2021-10-14 14:36:25

by Lorenz Bauer

Subject: [PATCH v3 1/3] bpf: define bpf_jit_alloc_exec_limit for riscv JIT

Expose the maximum amount of useable memory from the riscv JIT.

Signed-off-by: Lorenz Bauer <[email protected]>
Acked-by: Luke Nelson <[email protected]>
---
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

2021-10-18 06:16:22

by Björn Töpel

Subject: Re: [PATCH v3 1/3] bpf: define bpf_jit_alloc_exec_limit for riscv JIT

On Thu, 14 Oct 2021 at 16:26, Lorenz Bauer <[email protected]> wrote:
>
> Expose the maximum amount of useable memory from the riscv JIT.
>
> Signed-off-by: Lorenz Bauer <[email protected]>
> Acked-by: Luke Nelson <[email protected]>

Acked-by: Björn Töpel <[email protected]>

> ---
> 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
>