Commit 69065aa1 authored Jan 30, 2024 by Pu Lehui Committed by Daniel Borkmann Feb 01, 2024

riscv, bpf: Enable inline bpf_kptr_xchg() for RV64

RV64 JIT supports 64-bit BPF_XCHG atomic instructions. At the same time,
the underlying implementation of xchg() and atomic64_xchg() in RV64 both
are raw_xchg() that supported 64-bit. Therefore inline bpf_kptr_xchg()
will have equivalent semantics. Let's inline it for better performance.

Signed-off-by: Pu Lehui <pulehui@huawei.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Björn Töpel <bjorn@kernel.org>
Link: https://lore.kernel.org/bpf/20240130124659.670321-2-pulehui@huaweicloud.com

parent 088a464e

arch/riscv/net/bpf_jit_comp64.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -1806,3 +1806,8 @@ bool bpf_jit_supports_kfunc_call(void)
		{
		return true;
		}

		bool bpf_jit_supports_ptr_xchg(void)
		{
		return true;
		}