• Aneesh Kumar K.V's avatar
    powerpc/mm: Update PROTFAULT handling in the page fault path · 18061c17
    Aneesh Kumar K.V authored
    With radix, we can get page fault with DSISR_PROTFAULT value set in case of
    PROT_NONE or autonuma mapping. The PROT_NONE case in handled by the vma check
    where we consider the access bad. For autonuma we should fall through and fixup
    the access mask correctly.
    
    Without this patch we trigger the WARN_ON() on radix. This code moves that
    WARN_ON() within a radix_enabled() check. I also moved the WARN_ON() outside
    the if condition making it apply for all type of faults (exec/write/read). It
    is also conditionalized for book3s, because BOOK3E can also get a PROTFAULT to
    handle the D/I cache sync.
    Signed-off-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
    Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
    18061c17
copro_fault.c 4.05 KB