From patchwork Wed Mar 18 14:30:40 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Janosch Frank X-Patchwork-Id: 11445361 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 3EE9314B4 for ; Wed, 18 Mar 2020 14:36:16 +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 1EE1920770 for ; Wed, 18 Mar 2020 14:36:16 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1EE1920770 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]:51544 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jEZnr-0001AY-86 for patchwork-qemu-devel@patchwork.kernel.org; Wed, 18 Mar 2020 10:36:15 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:58517) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jEZjD-0002mD-72 for qemu-devel@nongnu.org; Wed, 18 Mar 2020 10:31:30 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1jEZjA-0001cc-Dk for qemu-devel@nongnu.org; Wed, 18 Mar 2020 10:31:27 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:57399 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 1jEZjA-0001ay-3z for qemu-devel@nongnu.org; Wed, 18 Mar 2020 10:31:24 -0400 Received: from pps.filterd (m0098420.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 02IE78c8136080 for ; Wed, 18 Mar 2020 10:31:23 -0400 Received: from e06smtp01.uk.ibm.com (e06smtp01.uk.ibm.com [195.75.94.97]) by mx0b-001b2d01.pphosted.com with ESMTP id 2yukx5kjgy-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 18 Mar 2020 10:31:23 -0400 Received: from localhost by e06smtp01.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) Wed, 18 Mar 2020 14:31:19 -0000 Received: from d06av24.portsmouth.uk.ibm.com (mk.ibm.com [9.149.105.60]) by b06cxnps3075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 02IEVJ5944433620 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 18 Mar 2020 14:31:19 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E87F142045; Wed, 18 Mar 2020 14:31:18 +0000 (GMT) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id CC8B242049; Wed, 18 Mar 2020 14:31:17 +0000 (GMT) Received: from localhost.localdomain (unknown [9.145.78.199]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 18 Mar 2020 14:31:17 +0000 (GMT) From: Janosch Frank To: qemu-devel@nongnu.org Subject: [PATCH v10 09/16] s390x: protvirt: SCLP interpretation Date: Wed, 18 Mar 2020 10:30:40 -0400 X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200318143047.2335-1-frankja@linux.ibm.com> References: <20200318143047.2335-1-frankja@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 20031814-4275-0000-0000-000003AE7993 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20031814-4276-0000-0000-000038C3A582 Message-Id: <20200318143047.2335-10-frankja@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138, 18.0.645 definitions=2020-03-18_06:2020-03-18, 2020-03-18 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 impostorscore=0 lowpriorityscore=0 clxscore=1015 phishscore=0 spamscore=0 mlxscore=0 bulkscore=0 suspectscore=1 mlxlogscore=999 priorityscore=1501 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2003180067 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+patchwork-qemu-devel=patchwork.kernel.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 Reviewed-by: Claudio Imbrenda Reviewed-by: Cornelia Huck --- hw/s390x/sclp.c | 65 ++++++++++++++++++++++++++++++++++------- include/hw/s390x/sclp.h | 2 ++ target/s390x/kvm.c | 25 ++++++++++++---- 3 files changed, 76 insertions(+), 16 deletions(-) diff --git a/hw/s390x/sclp.c b/hw/s390x/sclp.c index af0bfbc2eca74767..6486890fecea4b3c 100644 --- a/hw/s390x/sclp.c +++ b/hw/s390x/sclp.c @@ -33,6 +33,22 @@ static inline SCLPDevice *get_sclp_device(void) return sclp; } +static inline bool sclp_command_code_valid(uint32_t code) +{ + switch (code & SCLP_CMD_CODE_MASK) { + case SCLP_CMDW_READ_SCP_INFO: + case SCLP_CMDW_READ_SCP_INFO_FORCED: + case SCLP_CMDW_READ_CPU_INFO: + case SCLP_CMDW_CONFIGURE_IOA: + case SCLP_CMDW_DECONFIGURE_IOA: + case SCLP_CMD_READ_EVENT_DATA: + case SCLP_CMD_WRITE_EVENT_DATA: + case SCLP_CMD_WRITE_EVENT_MASK: + return true; + } + return false; +} + static void prepare_cpu_entries(SCLPDevice *sclp, CPUEntry *entry, int *count) { MachineState *ms = MACHINE(qdev_get_machine()); @@ -193,6 +209,43 @@ 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 number 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); + + if (!sclp_command_code_valid(code)) { + work_sccb.h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND); + goto out_write; + } + + sclp_c->execute(sclp, &work_sccb, code); +out_write: + 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(); @@ -225,17 +278,7 @@ int sclp_service_call(CPUS390XState *env, uint64_t sccb, uint32_t code) return -PGM_SPECIFICATION; } - switch (code & SCLP_CMD_CODE_MASK) { - case SCLP_CMDW_READ_SCP_INFO: - case SCLP_CMDW_READ_SCP_INFO_FORCED: - case SCLP_CMDW_READ_CPU_INFO: - case SCLP_CMDW_CONFIGURE_IOA: - case SCLP_CMDW_DECONFIGURE_IOA: - case SCLP_CMD_READ_EVENT_DATA: - case SCLP_CMD_WRITE_EVENT_DATA: - case SCLP_CMD_WRITE_EVENT_MASK: - break; - default: + if (!sclp_command_code_valid(code)) { work_sccb.h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND); goto out_write; } diff --git a/include/hw/s390x/sclp.h b/include/hw/s390x/sclp.h index cd7b24359f28deb4..822eff4396ff5dde 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 462a1d70ee78104c..6b7819d2c51a111c 100644 --- a/target/s390x/kvm.c +++ b/target/s390x/kvm.c @@ -1233,12 +1233,27 @@ 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(s390_is_pv()); + /* The notification intercepts are currently handled by KVM */ + error_report("unexpected SCLP PV notification"); + exit(1); + break; + case ICPT_PV_INSTR: + g_assert(s390_is_pv()); + sclp_service_call_protected(env, sccb, code); + /* Setting the CC is done by the Ultravisor. */ + break; + case ICPT_INSTRUCTION: + g_assert(!s390_is_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)