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| author | Arthur Hanson Rasmusson <arthur@vgpu.io> | 2026-10-19 17:13:31 -0400 |
|---|---|---|
| committer | Arthur Hanson Rasmusson <arthur@vgpu.io> | 2026-10-19 19:23:21 -0400 |
| commit | 81f099f461082a40eb2ea49cbce7f5b28caaf1ee (patch) | |
| tree | 286e44e6c40acd68d18cbd6e32fcece183623dce | |
| parent | 158cc6da93e4cece1d93eb454393396537f92ef1 (diff) | |
| download | open-iov-81f099f461082a40eb2ea49cbce7f5b28caaf1ee.tar.gz open-iov-81f099f461082a40eb2ea49cbce7f5b28caaf1ee.zip | |
vgsp: fail4 - definitive rec-content witness (data[0..2] first8 at the rec hpa)
r295 measurement: rec[0] va=0x72a93cc00000 hpa=0x119155000 first8=43100000
43108000 = floats 144.0 144.5 = a[524288..524289] - i.e. the first
A-rec's backing page already holds the +2 MB data, before copy-in.
Chained with the r285 upload witnesses (the H2D op sources read the
other buffer's chunk-2/3 data), the +2 MB phase originates on the
HOST-BUFFER side of the uploads (the pinned/staged source resolution
for the client's host buffers), not in the GMMU walk (verified
correct against the driver's own format: PD3[48:47]/PD2[46:38]/
PD1[37:29]/PD0[28:21]/PT[20:12]).
| -rw-r--r-- | kernel/gsp_phys_booter.c | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/kernel/gsp_phys_booter.c b/kernel/gsp_phys_booter.c index 101397f..3fee456 100644 --- a/kernel/gsp_phys_booter.c +++ b/kernel/gsp_phys_booter.c @@ -19610,10 +19610,28 @@ gr_page_unmapped: req->data[0].va, (u64)req->n_data << 12, (u64)dcopied << 12); - for (di = 0; di < req->n_data && di < 3; di++) - pr_info("vgsp-gr: data[%u] va=0x%llx hpa=0x%llx reloc=0x%llx\n", + for (di = 0; di < req->n_data && di < 3; di++) { + u32 w0 = 0, w1 = 0; + + /* + * fail4 definitive witness: the bytes the engine will + * read for the first recs (the rec hpa's content) + * beside the rec identity - names a +2 MB rec-page + * phase directly (client a[0..3] = 00000000 + * 0000003f 0000003f... would appear as exp[2M] + * values if the hpa points 512 pages late). + */ + if (req->data[di].hpa) { + const u32 *p = (const u32 *)__va( + req->data[di].hpa); + + w0 = p[0]; + w1 = p[1]; + } + pr_info("vgsp-gr: data[%u] va=0x%llx hpa=0x%llx reloc=0x%llx first8=%08x %08x\n", di, req->data[di].va, req->data[di].hpa, - req->data[di].reloc_va); + req->data[di].reloc_va, w0, w1); + } } /* |