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=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 9C944C2BA83 for ; Thu, 13 Feb 2020 15:44:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 68092218AC for ; Thu, 13 Feb 2020 15:44:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581608679; bh=VE7PXwSmSw9JapI9rq7+PLy8h/PzC/94PCA7N3oN+B4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=0W/azJZ3c8xwKROA7fEwcIjvESD/GHTkpLLxZwBEFQKrUjC4y7tG8QpO6CyJaK/2z k2rsRy0crylOfuD1nMCn8bWzOSHq1s3MWbbtRDhKPKdtJzwYdysYxjToQks7jlQAF0 Iq31G/FkfZablcIzXrLx+8AJg18XWnVt+ZKJSbd8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729727AbgBMPoi (ORCPT ); Thu, 13 Feb 2020 10:44:38 -0500 Received: from mail.kernel.org ([198.145.29.99]:52056 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728894AbgBMP1l (ORCPT ); Thu, 13 Feb 2020 10:27:41 -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 2A63F20661; Thu, 13 Feb 2020 15:27:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581607661; bh=VE7PXwSmSw9JapI9rq7+PLy8h/PzC/94PCA7N3oN+B4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=2V4EXcalSzMq2uMDnMnv1iq075VRrztzTn0CBRFtneaPER66Rx0hNxtr/GPfFw75k Z/EzfwY4pTBL3NVa+7WYrZvAv1j+rgeTWPmDwLbBuUOIh1UY7IYJ6Q/3IwDPBLjHyT IOCNlbe1rflwpsnhbtC8OzL2YcLXmaPy3168UkaY= 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 5.4 62/96] KVM: arm/arm64: vgic-its: Fix restoration of unmapped collections Date: Thu, 13 Feb 2020 07:21:09 -0800 Message-Id: <20200213151903.026499129@linuxfoundation.org> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200213151839.156309910@linuxfoundation.org> References: <20200213151839.156309910@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 @@ -2472,7 +2472,8 @@ 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);