Call for test [AMD erratum 793]

[Carsten Mattner]

On Fri, Sep 9, 2016 at 2:59 AM, Sepherosa Ziehau <sepherosa at gmail.com> wrote:
> AMD cpu users please help testing following patch:
> https://www.dragonflybsd.org/~sephe/0001-x86_64-Work-around-AMD-erratum-793-for-family-16h-mo.patch

I don't have an affected system, I think, but if I may:
Can you explain what the three msr lines of code do? Genuinely curious
to understand what the kernel does to circumvent the microcode bug.