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drm/amdgpu: don't allow userspace to create a doorbell BO

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We need the domains in amdgpu_drm.h for the kernel driver to manage
the pool, but we don't want userspace using it until the code
is ready.  So reject for now.

Acked-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2023-08-09 15:03:55 -04:00
parent 80e28aaf93
commit 6be2ad4f00
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
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@ -289,6 +289,10 @@ int amdgpu_gem_create_ioctl(struct drm_device *dev, void *data,
uint32_t handle, initial_domain;
int r;
/* reject DOORBELLs until userspace code to use it is available */
if (args->in.domains & AMDGPU_GEM_DOMAIN_DOORBELL)
return -EINVAL;
/* reject invalid gem flags */
if (flags & ~(AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED |
AMDGPU_GEM_CREATE_NO_CPU_ACCESS |