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xen/pvh: don't try to unplug emulated devices

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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>
This commit is contained in:
Juergen Gross 2018-10-25 09:54:15 +02:00
parent 769d6bfc74
commit e6111161c0
1 changed files with 4 additions and 0 deletions
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4
arch/x86/xen/platform-pci-unplug.c
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@ -134,6 +134,10 @@ void xen_unplug_emulated_devices(void)
{ {
int r; int r;
/* PVH guests don't have emulated devices. */
if (xen_pvh_domain())
return;
/* user explicitly requested no unplug */ /* user explicitly requested no unplug */
if (xen_emul_unplug & XEN_UNPLUG_NEVER) if (xen_emul_unplug & XEN_UNPLUG_NEVER)
return; return;