15  * @ctx: packet context to decode
16  * @packet: expected packet
17  * @new_ctx: expected new packet context
18  * @ctx_unchanged: the packet context must not change
24 	struct intel_pt_pkt packet;  member
28 	/* Padding Packet */
30 	/* Short Taken/Not Taken Packet */
35 	/* Long Taken/Not Taken Packet */
40 	/* Target IP Packet */
47 	/* Packet Generation Enable */
54 	/* Packet Generation Disable */
61 	/* Flow Update Packet */
68 	/* Paging Information Packet */
71 	/* Mode Exec Packet */
75 	/* Mode TSX Packet */
79 	/* Trace Stop Packet */
81 	/* Core:Bus Ratio Packet */
83 	/* Timestamp Counter Packet */
85 	/* Mini Time Counter Packet */
87 	/* TSC / MTC Alignment Packet */
92 	/* Cycle Count Packet */
114 	/* Virtual-Machine Control Structure Packet */
116 	/* Overflow Packet */
120 	/* Packet Stream Boundary*/
124 	/* PSB End Packet */
126 	/* Maintenance Packet */
128 	/* Write Data to PT Packet */
133 	/* Execution Stop Packet */
136 	/* Monitor Wait Packet */
140 	/* Power Entry Packet */
145 	/* Power Exit Packet */
149 	/* Block Begin Packet */
154 	/* 4-byte Block Item Packet */
159 	/* 8-byte Block Item Packet */
164 	/* Block End Packet */
173 static int dump_packet(struct intel_pt_pkt *packet, u8 *bytes, int len)  in dump_packet()  argument
183 	ret = intel_pt_pkt_desc(packet, desc, INTEL_PT_PKT_DESC_MAX);  in dump_packet()
197 	dump_packet(&d->packet, d->bytes, d->len);  in decoding_failed()
200 static int fail(struct test_data *d, struct intel_pt_pkt *packet, int len,  in fail()  argument
209 	if (packet->type != d->packet.type)  in fail()
211 			 d->packet.type, packet->type);  in fail()
213 	if (packet->count != d->packet.count)  in fail()
215 			 d->packet.count, packet->count);  in fail()
217 	if (packet->payload != d->packet.payload)  in fail()
219 			 (unsigned long long)d->packet.payload,  in fail()
220 			 (unsigned long long)packet->payload);  in fail()
223 		pr_debug("Expected packet context: %d   Decoded packet context %d\n",  in fail()
229 static int test_ctx_unchanged(struct test_data *d, struct intel_pt_pkt *packet,  in test_ctx_unchanged()  argument
234 	intel_pt_upd_pkt_ctx(packet, &ctx);  in test_ctx_unchanged()
238 		pr_debug("Packet context changed!\n");  in test_ctx_unchanged()
247 	struct intel_pt_pkt packet;  in test_one()  local
251 	memset(&packet, 0xff, sizeof(packet));  in test_one()
253 	/* Decode a packet */  in test_one()
254 	ret = intel_pt_get_packet(d->bytes, d->len, &packet, &ctx);  in test_one()
261 	/* Some packets must always leave the packet context unchanged */  in test_one()
265 		err = test_ctx_unchanged(d, &packet, INTEL_PT_NO_CTX);  in test_one()
268 		err = test_ctx_unchanged(d, &packet, INTEL_PT_BLK_4_CTX);  in test_one()
271 		err = test_ctx_unchanged(d, &packet, INTEL_PT_BLK_8_CTX);  in test_one()
277 	if (ret != d->len || packet.type != d->packet.type ||  in test_one()
278 	    packet.count != d->packet.count ||  in test_one()
279 	    packet.payload != d->packet.payload || ctx != d->new_ctx)  in test_one()
280 		return fail(d, &packet, ret, ctx);  in test_one()
283 	ret = dump_packet(&d->packet, d->bytes, d->len);  in test_one()
289  * This test feeds byte sequences to the Intel PT packet decoder and checks the
290  * results. Changes to the packet context are also checked.