On Fri, Sep 24, 2021 at 10:55:40AM +0100, Lorenz Bauer wrote:
> Expose the maximum amount of useable memory from the arm64 JIT.
>
> Signed-off-by: Lorenz Bauer <lmb@xxxxxxxxxxxxxx>
> ---
> arch/arm64/net/bpf_jit_comp.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/arch/arm64/net/bpf_jit_comp.c b/arch/arm64/net/bpf_jit_comp.c
> index 41c23f474ea6..803e7773fa86 100644
> --- a/arch/arm64/net/bpf_jit_comp.c
> +++ b/arch/arm64/net/bpf_jit_comp.c
> @@ -1136,6 +1136,11 @@ 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;
> +}
Looks like this won't result in a functional change, as we happen to return
SZ_128M anyway thanks to the way in which the modules area is constructed.
But making this explicit is definitely better, so:
Acked-by: Will Deacon <will@xxxxxxxxxx>
(I'm assuming this will go via the bpf tree, but please shout if I should
take it via arm64 instead)
Will
