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drm/vmwgfx: Support the NOP_ERROR command

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Can be used by user-space applications to test and verify the kernel
command buffer error recovery functionality.

Malicious user-space apps could potentially use this command to slow down
graphics processing somewhat, but they could also accomplish the same thing
using a random malformed command so this should be considered safe.
At least as safe as it gets.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
This commit is contained in:
Thomas Hellstrom 2017-08-24 08:06:30 +02:00 committed by Sinclair Yeh
parent 65b97a2bec
commit 5f55be5f30
1 changed files with 2 additions and 0 deletions
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drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
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@ -3303,6 +3303,8 @@ static const struct vmw_cmd_entry vmw_cmd_entries[SVGA_3D_CMD_MAX] = {
true, false, true),
VMW_CMD_DEF(SVGA_3D_CMD_NOP, &vmw_cmd_ok,
true, false, true),
VMW_CMD_DEF(SVGA_3D_CMD_NOP_ERROR, &vmw_cmd_ok,
true, false, true),
VMW_CMD_DEF(SVGA_3D_CMD_ENABLE_GART, &vmw_cmd_invalid,
false, false, true),
VMW_CMD_DEF(SVGA_3D_CMD_DISABLE_GART, &vmw_cmd_invalid,