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riscv64: explicit Bare-mode satp switch (item 4.3.5a)

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Punch list §25 item 4.3.5a complete.

Firmware (EDK2 RISC-V) leaves Sv57 paging active at kernel entry with an
identity mapping that has at least one confirmed hole (PLIC threshold
register). Verified live before acting: satp.MODE/PPN and __kernel_start's
address confirmed identity mapping; switched to Bare mode (csrw satp, x0 +
sfence.vma) in arch_early_init(), ahead of pmm_init()/vmm_init().
Three-arch acceptance boot clean, zero exceptions; riscv64's PLIC_THRESHOLD
write now survives (PLIC driver code itself lands separately with 4.3.5b).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
This commit is contained in:
Robert Allan James
2026-08-08 11:07:29 -04:00
co-authored by Claude Sonnet 5
parent 06283e5364
commit 36965cf812
16 changed files with 73348 additions and 94 deletions
Download Patch File Download Diff File Expand all files Collapse all files
experiments/bare_metal/latest/riscv64.csv
+28 -28
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@@ -57,39 +57,39 @@ tick_number,elapsed_ns,tick_interval_ns,cache_hits_delta,bucket_hits_delta,word_
56,560000,10000,0,0,211,103,32,4096,1620,0,0,0,65536,0,0,65536,0,0
57,570000,10000,0,0,193,110,33,4096,1712,0,0,0,65536,0,0,65536,0,0
58,580000,10000,0,0,190,5,67,4096,1775,0,0,0,65536,0,0,65536,0,0
1,10000,18446744073708981616,0,0,117,4,4,4096,0,0,4895412794951728869,8,65536,0,0,65536,0,0
1,10000,18446744073708981616,0,0,117,4,4,4096,0,0,4895412794951728869,7,65536,0,0,65536,0,0
2,20000,10000,0,0,78,10,7,4096,0,0,0,9,65536,0,0,65536,0,0
3,30000,10000,0,0,101,13,7,4096,0,0,0,10,65536,0,0,65536,0,0
4,40000,10000,0,0,63,19,8,4096,0,0,0,11,65536,0,0,65536,0,0
5,50000,10000,0,0,92,25,8,4096,2,0,0,13,65536,0,0,65536,0,0
6,60000,10000,0,0,64,27,8,4096,2,0,0,14,65536,0,0,65536,0,0
7,70000,10000,0,0,228,32,8,4096,210,0,0,21,65536,0,0,65536,0,0
5,50000,10000,0,0,92,25,8,4096,2,0,0,14,65536,0,0,65536,0,0
6,60000,10000,0,0,64,27,8,4096,2,0,0,15,65536,0,0,65536,0,0
7,70000,10000,0,0,228,32,8,4096,210,0,0,22,65536,0,0,65536,0,0
8,80000,10000,0,0,256,34,9,4096,466,0,0,29,65536,0,0,65536,0,0
9,90000,10000,0,0,256,36,10,4096,722,0,0,37,65536,0,0,65536,0,0
9,90000,10000,0,0,256,36,10,4096,722,0,0,36,65536,0,0,65536,0,0
10,100000,10000,0,0,256,36,11,4096,978,0,0,44,65536,0,0,65536,0,0
11,110000,10000,0,0,256,36,11,4096,1234,0,0,51,65536,0,0,65536,0,0
12,120000,10000,0,0,256,36,12,4096,1490,0,0,59,65536,0,0,65536,0,0
12,120000,10000,0,0,256,36,12,4096,1490,0,0,58,65536,0,0,65536,0,0
13,130000,10000,0,0,256,37,12,4096,1746,0,0,66,65536,0,0,65536,0,0
14,140000,10000,0,0,230,39,12,4096,1949,0,0,73,65536,0,0,65536,0,0
15,150000,10000,0,0,256,39,13,4096,2204,0,0,81,65536,0,0,65536,0,0
16,160000,10000,0,0,256,39,14,4096,2459,0,0,88,65536,0,0,65536,0,0
17,170000,10000,0,0,256,39,15,4096,2713,0,0,96,65536,0,0,65536,0,0
