From patchwork Mon Jul 8 19:17:25 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kirti Wankhede X-Patchwork-Id: 11035745 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 61852112C for ; Mon, 8 Jul 2019 19:26:16 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4C6F3285A9 for ; Mon, 8 Jul 2019 19:26:16 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3D06E285BA; Mon, 8 Jul 2019 19:26:16 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.0 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id BD89B285A9 for ; Mon, 8 Jul 2019 19:26:15 +0000 (UTC) Received: from localhost ([::1]:44224 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hkZHD-0004JG-4G for patchwork-qemu-devel@patchwork.kernel.org; Mon, 08 Jul 2019 15:26:15 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:35019) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hkZCF-00050V-TA for qemu-devel@nongnu.org; Mon, 08 Jul 2019 15:21:09 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hkZCC-0002zT-4C for qemu-devel@nongnu.org; Mon, 08 Jul 2019 15:21:07 -0400 Received: from hqemgate15.nvidia.com ([216.228.121.64]:17651) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hkZCB-0002oX-BF for qemu-devel@nongnu.org; Mon, 08 Jul 2019 15:21:03 -0400 Received: from hqpgpgate101.nvidia.com (Not Verified[216.228.121.13]) by hqemgate15.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Mon, 08 Jul 2019 12:20:52 -0700 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate101.nvidia.com (PGP Universal service); Mon, 08 Jul 2019 12:20:47 -0700 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Mon, 08 Jul 2019 12:20:47 -0700 Received: from HQMAIL108.nvidia.com (172.18.146.13) by HQMAIL101.nvidia.com (172.20.187.10) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Mon, 8 Jul 2019 19:20:47 +0000 Received: from kwankhede-dev.nvidia.com (10.124.1.5) by HQMAIL108.nvidia.com (172.18.146.13) with Microsoft SMTP Server (TLS) id 15.0.1473.3 via Frontend Transport; Mon, 8 Jul 2019 19:20:41 +0000 From: Kirti Wankhede To: , Date: Tue, 9 Jul 2019 00:47:25 +0530 Message-ID: <1562613452-24969-7-git-send-email-kwankhede@nvidia.com> X-Mailer: git-send-email 2.7.0 In-Reply-To: <1562613452-24969-1-git-send-email-kwankhede@nvidia.com> References: <1562613452-24969-1-git-send-email-kwankhede@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1562613652; bh=CzIjuh45DV8zioWi2bRTMYHoiTulp8p5NKtpMhF1Pz8=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:X-NVConfidentiality:MIME-Version: Content-Type; b=As0ebpahHZlh7XzbLNPzWT43U7ghR4CVDo/YiMP2MLP1LZO2DXFfwWBDW5HVZmQYM Vujuj5wtx5f3bRm5yXVZQhDj5HV4yyB+JW85gWa1Q4F5qx1p6pk9sKlHYph5LFcLs9 8St7v7YQM+YaJ8HTZoj7brBBJu7MjL48l7+tniSJ5Cuoioe/JVfQ8r/tyN8x+H68+E /aTp2x78VVpXd4cGj2S38xAN4UhqvnJ6dUX38+SQ81SZfGttwmHzjZUxJwYVY0QJwj wSY/R3rlBOvftWZ1/MkJ0Js212NlDFgpJms8an1NM3Dp0yPvSj0Lf6YTbtpeX4s7PA y0tMAheg9PNyA== X-detected-operating-system: by eggs.gnu.org: Windows 7 or 8 X-Received-From: 216.228.121.64 Subject: [Qemu-devel] [PATCH v5 06/13] vfio: Add VM state change handler to know state of VM 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: Zhengxiao.zx@Alibaba-inc.com, kevin.tian@intel.com, yi.l.liu@intel.com, yan.y.zhao@intel.com, eskultet@redhat.com, ziye.yang@intel.com, qemu-devel@nongnu.org, cohuck@redhat.com, shuangtai.tst@alibaba-inc.com, dgilbert@redhat.com, zhi.a.wang@intel.com, mlevitsk@redhat.com, pasic@linux.ibm.com, aik@ozlabs.ru, Kirti Wankhede , eauger@redhat.com, felipe@nutanix.com, jonathan.davies@nutanix.com, changpeng.liu@intel.com, Ken.Xue@amd.