1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
|
{
"answers": {
"q1_first_touch": {
"addr": 2305843009213696512,
"answer": "the first MMIO is a 4-byte read of PA 0x2000000000000a00 at fw PC 0x4009014; it is the QEMU-documented first fault",
"matches_qemu_reference": true,
"pc_fw": 67145748,
"rw": "r",
"size": 4
},
"q2_path": {
"answer": "entry state is all-zero (no bootloader handoff modelled); the bootstrap builds the device PA with 5 arithmetic instructions (li/slli/addi/slli/addi), reads it, then runs the chip-ID comparison chain: 25 instructions recorded from entry until the halt at fw 0x4009070",
"entry_regs_zero": false,
"halt_pc_fw": 67145840,
"halt_seen": true,
"instructions_to_halt": 25,
"trace_path_fw": [
67145728,
67145732,
67145736,
67145740,
67145744,
67145748,
67145752,
67145756,
67145760,
67145764,
67145768,
67145772,
67145776,
67145780,
67145784,
67145788,
67145792,
67145796,
67145800,
67145804,
67145808,
67145812,
67145824,
67145828,
67145840
]
},
"q3_id_field": {
"ampere_id": 368,
"answer": "the read value's bits [28:20] are extracted (srli 20, andi 0x1ff) and compared against 354..360 (Turing) and 368 (Ampere); the image itself defines this as a chip-ID field",
"disassembly": [
"0x84009000: 0010029b addiw t0,zero,1",
"0x84009004: 03129293 slli t0,t0,49",
"0x84009008: 00128293 addi t0,t0,1",
"0x8400900c: 00c29293 slli t0,t0,12",
"0x84009010: a0028293 addi t0,t0,-1536",
"0x84009014: 0002a283 lw t0,0(t0)",
"0x84009018: 0142d293 srli t0,t0,20",
"0x8400901c: 1ff2f293 andi t0,t0,511"
],
"mask": 511,
"shift": 20,
"turing_ids": [
354,
355,
356,
357,
358,
359,
360
]
},
"q4_dispatch": {
"answer": "ID 354..360 dispatches to .tu10x_text at 0x4007000; ID 368 dispatches to .ga100_text at 0x4005000; any other value (including the lenient zero) falls to the fail-closed `j .` loop at 0x4009070",
"ga100_target": 67129344,
"halt_pc": 67145840,
"sections": {
"bootstrap": ".bootstrap",
"ga100_target": ".ga100_text",
"tu10x_target": ".tu10x_text"
},
"tu10x_target": 67137536
},
"q5_next_blocker": {
"answer": "with a Turing ID served, .tu10x_text programs CSRs 0x7c8-0x7cc (region descriptors) and enables mstatus FP/SIMD state, then builds the absolute link-time address 0x40070f8 and jumps to it; because the loader relocates segments but not absolute immediates, that jump lands outside RAM and faults - a relocation artifact, so the next rung needs a chip-ID device model plus load-at-link-address/alias translation",
"disassembly_tail": [
"0x840070e4: 1e0002b7 lui t0,0x1e000",
"0x840070e8: 3002a073 csrs mstatus,t0",
"0x840070ec: 040072b7 lui t0,0x4007",
"0x840070f0: 0f828293 addi t0,t0,248",
"0x840070f4: 00028067 jalr zero,0(t0)"
],
"modeled_run": {
"fault_signal": 11,
"instructions": 74,
"jumps": [
{
"pc_fw": 67137780,
"t0_absolute_target": 67137784,
"target_fw": 67137784
}
],
"stop_outside_ram": true,
"stop_pc_fw": 67137784
}
}
},
"baseline": {
"manual_estimate_s": 600.0,
"manual_method": "floor estimate: ~90 instructions across .bootstrap + .tu10x_text + .ga100_text read by hand, dispatch table identified and correlated with the QEMU first-fault report; not measured in this run",
"qemu_first_fault": {
"access_addr": 2305843009213696512,
"cause": 5,
"desc": "fault_load",
"epc": 2214629396,
"epc_fw": 67145748,
"reason": "rejected",
"rw": "read",
"size": 4
},
"qemu_method": "python3 -m greeneye.cli probe <image> --duration 1.0 (here run via harness.run_qemu_baseline, 0.5 s bound)",
"qemu_probe_wall_s": 0.9495,
"qemu_session": "harness/re_demo/sessions/qemu-probe",
"qemu_session_hashes": {
"events.jsonl": "8c4dba8006a496d853c81ce9e2b16944cd27b8d6171c01777daa6e5738be02bc",
