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kvm: assume that many ioeventfds can be created

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NR_IOBUS_DEVS was increased to 200 in Linux 2.6.34.  By Linux 3.5 it had
increased to 1000 and later ioeventfds were changed to not count against
the limit.  But the earlier limit of 200 would already be enough for
kvm_check_many_ioeventfds() to be true, so remove the check.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2023-10-17 14:08:22 +02:00
parent d19fe67ba8
commit 5d9ec1f4c7
5 changed files with 0 additions and 58 deletions
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4
hw/virtio/virtio-pci.c
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@ -2114,10 +2114,6 @@ static void virtio_pci_realize(PCIDevice *pci_dev, Error **errp)
bool pcie_port = pci_bus_is_express(pci_get_bus(pci_dev)) &&
!pci_bus_is_root(pci_get_bus(pci_dev));
if (kvm_enabled() && !kvm_has_many_ioeventfds()) {
proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD;
}
/* fd-based ioevents can't be synchronized in record/replay */
if (replay_mode != REPLAY_MODE_NONE) {
proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD;