From patchwork Tue Dec 15 07:19:48 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: zhukeqian X-Patchwork-Id: 11974133 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, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 AFBA8C4361B for ; Tue, 15 Dec 2020 07:25:38 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 4519420791 for ; Tue, 15 Dec 2020 07:25:38 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4519420791 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:41986 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kp4iH-0005nO-9u for qemu-devel@archiver.kernel.org; Tue, 15 Dec 2020 02:25:37 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:57166) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kp4dI-0001NC-Db; Tue, 15 Dec 2020 02:20:29 -0500 Received: from szxga05-in.huawei.com ([45.249.212.191]:2994) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kp4d8-0008SV-FF; Tue, 15 Dec 2020 02:20:27 -0500 Received: from DGGEMS414-HUB.china.huawei.com (unknown [172.30.72.58]) by szxga05-in.huawei.com (SkyGuard) with ESMTP id 4Cw8lR607jzhsXP; Tue, 15 Dec 2020 15:19:31 +0800 (CST) Received: from DESKTOP-5IS4806.china.huawei.com (10.174.187.37) by DGGEMS414-HUB.china.huawei.com (10.3.19.214) with Microsoft SMTP Server id 14.3.498.0; Tue, 15 Dec 2020 15:19:57 +0800 From: Keqian Zhu To: Peter Maydell , Paolo Bonzini , "Dr . David Alan Gilbert" , "Peter Xu" Subject: [PATCH 2/2] accel: kvm: Add aligment check for kvm_log_clear_one_slot Date: Tue, 15 Dec 2020 15:19:48 +0800 Message-ID: <20201215071948.23940-3-zhukeqian1@huawei.com> X-Mailer: git-send-email 2.8.4.windows.1 In-Reply-To: <20201215071948.23940-1-zhukeqian1@huawei.com> References: <20201215071948.23940-1-zhukeqian1@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.174.187.37] X-CFilter-Loop: Reflected Received-SPF: pass client-ip=45.249.212.191; envelope-from=zhukeqian1@huawei.com; helo=szxga05-in.huawei.com X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jiangkunkun@huawei.com, qemu-devel@nongnu.org, qemu-arm@nongnu.org, Zenghui Yu , wanghaibin.wang@huawei.com, Keqian Zhu Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" The parameters start and size are transfered from QEMU memory emulation layer. It can promise that they are TARGET_PAGE_SIZE aligned. However, KVM needs they are qemu_real_page_size aligned. Though no caller breaks this aligned requirement currently, we'd better add an explicit check to avoid future breaking. Signed-off-by: Keqian Zhu --- accel/kvm/kvm-all.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c index c5e06288eb..3d0e3aa872 100644 --- a/accel/kvm/kvm-all.c +++ b/accel/kvm/kvm-all.c @@ -701,6 +701,11 @@ static int kvm_log_clear_one_slot(KVMSlot *mem, int as_id, uint64_t start, unsigned long *bmap_clear = NULL, psize = qemu_real_host_page_size; int ret; + /* Make sure start and size are psize aligned */ + if (!QEMU_IS_ALIGNED(start, psize) || !QEMU_IS_ALIGNED(size, psize)) { + return -EINVAL; + } + /* * We need to extend either the start or the size or both to * satisfy the KVM interface requirement. Firstly, do the start