[PATCH 5.14 078/849] bpf: Define bpf_jit_alloc_exec_limit for riscv JIT

Greg Kroah-Hartman
2021-11-16T01:46:43Z

From: Lorenz Bauer <lmb@cloudflare.com>

[ 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>
---
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 5d247198c30d3..753d85bdfad07 100644
--- a/arch/riscv/net/bpf_jit_core.c
+++ b/arch/riscv/net/bpf_jit_core.c
@@ -167,6 +167,11 @@ 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