Re: [RFC] allow userspace to set MSR no-ops

[Avi Kivity <avi@redhat.com>]

On 11/03/2009 05:12 PM, Marcelo Tosatti wrote:
> On Wed, Oct 28, 2009 at 01:23:07PM -0400, David Windsor wrote:
>    
>> Hi,
>>
>> I've encountered a situation in which I would like to allow userspace
>> to set the MSRs which KVM should not emulate and instead implement
>> these as no-ops.
>>
>> I have not seen any work in this space, furthermore there is an item
>> on the KVM TODO that is very similar to what I'm trying to do.
>>
>> The userspace interface is an extension of kvm_vcpu_ioctl, adding the
>> KVM_SET_MSRS_NOOP flag.  It takes a struct kvm_msrs as a list of which
>> MSRs should be no-ops and adds the field noop to struct kvm_msr_entry.
>>   This patch only affects vmx, but if the approach is sane, I can
>> extend it to support svm as well.
>>      
> Does the ignore_msrs kvm.ko parameter achieve what you want?
>
>    

Ah, I forgot all about that.

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