Re: [Qemu-devel] [Xen-devel] [v2][PATCH 4/8] xen, gfx passthrough: reserve 00:02.0 for INTEL IGD

[Anthony PERARD <anthony.perard@citrix.com>]

On Fri, May 23, 2014 at 09:38:15AM +0200, Igor Mammedov wrote:
> On Fri, 23 May 2014 01:18:33 +0000
> "Chen, Tiejun" <tiejun.chen@intel.com> wrote:
> > With your patch and the following configurations,
> > 
> > gfx_passthru=1
> > pci=["00:02.0@2", "00:1a.0"]
> > xen_platform_pci=0
> > device_model_args_hvm = ['-device', 'xen-platform,addr=0x3']
> > 
> > Then,
> > 
> > tchen0@tchen0-linux:~/workspace$ sudo xl cr domu-cfg                                                                                                                   
> > Parsing config from domu-cfg
> > libxl: error: libxl_qmp.c:287:qmp_handle_error_response: received an error message from QMP server: Unsupported bus. Bus doesn't have property 'acpi-pcihp-bsel' set
> > libxl: error: libxl_create.c:1277:domcreate_attach_pci: libxl_device_pci_add failed: -3
> > tchen0@tchen0-linux:~/workspace$ cat /var/log/xen/qemu-dm-HVM.log                                                                                                      
> > char device redirected to /dev/pts/40 (label serial0)
> > acpi_pcihp_init
> > qemu: terminating on signal 1 from pid 24621
> 
> it looks like compat property "acpi-pci-hotplug-with-bridge-support"
> which is defined as 'off' for 'xenfv' machine is not applied for
> some reason.
> 
> I'd suggest to investigate a reason why compat properties don't work
> for xenfv machine.

This is because, to be able to remove the xen-platform device, we switch
the -machine from xenfv to pc,accel=xen. So in that case ,the compat
property is not applied...

-- 
Anthony PERARD