Re: [PATCH 3/6] 8xx: get rid of _PAGE_HWWRITE dependency in MMU.

Benjamin Herrenschmidt [off-list ref] wrote on 06/10/2009 08:45:47:

On Tue, 2009-10-06 at 08:15 +0200, Joakim Tjernlund wrote:

quoted

Yes, I would too but TLB Miss knows nothing about load/store, protection etc.
because DSISR isn't set. So I cannot see any other way than the TLB Error way.

Hrm... that MMU really sucks more than I thought :-(

Yeah, but at least it got a Changed bit as opposed to some other
arch mention in this mail thread :)

I'll go read the manual and think about that a bit more.

Thanks

I wonder if not much of the problems Scott and Rex are seeing are from
dcbX insn and that my fixup isn't quite working yet. I am tempted
to get the asm version working again as then I don't have to worry about
permission and get_user() et. all :)