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From: "Naveen N. Rao" <naveen.n.rao@linux.vnet.ibm.com>
To: Michael Ellerman <mpe@ellerman.id.au>
Cc: Daniel Borkmann <daniel@iogearbox.net>,
	Yauheni Kaliuta <yauheni.kaliuta@redhat.com>,
	bpf@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
	Alexei Starovoitov <alexei.starovoitov@gmail.com>,
	Hari Bathini <hbathini@linux.ibm.com>
Subject: [PATCH powerpc/next 10/17] powerpc/bpf: Rename PPC_BL_ABS() to PPC_BL()
Date: Mon, 14 Feb 2022 16:11:44 +0530	[thread overview]
Message-ID: <f0e57b6c7a6ee40dba645535b70da46f46e8af5e.1644834730.git.naveen.n.rao@linux.vnet.ibm.com> (raw)
In-Reply-To: <cover.1644834730.git.naveen.n.rao@linux.vnet.ibm.com>

PPC_BL_ABS() is just doing a relative branch with link. The name
suggests that it is for branching to an absolute address, which is
incorrect. Rename the macro to a more appropriate PPC_BL().

Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
---
 arch/powerpc/net/bpf_jit.h        | 6 +++---
 arch/powerpc/net/bpf_jit_comp32.c | 2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/powerpc/net/bpf_jit.h b/arch/powerpc/net/bpf_jit.h
index 5cb3efd76715a9..0832235a274983 100644
--- a/arch/powerpc/net/bpf_jit.h
+++ b/arch/powerpc/net/bpf_jit.h
@@ -34,9 +34,9 @@
 		EMIT(PPC_RAW_BRANCH(offset));				      \
 	} while (0)
 
-/* blr; (unconditional 'branch' with link) to absolute address */
-#define PPC_BL_ABS(dest)	EMIT(PPC_INST_BL |			      \
-				     (((dest) - (unsigned long)(image + ctx->idx)) & 0x03fffffc))
+/* bl (unconditional 'branch' with link) */
+#define PPC_BL(dest)	EMIT(PPC_INST_BL | (((dest) - (unsigned long)(image + ctx->idx)) & 0x03fffffc))
+
 /* "cond" here covers BO:BI fields. */
 #define PPC_BCC_SHORT(cond, dest)					      \
 	do {								      \
diff --git a/arch/powerpc/net/bpf_jit_comp32.c b/arch/powerpc/net/bpf_jit_comp32.c
index 014cf893ce90d6..cf66b25ed7c865 100644
--- a/arch/powerpc/net/bpf_jit_comp32.c
+++ b/arch/powerpc/net/bpf_jit_comp32.c
@@ -190,7 +190,7 @@ int bpf_jit_emit_func_call_rel(u32 *image, struct codegen_context *ctx, u64 func
 	s32 rel = (s32)func - (s32)(image + ctx->idx);
 
 	if (image && rel < 0x2000000 && rel >= -0x2000000) {
-		PPC_BL_ABS(func);
+		PPC_BL(func);
 		EMIT(PPC_RAW_NOP());
 		EMIT(PPC_RAW_NOP());
 		EMIT(PPC_RAW_NOP());
-- 
2.35.1


  parent reply	other threads:[~2022-02-14 10:49 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-02-14 10:41 [PATCH powerpc/next 00/17] powerpc/bpf: Some updates and cleanups Naveen N. Rao
2022-02-14 10:41 ` [PATCH powerpc/next 01/17] powerpc/bpf: Skip branch range validation during first pass Naveen N. Rao
2022-02-14 10:41 ` [PATCH powerpc/next 02/17] powerpc/bpf: Emit a single branch instruction for known short branch ranges Naveen N. Rao
2022-02-14 10:41 ` [PATCH powerpc/next 03/17] powerpc/bpf: Handle large branch ranges with BPF_EXIT Naveen N. Rao
2022-02-14 10:41 ` [PATCH powerpc/next 04/17] powerpc64/bpf: Do not save/restore LR on each call to bpf_stf_barrier() Naveen N. Rao
2022-02-14 10:41 ` [PATCH powerpc/next 05/17] powerpc64/bpf: Use r12 for constant blinding Naveen N. Rao
2022-02-14 10:41 ` [PATCH powerpc/next 06/17] powerpc64: Set PPC64_ELF_ABI_v[1|2] macros to 1 Naveen N. Rao
2022-02-14 10:41 ` [PATCH powerpc/next 07/17] powerpc64/bpf elfv2: Setup kernel TOC in r2 on entry Naveen N. Rao
2022-02-14 10:41 ` [PATCH powerpc/next 08/17] powerpc64/bpf elfv1: Do not load TOC before calling functions Naveen N. Rao
2022-02-14 10:41 ` [PATCH powerpc/next 09/17] powerpc64/bpf: Optimize instruction sequence used for function calls Naveen N. Rao
2022-02-14 10:41 ` Naveen N. Rao [this message]
2022-02-14 10:41 ` [PATCH powerpc/next 11/17] powerpc64/bpf: Convert some of the uses of PPC_BPF_[LL|STL] to PPC_BPF_[LD|STD] Naveen N. Rao
2022-02-14 10:41 ` [PATCH powerpc/next 12/17] powerpc64/bpf: Get rid of PPC_BPF_[LL|STL|STLU] macros Naveen N. Rao
2022-02-14 10:41 ` [PATCH powerpc/next 13/17] powerpc/bpf: Cleanup bpf_jit.h Naveen N. Rao
2022-02-14 10:41 ` [PATCH powerpc/next 14/17] powerpc/bpf: Move bpf_jit64.h into bpf_jit_comp64.c Naveen N. Rao
2022-02-14 10:41 ` [PATCH powerpc/next 15/17] powerpc/bpf: Use _Rn macros for GPRs Naveen N. Rao
2022-02-14 10:41 ` [PATCH powerpc/next 16/17] powerpc64/bpf: Store temp registers' bpf to ppc mapping Naveen N. Rao
2022-02-14 10:41 ` [PATCH powerpc/next 17/17] powerpc/bpf: Simplify bpf_to_ppc() and adopt it for powerpc64 Naveen N. Rao
2022-03-08 12:08 ` [PATCH powerpc/next 00/17] powerpc/bpf: Some updates and cleanups Michael Ellerman

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