diff options
| author | Arthur Hanson Rasmusson <arthur@vgpu.io> | 2026-09-30 06:44:10 -0400 |
|---|---|---|
| committer | Arthur Hanson Rasmusson <arthur@vgpu.io> | 2026-09-30 06:44:10 -0400 |
| commit | cbacce079c12378b1d210a5713eda4f4a03696e9 (patch) | |
| tree | 08dc22532d0b14afa45790a15c3c7541fbac2a7b /kernel/main.c | |
| parent | 7cd1b17fc04cf20609ed9402cb3d466710e59eff (diff) | |
| download | open-iov-cbacce079c12378b1d210a5713eda4f4a03696e9.tar.gz open-iov-cbacce079c12378b1d210a5713eda4f4a03696e9.zip | |
sema-svc: destination-keyed copy watch (dump page-table writes)
sema_copy_dst=dumps the source bytes of every copy whose destination falls
in the given page, so the 32-byte page-directory updates the guest writes
into vidmem can be read directly and their entry encoding learned.
Diffstat (limited to 'kernel/main.c')
| -rw-r--r-- | kernel/main.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/kernel/main.c b/kernel/main.c index 7fe2d15..d6e6c9d 100644 --- a/kernel/main.c +++ b/kernel/main.c @@ -2476,6 +2476,14 @@ module_param_named(sema_copy_pat, gsp_sema_copy_pat, ullong, 0644); MODULE_PARM_DESC(sema_copy_pat, "8-byte pattern matched in copy src/dst and pushes (default 0)"); /* + * Data-path watch: dump the source bytes of copies whose destination falls + * in this address's page (up to 32 samples): + * echo 0x200000 > .../parameters/sema_copy_dst + */ +module_param_named(sema_copy_dst, gsp_sema_copy_dst, ullong, 0644); +MODULE_PARM_DESC(sema_copy_dst, "Dump source bytes of copies landing in this page (default 0)"); + +/* * Grace window (ms) an untranslatable CE entry stays pending before the * fallback acknowledges its release and consumes it. Its work must run before * the release the client synchronizes on; the translation usually lands within |