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drm/i915/gvt: set guest display buffer as readonly

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We shouldn't allow write for exposed guest display buffer which
doesn't make sense. So explicitly set read only flag for display
dmabuf allocated object.

Fixes: e546e281d3 ("drm/i915/gvt: Dmabuf support for GVT-g")
Cc: Tina Zhang <tina.zhang@intel.com>
Acked-by: Tina Zhang <tina.zhang@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20191212084614.1100-1-zhenyuw@linux.intel.com
This commit is contained in:
Zhenyu Wang 2019-12-12 16:46:14 +08:00
parent 6d44694dc7
commit 4fc0a3ca72
1 changed files with 1 additions and 0 deletions
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drivers/gpu/drm/i915/gvt/dmabuf.c
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@ -163,6 +163,7 @@ static struct drm_i915_gem_object *vgpu_create_gem(struct drm_device *dev,
drm_gem_private_object_init(dev, &obj->base,
roundup(info->size, PAGE_SIZE));
i915_gem_object_init(obj, &intel_vgpu_gem_ops, &lock_class);
i915_gem_object_set_readonly(obj);
obj->read_domains = I915_GEM_DOMAIN_GTT;
obj->write_domain = 0;