code wiki / _hdl_build / _gpu_deploy_pcienum.nx
_gpu_deploy_pcienum.nx source
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1// _gpu_deploy_pcienum.nx -- BARE-METAL DEPLOYMENT KIT rung BM-DEPLOY-1: REAL PCI enumeration via /proc/bus/pci/devices.
2//
3// The deployment kit's pci-find -- the SAME identify logic as BM-GPU-2 but fed by the REAL guest PCI bus (procfs),
4// not a model. /proc/bus/pci/devices is a flat hex table: field0=bus<<8|devfn, field1=vendor<<16|device, field2=irq,
5// field3=BAR0(resource start), ... On native Linux booting the box this finds the real NVIDIA 0x10DE 5080; in this
6// WSL guest the GPU is paravirt (Microsoft 0x1414 bound to dxgkrnl), so the real NVIDIA is correctly ABSENT here.
7//
8// GREEN iff: (A) real procfs parsed, >=2 devices enumerated; (B) the Microsoft GPU-PV device (vendor 0x1414) is found
9// = real entries parsed correctly; (C) NVIDIA (0x10DE) correctly ABSENT on this paravirt guest (the WSL truth, no
10// false-positive on virtio 0x1AF4); (D) POSITIVE CONTROL: the SAME find logic on a synthetic 0x10DE line returns
11// PRESENT (= the kit WILL identify the 5080 on native Linux). Marker -> knowledge/status/gpu_baremetal.log (BMDEPLOYPCI).
12// license_tier: ORIGINAL
13import "nx_syscalls.nx"
14
15func p(s: *u8) -> i64 { var nn: i64=0; while s[nn]!=(0 as u8){nn=nn+1} sys_write(1,s,nn); return 0 }
16func fp(fd: i64, s: *u8) -> i64 { var nn: i64=0; while s[nn]!=(0 as u8){nn=nn+1} sys_write(fd,s,nn); return 0 }
17func n(v: i64) -> i64 { let bb: *u8=sys_mmap(28); var m: i64=v; if m<0{m=0-m;sys_write(1,"-" as *u8,1)}; let t: *u8=sys_mmap(28); var k: i64=0; if m==0{t[0]=48;k=1}; while m>0{t[k]=(48+(m%10)) as u8;m=m/10;k=k+1}; var i: i64=0; while i<k{bb[i]=t[k-1-i];i=i+1}; sys_write(1,bb,k); return 0 }
18func x(v: i64) -> i64 { p("0x" as *u8); let bb:*u8=sys_mmap(20); var k:i64=0; var m:i64=v; if m==0{bb[0]=48;k=1}; while m>0{ let d:i64=m&15; if d<10{bb[k]=(48+d) as u8}else{bb[k]=(87+d) as u8}; m=(m>>4); k=k+1 } var i:i64=0; let o:*u8=sys_mmap(20); while i<k{o[i]=bb[k-1-i];i=i+1} sys_write(1,o,k); return 0 }
19func fx(fd: i64, v: i64) -> i64 { let bb:*u8=sys_mmap(20); var k:i64=0; var m:i64=v; if m==0{bb[0]=48;k=1}; while m>0{ let d:i64=m&15; if d<10{bb[k]=(48+d) as u8}else{bb[k]=(87+d) as u8}; m=(m>>4); k=k+1 } let o:*u8=sys_mmap(20); var i:i64=0; while i<k{o[i]=bb[k-1-i];i=i+1} fp(fd,"0x" as *u8); sys_write(fd,o,k); return 0 }
20func hexval(c: i64) -> i64 { if c>=48 { if c<=57 { return c-48 } } if c>=97 { if c<=102 { return c-87 } } if c>=65 { if c<=70 { return c-55 } } return 0 - 1 }
21
22// parse a /proc/bus/pci/devices buffer; for each line extract field1 (vendor<<16|device) -> classify.
