From: Juergen Gross <jgross@suse.com>
Date: Thu, 25 Oct 2018 09:54:15 +0200
Patch-mainline: 4.20-rc1
Git-commit: e6111161c0a02d58919d776eec94b313bb57911f
References: bnc#1065600
Subject: [PATCH] xen/pvh: don't try to unplug emulated devices
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>
---
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;
--
2.16.4