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| 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/virtio/virtio-pci.c | |
| parent | 9568690868e2bcd8e35e449ac5013ca1d08968ac (diff) | |
| download | focaccia-qemu-def4c5570c44cc775c47e6d8503e4d12868f53aa.tar.gz focaccia-qemu-def4c5570c44cc775c47e6d8503e4d12868f53aa.zip | |
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/virtio/virtio-pci.c')
| -rw-r--r-- | hw/virtio/virtio-pci.c | 4 |
1 files changed, 3 insertions, 1 deletions
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++; |