diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/gsp_phys_booter.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/kernel/gsp_phys_booter.c b/kernel/gsp_phys_booter.c index 5f57370..5206f9b 100644 --- a/kernel/gsp_phys_booter.c +++ b/kernel/gsp_phys_booter.c @@ -21029,6 +21029,26 @@ gr_page_unmapped: gsp_phys_gr_page_spot_check( (const u8 *)__va(req->data[wbi].hpa), src, req->data[wbi].va, "gr-bounce-copy-out"); + /* + * r391d post-write witness (sum=0 class): read the VA's + * landing page right after the write through the same + * path the D2H reader uses. If val8 is not first8 the + * write target and the reader's page are different + * (aperture/staleness disagreement), not a lost write. + */ + if (outwit < GSP_PHYS_GR_COPYWIT_MAX) { + u64 rpa2 = 0, rval2 = 0; + u32 rap2 = 0; + + if (gsp_sema_gr_va_snap(req->data[wbi].va, + &rpa2, &rap2, &rval2)) { + outwit++; + pr_info("vgsp-gr: OUT-PAGE-POST va=0x%llx hpa=0x%llx res_pa=0x%llx ap=%u val8=%016llx\n", + req->data[wbi].va, + req->data[wbi].hpa, rpa2, + rap2, rval2); + } + } wrote++; } if ((u64)req->n_data << 12 >= GSP_PHYS_GR_AUDIT_MIN) |