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 <lmb@cloudflare.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Luke Nelson <luke.r.nels@gmail.com>
Acked-by: Björn Töpel <bjorn@kernel.org>
Link: https://lore.kernel.org/bpf/20211014142554.53120-2-lmb@cloudflare.com

diff --git a/arch/riscv/net/bpf_jit_core.c b/arch/riscv/net/bpf_jit_core.c
index fed86f42dfbe56813a99bf737ec5b75f1c42380f..0fee2cbaaf533a2111c5a79d971e331bf4cfd1af 100644 (file)
--- a/arch/riscv/net/bpf_jit_core.c
+++ b/arch/riscv/net/bpf_jit_core.c
@@ -166,6 +166,11 @@ 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,