linux-kernel - [PATCH 1/5] powerpc64/bpf: jit support for 32bit offset jmp instruction

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Date: Fri, 17 May 2024 09:56:46 +0200
From: Artem Savkov <asavkov@...hat.com>
To: Michael Ellerman <mpe@...erman.id.au>,
	Nicholas Piggin <npiggin@...il.com>,
	Christophe Leroy <christophe.leroy@...roup.eu>,
	"Naveen N. Rao" <naveen.n.rao@...ux.ibm.com>,
	linuxppc-dev@...ts.ozlabs.org
Cc: Alexei Starovoitov <ast@...nel.org>,
	Daniel Borkmann <daniel@...earbox.net>,
	Andrii Nakryiko <andrii@...nel.org>,
	bpf@...r.kernel.org,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Artem Savkov <asavkov@...hat.com>
Subject: [PATCH 1/5] powerpc64/bpf: jit support for 32bit offset jmp instruction

Add jit support for JMP32_JA instruction. Tested using test_bpf module.

Signed-off-by: Artem Savkov <asavkov@...hat.com>
---
 arch/powerpc/net/bpf_jit_comp64.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/powerpc/net/bpf_jit_comp64.c b/arch/powerpc/net/bpf_jit_comp64.c
index 8afc14a4a1258..3071205782b15 100644
--- a/arch/powerpc/net/bpf_jit_comp64.c
+++ b/arch/powerpc/net/bpf_jit_comp64.c
@@ -1053,6 +1053,9 @@ int bpf_jit_build_body(struct bpf_prog *fp, u32 *image, u32 *fimage, struct code
 		case BPF_JMP | BPF_JA:
 			PPC_JMP(addrs[i + 1 + off]);
 			break;
+		case BPF_JMP32 | BPF_JA:
+			PPC_JMP(addrs[i + 1 + imm]);
+			break;
 
 		case BPF_JMP | BPF_JGT | BPF_K:
 		case BPF_JMP | BPF_JGT | BPF_X:
-- 
2.45.0