Commit 5f55be5f authored Aug 24, 2017 by Thomas Hellstrom Committed by Sinclair Yeh Aug 28, 2017

drm/vmwgfx: Support the NOP_ERROR command



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>

parent 65b97a2b

drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -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,

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