Re: [Qemu-devel] [Bug 1187529] [PATCH] Update mappings after PCI bridge live migration or save-restore.

[Michael S. Tsirkin]

On Wed, Jul 03, 2013 at 11:04:16AM -0400, Don Koch wrote:
> From: Don Koch <address@hidden>
> 
> Update mappings for PCI bridge after live migration.
> 
> Signed-off-by: Don Koch <address@hidden>
> ---
> This fixes bug 1187529: devices on a PCI bridge stop working after migration.

Thanks, this looks good, but any bridge device would
need this fix, won't it?
Could we call this from get_pci_config_device instead?
This way all bridge devices would be fixed.


>  hw/pci-bridge/pci_bridge_dev.c | 9 +++++++++
>  hw/pci/pci_bridge.c            | 2 +-
>  include/hw/pci/pci_bridge.h    | 1 +
>  3 files changed, 11 insertions(+), 1 deletion(-)
> 
> diff --git a/hw/pci-bridge/pci_bridge_dev.c b/hw/pci-bridge/pci_bridge_dev.c
> index 971b432..9e5062e 100644
> --- a/hw/pci-bridge/pci_bridge_dev.c
> +++ b/hw/pci-bridge/pci_bridge_dev.c
> @@ -110,6 +110,14 @@ static void qdev_pci_bridge_dev_reset(DeviceState *qdev)
>      shpc_reset(dev);
>  }
>  
> +static int pci_bridge_dev_post_load(void *opaque, int ver) {
> +    PCIDevice *d = opaque;
> +    PCIBridge *s = container_of(d, PCIBridge, dev);
> +
> +    pci_bridge_update_mappings(s);
> +    return 0;
> +}
> +
>  static Property pci_bridge_dev_properties[] = {
>                      /* Note: 0 is not a legal chassis number. */
>      DEFINE_PROP_UINT8("chassis_nr", PCIBridgeDev, chassis_nr, 0),
> @@ -119,6 +127,7 @@ static Property pci_bridge_dev_properties[] = {
>  
>  static const VMStateDescription pci_bridge_dev_vmstate = {
>      .name = "pci_bridge",
> +    .post_load = pci_bridge_dev_post_load,
>      .fields = (VMStateField[]) {
>          VMSTATE_PCI_DEVICE(bridge.dev, PCIBridgeDev),
>          SHPC_VMSTATE(bridge.dev.shpc, PCIBridgeDev),
> diff --git a/hw/pci/pci_bridge.c b/hw/pci/pci_bridge.c
> index 24be6c5..3897bd8 100644
> --- a/hw/pci/pci_bridge.c
> +++ b/hw/pci/pci_bridge.c
> @@ -224,7 +224,7 @@ static void pci_bridge_region_cleanup(PCIBridge *br, 
> PCIBridgeWindows *w)
>      g_free(w);
>  }
>  
> -static void pci_bridge_update_mappings(PCIBridge *br)
> +void pci_bridge_update_mappings(PCIBridge *br)
>  {
>      PCIBridgeWindows *w = br->windows;
>  
> diff --git a/include/hw/pci/pci_bridge.h b/include/hw/pci/pci_bridge.h
> index 1868f7a..1d8f997 100644
> --- a/include/hw/pci/pci_bridge.h
> +++ b/include/hw/pci/pci_bridge.h
> @@ -37,6 +37,7 @@ PCIBus *pci_bridge_get_sec_bus(PCIBridge *br);
>  pcibus_t pci_bridge_get_base(const PCIDevice *bridge, uint8_t type);
>  pcibus_t pci_bridge_get_limit(const PCIDevice *bridge, uint8_t type);
>  
> +void pci_bridge_update_mappings(PCIBridge *br);
>  void pci_bridge_write_config(PCIDevice *d,
>                               uint32_t address, uint32_t val, int len);
>  void pci_bridge_disable_base_limit(PCIDevice *dev);
> -- 
> 1.7.11.7