[PATCH bpf-next] riscv, bpf: Add kfunc support for RV64

[Pu Lehui <pulehui@xxxxxxxxxxxxxxx>]

As another important missing piece of RV64 JIT, kfunc allow bpf programs
call kernel functions. For now, RV64 is sufficient to enable it.

Suggested-by: Björn Töpel <bjorn@xxxxxxxxxxxx>
Signed-off-by: Pu Lehui <pulehui@xxxxxxxxxx>
---
 arch/riscv/net/bpf_jit_comp64.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/riscv/net/bpf_jit_comp64.c b/arch/riscv/net/bpf_jit_comp64.c
index f5a668736c79..a9270366dc57 100644
--- a/arch/riscv/net/bpf_jit_comp64.c
+++ b/arch/riscv/net/bpf_jit_comp64.c
@@ -1751,3 +1751,8 @@ void bpf_jit_build_epilogue(struct rv_jit_context *ctx)
 {
 	__build_epilogue(false, ctx);
 }
+
+bool bpf_jit_supports_kfunc_call(void)
+{
+	return true;
+}
-- 
2.25.1