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virtio-pci: add handling of PCI ATS and Device-TLB enable/disable

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According to PCIe Address Translation Services specification 5.1.3.,
ATS Control Register has Enable bit to enable/disable ATS. Guest may
enable/disable PCI ATS and, accordingly, Device-TLB for the VirtIO PCI
device. So, raise/lower a flag and call a trigger function to pass this
event to a device implementation.

Signed-off-by: Viktor Prutyanov <viktor@daynix.com>
Message-Id: <20230512135122.70403-2-viktor@daynix.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Viktor Prutyanov 2023-05-12 16:51:20 +03:00 • committed by Michael S. Tsirkin
parent 9e57b81861
commit 206e91d143
2 changed files with 38 additions and 0 deletions
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2
include/hw/virtio/virtio.h
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@ -155,6 +155,7 @@ struct VirtIODevice
QLIST_HEAD(, VirtQueue) *vector_queues;
QTAILQ_ENTRY(VirtIODevice) next;
EventNotifier config_notifier;
bool device_iotlb_enabled;
};
struct VirtioDeviceClass {
@ -212,6 +213,7 @@ struct VirtioDeviceClass {
const VMStateDescription *vmsd;
bool (*primary_unplug_pending)(void *opaque);
struct vhost_dev *(*get_vhost)(VirtIODevice *vdev);
void (*toggle_device_iotlb)(VirtIODevice *vdev);
};
void virtio_instance_init_common(Object *proxy_obj, void *data,