"session.json": "c7bf5e4d29f534160d660dadb81f81942faa17cbfb1941587c60dcf78180f56c",
"summary.md": "d141fa06d3e2d0603f3b99ad7603758e1fc14627aed74c6fe8a6ad22c56eb14b"
},
"total_s": 600.9495
},
"emulator": {
"lenient": {
"disassembly": [
"0x84009000: 0010029b addiw t0,zero,1",
"0x84009004: 03129293 slli t0,t0,49",
"0x84009008: 00128293 addi t0,t0,1",
"0x8400900c: 00c29293 slli t0,t0,12",
"0x84009010: a0028293 addi t0,t0,-1536",
"0x84009014: 0002a283 lw t0,0(t0)",
"0x84009018: 0142d293 srli t0,t0,20",
"0x8400901c: 1ff2f293 andi t0,t0,511"
],
"entry_regs_zero": false,
"first_touch_fw_pc": 67145748,
"first_touch_matches_qemu": true,
"first_unknown_mmio": {
"addr": 2305843009213696512,
"pc": 2214629396,
"rw": "r",
"size": 4
},
"hook_stops": [
{
"label": "first_touch_pc",
"pc": 2214629396,
"pc_fw": 67145748,
"t0": 2305843009213696512,
"t1": 0,
"t2": 0
},
{
"label": "halt",
"pc": 2214629488,
"pc_fw": 67145840,
"t0": 0,
"t1": 359,
"t2": 368
}
],
"instructions": 25,
"session": "harness/re_demo/sessions/native-lenient",
"session_hashes": {
"events.jsonl": "ccb568588738c0609071ee542c9b04f7bb2868ee8fae12c28b2bfc5d9343721b",
"session.json": "ec5944adce4b823a3d6fd7d5aa6385fb5b61c2f9542c7221f46f328601c12c66",
"summary.md": "b50820afa60c35da0d4701e54f9907d4b7090c52721e1ecf656942a41bcf44db"
},
"snapshot_bytes": 120,
"stop_pc": 2214629488,
"stop_pc_fw": 67145840,
"trace_exec_count": 25,
"trace_path_fw": [
67145728,
67145732,
67145736,
67145740,
67145744,
67145748,
67145752,
67145756,
67145760,
67145764,
67145768,
67145772,
67145776,
67145780,
67145784,
67145788,
67145792,
67145796,
67145800,
67145804,
67145808,
67145812,
67145824,
67145828,
67145840
],
"wall_s": 0.0006
},
"modeled": {
"assumed_chip_id": 354,
"disassembly_tail": [
"0x840070e4: 1e0002b7 lui t0,0x1e000",
"0x840070e8: 3002a073 csrs mstatus,t0",
"0x840070ec: 040072b7 lui t0,0x4007",
"0x840070f0: 0f828293 addi t0,t0,248",
"0x840070f4: 00028067 jalr zero,0(t0)"
],
"fault_signal": 11,
"fault_stops": [
{
"pc_fw": 67137784,
"signal": 11
}
],
"instructions": 74,
"jumps": [
{
"pc_fw": 67137780,
"t0_absolute_target": 67137784,
"target_fw": 67137784
}
],
"modeled_id": 371195904,
"session": "harness/re_demo/sessions/native-modeled-id",
"session_hashes": {
"events.jsonl": "fdf0756c3543741b74c9267dc9e4d22156f43a4b54463ffbfb1671c327444515",
"session.json": "5ae7eeff56a19ed7eea093a164a3a3738965b56c39f35a563db3ee93a2c90d39",
"summary.md": "bd670d207d23079173b494a9be9f9a0e7d31a10a11f9dc48fb8a134888442d0b"
},
"stop_outside_ram": true,
"stop_pc": 67137784,
"stop_pc_fw": 67137784,
"trace_exec_count": 74,
"trace_path_fw": [
67145728,
67145732,
67145736,
67145740,
67145744,
67145748,
67145752,
67145756,
67145760,
67145764,
67145816,
67145820,
67137536,
67137540,
67137544,
67137548,
67137552,
67137556,
67137560,
67137564,
67137568,
67137572,
67137576,
67137580,
67137584,
67137588,
67137592,
67137596,
67137600,
67137604,
67137608,
67137612,
67137616,
67137620,
67137624,
67137628,
67137632,
67137636,
67137640,
67137644,
67137648,
67137652,
67137656,
67137660,
67137664,
67137668,
67137672,
67137676,
67137680,
67137684,
67137688,
67137692,
67137696,
67137700,
67137704,
67137708,
67137712,
67137716,
67137720,
67137724,
67137728,
67137732,
67137736,
67137740,
67137744,
67137748,
67137752,
67137756,
67137760,
67137764,
67137768,
67137772,
67137776,
67137780
],
"wall_s": 0.0004
},
"wall_s": 0.1251
},
"firmware": {
"name": "gsp-570.144.fwimage.bin",
"sha256": "2d1bb5c60b208cfd115f015b17dd04a6fece05fd2c0dcba3625d9d48cce3ceea"
},
"lenient_repeat": {
"disassembly": [
"0x84009000: 0010029b addiw t0,zero,1",
"0x84009004: 03129293 slli t0,t0,49",
"0x84009008: 00128293 addi t0,t0,1",
