Re: [PATCH bpf-next 1/2] riscv: Extend patch_text_nosync() for multiple pages

Björn Töpel
2023-08-13T20:20:59Z

Puranjay Mohan <puranjay12@gmail.com> writes:

> The patch_insn_write() function currently doesn't work for multiple
> pages of instructions, therefore patch_text_nosync() will fail with a
> page fault if called with lengths spanning multiple pages.
>
> This commit extends the patch_insn_write() function to support multiple
> pages by copying at max 2 pages at a time in a loop. This implementation
> is similar to text_poke_copy() function of x86.
>
> Signed-off-by: Puranjay Mohan <puranjay12@gmail.com>

Reviewed-by: Björn Töpel <bjorn@rivosinc.com>