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Re: [Qemu-devel] [PATCH v2 2/5] pci: Add interface names to hybrid PCI d
From: |
David Gibson |
Subject: |
Re: [Qemu-devel] [PATCH v2 2/5] pci: Add interface names to hybrid PCI devices |
Date: |
Fri, 29 Sep 2017 10:35:53 +1000 |
User-agent: |
Mutt/1.9.0 (2017-09-02) |
On Thu, Sep 28, 2017 at 10:06:44AM -0300, Eduardo Habkost wrote:
> On Thu, Sep 28, 2017 at 02:08:09PM +1000, David Gibson wrote:
> > On Wed, Sep 27, 2017 at 04:56:32PM -0300, Eduardo Habkost wrote:
> > > The following devices support both PCI Express and Conventional
> > > PCI, by including special code to handle the QEMU_PCI_CAP_EXPRESS
> > > flag and/or conditional pcie_endpoint_cap_init() calls:
> > >
> > > * vfio-pci (is_express=1, but legacy PCI handled by
> > > vfio_populate_device())
> >
> > In the case of VFIO, won't this depend on the capabilities of the
> > device on the host?
>
> Yes. But the interface names are static data about the device
> type, which really supports both cases.
Ok, makes sense.
> Deciding where exactly a VFIO device can be plugged before
> running the VM will require additional data about the host, and
> that can't be provided by QEMU (because it's not running yet).
Right, obviously.
>
> >
> > > * vmxnet3 (is_express=0, but PCIe handled by vmxnet3_realize())
> > > * pvscsi (is_express=0, but PCIe handled by pvscsi_realize())
> > > * virtio-pci (is_express=0, but PCIe handled by
> > > virtio_pci_dc_realize(), and additional legacy PCI code at
> > > virtio_pci_realize())
> > > * base-xhci (is_express=1, but pcie_endpoint_cap_init() call
> > > is conditional on pci_bus_is_express(dev->bus)
> > > * Note that xhci does not clear QEMU_PCI_CAP_EXPRESS like the
> > > other hybrid devices
> > >
> > > Cc: Dmitry Fleytman <address@hidden>
> > > Cc: Jason Wang <address@hidden>
> > > Cc: Paolo Bonzini <address@hidden>
> > > Cc: Gerd Hoffmann <address@hidden>
> > > Cc: Alex Williamson <address@hidden>
> > > Cc: "Michael S. Tsirkin" <address@hidden>
> > > Signed-off-by: Eduardo Habkost <address@hidden>
> >
> > Except for the query above,
> >
> > Reviewed-by: David Gibson <address@hidden>
> >
> > > ---
> > > Changes v1 -> v2:
> > > * s/legacy/conventional/
> > > * Suggested-by: Alex Williamson <address@hidden>
> > > * Mark base-xhci as hybrid too
> > > ---
> > > hw/net/vmxnet3.c | 5 +++++
> > > hw/scsi/vmw_pvscsi.c | 2 ++
> > > hw/usb/hcd-xhci.c | 5 +++++
> > > hw/vfio/pci.c | 5 +++++
> > > hw/virtio/virtio-pci.c | 5 +++++
> > > 5 files changed, 22 insertions(+)
> > >
> > > diff --git a/hw/net/vmxnet3.c b/hw/net/vmxnet3.c
> > > index a19a7a31dd..f99d9a69ec 100644
> > > --- a/hw/net/vmxnet3.c
> > > +++ b/hw/net/vmxnet3.c
> > > @@ -2651,6 +2651,11 @@ static const TypeInfo vmxnet3_info = {
> > > .instance_size = sizeof(VMXNET3State),
> > > .class_init = vmxnet3_class_init,
> > > .instance_init = vmxnet3_instance_init,
> > > + .interfaces = (InterfaceInfo[]) {
> > > + { INTERFACE_PCIE_DEVICE },
> > > + { INTERFACE_CONVENTIONAL_PCI_DEVICE },
> > > + { }
> > > + },
> > > };
> > >
> > > static void vmxnet3_register_types(void)
> > > diff --git a/hw/scsi/vmw_pvscsi.c b/hw/scsi/vmw_pvscsi.c
> > > index 6d3f0bf11d..d6b315f8b2 100644
> > > --- a/hw/scsi/vmw_pvscsi.c
> > > +++ b/hw/scsi/vmw_pvscsi.c
> > > @@ -1300,6 +1300,8 @@ static const TypeInfo pvscsi_info = {
> > > .class_init = pvscsi_class_init,
> > > .interfaces = (InterfaceInfo[]) {
> > > { TYPE_HOTPLUG_HANDLER },
> > > + { INTERFACE_PCIE_DEVICE },
> > > + { INTERFACE_CONVENTIONAL_PCI_DEVICE },
> > > { }
> > > }
> > > };
> > > diff --git a/hw/usb/hcd-xhci.c b/hw/usb/hcd-xhci.c
> > > index d75c085d94..af3a9d88de 100644
> > > --- a/hw/usb/hcd-xhci.c
> > > +++ b/hw/usb/hcd-xhci.c
> > > @@ -3670,6 +3670,11 @@ static const TypeInfo xhci_info = {
> > > .instance_size = sizeof(XHCIState),
> > > .class_init = xhci_class_init,
> > > .abstract = true,
> > > + .interfaces = (InterfaceInfo[]) {
> > > + { INTERFACE_PCIE_DEVICE },
> > > + { INTERFACE_CONVENTIONAL_PCI_DEVICE },
> > > + { }
> > > + },
> > > };
> > >
> > > static void qemu_xhci_class_init(ObjectClass *klass, void *data)
> > > diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
> > > index 31e1edf447..913433d6ba 100644
> > > --- a/hw/vfio/pci.c
> > > +++ b/hw/vfio/pci.c
> > > @@ -3023,6 +3023,11 @@ static const TypeInfo vfio_pci_dev_info = {
> > > .class_init = vfio_pci_dev_class_init,
> > > .instance_init = vfio_instance_init,
> > > .instance_finalize = vfio_instance_finalize,
> > > + .interfaces = (InterfaceInfo[]) {
> > > + { INTERFACE_PCIE_DEVICE },
> > > + { INTERFACE_CONVENTIONAL_PCI_DEVICE },
> > > + { }
> > > + },
> > > };
> > >
> > > static void register_vfio_pci_dev_type(void)
> > > diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
> > > index 8b0d6b69cd..67c8ab63ad 100644
> > > --- a/hw/virtio/virtio-pci.c
> > > +++ b/hw/virtio/virtio-pci.c
> > > @@ -1958,6 +1958,11 @@ static const TypeInfo virtio_pci_info = {
> > > .class_init = virtio_pci_class_init,
> > > .class_size = sizeof(VirtioPCIClass),
> > > .abstract = true,
> > > + .interfaces = (InterfaceInfo[]) {
> > > + { INTERFACE_PCIE_DEVICE },
> > > + { INTERFACE_CONVENTIONAL_PCI_DEVICE },
> > > + { }
> > > + },
> > > };
> > >
> > > /* virtio-blk-pci */
> >
>
>
>
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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