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

[Alexander Graf]

> Am 07.01.2015 um 14:52 schrieb Claudio Fontana <address@hidden>:
> 
> 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?

If I had to guess I'd say you're missing the object file in your binary. Did 
you run configure again after applying the patches?

Alex

> 
> 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
> 
> office: +49 89 158834 4135
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