lkml.org 
[lkml]   [2015]   [Aug]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRE: [PATCH v7 10/17] KVM: x86: Update IRTE for posted-interrupts
Date


> -----Original Message-----
> From: Alex Williamson [mailto:alex.williamson@redhat.com]
> Sent: Wednesday, August 26, 2015 3:58 AM
> To: Wu, Feng
> Cc: pbonzini@redhat.com; joro@8bytes.org; mtosatti@redhat.com;
> eric.auger@linaro.org; kvm@vger.kernel.org;
> iommu@lists.linux-foundation.org; linux-kernel@vger.kernel.org
> Subject: Re: [PATCH v7 10/17] KVM: x86: Update IRTE for posted-interrupts
>
> On Tue, 2015-08-25 at 16:50 +0800, Feng Wu wrote:
> > This patch adds the routine to update IRTE for posted-interrupts
> > when guest changes the interrupt configuration.
> >
> > Signed-off-by: Feng Wu <feng.wu@intel.com>
> > ---
> > arch/x86/kvm/x86.c | 73
> ++++++++++++++++++++++++++++++++++++++++++++++++++++++
> > 1 file changed, 73 insertions(+)
> > + kvm_set_msi_irq(e, &irq);
> > + if (!kvm_intr_is_single_vcpu(kvm, &irq, &vcpu))
> > + continue;
> > +
> > + vcpu_info.pi_desc_addr = kvm_x86_ops->get_pi_desc_addr(vcpu);
> > + vcpu_info.vector = irq.vector;
> > +
> > + if (set)
> > + ret = irq_set_vcpu_affinity(host_irq, &vcpu_info);
> > + else {
> > + /* suppress notification event before unposting */
> > + kvm_x86_ops->pi_set_sn(vcpu);
> > + ret = irq_set_vcpu_affinity(host_irq, NULL);
> > + kvm_x86_ops->pi_clear_sn(vcpu);
> > + }
>
> Can we add trace events so that we have a way to tell when PI is being
> enabled/disabled other than performance heuristics? Thanks,

Sure, I will add it.

Thanks,
Feng

>
> Alex
> >
>

\
 
 \ /
  Last update: 2015-08-26 03:01    [W:0.094 / U:0.300 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site