From patchwork Thu Jul 5 15:16:30 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paolo Bonzini X-Patchwork-Id: 1161281 Return-Path: X-Original-To: patchwork-kvm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork2.kernel.org (Postfix) with ESMTP id DC350DFFCC for ; Thu, 5 Jul 2012 15:17:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933274Ab2GEPRd (ORCPT ); Thu, 5 Jul 2012 11:17:33 -0400 Received: from mail-pb0-f46.google.com ([209.85.160.46]:52063 "EHLO mail-pb0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933226Ab2GEPRb (ORCPT ); Thu, 5 Jul 2012 11:17:31 -0400 Received: by mail-pb0-f46.google.com with SMTP id rp8so12925038pbb.19 for ; Thu, 05 Jul 2012 08:17:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=sender:from:to:cc:subject:date:message-id:x-mailer:in-reply-to :references; bh=FPEcqRNu/JFB8c6ydV1XhenYiMfOD22mInzzmfQiyek=; b=dmzfhR5m5mBJ7vc0PIGj65u9X3bzBKAHIPMJmtrKKt6TCFpWnhvLhm8vJr1TBNnO0u 3yFfT6/A+NRQ5kxjoA8F3LU5ASB/E6UT1Eq7ClWQlSbEgDlvXDAr5VH4D3FPRFlc/+Hw eaiqgGPW6FGLsMkqHL6RjkG0o2xDVepqT2clK7BI5lzVWWcT8Uw4X4JguVRPhna39Cr8 25DyCAzaOC6m+OZQhs1yWwQsJ79xEpEPwtBnDkRyuHwKtgugVZpFHOKRb/6FaTImHV8L qsQyZMe9bPUx5ZnGKJ1OuGWADeE0F1vF0VqVoErHWbYEfNZk18WjFOuPE3YQ0FZuPzvX qZ6w== Received: by 10.68.240.73 with SMTP id vy9mr28193146pbc.102.1341501451182; Thu, 05 Jul 2012 08:17:31 -0700 (PDT) Received: from yakj.usersys.redhat.com (93-34-189-113.ip51.fastwebnet.it. [93.34.189.113]) by mx.google.com with ESMTPS id jv6sm19931888pbc.40.2012.07.05.08.17.27 (version=TLSv1/SSLv3 cipher=OTHER); Thu, 05 Jul 2012 08:17:30 -0700 (PDT) From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: avi@redhat.com, mtosatti@redhat.com, kvm@vger.kernel.org, anthony.perard@citrix.com, jan.kiszka@siemens.com, mst@redhat.com, stefano.stabellini@eu.citrix.com Subject: [PATCH uq/master 9/9] virtio: move common irqfd handling out of virtio-pci Date: Thu, 5 Jul 2012 17:16:30 +0200 Message-Id: <1341501390-797-10-git-send-email-pbonzini@redhat.com> X-Mailer: git-send-email 1.7.10.2 In-Reply-To: <1341501390-797-1-git-send-email-pbonzini@redhat.com> References: <1341501390-797-1-git-send-email-pbonzini@redhat.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org All transports can use the same event handler for the irqfd, though the exact mechanics of the assignment will be specific. Note that there are three states: handled by the kernel, handled in userspace, disabled. This also lets virtio use event_notifier_set_handler. Signed-off-by: Paolo Bonzini --- hw/virtio-pci.c | 37 ++++++++++--------------------------- hw/virtio.c | 24 ++++++++++++++++++++++++ hw/virtio.h | 2 ++ kvm-all.c | 10 ++++++++++ kvm-stub.c | 10 ++++++++++ kvm.h | 2 ++ 6 files changed, 58 insertions(+), 27 deletions(-) diff --git a/hw/virtio-pci.c b/hw/virtio-pci.c index 36770fd..a66c946 100644 --- a/hw/virtio-pci.c +++ b/hw/virtio-pci.c @@ -496,25 +496,15 @@ static unsigned virtio_pci_get_features(void *opaque) return proxy->host_features; } -static void virtio_pci_guest_notifier_read(void *opaque) -{ - VirtQueue *vq = opaque; - EventNotifier *n = virtio_queue_get_guest_notifier(vq); - if (event_notifier_test_and_clear(n)) { - virtio_irq(vq); - } -} - static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy *proxy, unsigned int queue_no, unsigned int vector, MSIMessage msg) { VirtQueue *vq = virtio_get_queue(proxy->vdev, queue_no); + EventNotifier *n = virtio_queue_get_guest_notifier(vq); VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; - int fd, ret; - - fd = event_notifier_get_fd(virtio_queue_get_guest_notifier(vq)); + int ret; if (irqfd->users == 0) { ret = kvm_irqchip_add_msi_route(kvm_state, msg); @@ -525,7 +515,7 @@ static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy *proxy, } irqfd->users++; - ret = kvm_irqchip_add_irqfd(kvm_state, fd, irqfd->virq); + ret = kvm_irqchip_add_irq_notifier(kvm_state, n, irqfd->virq); if (ret < 0) { if (--irqfd->users == 0) { kvm_irqchip_release_virq(kvm_state, irqfd->virq); @@ -533,8 +523,7 @@ static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy *proxy, return ret; } - qemu_set_fd_handler(fd, NULL, NULL, NULL); - + virtio_queue_set_guest_notifier_fd_handler(vq, true, true); return 0; } @@ -543,19 +532,18 @@ static void kvm_virtio_pci_vq_vector_release(VirtIOPCIProxy *proxy, unsigned int vector) { VirtQueue *vq = virtio_get_queue(proxy->vdev, queue_no); + EventNotifier *n = virtio_queue_get_guest_notifier(vq); VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; - int