[Xen-users] How to activate altp2m in using VMFUNC

[liuweijie <liuwj0129@xxxxxxx>]

Dear list,

I am a PhD student and recently I have been studying how to use VMFUNC on 
Xen-4.6.0.

I notice that when Xen creates VMCS(s) for a domain, it will disable VMFUNC and 
#VE. The comment on this part of code says VMFUNC and #VE may be enabled later 
by altp2m. I want to use vmfunc instruction on my virtual machine so I add 
‘altp2m=1’ in xen command line. Then I found the altp2m mechanism has been 
supported but not been activated.

So I am looking forward that someone could tell me how to activate altp2m. And 
I guess this altp2m is just for the CPU which supports both VMFUNC and #VE. If 
so, what should I do? I ask that because my CPU (i7-4790) only supports VMFUNC 
but not #VE. Thanks!

Best regards,
Weijie.

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