From patchwork Thu Mar 19 13:19:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Janosch Frank X-Patchwork-Id: 1258223 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 48jnpk55CMzB3x2 for ; Fri, 20 Mar 2020 00:30:37 +1100 (AEDT) Received: from localhost ([::1]:38028 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jEvFq-0000zK-QN for incoming@patchwork.ozlabs.org; Thu, 19 Mar 2020 09:30:34 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:35125) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jEv5Y-0002GZ-Iu for qemu-devel@nongnu.org; Thu, 19 Mar 2020 09:19:57 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1jEv5X-0001d8-8o for qemu-devel@nongnu.org; Thu, 19 Mar 2020 09:19:56 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:24294) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1jEv5X-0001cf-0k for qemu-devel@nongnu.org; Thu, 19 Mar 2020 09:19:55 -0400 Received: from pps.filterd (m0098394.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 02JD3pBP085925 for ; Thu, 19 Mar 2020 09:19:54 -0400 Received: from e06smtp02.uk.ibm.com (e06smtp02.uk.ibm.com [195.75.94.98]) by mx0a-001b2d01.pphosted.com with ESMTP id 2yua3w80pu-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Thu, 19 Mar 2020 09:19:53 -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) Thu, 19 Mar 2020 13:19:49 -0000 Received: from b06wcsmtp001.portsmouth.uk.ibm.com (b06wcsmtp001.portsmouth.uk.ibm.com [9.149.105.160]) by b06avi18878370.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 02JDJmAF43778330 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 19 Mar 2020 13:19:48 GMT Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 35397A405F; Thu, 19 Mar 2020 13:19:48 +0000 (GMT) Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0164FA405C; Thu, 19 Mar 2020 13:19:47 +0000 (GMT) Received: from localhost.localdomain (unknown [9.145.146.136]) by b06wcsmtp001.portsmouth.uk.ibm.com (Postfix) with ESMTP; Thu, 19 Mar 2020 13:19:46 +0000 (GMT) From: Janosch Frank To: qemu-devel@nongnu.org Subject: [PATCH v11 12/16] s390x: protvirt: Disable address checks for PV guest IO emulation Date: Thu, 19 Mar 2020 09:19:17 -0400 X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200319131921.2367-1-frankja@linux.ibm.com> References: <20200319131921.2367-1-frankja@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 20031913-0008-0000-0000-0000036002E1 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20031913-0009-0000-0000-00004A8160C2 Message-Id: <20200319131921.2367-13-frankja@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138, 18.0.645 definitions=2020-03-19_04:2020-03-19, 2020-03-19 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=1 spamscore=0 phishscore=0 priorityscore=1501 clxscore=1015 impostorscore=0 adultscore=0 malwarescore=0 bulkscore=0 mlxscore=0 mlxlogscore=804 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2003190058 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] X-Received-From: 148.163.156.1 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" IO instruction data is routed through SIDAD for protected guests, so adresses do not need to be checked, as this is kernel memory which is always available. Also the instruction data always starts at offset 0 of the SIDAD. Signed-off-by: Janosch Frank Reviewed-by: Thomas Huth Reviewed-by: David Hildenbrand Reviewed-by: Christian Borntraeger Reviewed-by: Claudio Imbrenda Reviewed-by: Cornelia Huck --- target/s390x/ioinst.c | 35 ++++++++++++++++++++++++++++------- 1 file changed, 28 insertions(+), 7 deletions(-) diff --git a/target/s390x/ioinst.c b/target/s390x/ioinst.c index 0e840cc5792afe02..8828482eec306a2b 100644 --- a/target/s390x/ioinst.c +++ b/target/s390x/ioinst.c @@ -16,6 +16,25 @@ #include "hw/s390x/ioinst.h" #include "trace.h" #include "hw/s390x/s390-pci-bus.h" +#include "hw/s390x/pv.h" + +/* All I/O instructions but chsc use the s format */ +static uint64_t get_address_from_regs(CPUS390XState *env, uint32_t ipb, + uint8_t *ar) +{ + /* + * Addresses for protected guests are all offsets into the + * satellite block which holds the IO control structures. Those + * control structures are always starting at offset 0 and are + * always aligned and accessible. So we can return 0 here which + * will pass the following address checks. + */ + if (s390_is_pv()) { + *ar = 0; + return 0; + } + return decode_basedisp_s(env, ipb, ar); +} int ioinst_disassemble_sch_ident(uint32_t value, int *m, int *cssid, int *ssid, int *schid) @@ -114,7 +133,7 @@ void ioinst_handle_msch(S390CPU *cpu, uint64_t reg1, uint32_t ipb, uintptr_t ra) CPUS390XState *env = &cpu->env; uint8_t ar; - addr = decode_basedisp_s(env, ipb, &ar); + addr = get_address_from_regs(env, ipb, &ar); if (addr & 3) { s390_program_interrupt(env, PGM_SPECIFICATION, ra); return; @@ -171,7 +190,7 @@ void ioinst_handle_ssch(S390CPU *cpu, uint64_t reg1, uint32_t ipb, uintptr_t ra) CPUS390XState *env = &cpu->env; uint8_t ar; - addr = decode_basedisp_s(env, ipb, &ar); + addr = get_address_from_regs(env, ipb, &ar); if (addr & 3) { s390_program_interrupt(env, PGM_SPECIFICATION, ra); return; @@ -203,7 +222,7 @@ void ioinst_handle_stcrw(S390CPU *cpu, uint32_t ipb, uintptr_t ra) CPUS390XState *env = &cpu->env; uint8_t ar; - addr = decode_basedisp_s(env, ipb, &ar); + addr = get_address_from_regs(env, ipb, &ar); if (addr & 3) { s390_program_interrupt(env, PGM_SPECIFICATION, ra); return; @@ -234,7 +253,7 @@ void ioinst_handle_stsch(S390CPU *cpu, uint64_t reg1, uint32_t ipb, CPUS390XState *env = &cpu->env; uint8_t ar; - addr = decode_basedisp_s(env, ipb, &ar); + addr = get_address_from_regs(env, ipb, &ar); if (addr & 3) { s390_program_interrupt(env, PGM_SPECIFICATION, ra); return; @@ -303,7 +322,7 @@ int ioinst_handle_tsch(S390CPU *cpu, uint64_t reg1, uint32_t ipb, uintptr_t ra) return -EIO; } trace_ioinst_sch_id("tsch", cssid, ssid, schid); - addr = decode_basedisp_s(env, ipb, &ar); + addr = get_address_from_regs(env, ipb, &ar); if (addr & 3) { s390_program_interrupt(env, PGM_SPECIFICATION, ra); return -EIO; @@ -601,7 +620,7 @@ void ioinst_handle_chsc(S390CPU *cpu, uint32_t ipb, uintptr_t ra) { ChscReq *req; ChscResp *res; - uint64_t addr; + uint64_t addr = 0; int reg; uint16_t len; uint16_t command; @@ -610,7 +629,9 @@ void ioinst_handle_chsc(S390CPU *cpu, uint32_t ipb, uintptr_t ra) trace_ioinst("chsc"); reg = (ipb >> 20) & 0x00f; - addr = env->regs[reg]; + if (!s390_is_pv()) { + addr = env->regs[reg]; + } /* Page boundary? */ if (addr & 0xfff) { s390_program_interrupt(env, PGM_SPECIFICATION, ra);