diff options
| author | Longpeng(Mike) <longpeng2@huawei.com> | 2022-02-22 22:11:16 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-03-15 11:26:20 +0100 |
| commit | def4c5570c44cc775c47e6d8503e4d12868f53aa (patch) | |
| tree | b880ea2ed1c6c7e15a9ccb020f083806ed65e63d /hw | |
| parent | 9568690868e2bcd8e35e449ac5013ca1d08968ac (diff) | |
kvm/msi: do explicit commit when adding msi routes
We invoke the kvm_irqchip_commit_routes() for each addition to MSI route
table, which is not efficient if we are adding lots of routes in some cases.
This patch lets callers invoke the kvm_irqchip_commit_routes(), so the
callers can decide how to optimize.
[1] https://lists.gnu.org/archive/html/qemu-devel/2021-11/msg00967.html
Signed-off-by: Longpeng <longpeng2@huawei.com>
Message-Id: <20220222141116.2091-3-longpeng2@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/misc/ivshmem.c | 5 | ||||
| -rw-r--r-- | hw/vfio/pci.c | 5 | ||||
| -rw-r--r-- | hw/virtio/virtio-pci.c | 4 |
3 files changed, 11 insertions, 3 deletions
diff --git a/hw/misc/ivshmem.c b/hw/misc/ivshmem.c index 299837e5c1..2307f4a513 100644 --- a/hw/misc/ivshmem.c +++ b/hw/misc/ivshmem.c @@ -424,16 +424,19 @@ static void ivshmem_add_kvm_msi_virq(IVShmemState *s, int vector, Error **errp) { PCIDevice *pdev = PCI_DEVICE(s); + KVMRouteChange c; int ret; IVSHMEM_DPRINTF("ivshmem_add_kvm_msi_virq vector:%d\n", vector); assert(!s->msi_vectors[vector].pdev); - ret = kvm_irqchip_add_msi_route(kvm_state, vector, pdev); + c = kvm_irqchip_begin_route_changes(kvm_state); + ret = kvm_irqchip_add_msi_route(&c, vector, pdev); if (ret < 0) { error_setg(errp, "kvm_irqchip_add_msi_route failed"); return; } + kvm_irqchip_commit_route_changes(&c); s->msi_vectors[vector].virq = ret; s->msi_vectors[vector].pdev = pdev; diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c index 7b45353ce2..d07a4e99b1 100644 --- a/hw/vfio/pci.c +++ b/hw/vfio/pci.c @@ -412,6 +412,7 @@ static int vfio_enable_vectors(VFIOPCIDevice *vdev, bool msix) static void vfio_add_kvm_msi_virq(VFIOPCIDevice *vdev, VFIOMSIVector *vector, int vector_n, bool msix) { + KVMRouteChange c; int virq; if ((msix && vdev->no_kvm_msix) || (!msix && vdev->no_kvm_msi)) { @@ -422,11 +423,13 @@ static void vfio_add_kvm_msi_virq(VFIOPCIDevice *vdev, VFIOMSIVector *vector, return; } - virq = kvm_irqchip_add_msi_route(kvm_state, vector_n, &vdev->pdev); + c = kvm_irqchip_begin_route_changes(kvm_state); + virq = kvm_irqchip_add_msi_route(&c, vector_n, &vdev->pdev); if (virq < 0) { event_notifier_cleanup(&vector->kvm_interrupt); return; } + kvm_irqchip_commit_route_changes(&c); if (kvm_irqchip_add_irqfd_notifier_gsi(kvm_state, &vector->kvm_interrupt, NULL, virq) < 0) { diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index f9cf9592fd..7cf1231c1c 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -683,10 +683,12 @@ static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy *proxy, int ret; if (irqfd->users == 0) { - ret = kvm_irqchip_add_msi_route(kvm_state, vector, &proxy->pci_dev); + KVMRouteChange c = kvm_irqchip_begin_route_changes(kvm_state); + ret = kvm_irqchip_add_msi_route(&c, vector, &proxy->pci_dev); if (ret < 0) { return ret; } + kvm_irqchip_commit_route_changes(&c); irqfd->virq = ret; } irqfd->users++; |