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, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 B1ACDC433E9 for ; Thu, 7 Jan 2021 04:45:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8A1D12311E for ; Thu, 7 Jan 2021 04:45:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727241AbhAGEpX (ORCPT ); Wed, 6 Jan 2021 23:45:23 -0500 Received: from szxga06-in.huawei.com ([45.249.212.32]:9967 "EHLO szxga06-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726641AbhAGEpW (ORCPT ); Wed, 6 Jan 2021 23:45:22 -0500 Received: from DGGEMS401-HUB.china.huawei.com (unknown [172.30.72.58]) by szxga06-in.huawei.com (SkyGuard) with ESMTP id 4DBDCF5MDtzhsSy; Thu, 7 Jan 2021 12:43:53 +0800 (CST) Received: from DESKTOP-5IS4806.china.huawei.com (10.174.184.42) by DGGEMS401-HUB.china.huawei.com (10.3.19.201) with Microsoft SMTP Server id 14.3.498.0; Thu, 7 Jan 2021 12:44:28 +0800 From: Keqian Zhu To: , , , , , Alex Williamson , Cornelia Huck , Will Deacon , "Marc Zyngier" , Catalin Marinas CC: Mark Rutland , James Morse , Robin Murphy , Joerg Roedel , "Daniel Lezcano" , Thomas Gleixner , Suzuki K Poulose , Julien Thierry , Andrew Morton , Alexios Zavras , , Subject: [PATCH 3/6] vfio/iommu_type1: Initially set the pinned_page_dirty_scope Date: Thu, 7 Jan 2021 12:43:58 +0800 Message-ID: <20210107044401.19828-4-zhukeqian1@huawei.com> X-Mailer: git-send-email 2.8.4.windows.1 In-Reply-To: <20210107044401.19828-1-zhukeqian1@huawei.com> References: <20210107044401.19828-1-zhukeqian1@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.174.184.42] X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org For now there are 3 ways to promote the pinned_page_dirty_scope status of vfio_iommu: 1. Through vfio pin interface. 2. Detach a group without pinned_dirty_scope. 3. Attach a group with pinned_dirty_scope. For point 3, the only chance to promote the pinned_page_dirty_scope status is when vfio_iommu is newly created. As we can safely set empty vfio_iommu to be at pinned status, then the point 3 can be removed to reduce operations. Signed-off-by: Keqian Zhu --- drivers/vfio/vfio_iommu_type1.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c index 110ada24ee91..b596c482487b 100644 --- a/drivers/vfio/vfio_iommu_type1.c +++ b/drivers/vfio/vfio_iommu_type1.c @@ -2045,11 +2045,8 @@ static int vfio_iommu_type1_attach_group(void *iommu_data, * Non-iommu backed group cannot dirty memory directly, * it can only use interfaces that provide dirty * tracking. - * The iommu scope can only be promoted with the - * addition of a dirty tracking group. */ group->pinned_page_dirty_scope = true; - promote_pinned_page_dirty_scope(iommu); mutex_unlock(&iommu->lock); return 0; @@ -2436,6 +2433,7 @@ static void *vfio_iommu_type1_open(unsigned long arg) INIT_LIST_HEAD(&iommu->iova_list); iommu->dma_list = RB_ROOT; iommu->dma_avail = dma_entry_limit; + iommu->pinned_page_dirty_scope = true; mutex_init(&iommu->lock); BLOCKING_INIT_NOTIFIER_HEAD(&iommu->notifier); -- 2.19.1