Merge tag 'char-misc-5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc driver updates from Greg KH:
 "Here is the big set of char, misc, and other assorted driver subsystem
  patches for 5.10-rc1.

  There's a lot of different things in here, all over the drivers/
  directory. Some summaries:

   - soundwire driver updates

   - habanalabs driver updates

   - extcon driver updates

   - nitro_enclaves new driver

   - fsl-mc driver and core updates

   - mhi core and bus updates

   - nvmem driver updates

   - eeprom driver updates

   - binder driver updates and fixes

   - vbox minor bugfixes

   - fsi driver updates

   - w1 driver updates

   - coresight driver updates

   - interconnect driver updates

   - misc driver updates

   - other minor driver updates

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'char-misc-5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (396 commits)
  binder: fix UAF when releasing todo list
  docs: w1: w1_therm: Fix broken xref, mistakes, clarify text
  misc: Kconfig: fix a HISI_HIKEY_USB dependency
  LSM: Fix type of id parameter in kernel_post_load_data prototype
  misc: Kconfig: add a new dependency for HISI_HIKEY_USB
  firmware_loader: fix a kernel-doc markup
  w1: w1_therm: make w1_poll_completion static
  binder: simplify the return expression of binder_mmap
  test_firmware: Test partial read support
  firmware: Add request_partial_firmware_into_buf()
  firmware: Store opt_flags in fw_priv
  fs/kernel_file_read: Add "offset" arg for partial reads
  IMA: Add support for file reads without contents
  LSM: Add "contents" flag to kernel_read_file hook
  module: Call security_kernel_post_load_data()
  firmware_loader: Use security_post_load_data()
  LSM: Introduce kernel_post_load_data() hook
  fs/kernel_read_file: Add file_size output argument
  fs/kernel_read_file: Switch buffer size arg to size_t
  fs/kernel_read_file: Remove redundant size argument
  ...

1 files changed, 37 insertions, 0 deletions

diff --git a/Documentation/driver-api/mei/mei.rst b/Documentation/driver-api/mei/mei.rst
index c800d8e5f422..cea0b69ec216 100644
--- a/Documentation/driver-api/mei/mei.rst
+++ b/Documentation/driver-api/mei/mei.rst
@@ -42,6 +42,11 @@ The session is terminated calling :c:func:`close(int fd)`.
 
 A code snippet for an application communicating with Intel AMTHI client:
 
+In order to support virtualization or sandboxing a trusted supervisor
+can use :c:macro:`MEI_CONNECT_CLIENT_IOCTL_VTAG` to create
+virtual channels with an Intel ME feature. Not all features support
+virtual channels such client with answer EOPNOTSUPP.
+
 .. code-block:: C
 
 	struct mei_connect_client_data data;
@@ -110,6 +115,38 @@ Connect to firmware Feature/Client.
         data that can be sent or received. (e.g. if MTU=2K, can send
         requests up to bytes 2k and received responses up to 2k bytes).
 
+IOCTL_MEI_CONNECT_CLIENT_VTAG:
+------------------------------
+
+.. code-block:: none
+
+        Usage:
+
+        struct mei_connect_client_data_vtag client_data_vtag;
+
+        ioctl(fd, IOCTL_MEI_CONNECT_CLIENT_VTAG, &client_data_vtag);
+
+        Inputs:
+
+        struct mei_connect_client_data_vtag - contain the following
+        Input field:
+
+                in_client_uuid -  GUID of the FW Feature that needs
+                                  to connect to.
+                vtag - virtual tag [1, 255]
+
+         Outputs:
+                out_client_properties - Client Properties: MTU and Protocol Version.
+
+         Error returns:
+
+                ENOTTY No such client (i.e. wrong GUID) or connection is not allowed.
+                EINVAL Wrong IOCTL Number or tag == 0
+                ENODEV Device or Connection is not initialized or ready.
+                ENOMEM Unable to allocate memory to client internal data.
+                EFAULT Fatal Error (e.g. Unable to access user input data)
+                EBUSY  Connection Already Open
+                EOPNOTSUPP Vtag is not supported
 
 IOCTL_MEI_NOTIFY_SET
 ---------------------