On Oct 29, 2007, at 5:46 PM, Benjamin Herrenschmidt wrote: > On 4xx CPUs, the current implementation of flush_tlb_page() uses > a low level _tlbie() assembly function that only works for the > current PID. Thus, invalidations caused by, for example, a COW > fault triggered by get_user_pages() from a different context will > not work properly, causing among other things, gdb breakpoints > to fail. > > This patch adds a "pid" argument to _tlbie() on 4xx processors, > and uses it to flush entries in the right context. FSL BookE > also gets the argument but it seems they don't need it (their > tlbivax form ignores the PID when invalidating according to the > document I have). > > Signed-off-by: Benjamin Herrenschmidt <[EMAIL PROTECTED]> > --- > > arch/powerpc/kernel/misc_32.S | 23 ++++++++++++++++------- > arch/powerpc/mm/fault.c | 2 +- > arch/powerpc/mm/mmu_decl.h | 4 ++-- > arch/ppc/kernel/misc.S | 22 +++++++++++++++------- > arch/ppc/mm/fault.c | 2 +- > arch/ppc/mm/mmu_decl.h | 4 ++-- > arch/ppc/platforms/4xx/ebony.c | 2 +- > arch/ppc/platforms/4xx/ocotea.c | 2 +- > arch/ppc/platforms/4xx/taishan.c | 2 +- > include/asm-powerpc/tlbflush.h | 12 ++++++------ > 10 files changed, 46 insertions(+), 29 deletions(-)
Acked-by: Kumar Gala <[EMAIL PROTECTED]> - k _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
