From patchwork Mon Sep 20 23:01:53 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Longpeng (Mike, Cloud Infrastructure Service Product Dept.)" X-Patchwork-Id: 1530454 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) 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 ozlabs.org (Postfix) with ESMTPS id 4HD0XJ1Rynz9sRf for ; Tue, 21 Sep 2021 09:05:35 +1000 (AEST) Received: from localhost ([::1]:49242 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mSSLs-00014P-FD for incoming@patchwork.ozlabs.org; Mon, 20 Sep 2021 19:05:32 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:48232) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mSSIo-0005HX-0N for qemu-devel@nongnu.org; Mon, 20 Sep 2021 19:02:22 -0400 Received: from szxga08-in.huawei.com ([45.249.212.255]:2862) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mSSIl-0004bI-19 for qemu-devel@nongnu.org; Mon, 20 Sep 2021 19:02:21 -0400 Received: from dggemv711-chm.china.huawei.com (unknown [172.30.72.56]) by szxga08-in.huawei.com (SkyGuard) with ESMTP id 4HD0R165c5z1DH88; Tue, 21 Sep 2021 07:01:01 +0800 (CST) Received: from dggpeml100016.china.huawei.com (7.185.36.216) by dggemv711-chm.china.huawei.com (10.1.198.66) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Tue, 21 Sep 2021 07:02:09 +0800 Received: from DESKTOP-27KDQMV.china.huawei.com (10.174.148.223) by dggpeml100016.china.huawei.com (7.185.36.216) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Tue, 21 Sep 2021 07:02:09 +0800 From: "Longpeng(Mike)" To: , , , , Subject: [PATCH v3 0/9] optimize the downtime for vfio migration Date: Tue, 21 Sep 2021 07:01:53 +0800 Message-ID: <20210920230202.1439-1-longpeng2@huawei.com> X-Mailer: git-send-email 2.25.0.windows.1 MIME-Version: 1.0 X-Originating-IP: [10.174.148.223] X-ClientProxiedBy: dggems702-chm.china.huawei.com (10.3.19.179) To dggpeml100016.china.huawei.com (7.185.36.216) X-CFilter-Loop: Reflected Received-SPF: pass client-ip=45.249.212.255; envelope-from=longpeng2@huawei.com; helo=szxga08-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_H4=0.001, RCVD_IN_MSPIKE_WL=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: chenjiashang@huawei.com, "Longpeng\(Mike\)" , arei.gonglei@huawei.com, qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Hi guys, In vfio migration resume phase, the cost would increase if the vfio device has more unmasked vectors. We try to optimize it in this series. You can see the commit message in PATCH 9 for details. Patch 1-5 are simple cleanups and fixup. Patch 6-8 are the preparations for the optimization. Patch 9 optimizes the vfio msix setup path. Changes v2->v3: - fix two errors [Longpeng] Changes v1->v2: - fix several typos and grammatical errors [Alex, Philippe] - split fixups and cleanups into separate patches [Alex, Philippe] - introduce kvm_irqchip_add_deferred_msi_route to minimize code changes [Alex] - enable the optimization in msi setup path [Alex] Longpeng (Mike) (9): vfio: simplify the conditional statements in vfio_msi_enable vfio: move re-enabling INTX out of the common helper vfio: simplify the failure path in vfio_msi_enable msix: simplify the conditional in msix_set/unset_vector_notifiers msix: reset poll_notifier to NULL if fail to set notifiers kvm: irqchip: extract kvm_irqchip_add_deferred_msi_route vfio: add infrastructure to commit the deferred kvm routing Revert "vfio: Avoid disabling and enabling vectors repeatedly in VFIO migration" vfio: defer to commit kvm irq routing when enable msi/msix accel/kvm/kvm-all.c | 15 +++++- hw/pci/msix.c | 7 ++- hw/vfio/pci.c | 126 ++++++++++++++++++++++++++++--------------- hw/vfio/pci.h | 1 + include/sysemu/kvm.h | 6 +++ 5 files changed, 106 insertions(+), 49 deletions(-)