From patchwork Fri Feb 22 06:53:28 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sandipan Das X-Patchwork-Id: 1046592 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (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 ozlabs.org (Postfix) with ESMTPS id 445McY3b7Xz9s9L for ; Fri, 22 Feb 2019 17:58:21 +1100 (AEDT) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 445McY2Fh6zDqSx for ; Fri, 22 Feb 2019 17:58:21 +1100 (AEDT) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=linux.ibm.com (client-ip=148.163.156.1; helo=mx0a-001b2d01.pphosted.com; envelope-from=sandipan@linux.ibm.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com 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 445MWK3NCKzDqTj for ; Fri, 22 Feb 2019 17:53:49 +1100 (AEDT) Received: from pps.filterd (m0098410.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x1M6i2Fv056463 for ; Fri, 22 Feb 2019 01:53:47 -0500 Received: from e06smtp03.uk.ibm.com (e06smtp03.uk.ibm.com [195.75.94.99]) by mx0a-001b2d01.pphosted.com with ESMTP id 2qtay1jsrn-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Fri, 22 Feb 2019 01:53:46 -0500 Received: from localhost by e06smtp03.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Fri, 22 Feb 2019 06:53:41 -0000 Received: from d06av25.portsmouth.uk.ibm.com (d06av25.portsmouth.uk.ibm.com [9.149.105.61]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x1M6rdJ08978470 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Fri, 22 Feb 2019 06:53:39 GMT Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B88AE11C050; Fri, 22 Feb 2019 06:53:39 +0000 (GMT) Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 720D011C04A; Fri, 22 Feb 2019 06:53:38 +0000 (GMT) Received: from localhost.localdomain (unknown [9.195.22.129]) by d06av25.portsmouth.uk.ibm.com (Postfix) with ESMTP; Fri, 22 Feb 2019 06:53:38 +0000 (GMT) From: Sandipan Das To: sandipan@linux.ibm.com Subject: [PATCH v2 2/6] powerpc: sstep: Add support for darn instruction Date: Fri, 22 Feb 2019 12:23:28 +0530 X-Mailer: git-send-email 2.19.2 In-Reply-To: References: MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 19022206-0012-0000-0000-000002F8C4C7 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19022206-0013-0000-0000-000021305D59 Message-Id: X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-02-22_05:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1902220046 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: naveen.n.rao@linux.ibm.com, paulus@samba.org, linuxppc-dev@lists.ozlabs.org, ravi.bangoria@linux.ibm.com Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" This adds emulation support for the following integer instructions: * Deliver A Random Number (darn) As suggested by Michael, this uses a raw .long for specifying the instruction word when using inline assembly to retain compatibility with older binutils. Signed-off-by: Sandipan Das --- arch/powerpc/lib/sstep.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/arch/powerpc/lib/sstep.c b/arch/powerpc/lib/sstep.c index 67e69ebd6c00..ab575e02f9b8 100644 --- a/arch/powerpc/lib/sstep.c +++ b/arch/powerpc/lib/sstep.c @@ -1728,6 +1728,28 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs, (int) regs->gpr[rb]; goto arith_done; + case 755: /* darn */ + if (!cpu_has_feature(CPU_FTR_ARCH_300)) + return -1; + switch (ra & 0x3) { + case 0: + /* 32-bit conditioned */ + asm volatile(PPC_DARN(%0, 0) : "=r" (op->val)); + goto compute_done; + + case 1: + /* 64-bit conditioned */ + asm volatile(PPC_DARN(%0, 1) : "=r" (op->val)); + goto compute_done; + + case 2: + /* 64-bit raw */ + asm volatile(PPC_DARN(%0, 2) : "=r" (op->val)); + goto compute_done; + } + + return -1; + /* * Logical instructions