From patchwork Thu May 12 07:45:42 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hari Bathini X-Patchwork-Id: 1629969 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=dWDu+Ol+; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=112.213.38.117; helo=lists.ozlabs.org; envelope-from=linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org; receiver=) Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by bilbo.ozlabs.org (Postfix) with ESMTPS id 4KzP4r4Gy4z9sGF for ; Thu, 12 May 2022 17:47:24 +1000 (AEST) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4KzP4r2th8z3cJg for ; Thu, 12 May 2022 17:47:24 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=dWDu+Ol+; dkim-atps=neutral X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=linux.ibm.com (client-ip=148.163.156.1; helo=mx0a-001b2d01.pphosted.com; envelope-from=hbathini@linux.ibm.com; receiver=) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=dWDu+Ol+; dkim-atps=neutral Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4KzP3t4cgjz3bWx for ; Thu, 12 May 2022 17:46:34 +1000 (AEST) Received: from pps.filterd (m0098394.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 24C7BqHD018633; Thu, 12 May 2022 07:46:11 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=OK5ob7wbXQHK8nfG5zvAbuDQPtoJ3hnL0Wvjx7idLd4=; b=dWDu+Ol+PoUEcyZoWxFu+hRUx2QjVTK0o7YLEkzIW98Q8urCNfO4BdQxnVzzICLsQedc /Fgj9r7UAV7q1XvtN3LobHKv18BgF0PAFkfXZg6grLT0Mzny85cjEiN79tLjU/FLkxt3 +RGHLsP+T3PCNU6vKj6o3LfdPLK27iSOZI1+pLOu1H/eT0bvGb9qyNWUD0/DFcUTZVTP cLVeS3gEs8jVxxkhSMq2UUwEgreOUqEo6Ry6t+bSmKyn3IttCDBSFK9e9Xeqe6Lg/ppc LOjh7vYNF1ua4RWW2gG8q7WQRdJ5CiUAISj6xhZOZkPBYbeMvYT2wDhfPX7b+6uGLls6 Pw== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3g0wmt8knf-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 12 May 2022 07:46:11 +0000 Received: from m0098394.ppops.net (m0098394.ppops.net [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 24C7H06N016992; Thu, 12 May 2022 07:46:10 GMT Received: from ppma03ams.nl.ibm.com (62.31.33a9.ip4.static.sl-reverse.com [169.51.49.98]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3g0wmt8kmk-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 12 May 2022 07:46:10 +0000 Received: from pps.filterd (ppma03ams.nl.ibm.com [127.0.0.1]) by ppma03ams.nl.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 24C7cjB5003031; Thu, 12 May 2022 07:46:08 GMT Received: from b06avi18878370.portsmouth.uk.ibm.com (b06avi18878370.portsmouth.uk.ibm.com [9.149.26.194]) by ppma03ams.nl.ibm.com with ESMTP id 3fwgd8xm72-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 12 May 2022 07:46:08 +0000 Received: from d06av23.portsmouth.uk.ibm.com (d06av23.portsmouth.uk.ibm.com [9.149.105.59]) by b06avi18878370.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 24C7jjGG31588714 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 12 May 2022 07:45:45 GMT Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id F3D5AA4055; Thu, 12 May 2022 07:46:05 +0000 (GMT) Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id CCDBAA404D; Thu, 12 May 2022 07:45:57 +0000 (GMT) Received: from hbathini-workstation.ibm.com.com (unknown [9.211.109.30]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTP; Thu, 12 May 2022 07:45:57 +0000 (GMT) From: Hari Bathini To: bpf@vger.kernel.org, linuxppc-dev Subject: [PATCH 1/5] bpf ppc64: add support for BPF_ATOMIC bitwise operations Date: Thu, 12 May 2022 13:15:42 +0530 Message-Id: <20220512074546.231616-2-hbathini@linux.ibm.