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bpf: Define bpf_jit_alloc_exec_limit for arm64 JIT

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[ 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>
This commit is contained in:
Lorenz Bauer 2021-10-14 15:25:52 +01:00 committed by Greg Kroah-Hartman
parent 0ad7f317b9
commit a3564fb7b0
1 changed files with 5 additions and 0 deletions
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arch/arm64/net/bpf_jit_comp.c
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@ -1134,6 +1134,11 @@ struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *prog)
return prog; return prog;
} }
u64 bpf_jit_alloc_exec_limit(void)
{
return BPF_JIT_REGION_SIZE;
}
void *bpf_jit_alloc_exec(unsigned long size) void *bpf_jit_alloc_exec(unsigned long size)
{ {
return __vmalloc_node_range(size, PAGE_SIZE, BPF_JIT_REGION_START, return __vmalloc_node_range(size, PAGE_SIZE, BPF_JIT_REGION_START,