Re: Device assignment hotplug broken

[Sheng Yang <sheng@linux.intel.com>]

On Tuesday 30 June 2009 20:28:08 Markus Armbruster wrote:
> Sheng Yang <sheng@linux.intel.com> writes:
> > On Friday 26 June 2009 01:24:03 Avi Kivity wrote:
> >> The impact of the hotplug changes on device assignment were too
> >> difficult for me to fix up during the merge, so I disabled it
> >> temporarily.  Please take a look at qemu-kvm.git commit a3b371477e3.
> >
> > When the device assignment can come back? 4 day passed and no message
> > from Markus Armbruster till now.
>
> I'm having difficulties testing my patch.  If it works for you, please
> let me know.  Once I'm satisfied it works, I'll post it properly.

Hi Markus

In my (limited) test, the patch works well.

Thanks!
-- 
regards
Yang, Sheng

> diff --git a/hw/device-assignment.c b/hw/device-assignment.c
> index e282498..88c3baf 100644
> --- a/hw/device-assignment.c
> +++ b/hw/device-assignment.c
> @@ -1126,9 +1126,8 @@ static int
> assigned_dev_register_msix_mmio(AssignedDevice *dev) struct PCIDevice
> *init_assigned_device(AssignedDevInfo *adev,
>                                         const char *devaddr)
>  {
> -    printf("init_assigned_device: fix me please\n");
> -    return NULL;
> -#if 0
> +    PCIBus *bus;
> +    int devfn;
>      int r;
>      AssignedDevice *dev;
>      PCIDevice *pci_dev;
> @@ -1138,8 +1137,9 @@ struct PCIDevice
> *init_assigned_device(AssignedDevInfo *adev, DEBUG("Registering real
> physical device %s (bus=%x dev=%x func=%x)\n", adev->name, adev->bus,
> adev->dev, adev->func);
>
> +    bus = pci_get_bus_devfn(&devfn, devaddr);
>      pci_dev = pci_register_device(bus, adev->name,
> -              sizeof(AssignedDevice), -1, assigned_dev_pci_read_config,
> +              sizeof(AssignedDevice), devfn, assigned_dev_pci_read_config,
>                assigned_dev_pci_write_config);
>      dev = container_of(pci_dev, AssignedDevice, dev);
>
> @@ -1203,7 +1203,6 @@ assigned_out:
>  out:
>      free_assigned_device(adev);
>      return NULL;
> -#endif
>  }
>
>  /*
> @@ -1268,7 +1267,7 @@ void add_assigned_devices(PCIBus *bus, const char
> **devices, int n_devices) exit(1);
>          }
>
> -        if (!init_assigned_device(adev, bus)) {
> +        if (!init_assigned_device(adev, NULL)) {
>              fprintf(stderr, "Failed to initialize assigned device %s\n",
>                      devices[i]);
>              exit(1);
> diff --git a/hw/pci.c b/hw/pci.c
> index 618582a..0107096 100644
> --- a/hw/pci.c
> +++ b/hw/pci.c
> @@ -290,7 +290,7 @@ int pci_read_devaddr(const char *addr, int *domp, int
> *busp, unsigned *slotp) return pci_parse_devaddr(devaddr, domp, busp,
> slotp);
>  }
>
> -static PCIBus *pci_get_bus_devfn(int *devfnp, const char *devaddr)
> +PCIBus *pci_get_bus_devfn(int *devfnp, const char *devaddr)
>  {
>      int dom, bus;
>      unsigned slot;
> diff --git a/hw/pci.h b/hw/pci.h
> index 7d8df83..a2c3a23 100644
> --- a/hw/pci.h
> +++ b/hw/pci.h
> @@ -239,6 +239,7 @@ int pci_read_devaddr(const char *addr, int *domp, int
> *busp, unsigned *slotp);
>
>  int pci_parse_host_devaddr(const char *addr, int *busp,
>                             int *slotp, int *funcp);
> +PCIBus *pci_get_bus_devfn(int *devfnp, const char *devaddr);
>
>  void pci_info(Monitor *mon);
>  PCIBus *pci_bridge_init(PCIBus *bus, int devfn, uint16_t vid, uint16_t
> did,