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

From	Mike Galbraith <efault@gmx.de>
Newsgroups	linux.kernel
Subject	Re: [PATCH 0/2] KVM: nVMX: fixes to nested virt interrupt injection
Date	2017-07-28 14:10 +0200
Message-ID	<u8cfD-3AM-5@gated-at.bofh.it> (permalink)
References	<u87zj-z3-13@gated-at.bofh.it> <u88OL-1fB-13@gated-at.bofh.it> <u8c5Y-3fm-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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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)

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[PATCH 0/2] KVM: nVMX: fixes to nested virt interrupt injection Paolo Bonzini <pbonzini@redhat.com> - 2017-07-28 09:10 +0200
  [PATCH 2/2] KVM: nVMX: fixes to nested virt interrupt injection Paolo Bonzini <pbonzini@redhat.com> - 2017-07-28 09:20 +0200
  Re: [PATCH 0/2] KVM: nVMX: fixes to nested virt interrupt injection Mike Galbraith <efault@gmx.de> - 2017-07-28 10:30 +0200
    Re: [PATCH 0/2] KVM: nVMX: fixes to nested virt interrupt injection Wanpeng Li <kernellwp@gmail.com> - 2017-07-28 11:10 +0200
    Re: [PATCH 0/2] KVM: nVMX: fixes to nested virt interrupt injection Paolo Bonzini <pbonzini@redhat.com> - 2017-07-28 14:00 +0200
      Re: [PATCH 0/2] KVM: nVMX: fixes to nested virt interrupt injection Mike Galbraith <efault@gmx.de> - 2017-07-28 14:10 +0200

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