drm/i915/gvt: Utility for valid command length check (4f870f1f) · Commits · 戴 / test

drivers/gpu/drm/i915/gvt/cmd_parser.c

+9 −6

Original line number	Diff line number	Diff line
		@@ -378,17 +378,17 @@ struct cmd_info {
		const char *name;
		u32 opcode;

		#define F_LEN_MASK (1U<<0)
		#define F_LEN_MASK 3U
		#define F_LEN_CONST 1U
		#define F_LEN_VAR 0U
		/* value is const although LEN maybe variable */
		#define F_LEN_VAR_FIXED (1<<1)

		/*
		* command has its own ip advance logic
		* e.g. MI_BATCH_START, MI_BATCH_END
		*/
		#define F_IP_ADVANCE_CUSTOM (1<<1)

		#define F_POST_HANDLE (1<<2)
		#define F_IP_ADVANCE_CUSTOM (1<<2)
		u32 flag;

		#define R_RCS BIT(RCS0)
		@@ -418,9 +418,12 @@ struct cmd_info {
		* flag == F_LEN_VAR : length bias bits
		* Note: length is in DWord
		*/
		u8 len;
		u32 len;

		parser_cmd_handler handler;

		/* valid length in DWord */
		u32 valid_len;
		};

		struct cmd_entry {
		@@ -1912,7 +1915,7 @@ static const struct cmd_info cmd_info[] = {
		{"MI_RS_CONTEXT", OP_MI_RS_CONTEXT, F_LEN_CONST, R_RCS, D_ALL, 0, 1,
		NULL},

		{"MI_DISPLAY_FLIP", OP_MI_DISPLAY_FLIP, F_LEN_VAR \| F_POST_HANDLE,
		{"MI_DISPLAY_FLIP", OP_MI_DISPLAY_FLIP, F_LEN_VAR,
		R_RCS \| R_BCS, D_ALL, 0, 8, cmd_handler_mi_display_flip},

		{"MI_SEMAPHORE_MBOX", OP_MI_SEMAPHORE_MBOX, F_LEN_VAR, R_ALL, D_ALL,