From patchwork Fri Nov 22 07:52:16 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Janosch Frank X-Patchwork-Id: 1199341 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com 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 ozlabs.org (Postfix) with ESMTPS id 47K86y0xgHz9sPT for ; Fri, 22 Nov 2019 19:02:50 +1100 (AEDT) Received: from localhost ([::1]:48114 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iY3tv-000497-1j for incoming@patchwork.ozlabs.org; Fri, 22 Nov 2019 03:02:47 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:40366) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iY3kR-0002Nq-AM for qemu-devel@nongnu.org; Fri, 22 Nov 2019 02:53:00 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iY3kP-0004Qb-P2 for qemu-devel@nongnu.org; Fri, 22 Nov 2019 02:52:59 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:25250 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 1iY3kP-0004QP-KK for qemu-devel@nongnu.org; Fri, 22 Nov 2019 02:52:57 -0500 Received: from pps.filterd (m0098416.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id xAM7l6Iv034926 for ; Fri, 22 Nov 2019 02:52:57 -0500 Received: from e06smtp02.uk.ibm.com (e06smtp02.uk.ibm.com [195.75.94.98]) by mx0b-001b2d01.pphosted.com with ESMTP id 2wdfxvvfpu-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Fri, 22 Nov 2019 02:52:57 -0500 Received: from localhost by e06smtp02.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 07:52:52 -0000 Received: from d06av25.portsmouth.uk.ibm.com (d06av25.portsmouth.uk.ibm.com [9.149.105.61]) by b06avi18626390.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id xAM7qCfm44499318 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 22 Nov 2019 07:52:12 GMT Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 997D111C05C; Fri, 22 Nov 2019 07:52:50 +0000 (GMT) Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 86E7411C04A; Fri, 22 Nov 2019 07:52:48 +0000 (GMT) Received: from localhost.localdomain (unknown [9.145.41.23]) by d06av25.portsmouth.uk.ibm.com (Postfix) with ESMTP; Fri, 22 Nov 2019 07:52:48 +0000 (GMT) From: Janosch Frank To: qemu-devel@nongnu.org Subject: [PATCH 2/4] s390x: Cleanup cpu resets Date: Fri, 22 Nov 2019 02:52:16 -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: 19112207-0008-0000-0000-0000033605BC X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19112207-0009-0000-0000-00004A5531FF Message-Id: <20191122075218.23935-3-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 clxscore=1015 impostorscore=0 mlxlogscore=999 malwarescore=0 suspectscore=1 mlxscore=0 phishscore=0 spamscore=0 priorityscore=1501 bulkscore=0 adultscore=0 lowpriorityscore=0 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+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Let's move the resets into one function and switch by type, so we can use fallthroughs for shared reset actions. Signed-off-by: Janosch Frank --- target/s390x/cpu.c | 110 ++++++++++++++++++++------------------------- 1 file changed, 48 insertions(+), 62 deletions(-) diff --git a/target/s390x/cpu.c b/target/s390x/cpu.c index 3abe7e80fd..556afecbc1 100644 --- a/target/s390x/cpu.c +++ b/target/s390x/cpu.c @@ -82,67 +82,52 @@ static void s390_cpu_load_normal(CPUState *s) } #endif -/* S390CPUClass::cpu_reset() */ -static void s390_cpu_reset(CPUState *s) +typedef enum cpu_reset_type { + S390_CPU_RESET_NORMAL, + S390_CPU_RESET_INITIAL, + S390_CPU_RESET_CLEAR, +} cpu_reset_type; + +static void s390_cpu_reset(CPUState *s, cpu_reset_type type) { S390CPU *cpu = S390_CPU(s); S390CPUClass *scc = S390_CPU_GET_CLASS(cpu); CPUS390XState *env = &cpu->env; - env->pfault_token = -1UL; - env->bpbc = false; scc->parent_reset(s); cpu->env.sigp_order = 