From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DE57A15E8B; Mon, 30 Dec 2024 15:50:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735573815; cv=none; b=C/BROGR6BiHbGnmlKe4x9++JYarSuAyjKyct642t0nR0cqfJ6LYMGdHX2Yo6CGQ9EwW6iImV0Pd6SvEuw6v0DhQsEbYAhUJ/uoMjlU+R6j5kpegqtmQTNgamDuAvhdreyZQYNH8kTm0djiygCA7JIfHxl5qdzH25hq7IP6xw1Hg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735573815; c=relaxed/simple; bh=Kx4WKBHFKBVJi5I9l9McHtBdE+rTADdd5AS9kyciJlI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=bve2rFtC6LMP0sCrnVAmEqYlVdEWx8VtE5VpilxnaZTnFQucHOMIAf7fj+6yRXGVrNSUvC2y8WIcZLxltN+Tpyr4qWsG/wTSENFcaLDhqVXhDmUIsdl+qR28kbEkQgA73K91pwQt5C8Bk7cjnbUSoiP5yJisww4e287JP3wPKNc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=x3IUEpkc; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="x3IUEpkc" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 49D01C4CED0; Mon, 30 Dec 2024 15:50:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1735573814; bh=Kx4WKBHFKBVJi5I9l9McHtBdE+rTADdd5AS9kyciJlI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=x3IUEpkc0OiAHKeTKSgoHD8KyWjrILrX8kVVMT485WKS24eDptPXyYYaxDvdVbA+n 8I1YJzC9ab/AKkcv/tosNuHvY0eXs89jrsY/xH+CqLAmCDSqnKVDaiwc1Ti5hoB4SY V5FGTI3k8cZ621g4kUCr1xsiGX+ZSCSHRsVYB0Ic= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Huacai Chen , Tiezhu Yang , Sasha Levin Subject: [PATCH 6.6 42/86] LoongArch: BPF: Adjust the parameter of emit_jirl() Date: Mon, 30 Dec 2024 16:42:50 +0100 Message-ID: <20241230154213.313135009@linuxfoundation.org> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20241230154211.711515682@linuxfoundation.org> References: <20241230154211.711515682@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Tiezhu Yang [ Upstream commit c1474bb0b7cff4e8481095bd0618b8f6c2f0aeb4 ] The branch instructions beq, bne, blt, bge, bltu, bgeu and jirl belong to the format reg2i16, but the sequence of oprand is different for the instruction jirl. So adjust the parameter order of emit_jirl() to make it more readable correspond with the Instruction Set Architecture manual. Here are the instruction formats: beq rj, rd, offs16 bne rj, rd, offs16 blt rj, rd, offs16 bge rj, rd, offs16 bltu rj, rd, offs16 bgeu rj, rd, offs16 jirl rd, rj, offs16 Link: https://loongson.github.io/LoongArch-Documentation/LoongArch-Vol1-EN.html#branch-instructions Suggested-by: Huacai Chen Signed-off-by: Tiezhu Yang Signed-off-by: Huacai Chen Signed-off-by: Sasha Levin --- arch/loongarch/include/asm/inst.h | 12 +++++++++++- arch/loongarch/kernel/inst.c | 2 +- arch/loongarch/net/bpf_jit.c | 6 +++--- 3 files changed, 15 insertions(+), 5 deletions(-) diff --git a/arch/loongarch/include/asm/inst.h b/arch/loongarch/include/asm/inst.h index 71e1ed4165c8..4fa53ad82efb 100644 --- a/arch/loongarch/include/asm/inst.h +++ b/arch/loongarch/include/asm/inst.h @@ -655,7 +655,17 @@ DEF_EMIT_REG2I16_FORMAT(blt, blt_op) DEF_EMIT_REG2I16_FORMAT(bge, bge_op) DEF_EMIT_REG2I16_FORMAT(bltu, bltu_op) DEF_EMIT_REG2I16_FORMAT(bgeu, bgeu_op) -DEF_EMIT_REG2I16_FORMAT(jirl, jirl_op) + +static inline void emit_jirl(union loongarch_instruction *insn, + enum loongarch_gpr rd, + enum loongarch_gpr rj, + int offset) +{ + insn->reg2i16_format.opcode = jirl_op; + insn->reg2i16_format.immediate = offset; + insn->reg2i16_format.rd = rd; + insn->reg2i16_format.rj = rj; +} #define DEF_EMIT_REG2BSTRD_FORMAT(NAME, OP) \ static inline void emit_##NAME(union loongarch_instruction *insn, \ diff --git a/arch/loongarch/kernel/inst.c b/arch/loongarch/kernel/inst.c index 3050329556d1..14d7d700bcb9 100644 --- a/arch/loongarch/kernel/inst.c +++ b/arch/loongarch/kernel/inst.c @@ -332,7 +332,7 @@ u32 larch_insn_gen_jirl(enum loongarch_gpr rd, enum loongarch_gpr rj, int imm) return INSN_BREAK; } - emit_jirl(&insn, rj, rd, imm >> 2); + emit_jirl(&insn, rd, rj, imm >> 2); return insn.word; } diff --git a/arch/loongarch/net/bpf_jit.c b/arch/loongarch/net/bpf_jit.c index 497f8b0a5f1e..6595e992fda8 100644 --- a/arch/loongarch/net/bpf_jit.c +++ b/arch/loongarch/net/bpf_jit.c @@ -181,13 +181,13 @@ static void __build_epilogue(struct jit_ctx *ctx, bool is_tail_call) /* Set return value */ emit_insn(ctx, addiw, LOONGARCH_GPR_A0, regmap[BPF_REG_0], 0); /* Return to the caller */ - emit_insn(ctx, jirl, LOONGARCH_GPR_RA, LOONGARCH_GPR_ZERO, 0); + emit_insn(ctx, jirl, LOONGARCH_GPR_ZERO, LOONGARCH_GPR_RA, 0); } else { /* * Call the next bpf prog and skip the first instruction * of TCC initialization. */ - emit_insn(ctx, jirl, LOONGARCH_GPR_T3, LOONGARCH_GPR_ZERO, 1); + emit_insn(ctx, jirl, LOONGARCH_GPR_ZERO, LOONGARCH_GPR_T3, 1); } } @@ -841,7 +841,7 @@ static int build_insn(const struct bpf_insn *insn, struct jit_ctx *ctx, bool ext return ret; move_addr(ctx, t1, func_addr); - emit_insn(ctx, jirl, t1, LOONGARCH_GPR_RA, 0); + emit_insn(ctx, jirl, LOONGARCH_GPR_RA, t1, 0); move_reg(ctx, regmap[BPF_REG_0], LOONGARCH_GPR_A0); break; -- 2.39.5