# Re: \[PATCH v3 1/3\] bpf: define bpf\_jit\_alloc\_exec\_limit for riscv JIT

- From: Björn Töpel \<hidden\>
- Date: 2021-10-18 06:15:16 
- List: netdev
- Page: https://ratatoskr.run/netdev/2021/10/1544929
- Thread: https://ratatoskr.run/netdev/2021/10/7782493/t.md

```text
On Thu, 14 Oct 2021 at 16:26, Lorenz Bauer [ref] wrote:
>
> Expose the maximum amount of useable memory from the riscv JIT.
>
> Signed-off-by: Lorenz Bauer <redacted>
> Acked-by: Luke Nelson <luke.r.nels@gmail.com>

Acked-by: Björn Töpel <bjorn@kernel.org>

> ---
>  arch/riscv/net/bpf_jit_core.c | 5 +++++
>  1 file changed, 5 insertions(+)
>
> diff --git a/arch/riscv/net/bpf_jit_core.c b/arch/riscv/net/bpf_jit_core.c
> index fed86f42dfbe..0fee2cbaaf53 100644
> --- a/arch/riscv/net/bpf_jit_core.c
> +++ b/arch/riscv/net/bpf_jit_core.c
> @@ -166,6 +166,11 @@ struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *prog)
>         return prog;
>  }
>
> +u64 bpf_jit_alloc_exec_limit(void)
> +{
> +       return BPF_JIT_REGION_SIZE;
> +}
> +
>  void *bpf_jit_alloc_exec(unsigned long size)
>  {
>         return __vmalloc_node_range(size, PAGE_SIZE, BPF_JIT_REGION_START,
> --
> 2.30.2
>
```