18,180000,10000,0,0,256,39,15,4096,2969,0,0,103,65536,0,0,65536,0,0
19,190000,10000,0,0,256,39,16,4096,3224,0,0,113,65536,0,1,65536,0,0
20,200000,10000,0,0,256,41,17,4096,3480,0,0,121,65536,0,1,65536,0,0
21,210000,10000,0,0,256,41,17,4096,3736,0,0,129,65536,0,1,65536,0,0
22,220000,10000,0,0,256,41,18,4096,3992,0,0,136,65536,0,1,65536,0,0
23,230000,10000,0,0,256,41,19,4096,4096,0,0,144,65536,0,1,65536,0,0
24,240000,10000,0,0,256,41,20,4096,4096,0,0,151,65536,0,1,65536,0,0
25,250000,10000,0,0,256,43,20,2048,2048,0,0,159,65536,0,1,65536,0,0
26,260000,10000,0,0,256,45,21,2048,2048,0,0,166,65536,0,1,65536,0,0
27,270000,10000,0,0,256,45,22,1024,1024,0,0,174,65536,0,1,65536,0,0
28,280000,10000,0,0,256,45,23,1024,1024,0,0,181,65536,0,1,65536,0,0
29,290000,10000,0,0,256,45,24,512,512,0,0,189,65536,0,1,65536,0,0
30,300000,10000,0,0,256,45,24,512,512,0,0,197,65536,0,1,65536,0,0
31,310000,10000,0,0,256,45,25,256,256,0,0,204,65536,0,1,65536,0,0
32,320000,10000,0,0,255,45,26,256,256,0,0,211,65536,0,1,65536,0,0
33,330000,10000,0,0,256,45,27,256,256,0,0,221,65536,0,1,65536,0,0
34,340000,10000,0,0,256,45,27,256,256,0,0,228,65536,0,1,65536,0,0
35,350000,10000,0,0,256,45,28,256,256,0,0,236,65536,0,1,65536,0,0
36,360000,10000,0,0,256,45,29,256,256,0,0,244,65536,0,1,65536,0,0
15,150000,10000,0,0,256,39,13,4096,2204,0,0,80,65536,0,0,65536,0,0
16,160000,10000,0,0,256,39,14,4096,2459,0,0,87,65536,0,0,65536,0,0
17,170000,10000,0,0,256,39,15,4096,2713,0,0,94,65536,0,0,65536,0,0
18,180000,10000,0,0,256,39,15,4096,2969,0,0,102,65536,0,0,65536,0,0
19,190000,10000,0,0,256,39,16,4096,3224,0,0,111,65536,0,1,65536,0,0
20,200000,10000,0,0,256,41,17,4096,3480,0,0,119,65536,0,1,65536,0,0
21,210000,10000,0,0,256,41,17,4096,3736,0,0,126,65536,0,1,65536,0,0
22,220000,10000,0,0,256,41,18,4096,3992,0,0,133,65536,0,1,65536,0,0
23,230000,10000,0,0,256,41,19,4096,4096,0,0,141,65536,0,1,65536,0,0
24,240000,10000,0,0,256,41,20,4096,4096,0,0,148,65536,0,1,65536,0,0
25,250000,10000,0,0,256,43,20,2048,2048,0,0,156,65536,0,1,65536,0,0
26,260000,10000,0,0,256,45,21,2048,2048,0,0,163,65536,0,1,65536,0,0
27,270000,10000,0,0,256,45,22,1024,1024,0,0,170,65536,0,1,65536,0,0
28,280000,10000,0,0,256,45,23,1024,1024,0,0,178,65536,0,1,65536,0,0
29,290000,10000,0,0,256,45,24,512,512,0,0,185,65536,0,1,65536,0,0
30,300000,10000,0,0,256,45,24,512,512,0,0,193,65536,0,1,65536,0,0
31,310000,10000,0,0,256,45,25,256,256,0,0,200,65536,0,1,65536,0,0
32,320000,10000,0,0,255,45,26,256,256,0,0,207,65536,0,1,65536,0,0
33,330000,10000,0,0,256,45,27,256,256,0,0,216,65536,0,1,65536,0,0
34,340000,10000,0,0,256,45,27,256,256,0,0,224,65536,0,1,65536,0,0
35,350000,10000,0,0,256,45,28,256,256,0,0,231,65536,0,1,65536,0,0
36,360000,10000,0,0,256,45,29,256,256,0,0,239,65536,0,1,65536,0,0
1 tick_number elapsed_ns tick_interval_ns cache_hits_delta bucket_hits_delta word_executions_delta hot_word_count avg_word_heat_q48 window_width actual_window_size predicted_label_hits jitter_bits apic_ticks time_trust_q48 variance_q48 vm_call_depth_max hera_heat_q48 hermes_heat_q48 artemis_heat_q48
