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Violators will be prosecuted; Fri, 10 Jun 2016 10:04:20 +0100 X-IBM-Helo: d06dlp02.portsmouth.uk.ibm.com X-IBM-MailFrom: cornelia.huck@de.ibm.com X-IBM-RcptTo: qemu-devel@nongnu.org Received: from b06cxnps4075.portsmouth.uk.ibm.com (d06relay12.portsmouth.uk.ibm.com [9.149.109.197]) by d06dlp02.portsmouth.uk.ibm.com (Postfix) with ESMTP id 2139A219005F for ; Fri, 10 Jun 2016 10:03:52 +0100 (BST) Received: from d06av05.portsmouth.uk.ibm.com (d06av05.portsmouth.uk.ibm.com [9.149.37.229]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u5A94JNt60096546 for ; Fri, 10 Jun 2016 09:04:19 GMT Received: from d06av05.portsmouth.uk.ibm.com (localhost [127.0.0.1]) by d06av05.portsmouth.uk.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u5A94IHS018727 for ; Fri, 10 Jun 2016 03:04:18 -0600 Received: from tuxmaker.boeblingen.de.ibm.com (tuxmaker.boeblingen.de.ibm.com [9.152.85.9]) by d06av05.portsmouth.uk.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id u5A94Fa1018389 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA256 bits=256 verify=NO); Fri, 10 Jun 2016 03:04:18 -0600 From: Cornelia Huck To: qemu-devel@nongnu.org Date: Fri, 10 Jun 2016 11:04:12 +0200 X-Mailer: git-send-email 2.6.6 In-Reply-To: <1465549454-58809-1-git-send-email-cornelia.huck@de.ibm.com> References: <1465549454-58809-1-git-send-email-cornelia.huck@de.ibm.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16061009-0024-0000-0000-000002173277 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 16061009-0025-0000-0000-000018ED153C Message-Id: <1465549454-58809-5-git-send-email-cornelia.huck@de.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2016-06-10_06:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=1 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1604210000 definitions=main-1606100104 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] X-Received-From: 148.163.156.1 Subject: [Qemu-devel] [PATCH 4/6] virtio-pci: convert to ioeventfd callbacks X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: famz@redhat.com, mst@redhat.com, borntraeger@de.ibm.com, stefanha@redhat.com, Cornelia Huck , pbonzini@redhat.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Convert to new interface. Signed-off-by: Cornelia Huck --- hw/virtio/virtio-pci.c | 124 ++++++++++++++++--------------------------------- 1 file changed, 41 insertions(+), 83 deletions(-) diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index bfedbbf..ca2003c 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -262,14 +262,44 @@ static int virtio_pci_load_queue(DeviceState *d, int n, QEMUFile *f) return 0; } +static bool virtio_pci_ioeventfd_started(DeviceState *d) +{ + VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); + + return proxy->ioeventfd_started; +} + +static void virtio_pci_ioeventfd_set_started(DeviceState *d, bool started, + bool err) +{ + VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); + + proxy->ioeventfd_started = started; +} + +static bool virtio_pci_ioeventfd_disabled(DeviceState *d) +{ + VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); + + return proxy->ioeventfd_disabled || + !(proxy->flags & VIRTIO_PCI_FLAG_USE_IOEVENTFD); +} + +static void virtio_pci_ioeventfd_set_disabled(DeviceState *d, bool disabled) +{ + VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); + + proxy->ioeventfd_disabled = disabled; +} + #define QEMU_VIRTIO_PCI_QUEUE_MEM_MULT 0x1000 -static int virtio_pci_set_host_notifier_internal(VirtIOPCIProxy *proxy, - int n, bool assign, bool set_handler) +static int virtio_pci_ioeventfd_assign(DeviceState *d, EventNotifier *notifier, + int n, bool assign) { + VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); VirtQueue *vq = virtio_get_queue(vdev, n); - EventNotifier *notifier = virtio_queue_get_host_notifier(vq); bool legacy = !(proxy->flags & VIRTIO_PCI_FLAG_DISABLE_LEGACY); bool modern = !