From 589d0c47b3b6e4b24400a7bfc1c199421f581c37 Mon Sep 17 00:00:00 2001
From: Lorenz Bauer <lmb@cloudflare.com>
Date: Thu, 14 Oct 2021 15:25:51 +0100
Subject: [PATCH] bpf: Define bpf_jit_alloc_exec_limit for riscv JIT
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Git-commit: 8f04db78e4e36a5d4858ce841a3e9cc3d69bde36
Patch-mainline: v5.15
References: stable-5.14.19
[ Upstream commit 8f04db78e4e36a5d4858ce841a3e9cc3d69bde36 ]
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
Signed-off-by: Sasha Levin <sashal@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
arch/riscv/net/bpf_jit_core.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/riscv/net/bpf_jit_core.c b/arch/riscv/net/bpf_jit_core.c
index 5d247198c30d..753d85bdfad0 100644
--- a/arch/riscv/net/bpf_jit_core.c
+++ b/arch/riscv/net/bpf_jit_core.c
@@ -167,6 +167,11 @@ 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;
+}
+
void *bpf_jit_alloc_exec(unsigned long size)
{
return __vmalloc_node_range(size, PAGE_SIZE, BPF_JIT_REGION_START,
--
2.26.2