xen: pvhvm: allow user to request no emulated device unplug

this allows the user to disable pvhvm and revert to emulated devices
in case of a system misconfiguration (e.g. initramfs with only
emulated drivers in it).

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Acked-by: Stefano Stabellini <Stefano.Stabellini@eu.citrix.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 2c85c0692b01..8bbe83b9d0b2 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -2631,6 +2631,7 @@ and is between 256 and 4096 characters. It is defined in the file
                         all -- unplug all emulated devices (NICs and IDE disks)
                         ignore -- continue loading the Xen platform PCI driver even
                                 if the version check failed
+                        never -- do not unplug even if version check succeeds
 
         xirc2ps_cs=     [NET,PCMCIA]
                         Format: