Re: [PATCH] KVM: VMX: require virtual NMI support

From	Paolo Bonzini <pbonzini@redhat.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH] KVM: VMX: require virtual NMI support
Date	2017-09-13 22:40 +0200
Message-ID	<upmBX-3I6-15@gated-at.bofh.it> (permalink)
References	<tpC6e-83W-1@gated-at.bofh.it> <upjE5-1RR-13@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On 13/09/2017 19:23, Zdenek Kaspar wrote:
> On 03/27/2017 02:38 PM, Paolo Bonzini wrote:
>> Virtual NMIs are only missing in Prescott and Yonah chips.  Both are obsolete
>> for virtualization usage---Yonah is 32-bit only even---so drop vNMI emulation.
>>
>> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
>> ---
>>  arch/x86/kvm/vmx.c | 143 ++++++++++++++---------------------------------------
>>  1 file changed, 38 insertions(+), 105 deletions(-)
> 
> This breaks virtualization on old Intel Core2 machines.
> Any chance to revert?

Already planned for 4.14 and future 4.13 stable kernels, but haven't
gotten round to it.

Paolo

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Re: [PATCH] KVM: VMX: require virtual NMI support Zdenek Kaspar <zkaspar82@gmail.com> - 2017-09-13 19:30 +0200
  Re: [PATCH] KVM: VMX: require virtual NMI support Paolo Bonzini <pbonzini@redhat.com> - 2017-09-13 22:40 +0200

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