Re: [Xen-devel] [V10 PATCH 19/23] PVH xen: vmcs related changes

[Mukesh Rathor <mukesh.rathor@xxxxxxxxxx>]

On Fri, 9 Aug 2013 14:39:19 +0100
George Dunlap <George.Dunlap@xxxxxxxxxxxxx> wrote:

> On Wed, Jul 24, 2013 at 2:59 AM, Mukesh Rathor
> <mukesh.rathor@xxxxxxxxxx> wrote:
> >
> > +    /* 3. Secondary Processor-based controls (Intel SDM: resvd
> > bits are 0): */
> > +    v->arch.hvm_vmx.secondary_exec_control =
> > SECONDARY_EXEC_ENABLE_EPT;
> > +    v->arch.hvm_vmx.secondary_exec_control |=
> > SECONDARY_EXEC_ENABLE_VPID;
> 
> In construct_vmcs(), it says, "Disable VPID for now; we decide when to
> enable it on VMENTER".  Is this different somehow for PVH guests
> compared to HVM guests?
> 
>  -George

We just require VPID support, (we can remove it in future):

    if ( !cpu_has_vmx_secondary_exec_control )
    {
        printk(XENLOG_G_INFO "CPU Secondary exec is required to run
    PVH\n"); return -ENOSYS;
    }

-Mukesh

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