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Commit c9e66688 authored by Chris Wilson's avatar Chris Wilson
Browse files

drm/i915/gtt: Disable read-only support under GVT 



GVT is not propagating the PTE bits, and is always setting the
read-write bit, thus breaking read-only support.

Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Cc: Zhenyu Wang <zhenyuw@linux.intel.com>
Cc: Jon Bloomfield <jon.bloomfield@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Matthew Auld <matthew.william.auld@gmail.com>
Reviewed-by: default avatarJon Bloomfield <jon.bloomfield@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180712185315.3288-3-chris@chris-wilson.co.uk
parent 250f8c81

drivers/gpu/drm/i915/i915_gem_gtt.c

+6 −2
Original line number Diff line number Diff line
@@ -1662,8 +1662,12 @@ static struct i915_hw_ppgtt *gen8_ppgtt_create(struct drm_i915_private *i915) 
		1ULL << 48 :

		1ULL << 32;



	/* From bdw, there is support for read-only pages in the PPGTT */

	ppgtt->vm.has_read_only = true;

	/*

	 * From bdw, there is support for read-only pages in the PPGTT.

	 *

	 * XXX GVT is not honouring the lack of RW in the PTE bits.

	 */

	ppgtt->vm.has_read_only = !intel_vgpu_active(i915);



	i915_address_space_init(&ppgtt->vm, i915);