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https://issues.apache.org/jira/browse/CLOUDSTACK-10232?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16372981#comment-16372981
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ASF GitHub Bot commented on CLOUDSTACK-10232:
---------------------------------------------

rhtyd commented on a change in pull request #2465: CLOUDSTACK-10232: SystemVMs 
and VR to run as HVM on XenServer
URL: https://github.com/apache/cloudstack/pull/2465#discussion_r170005233
 
 

 ##########
 File path: systemvm/debian/opt/cloud/bin/setup/cloud-early-config
 ##########
 @@ -42,7 +42,14 @@ hypervisor() {
   grep -q QEMU /var/log/messages && echo "kvm" && return 0
 
   [ -d /proc/xen ] && mount -t xenfs none /proc/xen
-  [ -d /proc/xen ] && echo "xen-domU" && return 0
+  if [ -d /proc/xen ]; then
+    `dmesg | grep -q "Xen HVM"`
 
 Review comment:
   For consistency, can you use this instead $(command here)?

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> SystemVMs and VR to run as HVM on XenServer
> -------------------------------------------
>
>                 Key: CLOUDSTACK-10232
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-10232
>             Project: CloudStack
>          Issue Type: New Feature
>      Security Level: Public(Anyone can view this level - this is the 
> default.) 
>          Components: SystemVM, Virtual Router, XenServer
>    Affects Versions: 4.10.0.0, 4.9.3.0
>            Reporter: Pierre-Luc Dion
>            Priority: Major
>
> Following the recent Meltdown-Spectre security risk,one of the mitigation,as 
> of Jan 2018, for XenServer Hypervisor is to run Virtual-Machine in HVM mode.
> Currently SystemVMs and Virtual-Routers run as PV on XenServer and the eth0 
> is configured using {{/etc/init.d/cloud-early-config}} using grub params from 
> {{/proc/cmdline}}. When VM run as HVM, it is not possible to push initial 
> boot instruction via pygrub.
> Quick tests has been done using xenstore and it look like it would be 
> possible to send same initial boot instruction has pygrub but using xenstore 
> for HVM instances.



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