From: Hari Bathini <hbathini@linux.ibm.com>
Date: Tue, 12 Oct 2021 18:00:52 +0530
Subject: powerpc/ppc-opcode: introduce PPC_RAW_BRANCH() macro
Patch-mainline: v5.17-rc1
Git-commit: f15a71b3880bf07b40810644e5ac6f177c2a7c8f
References: jsc#PED-1368

Define and use PPC_RAW_BRANCH() macro instead of open coding it. This
macro is used while adding BPF_PROBE_MEM support.

Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211012123056.485795-5-hbathini@linux.ibm.com
Acked-by: Shung-Hsi Yu <shung-hsi.yu@suse.com>
---
 arch/powerpc/include/asm/ppc-opcode.h |    2 ++
 arch/powerpc/net/bpf_jit.h            |    2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

--- a/arch/powerpc/include/asm/ppc-opcode.h
+++ b/arch/powerpc/include/asm/ppc-opcode.h
@@ -566,6 +566,8 @@
 #define PPC_RAW_MTSPR(spr, d)		(0x7c0003a6 | ___PPC_RS(d) | __PPC_SPR(spr))
 #define PPC_RAW_EIEIO()			(0x7c0006ac)
 
+#define PPC_RAW_BRANCH(addr)		(PPC_INST_BRANCH | ((addr) & 0x03fffffc))
+
 /* Deal with instructions that older assemblers aren't aware of */
 #define	PPC_BCCTR_FLUSH		stringify_in_c(.long PPC_INST_BCCTR_FLUSH)
 #define	PPC_CP_ABORT		stringify_in_c(.long PPC_RAW_CP_ABORT)
--- a/arch/powerpc/net/bpf_jit.h
+++ b/arch/powerpc/net/bpf_jit.h
@@ -31,7 +31,7 @@
 			pr_err_ratelimited("Branch offset 0x%lx (@%u) out of range\n", offset, ctx->idx);			\
 			return -ERANGE;					      \
 		}							      \
-		EMIT(PPC_INST_BRANCH | (offset & 0x03fffffc));		      \
+		EMIT(PPC_RAW_BRANCH(offset));				      \
 	} while (0)
 
 /* blr; (unconditional 'branch' with link) to absolute address */