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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2018-07-12 19:53:12 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-11-12 19:18:48 +0100 |
| commit | 9d41e1d06a46c20ea0ddf25a366192a9f7810f8e (patch) | |
| tree | 804208edee0b9aa56778ac5a413aaff04f68d6ac | |
| parent | 0a41eb61a26b19fa7172c41410126ec1058769e1 (diff) | |
| download | linux-stable-9d41e1d06a46c20ea0ddf25a366192a9f7810f8e.tar.gz linux-stable-9d41e1d06a46c20ea0ddf25a366192a9f7810f8e.tar.bz2 linux-stable-9d41e1d06a46c20ea0ddf25a366192a9f7810f8e.zip | |
drm/i915/gtt: Disable read-only support under GVT
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: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_gtt.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index bc79d952b81a..920d064e9b53 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -1343,8 +1343,12 @@ static int gen8_ppgtt_init(struct i915_hw_ppgtt *ppgtt) return ret; } - /* 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(dev_priv); /* There are only few exceptions for gen >=6. chv and bxt. * And we are not sure about the latter so play safe for now. |