From mboxrd@z Thu Jan 1 00:00:00 1970 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 89367C433DB for ; Mon, 8 Mar 2021 14:39:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 60371651AF for ; Mon, 8 Mar 2021 14:39:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231171AbhCHOjR (ORCPT ); Mon, 8 Mar 2021 09:39:17 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:8084 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229972AbhCHOio (ORCPT ); Mon, 8 Mar 2021 09:38:44 -0500 Received: from pps.filterd (m0098410.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 128EXl6O059990; Mon, 8 Mar 2021 09:38:43 -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 : mime-version : content-transfer-encoding; s=pp1; bh=HSx195FgiL9IcU16EQHXCACraGesnFEYw1rmW8dgJCY=; b=gmFfh2Fex92FDJeNklONGn6dZHzfrLJl05sj3DoQpehYgwDigqiQnD5HYGTI87wcO3qV jwW4LaoKNfvivJAnsK4GwaaMxj130YtzSqHNO/9yNSVaesDERPigYRtG+1MAxfbfNhAt vhHOniJzZB9uu/1VxPkTkdBKmKjw8wvbUKV4cR0UDFNxbuDlRRp0zHDad3rFKSQFtW73 LQRUpikKw24fAxSza+xFpgzUsmhGgSMiNy6TWVvNgsLDC/b/7djpJKH3b+P4hnMT9bQW YNf7/SWxaapXoJli1ODWpZ5uNub3WbjWeZpNELcYzpx6er0nCkg7KNrkyepzVw389I9s 2A== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 375nqbgaxb-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 08 Mar 2021 09:38:43 -0500 Received: from m0098410.ppops.net (m0098410.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.43/8.16.0.43) with SMTP id 128EXotO060304; Mon, 8 Mar 2021 09:38:43 -0500 Received: from ppma06ams.nl.ibm.com (66.31.33a9.ip4.static.sl-reverse.com [169.51.49.102]) by mx0a-001b2d01.pphosted.com with ESMTP id 375nqbgaw9-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 08 Mar 2021 09:38:43 -0500 Received: from pps.filterd (ppma06ams.nl.ibm.com [127.0.0.1]) by ppma06ams.nl.ibm.com (8.16.0.42/8.16.0.42) with SMTP id 128EXfMf009628; Mon, 8 Mar 2021 14:33:41 GMT Received: from b06avi18878370.portsmouth.uk.ibm.com (b06avi18878370.portsmouth.uk.ibm.com [9.149.26.194]) by ppma06ams.nl.ibm.com with ESMTP id 37410h9x8q-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 08 Mar 2021 14:33:40 +0000 Received: from d06av23.portsmouth.uk.ibm.com (d06av23.portsmouth.uk.ibm.com [9.149.105.59]) by b06avi18878370.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 128EXMxx37093670 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 8 Mar 2021 14:33:23 GMT Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id F0763A4051; Mon, 8 Mar 2021 14:33:37 +0000 (GMT) Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 832D8A4055; Mon, 8 Mar 2021 14:33:37 +0000 (GMT) Received: from fedora.fritz.box (unknown [9.145.7.187]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTP; Mon, 8 Mar 2021 14:33:37 +0000 (GMT) From: Janosch Frank To: pbonzini@redhat.com Cc: kvm@vger.kernel.org, frankja@linux.ibm.com, david@redhat.com, borntraeger@de.ibm.com, cohuck@redhat.com, linux-s390@vger.kernel.org, imbrenda@linux.ibm.com Subject: [kvm-unit-tests GIT PULL 02/16] s390x: pv: implement routine to share/unshare memory Date: Mon, 8 Mar 2021 15:31:33 +0100 Message-Id: <20210308143147.64755-3-frankja@linux.ibm.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210308143147.64755-1-frankja@linux.ibm.com> References: <20210308143147.64755-1-frankja@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.369,18.0.761 definitions=2021-03-08_08:2021-03-08,2021-03-08 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 adultscore=0 suspectscore=0 mlxlogscore=999 spamscore=0 lowpriorityscore=0 phishscore=0 malwarescore=0 mlxscore=0 priorityscore=1501 impostorscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2103080080 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: Pierre Morel 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 Reviewed-by: Janosch Frank Acked-by: Cornelia Huck Acked-by: Thomas Huth Message-Id: <1611322060-1972-2-git-send-email-pmorel@linux.ibm.com> Signed-off-by: Janosch Frank --- lib/s390x/asm/uv.h | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) diff --git a/lib/s390x/asm/uv.h b/lib/s390x/asm/uv.h index 39d2dc04..9c491844 100644 --- a/lib/s390x/asm/uv.h +++ b/lib/s390x/asm/uv.h @@ -79,4 +79,43 @@ 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 == UVC_RC_EXECUTED) + return 0; + + report_info("uv_call: cmd %04x cc %d response code: %04x", cc, cmd, + 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 -- 2.29.2