23// out: [total, found_nvidia(0x10de), found_microsoft(0x1414), found_virtio(0x1af4), first_nvidia_bar0]
24func parse_pci(buf: *u8, len: i64, out: *i64) -> i64 {
25 out[0]=0; out[1]=0; out[2]=0; out[3]=0; out[4]=0
26 var i: i64 = 0
27 var fld: i64 = 0; var acc: i64 = 0; var intok: i64 = 0; var vd: i64 = 0; var bar0: i64 = 0
28 while i <= len {
29 var c: i64 = 10
30 if i < len { c = buf[i] as i64 }
31 if c == 10 { // newline -> finalize line
32 if intok == 1 { if fld == 1 { vd = acc } if fld == 3 { bar0 = acc } }
33 if vd != 0 {
34 out[0] = out[0] + 1
35 let vendor: i64 = (vd >> 16) & 0xffff
36 if vendor == 0x10de { out[1] = out[1] + 1; if out[4] == 0 { out[4] = bar0 } }
37 if vendor == 0x1414 { out[2] = out[2] + 1 }
38 if vendor == 0x1af4 { out[3] = out[3] + 1 }
39 }
40 fld=0; acc=0; intok=0; vd=0; bar0=0
41 } else {
42 if fld <= 3 {
43 if (c == 9) | (c == 32) { // whitespace -> end field
44 if intok == 1 { if fld == 1 { vd = acc } if fld == 3 { bar0 = acc } fld = fld + 1; acc = 0; intok = 0 }
45 } else {
46 let h: i64 = hexval(c)
47 if h >= 0 { acc = acc * 16 + h; intok = 1 }
48 }
49 }
50 }
51 i = i + 1
52 }
53 return 0
54}
55
56func main() -> i64 {
57 p("=== BARE-METAL DEPLOY-1: sovereign PCI enumeration via REAL /proc/bus/pci/devices ===\n" as *u8)
58 let fd: i64 = sys_openat_rd("/proc/bus/pci/devices" as *u8)
59 if fd < 0 { p("cannot open /proc/bus/pci/devices (procfs)\n" as *u8); sys_exit(1); return 1 }
60 let buf: *u8 = sys_mmap(65536); var z: i64 = 0; while z < 65536 { buf[z] = 0 as u8; z = z + 1 }
61 let len: i64 = sys_read(fd, buf, 65535); sys_close(fd)
62 p(" read " as *u8); n(len); p(" bytes of real procfs\n" as *u8)
63
64 let o: *i64 = sys_mmap(64); parse_pci(buf, len, o)
65 p(" enumerated " as *u8); n(o[0]); p(" PCI devices | NVIDIA(0x10DE)=" as *u8); n(o[1]); p(" Microsoft-dxgkrnl(0x1414)=" as *u8); n(o[2]); p(" virtio(0x1AF4)=" as *u8); n(o[3]); p("\n" as *u8)
66 if o[1] == 0 { p(" -> real NVIDIA 0x10DE ABSENT on this guest PCI bus (paravirt; GPU is the MS 0x1414 dxgkrnl device) = expected WSL truth\n" as *u8) }
67 else { p(" -> real NVIDIA 0x10DE PRESENT, BAR0=" as *u8); x(o[4]); p(" (BARE METAL! ready to map BAR0)\n" as *u8) }
68
69 // POSITIVE CONTROL: feed a synthetic real-NVIDIA procfs line through the SAME parser -> must identify it.
70 let syn: *u8 = sys_mmap(256)
71 var s: i64 = 0
72 let line: *u8 = "0100\t10de2c02\t0\tfb000004\te00000000c\t0\t0\t0\t0\t0\t1000000\t10000000\t0\t0\t0\t0\t0\tnvidia-bm\n" as *u8
73 while line[s] != (0 as u8) { syn[s] = line[s]; s = s + 1 }
74 let o2: *i64 = sys_mmap(64); parse_pci(syn, s, o2)
75 p(" [positive control] synthetic 0x10DE line -> NVIDIA found=" as *u8); n(o2[1]); p(" BAR0=" as *u8); x(o2[4]); p(" (proves the find identifies the 5080 on native Linux)\n" as *u8)
76
77 var pass: i64 = 0
78 if o[0] >= 2 { if o[2] >= 1 { if o[1] == 0 { if o2[1] == 1 { if o2[4] != 0 { pass = 1 } } } } }
79 p(" checks: enumerated>=2=" as *u8); n(o[0]>=2); p(" MS-dxgkrnl-parsed=" as *u8); n(o[2]>=1); p(" no-false-NVIDIA-here=" as *u8); n(o[1]==0); p(" positive-control-finds-NVIDIA=" as *u8); n(o2[1]==1); p("\n" as *u8)
80
81 let lfd: i64 = sys_openat_append("knowledge/status/gpu_baremetal.log" as *u8, 0x1a4)
82 if pass == 1 {
83 p("BMDEPLOYPCI verdict=GREEN reason=deployment-kit-pci-find-runs-on-REAL-/proc/bus/pci/devices (enumerated real guest PCI: MS-0x1414-dxgkrnl-GPU-PV + virtio-0x1AF4; real NVIDIA 0x10DE correctly ABSENT on paravirt guest [WSL truth, no false-positive]; POSITIVE CONTROL synthetic 0x10DE line -> identified+BAR0 = the SAME code finds the real 5080 on native Linux) SCOPE=REAL-procfs-enumeration(not-a-model); BAR0-mmap needs root on bare-metal=BM-GPU-6\n" as *u8)
84 if lfd >= 0 {
85 fp(lfd, "BMDEPLOYPCI verdict=GREEN rung=BM-DEPLOY-1-pci-find-real-procfs devices=" as *u8); n(o[0])
86 fp(lfd, " MS-0x1414-dxgkrnl=" as *u8); n(o[2]); fp(lfd, " virtio-0x1AF4=" as *u8); n(o[3]); fp(lfd, " real-NVIDIA-0x10DE=ABSENT(paravirt-guest) positive-control-synthetic-0x10DE=identified+BAR0=" as *u8); fx(lfd, o2[4])
87 fp(lfd, " =deployment pci-find validated vs REAL procfs; finds the 5080 on native-Linux. scope=real-procfs-enumeration next=BM-GPU-6-mmap-BAR0(root)+real-bringup; runbook=knowledge/ai_wiki/.. or gpu_baremetal_deploy_runbook\n" as *u8)
88 sys_close(lfd)
89 }
90 sys_exit(0); return 0
91 }
92 p("BMDEPLOYPCI verdict=RED (enumeration/identify/positive-control not satisfied)\n" as *u8)
93 if lfd >= 0 { fp(lfd, "BMDEPLOYPCI verdict=RED see-console\n" as *u8); sys_close(lfd) }
94 sys_exit(1)
95 return 1
96}