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    Subject[PATCH 5.14 079/849] bpf: Define bpf_jit_alloc_exec_limit for arm64 JIT
    Date
    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 41c23f474ea63..803e7773fa869 100644
    --- a/arch/arm64/net/bpf_jit_comp.c
    +++ b/arch/arm64/net/bpf_jit_comp.c
    @@ -1136,6 +1136,11 @@ 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


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