0; s390_cpu_set_state(S390_CPU_STATE_STOPPED, cpu); -} -/* S390CPUClass::initial_reset() */ -static void s390_cpu_initial_reset(CPUState *s) -{ - S390CPU *cpu = S390_CPU(s); - CPUS390XState *env = &cpu->env; + /* Set initial values after clearing */ + switch (type) { + case S390_CPU_RESET_CLEAR: + memset(env, 0, offsetof(CPUS390XState, start_initial_reset_fields)); + /* Fallthrough */ + case S390_CPU_RESET_INITIAL: + memset(&env->start_initial_reset_fields, 0, + offsetof(CPUS390XState, end_reset_fields) - + offsetof(CPUS390XState, start_initial_reset_fields)); + /* architectured initial values for CR 0 and 14 */ + env->cregs[0] = CR0_RESET; + env->cregs[14] = CR14_RESET; - s390_cpu_reset(s); - /* initial reset does not clear everything! */ - memset(&env->start_initial_reset_fields, 0, - offsetof(CPUS390XState, end_reset_fields) - - offsetof(CPUS390XState, start_initial_reset_fields)); - - /* architectured initial values for CR 0 and 14 */ - env->cregs[0] = CR0_RESET; - env->cregs[14] = CR14_RESET; - - /* architectured initial value for Breaking-Event-Address register */ - env->gbea = 1; - - env->pfault_token = -1UL; - - /* tininess for underflow is detected before rounding */ - set_float_detect_tininess(float_tininess_before_rounding, - &env->fpu_status); + /* architectured initial value for Breaking-Event-Address register */ + env->gbea = 1; + /* tininess for underflow is detected before rounding */ + set_float_detect_tininess(float_tininess_before_rounding, + &env->fpu_status); + /* Fallthrough */ + case S390_CPU_RESET_NORMAL: + env->pfault_token = -1UL; + env->bpbc = false; + break; + } /* Reset state inside the kernel that we cannot access yet from QEMU. */ - if (kvm_enabled()) { - kvm_s390_reset_vcpu(cpu); + if (kvm_enabled() && (type == S390_CPU_RESET_CLEAR || + type == S390_CPU_RESET_INITIAL)) { + kvm_s390_reset_vcpu(cpu); } -} - -/* CPUClass:reset() */ -static void s390_cpu_full_reset(CPUState *s) -{ - S390CPU *cpu = S390_CPU(s); - S390CPUClass *scc = S390_CPU_GET_CLASS(cpu); - CPUS390XState *env = &cpu->env; - - scc->parent_reset(s); - cpu->env.sigp_order = 0; - s390_cpu_set_state(S390_CPU_STATE_STOPPED, cpu); - - memset(env, 0, offsetof(CPUS390XState, end_reset_fields)); - - /* architectured initial values for CR 0 and 14 */ - env->cregs[0] = CR0_RESET; - env->cregs[14] = CR14_RESET; #if defined(CONFIG_USER_ONLY) /* user mode should always be allowed to use the full FPU */ @@ -151,20 +136,21 @@ static void s390_cpu_full_reset(CPUState *s) env->cregs[0] |= CR0_VECTOR; } #endif +} - /* architectured initial value for Breaking-Event-Address register */ - env->gbea = 1; +static void s390_cpu_reset_normal(CPUState *s) +{ + return s390_cpu_reset(s, S390_CPU_RESET_NORMAL); +} - env->pfault_token = -1UL; +static void s390_cpu_reset_initial(CPUState *s) +{ + return s390_cpu_reset(s, S390_CPU_RESET_INITIAL); +} - /* tininess for underflow is detected before rounding */ - set_float_detect_tininess(float_tininess_before_rounding, - &env->fpu_status); - - /* Reset state inside the kernel that we cannot access yet from QEMU. */ - if (kvm_enabled()) { - kvm_s390_reset_vcpu(cpu); - } +static void s390_cpu_reset_clear(CPUState *s) +{ + return s390_cpu_reset(s, S390_CPU_RESET_CLEAR); } #if !defined(CONFIG_USER_ONLY) @@ -473,9 +459,9 @@ static void s390_cpu_class_init(ObjectClass *oc, void *data) #if !defined(CONFIG_USER_ONLY) scc->load_normal = s390_cpu_load_normal; #endif - scc->cpu_reset = s390_cpu_reset; - scc->initial_cpu_reset = s390_cpu_initial_reset; - cc->reset = s390_cpu_full_reset; + scc->cpu_reset = s390_cpu_reset_normal; + scc->initial_cpu_reset = s390_cpu_reset_initial; + cc->reset = s390_cpu_reset_clear; cc->class_by_name = s390_cpu_class_by_name, cc->has_work = s390_cpu_has_work; #ifdef CONFIG_TCG