Re: [PATCH] rdmsr_on_cpu, wrmsr_on_cpu

[H. Peter Anvin]

Andi Kleen wrote:
> > HOWEVER -- and this is where things get gnarly -- the CPUID and MSR
> > drivers would really like to be able to execute CPUID, WRMSR and RDMSR
> > with the entire GPR register set (except the stack pointer) pre-set and
> > post-captured, since it's highly likely that there are going to be
> > nonstandard MSRs and CPUID levels (already witness Intel breaking the
> > CPUID architecture by introducing %ecx dependencies.)
>
> That looks like such a specialized requirement that I would suggest 
> you keep that in the drivers. The interface for most users would be just
> too ugly

It would, but rather than having the paravirtualization interfaces 
duplicate out of control, we could/should implement the less generic 
features in terms of the more generic, above the pvz layer.

	-hpa
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/