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: Chris 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: Jon Bloomfield <jon.bloomfield@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180712185315.3288-3-chris@chris-wilson.co.uk
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@ -1662,8 +1662,12 @@ static struct i915_hw_ppgtt *gen8_ppgtt_create(struct drm_i915_private *i915)
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1ULL << 48 :
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1ULL << 32;
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/* From bdw, there is support for read-only pages in the PPGTT */
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ppgtt->vm.has_read_only = true;
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/*
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* From bdw, there is support for read-only pages in the PPGTT.
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*
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* XXX GVT is not honouring the lack of RW in the PTE bits.
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*/
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ppgtt->vm.has_read_only = !intel_vgpu_active(i915);
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i915_address_space_init(&ppgtt->vm, i915);
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