57 56 560000 10000 0 0 211 103 32 4096 1620 0 0 0 65536 0 0 65536 0 0
58 57 570000 10000 0 0 193 110 33 4096 1712 0 0 0 65536 0 0 65536 0 0
59 58 580000 10000 0 0 190 5 67 4096 1775 0 0 0 65536 0 0 65536 0 0
60 1 10000 18446744073708981616 0 0 117 4 4 4096 0 0 4895412794951728869 8 7 65536 0 0 65536 0 0
61 2 20000 10000 0 0 78 10 7 4096 0 0 0 9 65536 0 0 65536 0 0
62 3 30000 10000 0 0 101 13 7 4096 0 0 0 10 65536 0 0 65536 0 0
63 4 40000 10000 0 0 63 19 8 4096 0 0 0 11 65536 0 0 65536 0 0
64 5 50000 10000 0 0 92 25 8 4096 2 0 0 13 14 65536 0 0 65536 0 0
65 6 60000 10000 0 0 64 27 8 4096 2 0 0 14 15 65536 0 0 65536 0 0
66 7 70000 10000 0 0 228 32 8 4096 210 0 0 21 22 65536 0 0 65536 0 0
67 8 80000 10000 0 0 256 34 9 4096 466 0 0 29 65536 0 0 65536 0 0
68 9 90000 10000 0 0 256 36 10 4096 722 0 0 37 36 65536 0 0 65536 0 0
69 10 100000 10000 0 0 256 36 11 4096 978 0 0 44 65536 0 0 65536 0 0
70 11 110000 10000 0 0 256 36 11 4096 1234 0 0 51 65536 0 0 65536 0 0
71 12 120000 10000 0 0 256 36 12 4096 1490 0 0 59 58 65536 0 0 65536 0 0
72 13 130000 10000 0 0 256 37 12 4096 1746 0 0 66 65536 0 0 65536 0 0
73 14 140000 10000 0 0 230 39 12 4096 1949 0 0 73 65536 0 0 65536 0 0
74 15 150000 10000 0 0 256 39 13 4096 2204 0 0 81 80 65536 0 0 65536 0 0
75 16 160000 10000 0 0 256 39 14 4096 2459 0 0 88 87 65536 0 0 65536 0 0
76 17 170000 10000 0 0 256 39 15 4096 2713 0 0 96 94 65536 0 0 65536 0 0
77 18 180000 10000 0 0 256 39 15 4096 2969 0 0 103 102 65536 0 0 65536 0 0
78 19 190000 10000 0 0 256 39 16 4096 3224 0 0 113 111 65536 0 1 65536 0 0
79 20 200000 10000 0 0 256 41 17 4096 3480 0 0 121 119 65536 0 1 65536 0 0
80 21 210000 10000 0 0 256 41 17 4096 3736 0 0 129 126 65536 0 1 65536 0 0
81 22 220000 10000 0 0 256 41 18 4096 3992 0 0 136 133 65536 0 1 65536 0 0
82 23 230000 10000 0 0 256 41 19 4096 4096 0 0 144 141 65536 0 1 65536 0 0
83 24 240000 10000 0 0 256 41 20 4096 4096 0 0 151 148 65536 0 1 65536 0 0
84 25 250000 10000 0 0 256 43 20 2048 2048 0 0 159 156 65536 0 1 65536 0 0
85 26 260000 10000 0 0 256 45 21 2048 2048 0 0 166 163 65536 0 1 65536 0 0
86 27 270000 10000 0 0 256 45 22 1024 1024 0 0 174 170 65536 0 1 65536 0 0
87 28 280000 10000 0 0 256 45 23 1024 1024 0 0 181 178 65536 0 1 65536 0 0
88 29 290000 10000 0 0 256 45 24 512 512 0 0 189 185 65536 0 1 65536 0 0
89 30 300000 10000 0 0 256 45 24 512 512 0 0 197 193 65536 0 1 65536 0 0
90 31 310000 10000 0 0 256 45 25 256 256 0 0 204 200 65536 0 1 65536 0 0
91 32 320000 10000 0 0 255 45 26 256 256 0 0 211 207 65536 0 1 65536 0 0
92 33 330000 10000 0 0 256 45 27 256 256 0 0 221 216 65536 0 1 65536 0 0
93 34 340000 10000 0 0 256 45 27 256 256 0 0 228 224 65536 0 1 65536 0 0
94 35 350000 10000 0 0 256 45 28 256 256 0 0 236 231 65536 0 1 65536 0 0
95 36 360000 10000 0 0 256 45 29 256 256 0 0 244 239 65536 0 1 65536 0 0