From patchwork Fri Nov 22 07:52:17 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Janosch Frank X-Patchwork-Id: 11257357 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E528E913 for ; Fri, 22 Nov 2019 08:09:06 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C5C6420637 for ; Fri, 22 Nov 2019 08:09:06 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C5C6420637 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.ibm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:48244 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iY401-000567-TW for patchwork-qemu-devel@patchwork.kernel.org; Fri, 22 Nov 2019 03:09:05 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:40388) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iY3kU-0002Sg-0s for qemu-devel@nongnu.org; Fri, 22 Nov 2019 02:53:03 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iY3kS-0004SL-QP for qemu-devel@nongnu.org; Fri, 22 Nov 2019 02:53:01 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:49272 helo=mx0a-001b2d01.pphosted.com) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iY3kS-0004SA-Lm for qemu-devel@nongnu.org; Fri, 22 Nov 2019 02:53:00 -0500 Received: from pps.filterd (m0098414.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id xAM7l6rx076891 for ; Fri, 22 Nov 2019 02:53:00 -0500 Received: from e06smtp03.uk.ibm.com (e06smtp03.uk.ibm.com [195.75.94.99]) by mx0b-001b2d01.pphosted.com with ESMTP id 2wd3fnkc3u-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Fri, 22 Nov 2019 02:53:00 -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 Nov 2019 07:52:54 -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 xAM7qrq151839006 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 22 Nov 2019 07:52:53 GMT Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id F04E911C052; Fri, 22 Nov 2019 07:52:52 +0000 (GMT) Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id EC20D11C04C; Fri, 22 Nov 2019 07:52:50 +0000 (GMT) Received: from localhost.localdomain (unknown [9.145.41.23]) by d06av25.portsmouth.uk.ibm.com (Postfix) with ESMTP; Fri, 22 Nov 2019 07:52:50 +0000 (GMT) From: Janosch Frank To: qemu-devel@nongnu.org Subject: [PATCH 3/4] s390x: Beautify diag308 handling Date: Fri, 22 Nov 2019 02:52:17 -0500 X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191122075218.23935-1-frankja@linux.ibm.com> References: <20191122075218.23935-1-frankja@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 19112207-0012-0000-0000-0000036AA873 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19112207-0013-0000-0000-000021A63F98 Message-Id: <20191122075218.23935-4-frankja@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.95,18.0.572 definitions=2019-11-21_07:2019-11-21,2019-11-21 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 mlxscore=0 phishscore=0 spamscore=0 priorityscore=1501 malwarescore=0 mlxlogscore=999 lowpriorityscore=0 clxscore=1015 adultscore=0 bulkscore=0 suspectscore=3 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1910280000 definitions=main-1911220068 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] [fuzzy] X-Received-From: 148.163.158.5 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: thuth@redhat.com, pmorel@linux.ibm.com, david@redhat.com, cohuck@redhat.com, borntraeger@de.ibm.com, qemu-s390x@nongnu.org, mihajlov@linux.ibm.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" Let's improve readability by: * Using constants for the subcodes * Moving parameter checking into a function * Removing subcode > 6 check as the default case catches that Signed-off-by: Janosch Frank Reviewed-by: Cornelia Huck Reviewed-by: Thomas Huth Reviewed-by: David Hildenbrand --- target/s390x/diag.c | 54 +++++++++++++++++++++++++++------------------ 1 file changed, 32 insertions(+), 22 deletions(-) diff --git a/target/s390x/diag.c b/target/s390x/diag.c index 53c2f81f2a..18d33c8492 100644 --- a/target/s390x/diag.c +++ b/target/s390x/diag.c @@ -53,6 +53,29 @@ int handle_diag_288(CPUS390XState *env, uint64_t r1, uint64_t r3) #define DIAG_308_RC_NO_CONF 0x0102 #define DIAG_308_RC_INVALID 0x0402 +#define DIAG308_RESET_MOD_CLR 0 +#define DIAG308_RESET_LOAD_NORM 1 +#define DIAG308_LOAD_CLEAR 3 +#define DIAG308_LOAD_NORMAL_DUMP 4 +#define DIAG308_SET 5 +#define DIAG308_STORE 6 + +static int diag308_parm_check(CPUS390XState *env, uint64_t r1, uint64_t addr, + uintptr_t ra, bool write) +{ + if ((r1 & 1) || (addr & ~TARGET_PAGE_MASK)) { + s390_program_interrupt(env, PGM_SPECIFICATION, ra); + return -1; + } + if (!address_space_access_valid(&address_space_memory, addr, + sizeof(IplParameterBlock), write, + MEMTXATTRS_UNSPECIFIED)) { + s390_program_interrupt(env, PGM_ADDRESSING, ra); + return -1; + } + return 0; +} + void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3, uintptr_t ra) { CPUState *cs = env_cpu(env); @@ -65,30 +88,24 @@ void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3, uintptr_t ra) return; } - if ((subcode & ~0x0ffffULL) || (subcode > 6)) { + if (subcode & ~0x0ffffULL) { s390_program_interrupt(env, PGM_SPECIFICATION, ra); return; } switch (subcode) { - case 0: + case DIAG308_RESET_MOD_CLR: s390_ipl_reset_request(cs, S390_RESET_MODIFIED_CLEAR); break; - case 1: + case DIAG308_RESET_LOAD_NORM: s390_ipl_reset_request(cs, S390_RESET_LOAD_NORMAL); break; - case 3: + case DIAG308_LOAD_CLEAR: + /* Well we still lack the clearing bit... */ s390_ipl_reset_request(cs, S390_RESET_REIPL); break; - case 5: - if ((r1 & 1) || (addr & 0x0fffULL)) { - s390_program_interrupt(env, PGM_SPECIFICATION, ra); - return; - } - if (!address_space_access_valid(&address_space_memory, addr, - sizeof(IplParameterBlock), false, - MEMTXATTRS_UNSPECIFIED)) { - s390_program_interrupt(env, PGM_ADDRESSING, ra); + case DIAG308_SET: + if (diag308_parm_check(env, r1, addr, ra, false)) { return; } iplb = g_new0(IplParameterBlock, 1); @@ -110,15 +127,8 @@ void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3, uintptr_t ra) out: g_free(iplb); return; - case 6: - if ((r1 & 1) || (addr & 0x0fffULL)) { - s390_program_interrupt(env, PGM_SPECIFICATION, ra); - return; - } - if (!address_space_access_valid(&address_space_memory, addr, - sizeof(IplParameterBlock), true, - MEMTXATTRS_UNSPECIFIED)) { - s390_program_interrupt(env, PGM_ADDRESSING, ra); + case DIAG308_STORE: + if (diag308_parm_check(env, r1, addr, ra, true)) { return; } iplb = s390_ipl_get_iplb();