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP VM state change handler gets called on change in VM's state. This is used to set VFIO device state to _RUNNING. VM state change handler, migration state change handler and log_sync listener are called asynchronously, which sometimes lead to data corruption in migration region. Initialised mutex that is used to serialize operations on migration data region during saving state. Signed-off-by: Kirti Wankhede Reviewed-by: Neo Jia --- hw/vfio/migration.c | 64 +++++++++++++++++++++++++++++++++++++++++++ hw/vfio/trace-events | 2 ++ include/hw/vfio/vfio-common.h | 4 +++ 3 files changed, 70 insertions(+) diff --git a/hw/vfio/migration.c b/hw/vfio/migration.c index a2cfbd5af2e1..c01f08b659d0 100644 --- a/hw/vfio/migration.c +++ b/hw/vfio/migration.c @@ -78,6 +78,60 @@ err: return ret; } +static int vfio_migration_set_state(VFIODevice *vbasedev, uint32_t state) +{ + VFIOMigration *migration = vbasedev->migration; + VFIORegion *region = &migration->region.buffer; + uint32_t device_state; + int ret = 0; + + device_state = (state & VFIO_DEVICE_STATE_MASK) | + (vbasedev->device_state & ~VFIO_DEVICE_STATE_MASK); + + if ((device_state & VFIO_DEVICE_STATE_MASK) == VFIO_DEVICE_STATE_INVALID) { + return -EINVAL; + } + + ret = pwrite(vbasedev->fd, &device_state, sizeof(device_state), + region->fd_offset + offsetof(struct vfio_device_migration_info, + device_state)); + if (ret < 0) { + error_report("%s: Failed to set device state %d %s", + vbasedev->name, ret, strerror(errno)); + return ret; + } + + vbasedev->device_state = device_state; + trace_vfio_migration_set_state(vbasedev->name, device_state); + return 0; +} + +static void vfio_vmstate_change(void *opaque, int running, RunState state) +{ + VFIODevice *vbasedev = opaque; + + if ((vbasedev->vm_running != running)) { + int ret; + uint32_t dev_state; + + if (running) { + dev_state = VFIO_DEVICE_STATE_RUNNING; + } else { + dev_state = (vbasedev->device_state & VFIO_DEVICE_STATE_MASK) & + ~VFIO_DEVICE_STATE_RUNNING; + } + + ret = vfio_migration_set_state(vbasedev, dev_state); + if (ret) { + error_report("%s: Failed to set device state 0x%x", + vbasedev->name, dev_state); + } + vbasedev->vm_running = running; + trace_vfio_vmstate_change(vbasedev->name, running, RunState_str(state), + dev_state); + } +} + static int vfio_migration_init(VFIODevice *vbasedev, struct vfio_region_info *info) { @@ -93,6 +147,11 @@ static int vfio_migration_init(VFIODevice *vbasedev, return ret; } + qemu_mutex_init(&vbasedev->migration->lock); + + vbasedev->vm_state = qemu_add_vm_change_state_handler(vfio_vmstate_change, + vbasedev); + return 0; } @@ -135,11 +194,16 @@ void vfio_migration_finalize(VFIODevice *vbasedev) return; } + if (vbasedev->vm_state) { + qemu_del_vm_change_state_handler(vbasedev->vm_state); + } + if (vbasedev->migration_blocker) { migrate_del_blocker(vbasedev->migration_blocker); error_free(vbasedev->migration_blocker); } + qemu_mutex_destroy(&vbasedev->migration->lock); vfio_migration_region_exit(vbasedev); g_free(vbasedev->migration); } diff --git a/hw/vfio/trace-events b/hw/vfio/trace-events index 191a726a1312..3d15bacd031a 100644 --- a/hw/vfio/trace-events +++ b/hw/vfio/trace-events @@ -146,3 +146,5 @@ vfio_display_edid_write_error(void) "" # migration.c vfio_migration_probe(char *name, uint32_t index) " (%s) Region %d" +vfio_migration_set_state(char *name, uint32_t state) " (%s) state %d" +vfio_vmstate_change(char *name, int running, const char *reason, uint32_t dev_state) " (%s) running %d reason %s device state %d" diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h index 152da3f8d6f3..f6c70db3a9c1 100644 --- a/include/hw/vfio/vfio-common.h +++ b/include/hw/vfio/vfio-common.h @@ -29,6 +29,7 @@ #ifdef CONFIG_LINUX #include #endif +#include "sysemu/sysemu.h" #define VFIO_MSG_PREFIX "vfio %s: " @@ -124,6 +125,9 @@ typedef struct VFIODevice { unsigned int flags; VFIOMigration *migration; Error *migration_blocker; + uint32_t device_state; + VMChangeStateEntry *vm_state; + int vm_running; } VFIODevice; struct VFIODeviceOps {