(proxy->flags & VIRTIO_PCI_FLAG_DISABLE_MODERN); bool fast_mmio = kvm_ioeventfd_any_length_enabled(); @@ -280,16 +310,8 @@ static int virtio_pci_set_host_notifier_internal(VirtIOPCIProxy *proxy, hwaddr modern_addr = QEMU_VIRTIO_PCI_QUEUE_MEM_MULT * virtio_get_queue_index(vq); hwaddr legacy_addr = VIRTIO_PCI_QUEUE_NOTIFY; - int r = 0; if (assign) { - r = event_notifier_init(notifier, 1); - if (r < 0) { - error_report("%s: unable to init event notifier: %d", - __func__, r); - return r; - } - virtio_queue_set_host_notifier_fd_handler(vq, true, set_handler); if (modern) { if (fast_mmio) { memory_region_add_eventfd(modern_mr, modern_addr, 0, @@ -325,68 +347,18 @@ static int virtio_pci_set_host_notifier_internal(VirtIOPCIProxy *proxy, memory_region_del_eventfd(legacy_mr, legacy_addr, 2, true, n, notifier); } - virtio_queue_set_host_notifier_fd_handler(vq, false, false); - event_notifier_cleanup(notifier); } - return r; + return 0; } static void virtio_pci_start_ioeventfd(VirtIOPCIProxy *proxy) { - VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); - int n, r; - - if (!(proxy->flags & VIRTIO_PCI_FLAG_USE_IOEVENTFD) || - proxy->ioeventfd_disabled || - proxy->ioeventfd_started) { - return; - } - - for (n = 0; n < VIRTIO_QUEUE_MAX; n++) { - if (!virtio_queue_get_num(vdev, n)) { - continue; - } - - r = virtio_pci_set_host_notifier_internal(proxy, n, true, true); - if (r < 0) { - goto assign_error; - } - } - proxy->ioeventfd_started = true; - return; - -assign_error: - while (--n >= 0) { - if (!virtio_queue_get_num(vdev, n)) { - continue; - } - - r = virtio_pci_set_host_notifier_internal(proxy, n, false, false); - assert(r >= 0); - } - proxy->ioeventfd_started = false; - error_report("%s: failed. Fallback to a userspace (slower).", __func__); + virtio_bus_start_ioeventfd(&proxy->bus); } static void virtio_pci_stop_ioeventfd(VirtIOPCIProxy *proxy) { - VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); - int r; - int n; - - if (!proxy->ioeventfd_started) { - return; - } - - for (n = 0; n < VIRTIO_QUEUE_MAX; n++) { - if (!virtio_queue_get_num(vdev, n)) { - continue; - } - - r = virtio_pci_set_host_notifier_internal(proxy, n, false, false); - assert(r >= 0); - } - proxy->ioeventfd_started = false; + virtio_bus_stop_ioeventfd(&proxy->bus); } static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val) @@ -1112,24 +1084,6 @@ assign_error: return r; } -static int virtio_pci_set_host_notifier(DeviceState *d, int n, bool assign) -{ - VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); - - /* Stop using ioeventfd for virtqueue kick if the device starts using host - * notifiers. This makes it easy to avoid stepping on each others' toes. - */ - proxy->ioeventfd_disabled = assign; - if (assign) { - virtio_pci_stop_ioeventfd(proxy); - } - /* We don't need to start here: it's not needed because backend - * currently only stops on status change away from ok, - * reset, vmstop and such. If we do add code to start here, - * need to check vmstate, device state etc. */ - return virtio_pci_set_host_notifier_internal(proxy, n, assign, false); -} - static void virtio_pci_vmstate_change(DeviceState *d, bool running) { VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); @@ -2490,12 +2444,16 @@ static void virtio_pci_bus_class_init(ObjectClass *klass, void *data) k->load_extra_state = virtio_pci_load_extra_state; k->has_extra_state = virtio_pci_has_extra_state; k->query_guest_notifiers = virtio_pci_query_guest_notifiers; - k->set_host_notifier = virtio_pci_set_host_notifier; k->set_guest_notifiers = virtio_pci_set_guest_notifiers; k->vmstate_change = virtio_pci_vmstate_change; k->device_plugged = virtio_pci_device_plugged; k->device_unplugged = virtio_pci_device_unplugged; k->query_nvectors = virtio_pci_query_nvectors; + k->ioeventfd_started = virtio_pci_ioeventfd_started; + k->ioeventfd_set_started = virtio_pci_ioeventfd_set_started; + k->ioeventfd_disabled = virtio_pci_ioeventfd_disabled; + k->ioeventfd_set_disabled = virtio_pci_ioeventfd_set_disabled; + k->ioeventfd_assign = virtio_pci_ioeventfd_assign; } static const TypeInfo virtio_pci_bus_info = {