[Rust-VMM] Crate Addition Request: CPU model

[Christophe de Dinechin]

> On 11 Mar 2019, at 14:39, Paolo Bonzini <pbonzini at redhat.com> wrote:
> 
> On 11/03/19 02:31, Yi Sun wrote:
>> ## Crate Name
>> 
>> 'cpu-model'
>> 
>> ## Short Description
>> 
>> A crate to provide a generic framework which has standard interfaces
>> and flexible mechanism to support customized CPU models.
>> 
>> ## Why is this crate relevant to the rust-vmm project?
>> 
>> Customized CPU model is necessary because of below reasons.
>> 1. Avoid CPU hardware vulnerabilities.
>> 2. Keep stable guest ABI.
>> 3. Hard requirement for live migration.
> 
> What is in the definition of a CPU model?  I would expect stuff like:
> 
> 1) converting CPUID leaf (eax+ecx)/register/bit from and to a string
> 
> 2) converting MSR bit from and to a string
> 
> 3) dependencies between CPUID leaves and from CPUID leaves to MSRs
> 
> 4) XSAVE area offsets
> 
> 5) dependencies between CPUID leaves and XSAVE areas

Maybe flags to access CPUID bits by name?

> 
> Anything else?
> 
> Paolo
> 
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