From patchwork Thu Jan 21 09:13:10 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierre Morel X-Patchwork-Id: 12035323 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C0A4BC433E6 for ; Thu, 21 Jan 2021 09:16:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6F6D92395A for ; Thu, 21 Jan 2021 09:16:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726123AbhAUJPp (ORCPT ); Thu, 21 Jan 2021 04:15:45 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:63084 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728508AbhAUJOP (ORCPT ); Thu, 21 Jan 2021 04:14:15 -0500 Received: from pps.filterd (m0098419.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 10L92htO156301; Thu, 21 Jan 2021 04:13:20 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references; s=pp1; bh=1Jr/kjfOuL08Kj6328CD+2X9hiMaH/zoXULnI9YHL7o=; b=kf6gt8jmwa4gDfjJjej09fpqWvXkQA+wPWnv59UJibS9uYKBQGPAR5CVISRSmRza0i3D Ien4RgueoJpmz7VpHjWF6t6QO7nnYVSiPjvXs8C/U4UKY9/PnyOmWQSwL0tHugjNQakC okD/88FuIhLETUFpYoza1C7hleAWHJTUQgs/kECPm5PjYMt/fUckw3Bk45EVsjZSiw/O YKo97mqOwsRV2w6MpWDDwzE1tiWNHSsbS/bn0kucwMo7b/7Ufn5YK5Iei8GZMCtpRmaU if2y7lGMgfwQG4ZnTQk3VosmscT2NFxd3jcmAxhYBz0h69FB53+iPNDrQIgzjqo/qwPf 5A== Received: from pps.reinject (localhost [127.0.0.1]) by mx0b-001b2d01.pphosted.com with ESMTP id 3674v13yma-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 21 Jan 2021 04:13:20 -0500 Received: from m0098419.ppops.net (m0098419.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.36/8.16.0.36) with SMTP id 10L92p2j156938; Thu, 21 Jan 2021 04:13:20 -0500 Received: from ppma04ams.nl.ibm.com (63.31.33a9.ip4.static.sl-reverse.com [169.51.49.99]) by mx0b-001b2d01.pphosted.com with ESMTP id 3674v13yjj-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 21 Jan 2021 04:13:20 -0500 Received: from pps.filterd (ppma04ams.nl.ibm.com [127.0.0.1]) by ppma04ams.nl.ibm.com (8.16.0.42/8.16.0.42) with SMTP id 10L96vGf022150; Thu, 21 Jan 2021 09:13:18 GMT Received: from b06cxnps4074.portsmouth.uk.ibm.com (d06relay11.portsmouth.uk.ibm.com [9.149.109.196]) by ppma04ams.nl.ibm.com with ESMTP id 3668p0sfvg-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 21 Jan 2021 09:13:18 +0000 Received: from d06av24.portsmouth.uk.ibm.com (mk.ibm.com [9.149.105.60]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 10L9DFTn37290432 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 21 Jan 2021 09:13:15 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 36D4E42049; Thu, 21 Jan 2021 09:13:15 +0000 (GMT) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B4BA242047; Thu, 21 Jan 2021 09:13:14 +0000 (GMT) Received: from oc3016276355.ibm.com (unknown [9.145.36.14]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTP; Thu, 21 Jan 2021 09:13:14 +0000 (GMT) From: Pierre Morel To: kvm@vger.kernel.org Cc: linux-s390@vger.kernel.org, frankja@linux.ibm.com, david@redhat.com, thuth@redhat.com, cohuck@redhat.com, imbrenda@linux.ibm.com, drjones@redhat.com, pbonzini@redhat.com Subject: [kvm-unit-tests PATCH v4 1/3] s390x: pv: implement routine to share/unshare memory Date: Thu, 21 Jan 2021 10:13:10 +0100 Message-Id: <1611220392-22628-2-git-send-email-pmorel@linux.ibm.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1611220392-22628-1-git-send-email-pmorel@linux.ibm.com> References: <1611220392-22628-1-git-send-email-pmorel@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.343,18.0.737 definitions=2021-01-21_03:2021-01-20,2021-01-21 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=999 suspectscore=0 phishscore=0 mlxscore=0 priorityscore=1501 impostorscore=0 bulkscore=0 lowpriorityscore=0 clxscore=1015 malwarescore=0 adultscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2101210045 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org When communicating with the host we need to share part of the memory. Let's implement the ultravisor calls for this. Signed-off-by: Pierre Morel Suggested-by: Janosch Frank Acked-by: Cornelia Huck Acked-by: Thomas Huth --- lib/s390x/asm/uv.h | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) diff --git a/lib/s390x/asm/uv.h b/lib/s390x/asm/uv.h index 4c2fc48..8400026 100644 --- a/lib/s390x/asm/uv.h +++ b/lib/s390x/asm/uv.h @@ -71,4 +71,42 @@ static inline int uv_call(unsigned long r1, unsigned long r2) return cc; } +static inline int share(unsigned long addr, u16 cmd) +{ + struct uv_cb_share uvcb = { + .header.cmd = cmd, + .header.len = sizeof(uvcb), + .paddr = addr + }; + int cc; + + cc = uv_call(0, (u64)&uvcb); + if (!cc && uvcb.header.rc == 0x0001) + return 0; + + report_info("cc %d response code: %04x", cc, uvcb.header.rc); + return -1; +} + +/* + * Guest 2 request to the Ultravisor to make a page shared with the + * hypervisor for IO. + * + * @addr: Real or absolute address of the page to be shared + */ +static inline int uv_set_shared(unsigned long addr) +{ + return share(addr, UVC_CMD_SET_SHARED_ACCESS); +} + +/* + * Guest 2 request to the Ultravisor to make a page unshared. + * + * @addr: Real or absolute address of the page to be unshared + */ +static inline int uv_remove_shared(unsigned long addr) +{ + return share(addr, UVC_CMD_REMOVE_SHARED_ACCESS); +} + #endif