A Xen PVH guest has no associated qemu device model, so trying to unplug any emulated devices is making no sense at all.

Bail out early from xen_unplug_emulated_devices() when running as PVH guest. This will avoid issuing the boot message:

[ 0.000000] Xen Platform PCI: unrecognised magic value

Cc: stable@vger.kernel.org # 4.11 Signed-off-by: Juergen Gross jgross@suse.com --- arch/x86/xen/platform-pci-unplug.c | 4 ++++ 1 file changed, 4 insertions(+)

diff --git a/arch/x86/xen/platform-pci-unplug.c b/arch/x86/xen/platform-pci-unplug.c index 66ab96a4e2b3..96d7f7d39cb9 100644 --- a/arch/x86/xen/platform-pci-unplug.c +++ b/arch/x86/xen/platform-pci-unplug.c @@ -134,6 +134,10 @@ void xen_unplug_emulated_devices(void) { int r;

+ /* PVH guests don't have emulated devices. */ + if (xen_pvh_domain()) + return; + /* user explicitly requested no unplug */ if (xen_emul_unplug & XEN_UNPLUG_NEVER) return;