From patchwork Tue Mar 10 08:42:45 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Janosch Frank X-Patchwork-Id: 1252030 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 48c7sn3wnHz9sPF for ; Tue, 10 Mar 2020 19:43:41 +1100 (AEDT) Received: from localhost ([::1]:55422 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jBaUF-0008SW-DZ for incoming@patchwork.ozlabs.org; Tue, 10 Mar 2020 04:43:39 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:58546) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jBaTa-0008Nq-ID for qemu-devel@nongnu.org; Tue, 10 Mar 2020 04:43:01 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1jBaTY-0004L4-ON for qemu-devel@nongnu.org; Tue, 10 Mar 2020 04:42:58 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:33506 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 1jBaTY-0004Ii-I2 for qemu-devel@nongnu.org; Tue, 10 Mar 2020 04:42:56 -0400 Received: from pps.filterd (m0098421.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 02A8eMqb080590 for ; Tue, 10 Mar 2020 04:42:55 -0400 Received: from e06smtp02.uk.ibm.com (e06smtp02.uk.ibm.com [195.75.94.98]) by mx0a-001b2d01.pphosted.com with ESMTP id 2ym8g49syt-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 10 Mar 2020 04:42:55 -0400 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) Tue, 10 Mar 2020 08:42:51 -0000 Received: from d06av24.portsmouth.uk.ibm.com (d06av24.portsmouth.uk.ibm.com [9.149.105.60]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 02A8goks45482204 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 10 Mar 2020 08:42:50 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6421D4203F; Tue, 10 Mar 2020 08:42:50 +0000 (GMT) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4C07642045; Tue, 10 Mar 2020 08:42:49 +0000 (GMT) Received: from localhost.localdomain (unknown [9.145.23.214]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTP; Tue, 10 Mar 2020 08:42:49 +0000 (GMT) From: Janosch Frank To: qemu-devel@nongnu.org Subject: [PATCH v8] s390x: protvirt: SCLP interpretation Date: Tue, 10 Mar 2020 04:42:45 -0400 X-Mailer: git-send-email 2.20.1 In-Reply-To: <6b57a6b8-f864-c5f6-f53f-1ac09e95e271@redhat.com> References: <6b57a6b8-f864-c5f6-f53f-1ac09e95e271@redhat.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 20031008-0008-0000-0000-0000035B1192 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20031008-0009-0000-0000-00004A7C53CB Message-Id: <20200310084245.30954-1-frankja@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138, 18.0.572 definitions=2020-03-10_04:2020-03-09, 2020-03-10 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 mlxscore=0 suspectscore=1 priorityscore=1501 lowpriorityscore=0 clxscore=1015 impostorscore=0 mlxlogscore=756 spamscore=0 malwarescore=0 bulkscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2001150001 definitions=main-2003100059 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] 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: borntraeger@de.ibm.com, qemu-s390x@nongnu.org, cohuck@redhat.com, david@redhat.com Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" SCLP for a protected guest is done over the SIDAD, so we need to use the s390_cpu_pv_mem_* functions to access the SIDAD instead of guest memory when reading/writing SCBs. To not confuse the sclp emulation, we set 0x4000 as the SCCB address, since the function that injects the sclp external interrupt would reject a zero sccb address. Signed-off-by: Janosch Frank Reviewed-by: David Hildenbrand --- hw/s390x/sclp.c | 30 ++++++++++++++++++++++++++++++ include/hw/s390x/sclp.h | 2 ++ target/s390x/kvm.c | 24 +++++++++++++++++++----- 3 files changed, 51 insertions(+), 5 deletions(-) diff --git a/hw/s390x/sclp.c b/hw/s390x/sclp.c index af0bfbc2ec..15dd15099c 100644 --- a/hw/s390x/sclp.c +++ b/hw/s390x/sclp.c @@ -193,6 +193,36 @@ static void sclp_execute(SCLPDevice *sclp, SCCB *sccb, uint32_t code) } } +/* +* We only need the address to have something valid for the +* service_interrupt call. +*/ +#define SCLP_PV_DUMMY_ADDR 0x4000 +int sclp_service_call_protected(CPUS390XState *env, uint64_t sccb, + uint32_t code) +{ + SCLPDevice *sclp = get_sclp_device(); + SCLPDeviceClass *sclp_c = SCLP_GET_CLASS(sclp); + SCCB work_sccb; + hwaddr sccb_len = sizeof(SCCB); + + /* + * Only a very limited amount of calls is permitted by the + * Ultravisor and we support all of them, so we don't check for + * them. All other specification exceptions are also interpreted + * by the Ultravisor and hence never cause an exit we need to + * handle. + * + * Setting the CC is also done by the Ultravisor. + */ + s390_cpu_pv_mem_read(env_archcpu(env), 0, &work_sccb, sccb_len); + sclp_c->execute(sclp, &work_sccb, code); + s390_cpu_pv_mem_write(env_archcpu(env), 0, &work_sccb, + be16_to_cpu(work_sccb.h.length)); + sclp_c->service_interrupt(sclp, SCLP_PV_DUMMY_ADDR); + return 0; +} + int sclp_service_call(CPUS390XState *env, uint64_t sccb, uint32_t code) { SCLPDevice *sclp = get_sclp_device(); diff --git a/include/hw/s390x/sclp.h b/include/hw/s390x/sclp.h index c54413b78c..c0a3faa37d 100644 --- a/include/hw/s390x/sclp.h +++ b/include/hw/s390x/sclp.h @@ -217,5 +217,7 @@ void s390_sclp_init(void); void sclp_service_interrupt(uint32_t sccb); void raise_irq_cpu_hotplug(void); int sclp_service_call(CPUS390XState *env, uint64_t sccb, uint32_t code); +int sclp_service_call_protected(CPUS390XState *env, uint64_t sccb, + uint32_t code); #endif diff --git a/target/s390x/kvm.c b/target/s390x/kvm.c index 295ed12a38..78e1b34ad5 100644 --- a/target/s390x/kvm.c +++ b/target/s390x/kvm.c @@ -1226,12 +1226,26 @@ static void kvm_sclp_service_call(S390CPU *cpu, struct kvm_run *run, sccb = env->regs[ipbh0 & 0xf]; code = env->regs[(ipbh0 & 0xf0) >> 4]; - r = sclp_service_call(env, sccb, code); - if (r < 0) { - kvm_s390_program_interrupt(cpu, -r); - return; + switch (run->s390_sieic.icptcode) { + case ICPT_PV_INSTR_NOTIFICATION: + g_assert(env->pv); + /* The notification intercepts are currently handled by KVM */ + error_report("unexpected SCLP PV notification\n"); + exit(1); + break; + case ICPT_PV_INSTR: + g_assert(env->pv); + sclp_service_call_protected(env, sccb, code); + break; + case ICPT_INSTRUCTION: + g_assert(!env->pv); + r = sclp_service_call(env, sccb, code); + if (r < 0) { + kvm_s390_program_interrupt(cpu, -r); + return; + } + setcc(cpu, r); } - setcc(cpu, r); } static int handle_b2(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1)