Merge feature/dxgkrnl/5.15 into v5.15.59

* commit '9d4fe4f93bee536ee30db016067571fccdb88608': drivers:hv:dxgkrnl: Handle the new behavior of the VM bus channel where channel->max_pkt_size needs to be initialized. Allow killing a process waiting for a VM bus message reply drivers: hv: dxgkrnl: Implement support for mapping guest pages on the host. drivers: hv: dxgkrnl: Implement DXGSYNCFILE drivers: hv: dxgkrnl: Implementation of submit command, paging and hardware queue. drivers: hv: dxgkrnl: Seal the shared resource object when dxgk_share_objects is called. drivers: hv: dxgkrnl: Implement sharing resources and sync objects drivers: hv: dxgkrnl: Implement operations with GPU sync objects drivers: hv: dxgkrnl: Implement creation/destruction of GPU allocations/resources drivers: hv: dxgkrnl: Driver initialization and creation of dxgadapter

Author: tyhicks

MAINTAINERS

@@ -8736,6 +8736,12 @@ F:	Documentation/devicetree/bindings/mtd/ti,am654-hbmc.txt
 F:	drivers/mtd/hyperbus/
 F:	include/linux/mtd/hyperbus.h
 
+Hyper-V vGPU DRIVER
+M:	Iouri Tarassov <iourit@microsoft.com>
+L:	linux-hyperv@vger.kernel.org
+S:	Supported
+F:	drivers/hv/dxgkrnl/
+
 HYPERVISOR VIRTUAL CONSOLE DRIVER
 L:	linuxppc-dev@lists.ozlabs.org
 S:	Odd Fixes

drivers/hv/Kconfig

@@ -29,4 +29,6 @@ config HYPERV_BALLOON
 help
  Select this option to enable Hyper-V Balloon driver.
 
+source "drivers/hv/dxgkrnl/Kconfig"
+
 endmenu

drivers/hv/Makefile

@@ -2,6 +2,7 @@
 obj-$(CONFIG_HYPERV)+= hv_vmbus.o
 obj-$(CONFIG_HYPERV_UTILS)+= hv_utils.o
 obj-$(CONFIG_HYPERV_BALLOON)+= hv_balloon.o
+obj-$(CONFIG_DXGKRNL)+= dxgkrnl/
 
 CFLAGS_hv_trace.o = -I$(src)
 CFLAGS_hv_balloon.o = -I$(src)

drivers/hv/dxgkrnl/Kconfig

@@ -0,0 +1,28 @@
+#
+# dxgkrnl configuration
+#
+
+config DXGKRNL
+tristate "Microsoft Paravirtualized GPU support"
+depends on HYPERV
+depends on 64BIT || COMPILE_TEST
+select DMA_SHARED_BUFFER
+select SYNC_FILE
+help
+ This driver supports paravirtualized virtual compute devices, exposed
+ by Microsoft Hyper-V when Linux is running inside of a virtual machine
+ hosted by Windows. The virtual machines needs to be configured to use
+ host compute adapters. The driver name is dxgkrnl.
+
+ An example of such virtual machine is a Windows Subsystem for
+ Linux container. When such container is instantiated, the Windows host
+ assigns compatible host GPU adapters to the container. The corresponding
+ virtual GPU devices appear on the PCI bus in the container. These
+ devices are enumerated and accessed by this driver.
+
+ Communications with the driver are done by using the Microsoft libdxcore
+ library, which translates the D3DKMT interface
+ <https://docs.microsoft.com/en-us/windows-hardware/drivers/ddi/d3dkmthk/>
+ to the driver IOCTLs. The virtual GPU devices are paravirtualized,
+ which means that access to the hardware is done in the host. The driver
+ communicates with the host using Hyper-V VM bus communication channels.

drivers/hv/dxgkrnl/Makefile

@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0
+# Makefile for the Linux video drivers.
+
+obj-$(CONFIG_DXGKRNL)+= dxgkrnl.o
+dxgkrnl-y := dxgmodule.o hmgr.o misc.o dxgadapter.o ioctl.o dxgvmbus.o dxgprocess.o dxgsyncfile.o