Re: multiple allocation for vmcs or am i missing something.

[Anthony Liguori <anthony-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>]

Manish Regmi wrote:
> When kvm initializes, it calls hardware_setup which calls
> alloc_kvm_area which allocates vmcs for each online processor and
> stores the pointer in percpu basis.
>   

VT requires a per-cpu page to store the host state in when VMLAUNCH is 
executed.  This is the host save area and it's passed to the VMXON 
instruction in hardware_enable().  It's the VMCS for the host.

Regards,

Anthony Liguori

> Later when vmx_create_vcpu is called, the vmcs area is allocated
> (again) and this time for the cpu the code is currently executing on.
> possibly it is already allocated.
>
> Is this a bug or i am missing something.
>
>
>   


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