• Martin Schwidefsky's avatar
    s390/mm: handle asce-type exceptions as normal page fault · 127581b6
    Martin Schwidefsky authored
    Git commit 9e34f2686bb088b211b6cac8772e1f644c6180f8
    "s390/mm,tlb: tlb flush on page table upgrade fixup" removed the
    exception handler for the asce-type exception. This is incorrect
    as the user-copy with MVCOS can cause asce-type exceptions in
    the kernel if a user pointer is too large. Those need to be
    handled with do_no_context to branch to the fixup in the
    user-copy code.
    
    The simplest fix for this problem is to call do_dat_exception for
    asce-type excpetions, as there is no vma for the address the code
    will handle the exception correctly.
    Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
    127581b6
pgm_check.S 4.51 KB