[Intel-gfx] [RFC PATCH 1/8] drm/i915: introduce a new modparam: enable_vgt

[Jike Song]

To provide Intel GPU virtualization, the host i915
driver needs to support vgt - an in-kernel device
model of Intel GPU.

Signed-off-by: Jike Song <jike.song at intel.com>
---
 drivers/gpu/drm/i915/i915_drv.h    | 1 +
 drivers/gpu/drm/i915/i915_params.c | 4 ++++
 2 files changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index ed6cf10..c3b03f5 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2260,6 +2260,7 @@ struct i915_params {
 	bool disable_vtd_wa;
 	int use_mmio_flip;
 	bool mmio_debug;
+	bool enable_vgt;
 };
 extern struct i915_params i915 __read_mostly;
 
diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c
index 139f490..552949a 100644
--- a/drivers/gpu/drm/i915/i915_params.c
+++ b/drivers/gpu/drm/i915/i915_params.c
@@ -51,6 +51,7 @@ struct i915_params i915 __read_mostly = {
 	.disable_vtd_wa = 0,
 	.use_mmio_flip = 0,
 	.mmio_debug = 0,
+	.enable_vgt = 0,
 };
 
 module_param_named(modeset, i915.modeset, int, 0400);
@@ -173,3 +174,6 @@ module_param_named(mmio_debug, i915.mmio_debug, bool, 0600);
 MODULE_PARM_DESC(mmio_debug,
 	"Enable the MMIO debug code (default: false). This may negatively "
 	"affect performance.");
+
+module_param_named(enable_vgt, i915.enable_vgt, bool, 0600);
+MODULE_PARM_DESC(enable_vgt, "Enable the Intel GVT-g Host support for GPU Virtulization");
-- 
1.9.1