Re: [Qemu-devel] [PATCH 0/4] ARM: Add support for a generic PCI Express host bridge

[Claudio Fontana]

Hi Alexander, happy new year!

On 06.01.2015 17:03, Alexander Graf wrote:
> Linux implements a nice binding to describe a "generic" PCI Express host 
> bridge
> using only device tree.
> 
> This patch set adds enough emulation logic to expose the parts that are
> "generic" as a simple sysbus device and maps it into ARM's virt machine.
> 
> With this patch set, we can finally spawn PCI devices on ARM VMs. I was able
> to have a fully DRM enabled virtual machine with VGA, e1000 and XHCI (for
> keyboard and mouse) up and working.
> 
> It's only a small step for QEMU, but a big step for ARM VM's usability.

I tried to test your patches, but I get in trouble quite early:

I usually run qemu-system-aarch64 for pci for OSv with the following command 
line (using the patches from Alvise):

./qemu-system-aarch64 -nographic -machine type=virt -enable-kvm -kernel 
./loader.img -cpu host -m 1024M -drive file=usr.img,if=none,id=hd0,media=disk 
-device virtio-blk-pci,id=blk0,bootindex=0,drive=hd0,scsi=off,vectors=0 -device 
virtio-rng-pci -netdev user,id=un0,net=xxx.xxx.xxx.xxx/xx,host=xxx.xxx.xxx.xxx 
-redir tcp:2222::22 -device virtio-net-pci,netdev=un0,vectors=0

and with this series I get:

qemu-system-aarch64: Unknown device 'gpex-pcihost' for default sysbus

Is there something I need to mention in the command line to enable the 
gpex-pcihost maybe?

Thank you,

Claudio


> 
> 
> Happy new year!
> 
> Alexander Graf (4):
>   pci: Split pcie_host_mmcfg_map()
>   pci: Add generic PCIe host bridge
>   arm: Add PCIe host bridge in virt machine
>   arm: enable Bochs PCI VGA
> 
>  default-configs/arm-softmmu.mak |   3 +
>  hw/arm/virt.c                   |  83 +++++++++++++++++++--
>  hw/pci-host/Makefile.objs       |   1 +
>  hw/pci-host/gpex.c              | 156 
> ++++++++++++++++++++++++++++++++++++++++
>  hw/pci/pcie_host.c              |   9 ++-
>  include/hw/pci-host/gpex.h      |  56 +++++++++++++++
>  include/hw/pci/pcie_host.h      |   1 +
>  7 files changed, 302 insertions(+), 7 deletions(-)
>  create mode 100644 hw/pci-host/gpex.c
>  create mode 100644 include/hw/pci-host/gpex.h
> 


-- 
Claudio Fontana
Server Virtualization Architect
Huawei Technologies Duesseldorf GmbH
Riesstraße 25 - 80992 München

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