| From 2418f499c0f8f3702c85d1486587305797f1cec3 Mon Sep 17 00:00:00 2001 |
| From: Sasha Levin <sashal@kernel.org> |
| Date: Thu, 14 Oct 2021 15:25:52 +0100 |
| Subject: bpf: Define bpf_jit_alloc_exec_limit for arm64 JIT |
| |
| From: Lorenz Bauer <lmb@cloudflare.com> |
| |
| [ Upstream commit 5d63ae908242f028bd10860cba98450d11c079b8 ] |
| |
| Expose the maximum amount of useable memory from the arm64 JIT. |
| |
| Signed-off-by: Lorenz Bauer <lmb@cloudflare.com> |
| Signed-off-by: Alexei Starovoitov <ast@kernel.org> |
| Link: https://lore.kernel.org/bpf/20211014142554.53120-3-lmb@cloudflare.com |
| Signed-off-by: Sasha Levin <sashal@kernel.org> |
| --- |
| 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 afc7d41347f73..a343677837c77 100644 |
| --- a/arch/arm64/net/bpf_jit_comp.c |
| +++ b/arch/arm64/net/bpf_jit_comp.c |
| @@ -996,6 +996,11 @@ out: |
| 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, |
| -- |
| 2.33.0 |
| |
