Fix a use-after-free due early fb_info cleanup
  video: fbdev: radeon: Fix spelling typo in comment
  video: fbdev: xen: remove setting of 'transp' parameter
  video: fbdev: pxa3xx-gcu: release the resources correctly in pxa3xx_gcu_probe/remove()
  video: fbdev: omapfb: simplify the return expression of nec_8048_connect()
  video: fbdev: omapfb: simplify the return expression of dsi_init_pll_data()
  video: fbdev: clcdfb: Fix refcount leak in clcdfb_of_vram_setup
  video: fbdev: hyperv_fb: Allow resolutions with size > 64 MB for Gen1

Pull parisc architecture updates from Helge Deller:
 "Minor cleanups and code optimizations, e.g.:

   - improvements in assembly statements in the tmpalias code path

   - added some additionals compile time checks

   - drop some unneccesary assembler DMA syncs"

* tag 'for-5.19/parisc-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Drop __ARCH_WANT_OLD_READDIR and __ARCH_WANT_SYS_OLDUMOUNT
  parisc: Optimize tmpalias function calls
  parisc: Add dep_safe() macro to deposit a register in 32- and 64-kernels
  parisc: Fix wrong comment for shr macro
  parisc: Prevent ldil() to sign-extend into upper 32 bits
  parisc: Don't hardcode assembler bit definitions in tmpalias code
  parisc: Don't enforce DMA completion order in cache flushes
  parisc: video: fbdev: stifb: Add sti_dump_font() to dump STI font

Pull more power management updates from Rafael Wysocki:
 "These update the ARM cpufreq drivers and fix up the CPPC cpufreq
  driver after recent changes, update the OPP code and PM documentation
  and add power sequences support to the system reboot and power off
  code.

  Specifics:

   - Add Tegra234 cpufreq support (Sumit Gupta)

   - Clean up and enhance the Mediatek cpufreq driver (Wan Jiabing,
     Rex-BC Chen, and Jia-Wei Chang)

   - Fix up the CPPC cpufreq driver after recent changes (Zheng Bin,
     Pierre Gondois)

   - Minor update to dt-binding for Qcom's opp-v2-kryo-cpu (Yassine
     Oudjana)

   - Use list iterator only inside the list_for_each_entry loop
     (Xiaomeng Tong, and Jakob Koschel)

   - New APIs related to finding OPP based on interconnect bandwidth
     (Krzysztof Kozlowski)

   - Fix the missing of_node_put() in _bandwidth_supported() (Dan
     Carpenter)

   - Cleanups (Krzysztof Kozlowski, and Viresh Kumar)

   - Add Out of Band mode description to the intel-speed-select utility
     documentation (Srinivas Pandruvada)

   - Add power sequences support to the system reboot and power off code
     and make related platform-specific changes for multiple platforms
     (Dmitry Osipenko, Geert Uytterhoeven)"

* tag 'pm-5.19-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (60 commits)
  cpufreq: CPPC: Fix unused-function warning
  cpufreq: CPPC: Fix build error without CONFIG_ACPI_CPPC_CPUFREQ_FIE
  Documentation: admin-guide: PM: Add Out of Band mode
  kernel/reboot: Change registration order of legacy power-off handler
  m68k: virt: Switch to new sys-off handler API
  kernel/reboot: Add devm_register_restart_handler()
  kernel/reboot: Add devm_register_power_off_handler()
  soc/tegra: pmc: Use sys-off handler API to power off Nexus 7 properly
  reboot: Remove pm_power_off_prepare()
  regulator: pfuze100: Use devm_register_sys_off_handler()
  ACPI: power: Switch to sys-off handler API
  memory: emif: Use kernel_can_power_off()
  mips: Use do_kernel_power_off()
  ia64: Use do_kernel_power_off()
  x86: Use do_kernel_power_off()
  sh: Use do_kernel_power_off()
  m68k: Switch to new sys-off handler API
  powerpc: Use do_kernel_power_off()
  xen/x86: Use do_kernel_power_off()
  parisc: Use do_kernel_power_off()
  ...

Pull additional thermal control update from Rafael Wysocki:
 "Add Meteor Lake PCI device ID to the int340x thermal control driver
  (Sumeet Pawnikar)"

* tag 'thermal-5.19-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  thermal: int340x: Add Meteor Lake PCI device ID

Pull more ACPI updates from Rafael Wysocki:
 "These add some new device IDs, update a few drivers (processor,
  battery, backlight) and clean up code in a few places.

