20  * @ctx: packet context to decode
21  * @packet: expected packet
22  * @new_ctx: expected new packet context
23  * @ctx_unchanged: the packet context must not change
29 	struct intel_pt_pkt packet;  member
33 	/* Padding Packet */
35 	/* Short Taken/Not Taken Packet */
40 	/* Long Taken/Not Taken Packet */
45 	/* Target IP Packet */
52 	/* Packet Generation Enable */
59 	/* Packet Generation Disable */
66 	/* Flow Update Packet */
73 	/* Paging Information Packet */
76 	/* Mode Exec Packet */
83 	/* Mode TSX Packet */
87 	/* Trace Stop Packet */
89 	/* Core:Bus Ratio Packet */
91 	/* Timestamp Counter Packet */
93 	/* Mini Time Counter Packet */
95 	/* TSC / MTC Alignment Packet */
100 	/* Cycle Count Packet */
122 	/* Virtual-Machine Control Structure Packet */
124 	/* Overflow Packet */
128 	/* Packet Stream Boundary*/
132 	/* PSB End Packet */
134 	/* Maintenance Packet */
136 	/* Write Data to PT Packet */
141 	/* Execution Stop Packet */
144 	/* Monitor Wait Packet */
148 	/* Power Entry Packet */
153 	/* Power Exit Packet */
157 	/* Block Begin Packet */
162 	/* 4-byte Block Item Packet */
167 	/* 8-byte Block Item Packet */
172 	/* Block End Packet */
177 	/* Control Flow Event Packet */
189 static int dump_packet(const struct intel_pt_pkt *packet, const u8 *bytes, int len)  in dump_packet()  argument
199 	ret = intel_pt_pkt_desc(packet, desc, INTEL_PT_PKT_DESC_MAX);  in dump_packet()
213 	dump_packet(&d->packet, d->bytes, d->len);  in decoding_failed()
216 static int fail(const struct test_data *d, struct intel_pt_pkt *packet, int len,  in fail()  argument
225 	if (packet->type != d->packet.type)  in fail()
227 			 d->packet.type, packet->type);  in fail()
229 	if (packet->count != d->packet.count)  in fail()
231 			 d->packet.count, packet->count);  in fail()
233 	if (packet->payload != d->packet.payload)  in fail()
235 			 (unsigned long long)d->packet.payload,  in fail()
236 			 (unsigned long long)packet->payload);  in fail()
239 		pr_debug("Expected packet context: %d   Decoded packet context %d\n",  in fail()
245 static int test_ctx_unchanged(const struct test_data *d, struct intel_pt_pkt *packet,  in test_ctx_unchanged()  argument
250 	intel_pt_upd_pkt_ctx(packet, &ctx);  in test_ctx_unchanged()
254 		pr_debug("Packet context changed!\n");  in test_ctx_unchanged()
263 	struct intel_pt_pkt packet;  in test_one()  local
267 	memset(&packet, 0xff, sizeof(packet));  in test_one()
269 	/* Decode a packet */  in test_one()
270 	ret = intel_pt_get_packet(d->bytes, d->len, &packet, &ctx);  in test_one()
277 	/* Some packets must always leave the packet context unchanged */  in test_one()
281 		err = test_ctx_unchanged(d, &packet, INTEL_PT_NO_CTX);  in test_one()
284 		err = test_ctx_unchanged(d, &packet, INTEL_PT_BLK_4_CTX);  in test_one()
287 		err = test_ctx_unchanged(d, &packet, INTEL_PT_BLK_8_CTX);  in test_one()
293 	if (ret != d->len || packet.type != d->packet.type ||  in test_one()
294 	    packet.count != d->packet.count ||  in test_one()
295 	    packet.payload != d->packet.payload || ctx != d->new_ctx)  in test_one()
296 		return fail(d, &packet, ret, ctx);  in test_one()
299 	ret = dump_packet(&d->packet, d->bytes, d->len);  in test_one()
305  * This test feeds byte sequences to the Intel PT packet decoder and checks the
306  * results. Changes to the packet context are also checked.