Re: [Xen-devel] [RFC v1 14/15] Suppress posting interrupts when 'SN' is set

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 27/03/15 03:00, Wu, Feng wrote:
> > >    static void vmx_deliver_posted_intr(struct vcpu *v, u8 vector)
> > >    {
> > > +    int r, sn;
> > > +
> > >        if ( pi_test_and_set_pir(vector, &v->arch.hvm_vmx.pi_desc) )
> > >            return;
> > >
> > > +    /*
> > > +     * Currently, we don't support urgent interrupt, all interrupts
> > > +     * are recognized as non-urgent interrupt, so we cannot send
> > > +     * posted-interrupt when 'SN' is set.
> > > +     */
> > > +
> > > +    sn = pi_test_sn(&v->arch.hvm_vmx.pi_desc);
> > Is there anywhere which sets sn at all? I cant spot anywhere.
> SN is set in [13/15] while vCPU is going to runnable state.
Then please do not set SN in the first place if we don't support it.

~Andrew

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