fd, ret; - - fd = event_notifier_get_fd(virtio_queue_get_guest_notifier(vq)); + int ret; - ret = kvm_irqchip_remove_irqfd(kvm_state, fd, irqfd->virq); + ret = kvm_irqchip_remove_irq_notifier(kvm_state, n, irqfd->virq); assert(ret == 0); if (--irqfd->users == 0) { kvm_irqchip_release_virq(kvm_state, irqfd->virq); } - qemu_set_fd_handler(fd, virtio_pci_guest_notifier_read, NULL, vq); + virtio_queue_set_guest_notifier_fd_handler(vq, true, false); } static int kvm_virtio_pci_vector_use(PCIDevice *dev, unsigned vector, @@ -617,14 +605,9 @@ static int virtio_pci_set_guest_notifier(void *opaque, int n, bool assign) if (r < 0) { return r; } - qemu_set_fd_handler(event_notifier_get_fd(notifier), - virtio_pci_guest_notifier_read, NULL, vq); + virtio_queue_set_guest_notifier_fd_handler(vq, true, false); } else { - qemu_set_fd_handler(event_notifier_get_fd(notifier), - NULL, NULL, NULL); - /* Test and clear notifier before closing it, - * in case poll callback didn't have time to run. */ - virtio_pci_guest_notifier_read(vq); + virtio_queue_set_guest_notifier_fd_handler(vq, false, false); event_notifier_cleanup(notifier); } diff --git a/hw/virtio.c b/hw/virtio.c index 197edf0..d146f86 100644 --- a/hw/virtio.c +++ b/hw/virtio.c @@ -984,6 +984,30 @@ VirtQueue *virtio_get_queue(VirtIODevice *vdev, int n) return vdev->vq + n; } +static void virtio_queue_guest_notifier_read(EventNotifier *n) +{ + VirtQueue *vq = container_of(n, VirtQueue, guest_notifier); + if (event_notifier_test_and_clear(n)) { + virtio_irq(vq); + } +} + +void virtio_queue_set_guest_notifier_fd_handler(VirtQueue *vq, bool assign, + bool with_irqfd) +{ + if (assign && !with_irqfd) { + event_notifier_set_handler(&vq->guest_notifier, + virtio_queue_guest_notifier_read); + } else { + event_notifier_set_handler(&vq->guest_notifier, NULL); + } + if (!assign) { + /* Test and clear notifier before closing it, + * in case poll callback didn't have time to run. */ + virtio_queue_guest_notifier_read(&vq->guest_notifier); + } +} + EventNotifier *virtio_queue_get_guest_notifier(VirtQueue *vq) { return &vq->guest_notifier; diff --git a/hw/virtio.h b/hw/virtio.h index 2949485..96f4dbb 100644 --- a/hw/virtio.h +++ b/hw/virtio.h @@ -231,6 +231,8 @@ void virtio_queue_set_last_avail_idx(VirtIODevice *vdev, int n, uint16_t idx); VirtQueue *virtio_get_queue(VirtIODevice *vdev, int n); int virtio_queue_get_id(VirtQueue *vq); EventNotifier *virtio_queue_get_guest_notifier(VirtQueue *vq); +void virtio_queue_set_guest_notifier_fd_handler(VirtQueue *vq, bool assign, + bool with_irqfd); EventNotifier *virtio_queue_get_host_notifier(VirtQueue *vq); void virtio_queue_set_host_notifier_fd_handler(VirtQueue *vq, bool assign); void virtio_queue_notify_vq(VirtQueue *vq); diff --git a/kvm-all.c b/kvm-all.c index 56f723e..ca0ce35 100644 --- a/kvm-all.c +++ b/kvm-all.c @@ -1163,11 +1163,21 @@ int kvm_irqchip_add_irqfd(KVMState *s, int fd, int virq) return kvm_irqchip_assign_irqfd(s, fd, virq, true); } +int kvm_irqchip_add_irq_notifier(KVMState *s, EventNotifier *n, int virq) +{ + return kvm_irqchip_add_irqfd(s, event_notifier_get_fd(n), virq); +} + int kvm_irqchip_remove_irqfd(KVMState *s, int fd, int virq) { return kvm_irqchip_assign_irqfd(s, fd, virq, false); } +int kvm_irqchip_remove_irq_notifier(KVMState *s, EventNotifier *n, int virq) +{ + return kvm_irqchip_remove_irqfd(s, event_notifier_get_fd(n), virq); +} + static int kvm_irqchip_create(KVMState *s) { QemuOptsList *list = qemu_find_opts("machine"); diff --git a/kvm-stub.c b/kvm-stub.c index ec9a364..d23b11c 100644 --- a/kvm-stub.c +++ b/kvm-stub.c @@ -147,7 +147,17 @@ int kvm_irqchip_add_irqfd(KVMState *s, int fd, int virq) return -ENOSYS; } +int kvm_irqchip_add_irq_notifier(KVMState *s, EventNotifier *n, int virq) +{ + return -ENOSYS; +} + int kvm_irqchip_remove_irqfd(KVMState *s, int fd, int virq) { return -ENOSYS; } + +int kvm_irqchip_remove_irq_notifier(KVMState *s, EventNotifier *n, int virq) +{ + return -ENOSYS; +} diff --git a/kvm.h b/kvm.h index 9c7b0ea..99003f4 100644 --- a/kvm.h +++ b/kvm.h @@ -218,4 +218,6 @@ void kvm_irqchip_release_virq(KVMState *s, int virq); int kvm_irqchip_add_irqfd(KVMState *s, int fd, int virq); int kvm_irqchip_remove_irqfd(KVMState *s, int fd, int virq); +int kvm_irqchip_add_irq_notifier(KVMState *s, EventNotifier *n, int virq); +int kvm_irqchip_remove_irq_notifier(KVMState *s, EventNotifier *n, int virq); #endif