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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 8D387C2BA83 for ; Thu, 13 Feb 2020 15:33:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 63939222C2 for ; Thu, 13 Feb 2020 15:33:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581608011; bh=F72EiyA+IiELPNaODgNRBv6WEF9RdIqrmfKes5y6Osw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=WxY7Ptwi6kOSdWWszDnJ9v/bzDYmoaiicHX6jl+3GZiSa5KgAFvb270H+cAxyWF0z G6Jb/L7c9nIYcqdS36peX8PG4SNUnNVxkutKpTUp+srpsb4jxZ7kjsCt3iDcA72GEE BxyRDxqsXk2d2HaqMmubcQV2hn29LX48zZgFJD/Q= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729905AbgBMPda (ORCPT ); Thu, 13 Feb 2020 10:33:30 -0500 Received: from mail.kernel.org ([198.145.29.99]:57966 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728493AbgBMP3B (ORCPT ); Thu, 13 Feb 2020 10:29:01 -0500 Received: from localhost (unknown [104.132.1.104]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id E37D72168B; Thu, 13 Feb 2020 15:29:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581607741; bh=F72EiyA+IiELPNaODgNRBv6WEF9RdIqrmfKes5y6Osw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IuhORwr3y1m6/mV+gL0+tq9KUvVTv3FJns8J82CKcFfsoTZT/8XtLPx3UkOMWnYDI j8Fro1EVKlX5cBI3X02e9dcs6XJdvr6UtEL/bIy5g0OJKHU2RAp8K4JxeagvlUhJ4s tgJNQVwE6aeDsvqJ5QYphq+bGM6EV9HPBkcSGxEM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Eric Auger , Marc Zyngier , Zenghui Yu Subject: [PATCH 5.5 077/120] KVM: arm/arm64: vgic-its: Fix restoration of unmapped collections Date: Thu, 13 Feb 2020 07:21:13 -0800 Message-Id: <20200213151927.406402983@linuxfoundation.org> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200213151901.039700531@linuxfoundation.org> References: <20200213151901.039700531@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Eric Auger commit 8c58be34494b7f1b2adb446e2d8beeb90e5de65b upstream. Saving/restoring an unmapped collection is a valid scenario. For example this happens if a MAPTI command was sent, featuring an unmapped collection. At the moment the CTE fails to be restored. Only compare against the number of online vcpus if the rdist base is set. Fixes: ea1ad53e1e31a ("KVM: arm64: vgic-its: Collection table save/restore") Signed-off-by: Eric Auger Signed-off-by: Marc Zyngier Reviewed-by: Zenghui Yu Link: https://lore.kernel.org/r/20191213094237.19627-1-eric.auger@redhat.com Signed-off-by: Greg Kroah-Hartman --- virt/kvm/arm/vgic/vgic-its.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/virt/kvm/arm/vgic/vgic-its.c +++ b/virt/kvm/arm/vgic/vgic-its.c @@ -2475,7 +2475,8 @@ static int vgic_its_restore_cte(struct v target_addr = (u32)(val >> KVM_ITS_CTE_RDBASE_SHIFT); coll_id = val & KVM_ITS_CTE_ICID_MASK; - if (target_addr >= atomic_read(&kvm->online_vcpus)) + if (target_addr != COLLECTION_NOT_MAPPED && + target_addr >= atomic_read(&kvm->online_vcpus)) return -EINVAL; collection = find_collection(its, coll_id);