Re: [RFC PATCH 0/3] generic hypercall support

Arnd Bergmann
2009-05-07T20:49:21Z

On Thursday 07 May 2009, Arnd Bergmann wrote:
> An easy way to deal with the pass-through case might be to actually use
> __raw_writel there. In guest-to-guest communication, the two sides are
> known to have the same endianess (I assume) and you can still add the
> appropriate smp_mb() and such into the code.

Ok, that was nonsense. I thought you meant pass-through to a memory range
on the host that is potentially shared with other processes or guests.
For pass-through to a real device, it obviously would not work.