diff mbox series

[bpf-next,1/2] bpf, arm64: Enable the inline of bpf_kptr_xchg()

Message ID 20240119102529.99581-2-houtao@huaweicloud.com (mailing list archive)
State Accepted
Commit 18a45f12d746c06b7361b0cce59cf8e8b9e38da6
Delegated to: BPF
Headers show
Series Enable the inline of kptr_xchg for arm64 | expand

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bpf/vmtest-bpf-next-PR success PR summary
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Commit Message

Hou Tao Jan. 19, 2024, 10:25 a.m. UTC 
From: Hou Tao <houtao1@huawei.com>

ARM64 bpf jit satisfies the following two conditions:
1) support BPF_XCHG() on pointer-sized word.
2) the implementation of xchg is the same as atomic_xchg() on
   pointer-sized words. Both of these two functions use arch_xchg() to
   implement the exchange.

So enable the inline of bpf_kptr_xchg() for arm64 bpf jit.

Signed-off-by: Hou Tao <houtao1@huawei.com>
---
 arch/arm64/net/bpf_jit_comp.c | 5 +++++
 1 file changed, 5 insertions(+)
diff mbox series

Patch

diff --git a/arch/arm64/net/bpf_jit_comp.c b/arch/arm64/net/bpf_jit_comp.c
index 8955da5c47cf7..cfd5434de4832 100644
--- a/arch/arm64/net/bpf_jit_comp.c
+++ b/arch/arm64/net/bpf_jit_comp.c
@@ -2305,3 +2305,8 @@  int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type poke_type,
 
 	return ret;
 }
+
+bool bpf_jit_supports_ptr_xchg(void)
+{
+	return true;
+}