From patchwork Tue Apr 5 11:42:00 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cao jin X-Patchwork-Id: 8749951 Return-Path: X-Original-To: patchwork-qemu-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 2EB9AC0553 for ; Tue, 5 Apr 2016 11:43:28 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 8C3FD2034E for ; Tue, 5 Apr 2016 11:43:27 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D14A9202F0 for ; Tue, 5 Apr 2016 11:43:26 +0000 (UTC) Received: from localhost ([::1]:36397 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1anPOI-0004lE-9f for patchwork-qemu-devel@patchwork.kernel.org; Tue, 05 Apr 2016 07:43:26 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:38862) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1anPKv-00071F-9D for qemu-devel@nongnu.org; Tue, 05 Apr 2016 07:39:58 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1anPKu-0006HW-1o for qemu-devel@nongnu.org; Tue, 05 Apr 2016 07:39:57 -0400 Received: from [59.151.112.132] (port=60871 helo=heian.cn.fujitsu.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1anPKt-0006Eu-FA for qemu-devel@nongnu.org; Tue, 05 Apr 2016 07:39:55 -0400 X-IronPort-AV: E=Sophos;i="5.22,518,1449504000"; d="scan'208";a="5282005" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 05 Apr 2016 19:39:54 +0800 Received: from G08CNEXCHPEKD03.g08.fujitsu.local (unknown [10.167.33.85]) by cn.fujitsu.com (Postfix) with ESMTP id 969CE408D27C; Tue, 5 Apr 2016 19:39:52 +0800 (CST) Received: from G08FNSTD140223.g08.fujitsu.local (10.167.226.69) by G08CNEXCHPEKD03.g08.fujitsu.local (10.167.33.89) with Microsoft SMTP Server (TLS) id 14.3.279.2; Tue, 5 Apr 2016 19:39:52 +0800 From: Cao jin To: Date: Tue, 5 Apr 2016 19:42:00 +0800 Message-ID: <1459856523-17085-10-git-send-email-caoj.fnst@cn.fujitsu.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1459856523-17085-1-git-send-email-caoj.fnst@cn.fujitsu.com> References: <1459856523-17085-1-git-send-email-caoj.fnst@cn.fujitsu.com> MIME-Version: 1.0 X-Originating-IP: [10.167.226.69] X-yoursite-MailScanner-ID: 969CE408D27C.ADD93 X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: caoj.fnst@cn.fujitsu.com X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 59.151.112.132 Cc: Chen Fan , izumi.taku@jp.fujitsu.com, alex.williamson@redhat.com, mst@redhat.com Subject: [Qemu-devel] [patch v6 09/12] vfio: vote the function 0 to do host bus reset when aer occurred X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Chen Fan Due to all devices assigned to VM on the same way as host if enable aer, so we can easily do the hot reset by selecting the function #0 to do the hot reset. Signed-off-by: Chen Fan --- hw/vfio/pci.c | 14 ++++++++++++++ hw/vfio/pci.h | 1 + 2 files changed, 15 insertions(+) diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c index 16a4a3b..5142707 100644 --- a/hw/vfio/pci.c +++ b/hw/vfio/pci.c @@ -1950,6 +1950,8 @@ static void vfio_check_hot_bus_reset(VFIOPCIDevice *vdev, Error **errp) /* List all affected devices by bus reset */ devices = &info->devices[0]; + vdev->single_depend_dev = (info->count == 1); + /* Verify that we have all the groups required */ for (i = 0; i < info->count; i++) { PCIHostDeviceAddress host; @@ -3059,6 +3061,18 @@ static void vfio_pci_reset(DeviceState *dev) trace_vfio_pci_reset(vdev->vbasedev.name); + if (vdev->features & VFIO_FEATURE_ENABLE_AER) { + PCIDevice *br = pci_bridge_get_device(pdev->bus); + + if ((pci_get_word(br->config + PCI_BRIDGE_CONTROL) & + PCI_BRIDGE_CTL_BUS_RESET)) { + if (pci_get_function_0(pdev) == pdev) { + vfio_pci_hot_reset(vdev, vdev->single_depend_dev); + } + return; + } + } + vfio_pci_pre_reset(vdev); if (vdev->resetfn && !vdev->resetfn(vdev)) { diff --git a/hw/vfio/pci.h b/hw/vfio/pci.h index db7c6d5..9fb0206 100644 --- a/hw/vfio/pci.h +++ b/hw/vfio/pci.h @@ -143,6 +143,7 @@ typedef struct VFIOPCIDevice { bool no_kvm_intx; bool no_kvm_msi; bool no_kvm_msix; + bool single_depend_dev; } VFIOPCIDevice; uint32_t vfio_pci_read_config(PCIDevice *pdev, uint32_t addr, int len);