[Xen-devel] Xen-unstable / Qemu-upstream: QMP server: Unsupported bus. Bus doesn't have property 'acpi-pcihp-bsel' set

[Sander Eikelenboom <linux@xxxxxxxxxxxxxx>]

L.S.,

It seems the xen qemu-upstream tree got updated from qemu upstream last week. 
Unfortunately a change breaks pci-passthrough for HVM's:
    libxl: error: libxl_qmp.c:287:qmp_handle_error_response: Domain 20:received 
an error message from QMP server: Unsupported bus. Bus doesn't have property 
'acpi-pcihp-bsel' set
    libxl: error: libxl_pci.c:1293:libxl__add_pcidevs: Domain 
20:libxl_device_pci_add failed: -3
    libxl: error: libxl_create.c:1458:domcreate_attach_devices: Domain 
20:unable to add pci devices
    libxl: error: libxl_domain.c:1003:libxl__destroy_domid: Domain 
20:Non-existant domain
    libxl: error: libxl_domain.c:962:domain_destroy_callback: Domain 20:Unable 
to destroy guest
    libxl: error: libxl_domain.c:889:domain_destroy_cb: Domain 20:Destruction 
of domain failed

The culprit is commit: "pc: pcihp: avoid adding ACPI_PCIHP_PROP_BSEL twice" 
(f0c9d64a68b776374ec4732424a3e27753ce37b6).
I verified that reverting this commit fixes the issue.

--
Sander

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