On Thu, May 30, 2013 at 03:34:27PM +1000, Michael Neuling wrote: > On context switch, we should have no prefetch streams leak from one > userspace process to another. This frees up prefetch resources for the > next process. > > Based on patch from Milton Miller. > > Signed-off-by: Michael Neuling <[email protected]> > > diff --git a/arch/powerpc/include/asm/ppc_asm.h > b/arch/powerpc/include/asm/ppc_asm.h > index cea8496..2f1b6c5 100644 > --- a/arch/powerpc/include/asm/ppc_asm.h > +++ b/arch/powerpc/include/asm/ppc_asm.h > @@ -523,6 +523,17 @@ > END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,946) > #define PPC440EP_ERR42 > #endif > > +/* The following stops all load and store data streams associated with stream > + * ID (ie. streams created explicitly). The embedded and server mnemonics > for > + * dcbt are different so we use machine "power4" here explicitly. > + */ > +#define DCBT_STOP_ALL_STREAM_IDS(scratch) \ > +.machine push ; \ > +.machine "power4" ; \ > + lis scratch,0x60000000@h; \ > + dcbt r0,scratch,0b01010; \ > +.machine pop
I don't see why we need the macro, ie. just stick this code in entry_64.S directly. cheers _______________________________________________ Linuxppc-dev mailing list [email protected] https://lists.ozlabs.org/listinfo/linuxppc-dev
