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From "ASF subversion and git services (JIRA)" <>
Subject [jira] [Commented] (CLOUDSTACK-8424) KVM: allow a way to add CPU flags/features specific to a host
Date Thu, 30 Apr 2015 02:13:06 GMT


ASF subversion and git services commented on CLOUDSTACK-8424:

Commit 4334c446b55409d84ff039c6be446d437bc97171 in cloudstack's branch refs/heads/4.5 from
[;h=4334c44 ]

CLOUDSTACK-8424: enable cpu flags only for guest VMs

Signed-off-by: Rohit Yadav <>

> KVM: allow a way to add CPU flags/features specific to a host
> -------------------------------------------------------------
>                 Key: CLOUDSTACK-8424
>                 URL:
>             Project: CloudStack
>          Issue Type: Improvement
>      Security Level: Public(Anyone can view this level - this is the default.) 
>            Reporter: Rohit Yadav
>            Assignee: Rohit Yadav
>             Fix For: 4.6.0, 4.5.1
> Right now, if we want to enable CPU features such as "vmx" on KVM guest vms, there is
no way to do that. The improvement is to add a flag in per host that is specific
for a host using the property "guest.cpu.features=vmx vme" where features are space separated.
This will lead to adding <feature policy='require' name='vmx'/> in the <cpu> section
of the created XML. This can be useful to start guest VMs that need vmx, the primary purpose
is to provision nested virtualized kvm hosts on a kvm host to test CloudStack :)

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