  Specifics:

   - Add Meteor Lake ACPI IDs for DPTF devices (Sumeet Pawnikar)

   - Rearrange find_child_checks() to simplify code (Rafael Wysocki)

   - Use memremap() to map the UCSI mailbox that is always in main
     memory and drop acpi_release_memory() that has no more users
     (Heikki Krogerus, Dan Carpenter)

   - Make max_cstate/nocst/bm_check_disable processor module parameters
     visible in sysfs (Yajun Deng)

   - Fix typo in the CPPC driver (Julia Lawall)

   - Make the ACPI battery driver show the "not-charging" status by
     default unless "charging" or "full" is directly indicated (Werner
     Sembach)

   - Improve the PM notifier in the ACPI backlight driver (Zhang Rui)

   - Clean up some white space in the ACPI code (Ian Cowan)"

* tag 'acpi-5.19-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  usb: typec: ucsi: acpi: fix a NULL vs IS_ERR() check in probe
  ACPI: DPTF: Support Meteor Lake
  ACPI: CPPC: fix typo in comment
  ACPI: video: improve PM notifer callback
  ACPI: clean up white space in a few places for consistency
  ACPI: glue: Rearrange find_child_checks()
  ACPI: processor: idle: Expose max_cstate/nocst/bm_check_disable read-only in sysfs
  ACPI: battery: Make "not-charging" the default on no charging or full info
  ACPI: OSL: Remove the helper for deactivating memory region
  usb: typec: ucsi: acpi: Map the mailbox with memremap()

Pull overlayfs updates from Miklos Szeredi:

 - Support idmapped layers in overlayfs (Christian Brauner)

 - Add a fix to exportfs that is relevant to open_by_handle_at(2) as
   well

 - Introduce new lookup helpers that allow passing mnt_userns into
   inode_permission()

* tag 'ovl-update-5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs:
  ovl: support idmapped layers
  ovl: handle idmappings in ovl_xattr_{g,s}et()
  ovl: handle idmappings in layer open helpers
  ovl: handle idmappings in ovl_permission()
  ovl: use ovl_copy_{real,upper}attr() wrappers
  ovl: store lower path in ovl_inode
  ovl: handle idmappings for layer lookup
  ovl: handle idmappings for layer fileattrs
  ovl: use ovl_path_getxattr() wrapper
  ovl: use ovl_lookup_upper() wrapper
  ovl: use ovl_do_notify_change() wrapper
  ovl: pass layer mnt to ovl_open_realfile()
  ovl: pass ofs to setattr operations
  ovl: handle idmappings in creation operations
  ovl: add ovl_upper_mnt_userns() wrapper
  ovl: pass ofs to creation operations
  ovl: use wrappers to all vfs_*xattr() calls
  exportfs: support idmapped mounts
  fs: add two trivial lookup helpers

Pull MIPS updates from Thomas Bogendoerfer:
 "Cleanups and fixes"

* tag 'mips_5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: (38 commits)
  MIPS: RALINK: Define pci_remap_iospace under CONFIG_PCI_DRIVERS_GENERIC
  MIPS: Use memblock_add_node() in early_parse_mem() under CONFIG_NUMA
  MIPS: Return -EINVAL if mem parameter is empty in early_parse_mem()
  MIPS: Kconfig: Fix indentation and add endif comment
  MIPS: bmips: Fix compiler warning observed on W=1 build
  MIPS: Rewrite `csum_tcpudp_nofold' in plain C
  mips: setup: use strscpy to replace strlcpy
  MIPS: Octeon: add SNIC10E board
  MIPS: Ingenic: Refresh defconfig for CU1000-Neo and CU1830-Neo.
  MIPS: Ingenic: Refresh device tree for Ingenic SoCs and boards.
  MIPS: Ingenic: Add PWM nodes for X1830.
  MIPS: Octeon: fix typo in comment
  MIPS: loongson32: Kconfig: Remove extra space
  MIPS: Sibyte: remove unnecessary return variable
  MIPS: Use NOKPROBE_SYMBOL() instead of __kprobes annotation
  selftests/ftrace: Save kprobe_events to test log
  MIPS: tools: no need to initialise statics to 0
  MIPS: Loongson: Use hwmon_device_register_with_groups() to register hwmon
  MIPS: VR41xx: Drop redundant spinlock initialization
  MIPS: smp: optimization for flush_tlb_mm when exiting
  ...

Pull m68knommu updates from Greg Ungerer:
 "A collection of changes to add elf-fdpic loader support for m68k.

  Also a collection of various fixes. They include typo corrections,
  undefined symbol compilation fixes, removal of the ISA_DMA_API support
  and removal of unused code.

