diff options
| author | Arthur Hanson Rasmusson <arthur@vgpu.io> | 2026-10-15 17:51:17 -0400 |
|---|---|---|
| committer | Arthur Hanson Rasmusson <arthur@vgpu.io> | 2026-10-15 17:51:17 -0400 |
| commit | 54dc6c8cb980aecef1885d5622ca5fd869d7243f (patch) | |
| tree | 6fa3eb019102021b3fe6be46ee83c7b31d21516d /kernel/gsp_phys_gpu.h | |
| parent | ecfb1278086f98161402f93bca8d3df602fbcb45 (diff) | |
| download | open-iov-54dc6c8cb980aecef1885d5622ca5fd869d7243f.tar.gz open-iov-54dc6c8cb980aecef1885d5622ca5fd869d7243f.zip | |
vgsp-gr: B-2 planted 64 MiB data-bounce region for large GR operands
Replace the 205-page / 68-pages-per-pointer GR operand window with a
boot-planted 16384-page (64 MiB) region at VA 0x0a000000 (PD0 80..111):
one dual PD0 entry per 2 MB window backed by one fresh 4 KB PT page,
every leaf PTE written at stage 3 before any engine fetch (the GMMU has
no PTE invalidate, so no leaf is rewritten at runtime). The 208-page
window, mail slot 206 and marker 207 stay as-is (mail injection and
copy diagnostics unchanged) but carry no operand data when the grown
region is on.
Sema service: reloc base and page cap derive from the shared header
constants; per-pointer span becomes a 4096-page runaway guard; a total
cap hit is fail-closed (launch stalled for the bounded hold, loud
CAP-HIT log, no silent truncation); the launch's own param/bank pages
are skipped as data candidates (budget hygiene). Copy-in, copy-out,
retirement wait and the window diagnostic index the active region
through one helper/chunk selector; checksum and dedup scratch move off
the kernel stack.
gsp_phys_gr_data_region=0 (insmod, boot-fixed) flips the whole path
back to the legacy 205-page window for A/B trialing.
Diffstat (limited to 'kernel/gsp_phys_gpu.h')
| -rw-r--r-- | kernel/gsp_phys_gpu.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/gsp_phys_gpu.h b/kernel/gsp_phys_gpu.h index 73b0822..84b56d6 100644 --- a/kernel/gsp_phys_gpu.h +++ b/kernel/gsp_phys_gpu.h @@ -352,6 +352,10 @@ int gsp_phys_rmcall_gr_mail_patch_value(void); /* m106: pre-install the data PT window pool in stage 3. */ int gsp_phys_rmcall_gr_data_prewin_value(void); +/* B-2: use the grown 64 MiB boot-fixed data-bounce region (default 1; 0 = + * legacy 205-page window). Read by the stage-3 plant and the SVC fill. */ +int gsp_phys_gr_data_region_value(void); + /* m113: re-register the VAS page directory after planting data. */ int gsp_phys_rmcall_gr_recommit_value(void); |