Re: [PATCH v2 0/7] KVM: nVMX: Fix IPIv vs. nested posted interrupts

From: Nathan Chancellor
Date: Tue Sep 10 2024 - 12:22:51 EST


On Mon, Sep 09, 2024 at 09:56:42PM -0700, Sean Christopherson wrote:
> On Thu, 05 Sep 2024 21:34:06 -0700, Sean Christopherson wrote:
> > Fix a bug where KVM injects L2's nested posted interrupt into L1 as a
> > nested VM-Exit instead of triggering PI processing. The actual bug is
> > technically a generic nested posted interrupts problem, but due to the
> > way that KVM handles interrupt delivery, the issue is mostly limited to
> > to IPI virtualization being enabled.
> >
> > Found by the nested posted interrupt KUT test on SPR.
> >
> > [...]
>
> Trying this again, hopefully with less awful testing this time...

I meant to reply yesterday but I guess I lost track of time. This passed
my testing on all my machines, so it is not as bad as last time :)

Cheers,
Nathan