Re: [GIT PULL] Add KVM support for Book3s_64 (PPC64) hosts v3

[Benjamin Herrenschmidt <benh@kernel.crashing.org>]

On Sun, 2009-07-26 at 22:47 +0200, Alexander Graf wrote:
> When we just interpret the bitmap as u64* do we break 32 on 64 x86? If  
> not, that makes it work for 32 on 64 ppc, because the kernel is always  
> 64.

It just a matter of having the bits in the right place. The kernel will
not always be 64-bit though, for example it's no for kvm/e500 or kvm/440
and there's no reason those could get gfx at some stage.

Now, the kernel -does- provide _le variants of the bitops, and those
have the side advantage of being agnostic to 32 vs. 64 bit so maybe that
what we should use everywhere ?

Look at ppc's bitops.h, it has nice descriptions of the format.

Cheers,
Ben.