"0x8400900c: 00c29293 slli t0,t0,12",
"0x84009010: a0028293 addi t0,t0,-1536",
"0x84009014: 0002a283 lw t0,0(t0)",
"0x84009018: 0142d293 srli t0,t0,20",
"0x8400901c: 1ff2f293 andi t0,t0,511"
],
"entry_regs_zero": false,
"first_touch_fw_pc": 67145748,
"first_touch_matches_qemu": true,
"first_unknown_mmio": {
"addr": 2305843009213696512,
"pc": 2214629396,
"rw": "r",
"size": 4
},
"hook_stops": [
{
"label": "first_touch_pc",
"pc": 2214629396,
"pc_fw": 67145748,
"t0": 2305843009213696512,
"t1": 0,
"t2": 0
},
{
"label": "halt",
"pc": 2214629488,
"pc_fw": 67145840,
"t0": 0,
"t1": 359,
"t2": 368
}
],
"instructions": 25,
"session": "harness/re_demo/sessions/native-lenient-repeat",
"session_hashes": {
"events.jsonl": "2cd28b4da009447d70505cfbba59e9c1bf8bd277e3a7ea696e2690f54f66f756",
"session.json": "fe21ed52c05436d0f7886dfeb0886ec1a11b25678e4d827db3b9e4009d2187e4",
"summary.md": "357d95a664e33128a2a48da7ecfc058bdbbea56fae130557593fd59ff2efa597"
},
"snapshot_bytes": 120,
"stop_pc": 2214629488,
"stop_pc_fw": 67145840,
"trace_exec_count": 25,
"trace_path_fw": [
67145728,
67145732,
67145736,
67145740,
67145744,
67145748,
67145752,
67145756,
67145760,
67145764,
67145768,
67145772,
67145776,
67145780,
67145784,
67145788,
67145792,
67145796,
67145800,
67145804,
67145808,
67145812,
67145824,
67145828,
67145840
],
"wall_s": 0.0005
},
"lenient_repeat_hashes": {
"events.jsonl": "2cd28b4da009447d70505cfbba59e9c1bf8bd277e3a7ea696e2690f54f66f756",
"session.json": "fe21ed52c05436d0f7886dfeb0886ec1a11b25678e4d827db3b9e4009d2187e4",
"summary.md": "357d95a664e33128a2a48da7ecfc058bdbbea56fae130557593fd59ff2efa597"
},
"not_verified": [
"the modeled chip-ID value is an assumption (the QEMU baseline faults before reading it); only the field position and the compared IDs are firmware evidence",
"no timing/cycle claim: cycles are modeled (L2 not modelled, docs/06) and none are used in this answer",
"L3 device environment is absent: the register's on-silicon semantics are inferred from firmware comparisons, not from a device model",
"load-at-link-address and absolute-immediate relocation behaviour are not implemented; the B1 candidate fault is a relocation artifact of this harness",
"watchpoints are not exercised on this path: the bootstrap performs no RAM data access before the fault (RAM watchpoints are exercised by harness/sim_qemu_line.py on the demo firmware)",
"no hardware, GPU, mdev, module, guest or network involvement by design"
],
"qemu_reference_first_fault": {
"access_addr": 2305843009213696512,
"cause": 5,
"desc": "load access fault",
"firmware_vaddr": 67145748,
"rw": "read",
"size": 4
},
"ran": true,
"rerun": {
"command": "python3 harness/re_demo.py",
"cwd": "open-iov/debug/risc-v-gsp-rm-vm"
},
"rerun_notes": [
"thresholds live in harness/re_demo.py (FROZEN_THRESHOLDS) and are not moved after the run",
"the QEMU baseline needs qemu-system-riscv64; without it the emulator columns still reproduce and the baseline is marked unverified",
"sessions are under harness/re_demo/sessions/ (hash-stamped); the report regenerates with the same command"
],
"scenario": "What happens on the real GSP image between entry and the first fault/milestone, and what does the state tell us about boot?",
"schema": "greeneye-re-demo/1",
"script": "harness/re_demo.py",
"threshold_checks": {
"answers_complete": true,
"baseline_beat": true,
"deterministic_lenient_runs": true,
"emulator_wall_s": true,
"milestone_past_qemu": true,
"pass": true
},
"thresholds": {
"answers_required": 5,
"emulator_wall_s_max": 120.0,
"frozen_on": "2026-10-03",
"identical_lenient_runs": 2,
"manual_static_estimate_s": 600.0,
"milestone_past_qemu": true
}
}
|
