From de82fc3e6fb8e2524aa08c757c3876b9a94e1cc7 Mon Sep 17 00:00:00 2001 From: Sasha Levin Date: Wed, 16 Nov 2011 14:24:35 +0200 Subject: [PATCH] kvm tools: Add optional callbacks for VQs This patch adds optional callbacks which get called when the VQ gets assigned an eventfd for notifications, and when it gets assigned with a GSI. This allows the device to pass the eventfds to 3rd parties which can use them to notify and get notifications regarding the VQ. Signed-off-by: Sasha Levin Signed-off-by: Pekka Enberg --- tools/kvm/include/kvm/virtio-trans.h | 2 ++ tools/kvm/virtio/pci.c | 6 ++++++ 2 files changed, 8 insertions(+) diff --git a/tools/kvm/include/kvm/virtio-trans.h b/tools/kvm/include/kvm/virtio-trans.h index d9f4b95a0b22..e7c186ee6082 100644 --- a/tools/kvm/include/kvm/virtio-trans.h +++ b/tools/kvm/include/kvm/virtio-trans.h @@ -20,6 +20,8 @@ struct virtio_ops { int (*notify_vq)(struct kvm *kvm, void *dev, u32 vq); int (*get_pfn_vq)(struct kvm *kvm, void *dev, u32 vq); int (*get_size_vq)(struct kvm *kvm, void *dev, u32 vq); + void (*notify_vq_gsi)(struct kvm *kvm, void *dev, u32 vq, u32 gsi); + void (*notify_vq_eventfd)(struct kvm *kvm, void *dev, u32 vq, u32 efd); }; struct virtio_trans_ops { diff --git a/tools/kvm/virtio/pci.c b/tools/kvm/virtio/pci.c index 1660f060446d..0737ae717673 100644 --- a/tools/kvm/virtio/pci.c +++ b/tools/kvm/virtio/pci.c @@ -51,6 +51,9 @@ static int virtio_pci__init_ioeventfd(struct kvm *kvm, struct virtio_trans *vtra ioeventfd__add_event(&ioevent); + if (vtrans->virtio_ops->notify_vq_eventfd) + vtrans->virtio_ops->notify_vq_eventfd(kvm, vpci->dev, vq, ioevent.fd); + return 0; } @@ -152,6 +155,9 @@ static bool virtio_pci__specific_io_out(struct kvm *kvm, struct virtio_trans *vt gsi = irq__add_msix_route(kvm, &vpci->msix_table[vec].msg); vpci->gsis[vpci->queue_selector] = gsi; + if (vtrans->virtio_ops->notify_vq_gsi) + vtrans->virtio_ops->notify_vq_gsi(kvm, vpci->dev, + vpci->queue_selector, gsi); break; } }; -- 2.39.5