4.19-stable review patch. If anyone has any objections, please let me know.
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From: Juergen Gross jgross@suse.com
commit e6111161c0a02d58919d776eec94b313bb57911f upstream.
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 Reviewed-by: Boris Ostrovsky boris.ostrovsky@oracle.com Signed-off-by: Juergen Gross jgross@suse.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- arch/x86/xen/platform-pci-unplug.c | 4 ++++ 1 file changed, 4 insertions(+)
--- a/arch/x86/xen/platform-pci-unplug.c +++ b/arch/x86/xen/platform-pci-unplug.c @@ -146,6 +146,10 @@ 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;