On 30/09/2015 04:13, David Gibson wrote:
> The Enhanced Error Handling (EEH) interface in PAPR operates on units of a
> Partitionable Endpoint (PE). For VFIO devices, the PE boundaries the guest
> sees must match the PE (i.e. IOMMU group) boundaries on the host. To
> implement this it will need to discover from VFIO which group a given
> device belongs to.
>
> This exposes a new vfio_pci_device_group() function for this purpose.
>
> Signed-off-by: David Gibson <da...@gibson.dropbear.id.au>
> ---
> hw/vfio/pci.c | 14 ++++++++++++++
> include/hw/vfio/vfio-pci.h | 11 +++++++++++
> 2 files changed, 25 insertions(+)
> create mode 100644 include/hw/vfio/vfio-pci.h
>
> diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
> index dcabb6d..49ae834 100644
> --- a/hw/vfio/pci.c
> +++ b/hw/vfio/pci.c
> @@ -35,6 +35,8 @@
> #include "pci.h"
> #include "trace.h"
>
> +#include "hw/vfio/vfio-pci.h"
> +
> #define MSIX_CAP_LENGTH 12
>
> static void vfio_disable_interrupts(VFIOPCIDevice *vdev);
> @@ -2312,6 +2314,18 @@ static void vfio_unregister_req_notifier(VFIOPCIDevice
> *vdev)
> vdev->req_enabled = false;
> }
>
> +VFIOGroup *vfio_pci_device_group(PCIDevice *pdev)
> +{
> + VFIOPCIDevice *vdev;
> +
> + if (!object_dynamic_cast(OBJECT(pdev), "vfio-pci")) {
> + return NULL;
> + }
> +
> + vdev = DO_UPCAST(VFIOPCIDevice, pdev, pdev);
> + return vdev->vbasedev.group;
> +}
> +
> static int vfio_initfn(PCIDevice *pdev)
> {
> VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, pdev);
> diff --git a/include/hw/vfio/vfio-pci.h b/include/hw/vfio/vfio-pci.h
> new file mode 100644
> index 0000000..32105f7
> --- /dev/null
> +++ b/include/hw/vfio/vfio-pci.h
> @@ -0,0 +1,11 @@
> +#ifndef VFIO_PCI_H
> +#define VFIO_PCI_H
> +
> +#include "qemu/typedefs.h"
> +
> +/* We expose the concept of a VFIOGroup, though not its internals */
> +typedef struct VFIOGroup VFIOGroup;
> +
> +extern VFIOGroup *vfio_pci_device_group(PCIDevice *pdev);
> +
> +#endif /* VFIO_PCI_H */
>
Reviewed-by: Laurent Vivier <lviv...@redhat.com>
