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hw/virtio: fix Link Control Register for PCI Express virtio devices

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Make several Link Control Register flags writable to conform
with the PCI Express spec.

Signed-off-by: Marcel Apfelbaum <marcel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Marcel Apfelbaum 2017-02-20 22:43:12 +02:00 • committed by Michael S. Tsirkin
parent c2cabb3422
commit d584f1b9ca
5 changed files with 33 additions and 0 deletions
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8
hw/virtio/virtio-pci.c
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@ -1824,6 +1824,11 @@ static void virtio_pci_realize(PCIDevice *pci_dev, Error **errp)
pcie_cap_deverr_init(pci_dev);
}
if (proxy->flags & VIRTIO_PCI_FLAG_INIT_LNKCTL) {
/* Init Link Control Register */
pcie_cap_lnkctl_init(pci_dev);
}
if (proxy->flags & VIRTIO_PCI_FLAG_ATS) {
pcie_ats_init(pci_dev, 256);
}
@ -1871,6 +1876,7 @@ static void virtio_pci_reset(DeviceState *qdev)
if (pci_is_express(dev)) {
pcie_cap_deverr_reset(dev);
pcie_cap_lnkctl_reset(dev);
}
}
@ -1894,6 +1900,8 @@ static Property virtio_pci_properties[] = {
VIRTIO_PCI_FLAG_ATS_BIT, false),
DEFINE_PROP_BIT("x-pcie-deverr-init", VirtIOPCIProxy, flags,
VIRTIO_PCI_FLAG_INIT_DEVERR_BIT, true),
DEFINE_PROP_BIT("x-pcie-lnkctl-init", VirtIOPCIProxy, flags,
VIRTIO_PCI_FLAG_INIT_LNKCTL_BIT, true),
DEFINE_PROP_END_OF_LIST(),
};