From patchwork Tue Oct 19 13:41:49 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andreas Gruenbacher X-Patchwork-Id: 12569965 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0A14BC433F5 for ; Tue, 19 Oct 2021 13:43:01 +0000 (UTC) Received: from mx0b-00069f02.pphosted.com (mx0b-00069f02.pphosted.com [205.220.177.32]) (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 B0D5260F9F for ; Tue, 19 Oct 2021 13:43:00 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org B0D5260F9F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=oss.oracle.com Received: from pps.filterd (m0246630.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.16.1.2/8.16.1.2) with SMTP id 19JDU8uN024437; Tue, 19 Oct 2021 13:42:59 GMT Received: from userp3020.oracle.com (userp3020.oracle.com [156.151.31.79]) by mx0b-00069f02.pphosted.com with ESMTP id 3bsn7kjt4r-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 19 Oct 2021 13:42:59 +0000 Received: from pps.filterd (userp3020.oracle.com [127.0.0.1]) by userp3020.oracle.com (8.16.1.2/8.16.1.2) with SMTP id 19JDfW5u155732; Tue, 19 Oct 2021 13:42:57 GMT Received: from oss.oracle.com (oss-old-reserved.oracle.com [137.254.22.2]) by userp3020.oracle.com with ESMTP id 3br8gsc89p-1 (version=TLSv1 cipher=AES256-SHA bits=256 verify=NO); Tue, 19 Oct 2021 13:42:57 +0000 Received: from localhost ([127.0.0.1] helo=lb-oss.oracle.com) by oss.oracle.com with esmtp (Exim 4.63) (envelope-from ) id 1mcpOK-0003HB-L2; Tue, 19 Oct 2021 06:42:56 -0700 Received: from aserp3020.oracle.com ([141.146.126.70]) by oss.oracle.com with esmtp (Exim 4.63) (envelope-from ) id 1mcpNr-0003Dj-01 for ocfs2-devel@oss.oracle.com; Tue, 19 Oct 2021 06:42:27 -0700 Received: from pps.filterd (aserp3020.oracle.com [127.0.0.1]) by aserp3020.oracle.com (8.16.1.2/8.16.1.2) with SMTP id 19JDf9g6035733 for ; Tue, 19 Oct 2021 13:42:26 GMT Received: from mx0a-00069f01.pphosted.com (mx0a-00069f01.pphosted.com [205.220.165.26]) by aserp3020.oracle.com with ESMTP id 3bqpj5dtur-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Tue, 19 Oct 2021 13:42:26 +0000 Received: from pps.filterd (m0246572.ppops.net [127.0.0.1]) by mx0b-00069f01.pphosted.com (8.16.1.2/8.16.1.2) with SMTP id 19JBgqoE008975 for ; Tue, 19 Oct 2021 13:42:25 GMT Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by mx0b-00069f01.pphosted.com with ESMTP id 3bsgjua0tk-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Tue, 19 Oct 2021 13:42:25 +0000 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-139-bITwJvGXMJCsDZUQXKOP9A-1; Tue, 19 Oct 2021 09:42:20 -0400 X-MC-Unique: bITwJvGXMJCsDZUQXKOP9A-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id EA0CE814249; Tue, 19 Oct 2021 13:42:17 +0000 (UTC) Received: from max.com (unknown [10.40.193.143]) by smtp.corp.redhat.com (Postfix) with ESMTP id 7023410016FC; Tue, 19 Oct 2021 13:42:14 +0000 (UTC) From: Andreas Gruenbacher To: Linus Torvalds , Catalin Marinas , Paul Mackerras Date: Tue, 19 Oct 2021 15:41:49 +0200 Message-Id: <20211019134204.3382645-3-agruenba@redhat.com> In-Reply-To: <20211019134204.3382645-1-agruenba@redhat.com> References: <20211019134204.3382645-1-agruenba@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Proofpoint-SPF-Result: pass X-Proofpoint-SPF-Record: v=spf1 ip4:103.23.64.2 ip4:103.23.65.2 ip4:103.23.66.26 ip4:103.23.67.26 ip4:107.21.15.141 ip4:108.177.8.0/21 ip4:128.17.0.0/20 ip4:128.17.128.0/20 ip4:128.17.192.0/20 ip4:128.17.64.0/20 ip4:128.245.0.0/20 ip4:128.245.64.0/20 ip4:13.110.208.0/21 ip4:13.110.216.0/22 ip4:13.110.224.0/20 ip4:13.111.0.0/16 ip4:136.147.128.0/20 include:spf1.redhat.com -all X-Proofpoint-SPF-VenPass: Allowed X-Source-IP: 170.10.129.124 X-ServerName: us-smtp-delivery-124.mimecast.com X-Proofpoint-SPF-Result: pass X-Proofpoint-SPF-Record: v=spf1 ip4:103.23.64.2 ip4:103.23.65.2 ip4:103.23.66.26 ip4:103.23.67.26 ip4:107.21.15.141 ip4:108.177.8.0/21 ip4:128.17.0.0/20 ip4:128.17.128.0/20 ip4:128.17.192.0/20 ip4:128.17.64.0/20 ip4:128.245.0.0/20 ip4:128.245.64.0/20 ip4:13.110.208.0/21 ip4:13.110.216.0/22 ip4:13.110.224.0/20 ip4:13.111.0.0/16 ip4:136.147.128.0/20 include:spf1.redhat.com -all X-Proofpoint-Virus-Version: vendor=nai engine=6300 definitions=10141 signatures=668683 X-Proofpoint-Spam-Reason: safe X-Spam: OrgSafeList X-SpamRule: orgsafelist Cc: kvm-ppc@vger.kernel.org, cluster-devel@redhat.com, Jan Kara , Andreas Gruenbacher , linux-kernel@vger.kernel.org, Christoph Hellwig , Alexander Viro , linux-fsdevel@vger.kernel.org, stable@vger.kernel.org, linux-btrfs@vger.kernel.org, ocfs2-devel@oss.oracle.com Subject: [Ocfs2-devel] [PATCH v8 02/17] powerpc/kvm: Fix kvm_use_magic_page X-BeenThere: ocfs2-devel@oss.oracle.com X-Mailman-Version: 2.1.9 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: ocfs2-devel-bounces@oss.oracle.com Errors-To: ocfs2-devel-bounces@oss.oracle.com X-Proofpoint-Virus-Version: vendor=nai engine=6300 definitions=10141 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxlogscore=999 mlxscore=0 adultscore=0 spamscore=0 phishscore=0 bulkscore=0 suspectscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2109230001 definitions=main-2110190084 X-Proofpoint-ORIG-GUID: ERWMeYTa9_CxA8UR0Ia1kmsrVuH6ddxT X-Proofpoint-GUID: ERWMeYTa9_CxA8UR0Ia1kmsrVuH6ddxT When switching from __get_user to fault_in_pages_readable, commit 9f9eae5ce717 broke kvm_use_magic_page: like __get_user, fault_in_pages_readable returns 0 on success. Fixes: 9f9eae5ce717 ("powerpc/kvm: Prefer fault_in_pages_readable function") Cc: stable@vger.kernel.org # v4.18+ Signed-off-by: Andreas Gruenbacher --- arch/powerpc/kernel/kvm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/kernel/kvm.c b/arch/powerpc/kernel/kvm.c index 617eba82531c..d89cf802d9aa 100644 --- a/arch/powerpc/kernel/kvm.c +++ b/arch/powerpc/kernel/kvm.c @@ -669,7 +669,7 @@ static void __init kvm_use_magic_page(void) on_each_cpu(kvm_map_magic_page, &features, 1); /* Quick self-test to see if the mapping works */ - if (!fault_in_pages_readable((const char *)KVM_MAGIC_PAGE, sizeof(u32))) { + if (fault_in_pages_readable((const char *)KVM_MAGIC_PAGE, sizeof(u32))) { kvm_patching_worked = false; return; }