Re: New CPUID/MSR driver; virtualization hooks

[Zachary Amsden <zach@vmware.com>]

H. Peter Anvin wrote:
>
> It seems to me that perhaps this is the way to do it:
>
> - Add cpuid_everything, rdmsr_everything and wrmsr_everything
>   entrypoints;

Yes, although I think we can omit rdmsr / wrmsr.

>
> - Provide compatibility wrappers that simply invoke the cpuid, rdmsr,
>   and wrmsr entrypoints with appropriate parameter marshalling;
>
> - On hardware, point them to the functions which invoke setgpr_wrapper.
>
> What do you think?

Well it is more work than the hack, but it is more maintainable and 
makes for less assembly code - we could do all the parameter juggling in 
C for the paravirt-ops case.

Zach