Re: [PATCH 0/2] KVM: VMX: clean up virtual APIC control handling

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On 01/10/2018 23:25, Sean Christopherson wrote:
> The immediate goal of this series is to fix a VMWRITE warning that
> occurs on older hardware due to accessing secondary exec controls
> when the field is not supported[1].  While inspecting the related
> code, I found that the offending commit that introduced the bug also
> unintentionally changed nested guest behavior when the FlexPriority
> module param is disabled.  KVM's handling of the FlexPriority param
> is so inconsistent and unintuitive that removing the param altogether
> seemed to be the simplest way to revert back to the previous behavior
> while keeping its bugfix intact.
> 
> [1] https://bugzilla.redhat.com/show_bug.cgi?id=1632426
> 
> Sean Christopherson (2):
>   KVM: VMX: remove kvm-intel.flexpriority module parameter
>   KVM: VMX: check for existence of secondary exec controls before
>     accessing
> 
>  .../admin-guide/kernel-parameters.txt         |  4 ---
>  arch/x86/kvm/vmx.c                            | 26 ++++++-------------
>  2 files changed, 8 insertions(+), 22 deletions(-)
> 

Queued patch 2, thanks.

Paolo



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