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hw/virtio: fix error enabling flags in Device Control register 

When the virtio devices are PCI Express, make error-enabling flags
writable to respect the PCIe 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 22:43:11 +02:00 committed by Michael S. Tsirkin
parent f03d8ea330
commit c2cabb3422
4 changed files with 21 additions and 1 deletions
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2
dtc

@ -1 +1 @@
Subproject commit 558cd81bdd432769b59bff01240c44f82cfb1a9d
Subproject commit 65cc4d2748a2c2e6f27f1cf39e07a5dbabd80ebf

12
hw/virtio/virtio-pci.c
View File

@ -1819,6 +1819,11 @@ static void virtio_pci_realize(PCIDevice *pci_dev, Error **errp)
*/
pci_set_word(pci_dev->config + pos + PCI_PM_PMC, 0x3);
if (proxy->flags & VIRTIO_PCI_FLAG_INIT_DEVERR) {
/* Init error enabling flags */
pcie_cap_deverr_init(pci_dev);
}
if (proxy->flags & VIRTIO_PCI_FLAG_ATS) {
pcie_ats_init(pci_dev, 256);
}
@ -1849,6 +1854,7 @@ static void virtio_pci_reset(DeviceState *qdev)
{
VirtIOPCIProxy *proxy = VIRTIO_PCI(qdev);
VirtioBusState *bus = VIRTIO_BUS(&proxy->bus);
PCIDevice *dev = PCI_DEVICE(qdev);
int i;
virtio_pci_stop_ioeventfd(proxy);
@ -1862,6 +1868,10 @@ static void virtio_pci_reset(DeviceState *qdev)
proxy->vqs[i].avail[0] = proxy->vqs[i].avail[1] = 0;
proxy->vqs[i].used[0] = proxy->vqs[i].used[1] = 0;
}
if (pci_is_express(dev)) {
pcie_cap_deverr_reset(dev);
}
}
static Property virtio_pci_properties[] = {
@ -1882,6 +1892,8 @@ static Property virtio_pci_properties[] = {
ignore_backend_features, false),
DEFINE_PROP_BIT("ats", VirtIOPCIProxy, flags,
VIRTIO_PCI_FLAG_ATS_BIT, false),
DEFINE_PROP_BIT("x-pcie-deverr-init", VirtIOPCIProxy, flags,
VIRTIO_PCI_FLAG_INIT_DEVERR_BIT, true),
DEFINE_PROP_END_OF_LIST(),
};

4
hw/virtio/virtio-pci.h
View File

@ -73,6 +73,7 @@ enum {
VIRTIO_PCI_FLAG_DISABLE_PCIE_BIT,
VIRTIO_PCI_FLAG_PAGE_PER_VQ_BIT,
VIRTIO_PCI_FLAG_ATS_BIT,
VIRTIO_PCI_FLAG_INIT_DEVERR_BIT,
};
/* Need to activate work-arounds for buggy guests at vmstate load. */
@ -100,6 +101,9 @@ enum {
/* address space translation service */
#define VIRTIO_PCI_FLAG_ATS (1 << VIRTIO_PCI_FLAG_ATS_BIT)
/* Init error enabling flags */
#define VIRTIO_PCI_FLAG_INIT_DEVERR (1 << VIRTIO_PCI_FLAG_INIT_DEVERR_BIT)
typedef struct {
MSIMessage msg;
int virq;

4
include/hw/compat.h
View File

@ -22,6 +22,10 @@
.driver = TYPE_PCI_DEVICE,\
.property = "x-pcie-extcap-init",\
.value = "off",\
},{\
.driver = "virtio-pci",\
.property = "x-pcie-deverr-init",\
.value = "off",\
},
#define HW_COMPAT_2_7 \