  Summary:

   - correctly set up ZERO_PAGE pointer

   - drop ISA_DMA_API support

   - fix comment typos

   - fixes for undefined symbols

   - remove unused code and variables

   - elf-fdpic loader support for m68k"

* tag 'm68knommu-for-v5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu:
  m68knommu: fix 68000 CPU link with no platform selected
  m68k: removed unused "mach_get_ss"
  m68knommu: fix undefined reference to `mach_get_rtc_pll'
  m68knommu: fix undefined reference to `_init_sp'
  m68knommu: allow elf_fdpic loader to be selected
  m68knommu: add definitions to support elf_fdpic program loader
  m68knommu: implement minimal regset support
  m68knommu: use asm-generic/mmu.h for nommu setups
  m68k: fix typos in comments
  m68k: coldfire: drop ISA_DMA_API support
  m68knommu: set ZERO_PAGE() to the allocated zeroed page

Merge ACPI battery and backlight driver update and miscellaneous
cleanup for 5.19-rc1:

 - Make the ACPI battery driver show the "not-charging" status by
   default unless "charging" or "full" is directly indicated (Werner
   Sembach).

 - Improve the PM notifier in the ACPI backlight driver (Zhang Rui).

 - Clean up some white space in the ACPI code (Ian Cowan).

* acpi-battery:
  ACPI: battery: Make "not-charging" the default on no charging or full info

* acpi-video:
  ACPI: video: improve PM notifer callback

* acpi-misc:
  ACPI: clean up white space in a few places for consistency

Merge general ACPI cleanups and processor support updates for 5.19-rc1:

 - Rearrange find_child_checks() to simplify code (Rafael Wysocki).

 - Use memremap() to map the UCSI mailbox that is always in main memory
   and drop acpi_release_memory() that has no more users (Heikki
   Krogerus, Dan Carpenter).

 - Make max_cstate/nocst/bm_check_disable processor module parameters
   visible in sysfs (Yajun Deng).

 - Fix typo in the CPPC driver (Julia Lawall).

* acpi-glue:
  ACPI: glue: Rearrange find_child_checks()

* acpi-osl:
  usb: typec: ucsi: acpi: fix a NULL vs IS_ERR() check in probe
  ACPI: OSL: Remove the helper for deactivating memory region
  usb: typec: ucsi: acpi: Map the mailbox with memremap()

* acpi-processor:
  ACPI: processor: idle: Expose max_cstate/nocst/bm_check_disable read-only in sysfs

* acpi-cppc:
  ACPI: CPPC: fix typo in comment

The devm_memremap() function never returns NULL.  It returns error
pointers.

Fixes: cdc3d2ab ("usb: typec: ucsi: acpi: Map the mailbox with memremap()")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Those old syscalls aren't exported via our syscall table, so just drop
them.
Signed-off-by: Helge Deller <deller@gmx.de>

Merge system power off handling rework from Dmitry Osipenko for
5.19-rc1.

This introduces a mechanism allowing power sequences to be used for
powering off the system and makes related changes in platform-specific
code for multiple platforms.

* pm-sysoff: (29 commits)
  kernel/reboot: Change registration order of legacy power-off handler
  m68k: virt: Switch to new sys-off handler API
  kernel/reboot: Add devm_register_restart_handler()
  kernel/reboot: Add devm_register_power_off_handler()
  soc/tegra: pmc: Use sys-off handler API to power off Nexus 7 properly
  reboot: Remove pm_power_off_prepare()
  regulator: pfuze100: Use devm_register_sys_off_handler()
  ACPI: power: Switch to sys-off handler API
  memory: emif: Use kernel_can_power_off()
  mips: Use do_kernel_power_off()
  ia64: Use do_kernel_power_off()
  x86: Use do_kernel_power_off()
  sh: Use do_kernel_power_off()
  m68k: Switch to new sys-off handler API
  powerpc: Use do_kernel_power_off()
  xen/x86: Use do_kernel_power_off()
  parisc: Use do_kernel_power_off()
  arm64: Use do_kernel_power_off()
  riscv: Use do_kernel_power_off()
  csky: Use do_kernel_power_off()
  ...

Merge PM documentation update for 5.19-rc1.

* pm-docs:
  Documentation: admin-guide: PM: Add Out of Band mode

Merge OPP (Operating Performance Points) changes for 5.19-rc1:

 - Minor update to dt-binding for Qcom's opp-v2-kryo-cpu (Yassine
   Oudjana).

 - Use list iterator only inside the list_for_each_entry loop (Xiaomeng
   Tong, and Jakob Koschel).

 - New APIs related to finding OPP based on interconnect bandwidth
   (Krzysztof Kozlowski).

 - Fix the missing of_node_put() in _bandwidth_supported() (Dan
   Carpenter).

 - Cleanups (Krzysztof Kozlowski, and Viresh Kumar).

* pm-opp:
  opp: Reorder definition of ceil/floor helpers
  opp: Add apis to retrieve opps with interconnect bandwidth
  dt-bindings: opp: opp-v2-kryo-cpu: Remove SMEM
  opp: use list iterator only inside the loop
  opp: replace usage of found with dedicated list iterator variable
  PM: opp: simplify with dev_err_probe()
  OPP: call of_node_put() on error path in _bandwidth_supported()