Re: [PATCH 0/2] KVM: nVMX: fixes to nested virt interrupt injection

[Mike Galbraith]

On Fri, 2017-07-28 at 13:53 +0200, Paolo Bonzini wrote:
> On 28/07/2017 10:24, Mike Galbraith wrote:
> > On Fri, 2017-07-28 at 09:03 +0200, Paolo Bonzini wrote:
> >> With these two patches, KVM does not blindly pass the exit interruption
> >> info and exit qualification from the vmcs02 and vmcs12 when injecting
> >> an exception.  There were two spots where this was done, namely
> >> nested_vmx_check_exception and vmx_inject_page_fault_nested.
> >>
> >> Patch 1 avoids writing the vmcs02's VM_EXIT_INTR_ERROR_CODE field,
> >> which as Jim noticed isn't possible on pre-Haswell machines, but
> >> otherwise has no semantic effect.
> >>
> >> Patch 2 is the actual bugfix.
> > 
> > I was looking into oodles of lapic_timer.hv_timer_in_use warnings in
> > RT, introduced by KVM: LAPIC: Fix lapic timer injection delay, when I
> > noticed this post.  Happily, I can report that they are history.
> 
> This patch won't fix them.  They are a race that comes and goes---but
> yes, it's fixed.

Yes, I just discovered that they had merely gone into hiding.
(and retrieved the patch that really really makes them dead)