diff options
Diffstat (limited to 'kernel/gsp_sema_service.c')
| -rw-r--r-- | kernel/gsp_sema_service.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/kernel/gsp_sema_service.c b/kernel/gsp_sema_service.c index 97cbf57..2fb4fe1 100644 --- a/kernel/gsp_sema_service.c +++ b/kernel/gsp_sema_service.c @@ -17471,6 +17471,36 @@ bool gsp_sema_write_guard(u64 va, u64 pa, u32 ap, const char *path) } /* + * r391 diagnostic (sum=0 class): the landing-table resolution of a GR data VA + * plus the first 8 bytes read through it - the exact page the D2H reader's + * ledger-first branch will use. Printed by the GR copy-out next to the write + * target, so a launch/readback disagreement is visible in one line. + */ +bool gsp_sema_gr_va_snap(u64 va, u64 *pa, u32 *ap, u64 *val8) +{ + u64 lpa = 0; + u32 lap = 0; + + if (svc_ledger_lookup(va, &lpa, &lap)) + return false; + *pa = lpa & ~(u64)(SEMA_PAGE_SIZE - 1); + *ap = lap; + *val8 = 0; + if (!svc_fwd_req.vgpu) + return true; + if (lap == SVC_APERTURE_FB) { + u8 *base = svc_fwd_req.vgpu->bars[1].vaddr; + size_t size = svc_fb_shadow_size(svc_fwd_req.vgpu); + + if (base && *pa + 8 <= size) + memcpy(val8, base + *pa, 8); + } else { + svc_read(svc_fwd_req.vgpu, *pa, val8, 8); + } + return true; +} + +/* * m144 (second-client launch-state divergence): collect device-VA-shaped * candidate pointers from the bytes the ENGINE will actually execute. * |