[Intel-gfx] [PATCH] Documentation/gpu: Add section for Intel GVT-g host support

[Zhenyu Wang]

Update with brief overview and reference for more detailed
arch design documents.

Add new section for Intel GVT-g host support.

Signed-off-by: Zhenyu Wang <zhenyuw at linux.intel.com>
---
 Documentation/gpu/i915.rst       | 9 +++++++++
 drivers/gpu/drm/i915/intel_gvt.c | 8 ++++++--
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/Documentation/gpu/i915.rst b/Documentation/gpu/i915.rst
index 87aaffc..95ce77f 100644
--- a/Documentation/gpu/i915.rst
+++ b/Documentation/gpu/i915.rst
@@ -49,6 +49,15 @@ Intel GVT-g Guest Support(vGPU)
 .. kernel-doc:: drivers/gpu/drm/i915/i915_vgpu.c
    :internal:
 
+Intel GVT-g Host Support(vGPU device model)
+-------------------------------------------
+
+.. kernel-doc:: drivers/gpu/drm/i915/intel_gvt.c
+   :doc: Intel GVT-g host support
+
+.. kernel-doc:: drivers/gpu/drm/i915/intel_gvt.c
+   :internal:
+
 Display Hardware Handling
 =========================
 
diff --git a/drivers/gpu/drm/i915/intel_gvt.c b/drivers/gpu/drm/i915/intel_gvt.c
index bae1a7d..88126b6 100644
--- a/drivers/gpu/drm/i915/intel_gvt.c
+++ b/drivers/gpu/drm/i915/intel_gvt.c
@@ -31,8 +31,12 @@
  * GPU among multiple virtual machines on a time-sharing basis. Each
  * virtual machine is presented a virtual GPU (vGPU), which has equivalent
  * features as the underlying physical GPU (pGPU), so i915 driver can run
- * seamlessly in a virtual machine. This file provides the englightments
- * of GVT and the necessary components used by GVT in i915 driver.
+ * seamlessly in a virtual machine.
+ *
+ * To virtualize GPU resources GVT-g driver depends on hypervisor technology
+ * e.g KVM/VFIO/mdev, Xen, etc. to provide resource access trapping capability
+ * and be virtualized within GVT-g device module. More architectural design
+ * doc is available on https://01.org/group/2230/documentation-list.
  */
 
 static bool is_supported_device(struct drm_i915_private *dev_priv)
-- 
2.9.3