diff options
| author | Tim Kovalenko <tim.kovalenko@proton.me> | 2026-03-09 12:34:21 -0400 |
|---|---|---|
| committer | Danilo Krummrich <dakr@kernel.org> | 2026-03-10 18:29:14 +0100 |
| commit | c7940c8bf215b9dc6211781c77ce80e76982a723 (patch) | |
| tree | 07b6cb3c956fa664f5580cf864cdcf704c1b4581 /include/linux | |
| parent | 4da879a0d3fd170a70994b73baa554c6913918b5 (diff) | |
gpu: nova-core: fix stack overflow in GSP memory allocation
The `Cmdq::new` function was allocating a `PteArray` struct on the stack
and was causing a stack overflow with 8216 bytes.
Modify the `PteArray` to calculate and write the Page Table Entries
directly into the coherent DMA buffer one-by-one. This reduces the stack
usage quite a lot.
Reported-by: Gary Guo <gary@garyguo.net>
Closes: https://rust-for-linux.zulipchat.com/#narrow/channel/509436-Nova/topic/.60Cmdq.3A.3Anew.60.20uses.20excessive.20stack.20size/near/570375549
Link: https://lore.kernel.org/rust-for-linux/CANiq72mAQxbRJZDnik3Qmd4phvFwPA01O2jwaaXRh_T+2=L-qA@mail.gmail.com/
Fixes: f38b4f105cfc ("gpu: nova-core: Create initial Gsp")
Acked-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Tim Kovalenko <tim.kovalenko@proton.me>
Link: https://patch.msgid.link/20260309-drm-rust-next-v4-4-4ef485b19a4c@proton.me
[ * Use PteArray::entry() in LogBuffer::new(),
* Add TODO comment to use IoView projections once available,
* Add PTE_ARRAY_SIZE constant to avoid duplication.
- Danilo ]
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
Diffstat (limited to 'include/linux')
0 files changed, 0 insertions, 0 deletions