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220512074546.231616-1-hbathini@linux.ibm.com> References: <20220512074546.231616-1-hbathini@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: xwHRNrstbGAF2bxHbm82rn6P-nV7keAg X-Proofpoint-GUID: 0t7HLR3O5YMIBqPJtx0U6XA9vvX4-JcP X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.858,Hydra:6.0.486,FMLib:17.11.64.514 definitions=2022-05-11_07,2022-05-12_01,2022-02-23_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 adultscore=0 priorityscore=1501 lowpriorityscore=0 bulkscore=0 mlxscore=0 phishscore=0 malwarescore=0 suspectscore=0 impostorscore=0 spamscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2202240000 definitions=main-2205120034 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Song Liu , Daniel Borkmann , John Fastabend , Alexei Starovoitov , Andrii Nakryiko , netdev@vger.kernel.org, Paul Mackerras , "Naveen N. Rao" , Yonghong Song , KP Singh , Jordan Niethe , Martin KaFai Lau Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Adding instructions for ppc64 for atomic[64]_and atomic[64]_or atomic[64]_xor Signed-off-by: Hari Bathini --- arch/powerpc/net/bpf_jit_comp64.c | 57 ++++++++++++++++--------------- 1 file changed, 29 insertions(+), 28 deletions(-) diff --git a/arch/powerpc/net/bpf_jit_comp64.c b/arch/powerpc/net/bpf_jit_comp64.c index 183a73f8fcc4..b34ed88167f0 100644 --- a/arch/powerpc/net/bpf_jit_comp64.c +++ b/arch/powerpc/net/bpf_jit_comp64.c @@ -782,41 +782,42 @@ int bpf_jit_build_body(struct bpf_prog *fp, u32 *image, struct codegen_context * * BPF_STX ATOMIC (atomic ops) */ case BPF_STX | BPF_ATOMIC | BPF_W: - if (imm != BPF_ADD) { - pr_err_ratelimited( - "eBPF filter atomic op code %02x (@%d) unsupported\n", - code, i); - return -ENOTSUPP; - } - - /* *(u32 *)(dst + off) += src */ - - /* Get EA into TMP_REG_1 */ - EMIT(PPC_RAW_ADDI(tmp1_reg, dst_reg, off)); + case BPF_STX | BPF_ATOMIC | BPF_DW: + /* Get offset into TMP_REG_1 */ + EMIT(PPC_RAW_LI(tmp1_reg, off)); tmp_idx = ctx->idx * 4; /* load value from memory into TMP_REG_2 */ - EMIT(PPC_RAW_LWARX(tmp2_reg, 0, tmp1_reg, 0)); - /* add value from src_reg into this */ - EMIT(PPC_RAW_ADD(tmp2_reg, tmp2_reg, src_reg)); - /* store result back */ - EMIT(PPC_RAW_STWCX(tmp2_reg, 0, tmp1_reg)); - /* we're done if this succeeded */ - PPC_BCC_SHORT(COND_NE, tmp_idx); - break; - case BPF_STX | BPF_ATOMIC | BPF_DW: - if (imm != BPF_ADD) { + if (size == BPF_DW) + EMIT(PPC_RAW_LDARX(tmp2_reg, tmp1_reg, dst_reg, 0)); + else + EMIT(PPC_RAW_LWARX(tmp2_reg, tmp1_reg, dst_reg, 0)); + + switch (imm) { + case BPF_ADD: + EMIT(PPC_RAW_ADD(tmp2_reg, tmp2_reg, src_reg)); + break; + case BPF_AND: + EMIT(PPC_RAW_AND(tmp2_reg, tmp2_reg, src_reg)); + break; + case BPF_OR: + EMIT(PPC_RAW_OR(tmp2_reg, tmp2_reg, src_reg)); + break; + case BPF_XOR: + EMIT(PPC_RAW_XOR(tmp2_reg, tmp2_reg, src_reg)); + break; + default: pr_err_ratelimited( "eBPF filter atomic op code %02x (@%d) unsupported\n", code, i); - return -ENOTSUPP; + return -EOPNOTSUPP; } - /* *(u64 *)(dst + off) += src */ - EMIT(PPC_RAW_ADDI(tmp1_reg, dst_reg, off)); - tmp_idx = ctx->idx * 4; - EMIT(PPC_RAW_LDARX(tmp2_reg, 0, tmp1_reg, 0)); - EMIT(PPC_RAW_ADD(tmp2_reg, tmp2_reg, src_reg)); - EMIT(PPC_RAW_STDCX(tmp2_reg, 0, tmp1_reg)); + /* store result back */ + if (size == BPF_DW) + EMIT(PPC_RAW_STDCX(tmp2_reg, tmp1_reg, dst_reg)); + else + EMIT(PPC_RAW_STWCX(tmp2_reg, tmp1_reg, dst_reg)); + /* we're done if this succeeded */ PPC_BCC_SHORT(COND_NE, tmp_idx); break;