On Wed, 2009-10-14 at 17:41 -0700, Rex Feany wrote: > The biggest problem for me turned out to be the MMU context IDs being > clamped to 32 when the 8xx only has 16. With this, things are a bit more > stable :)
Ugh ? The clamp went upstream ? That sucks... let me fix that asap Cheers, Ben. > diff --git a/arch/powerpc/mm/mmu_context_nohash.c > b/arch/powerpc/mm/mmu_context_nohash.c > index c2f93dc..15e00c5 100644 > --- a/arch/powerpc/mm/mmu_context_nohash.c > +++ b/arch/powerpc/mm/mmu_context_nohash.c > @@ -404,7 +404,8 @@ void __init mmu_context_init(void) > } > > #ifdef DEBUG_CLAMP_LAST_CONTEXT > - last_context = DEBUG_CLAMP_LAST_CONTEXT; > + if (last_context > DEBUG_CLAMP_LAST_CONTEXT) > + last_context = DEBUG_CLAMP_LAST_CONTEXT; > #endif > /* > * Allocate the maps used by context management > diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c > index e7dae82..26fb6b9 100644 > --- a/arch/powerpc/mm/fault.c > +++ b/arch/powerpc/mm/fault.c > @@ -40,7 +40,7 @@ > #include <asm/uaccess.h> > #include <asm/tlbflush.h> > #include <asm/siginfo.h> > - > +#include <mm/mmu_decl.h> > > #ifdef CONFIG_KPROBES > static inline int notify_page_fault(struct pt_regs *regs) > @@ -246,6 +246,12 @@ good_area: > goto bad_area; > #endif /* CONFIG_6xx */ > #if defined(CONFIG_8xx) > + /* 8xx sometimes need to load a invalid/non-present TLBs. > + * These must be invalidated separately as linux mm don't. > + */ > + if (error_code & 0x40000000) /* no translation? */ > + _tlbil_va(address, 0, 0, 0); > + > /* The MPC8xx seems to always set 0x80000000, which is > * "undefined". Of those that can be set, this is the only > * one which seems bad. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
