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

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commit c9e666880de5a1fed04dc412b046916d542b72dd upstream.

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
Signed-off--by: Jon Bloomfield <jon.bloomfield@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Chris Wilson 2018-07-12 19:53:12 +01:00 committed by Greg Kroah-Hartman
parent 85e04705c9
commit 9c37932bf6
1 changed files with 6 additions and 2 deletions
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8
drivers/gpu/drm/i915/i915_gem_gtt.c
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@ -1525,8 +1525,12 @@ static int gen8_ppgtt_init(struct i915_hw_ppgtt *ppgtt)
ppgtt->base.unbind_vma = ppgtt_unbind_vma;
ppgtt->base.bind_vma = ppgtt_bind_vma;
/* From bdw, there is support for read-only pages in the PPGTT */
ppgtt->base.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->base.has_read_only = !intel_vgpu_active(to_i915(ppgtt->base.dev));
ppgtt->debug_dump = gen8_dump_ppgtt;