From 6252d702c5311ce916caf75ed82e5c8245171c92 Mon Sep 17 00:00:00 2001 From: Martin Schwidefsky Date: Sat, 9 Feb 2008 18:24:37 +0100 Subject: [S390] dynamic page tables. Add support for different number of page table levels dependent on the highest address used for a process. This will cause a 31 bit process to use a two level page table instead of the four level page table that is the default after the pud has been introduced. Likewise a normal 64 bit process will use three levels instead of four. Only if a process runs out of the 4 tera bytes which can be addressed with a three level page table the fourth level is dynamically added. Then the process can use up to 8 peta byte. Signed-off-by: Martin Schwidefsky --- include/asm-s390/mmu.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/asm-s390/mmu.h') diff --git a/include/asm-s390/mmu.h b/include/asm-s390/mmu.h index 13ec4215f437..1698e29c5b20 100644 --- a/include/asm-s390/mmu.h +++ b/include/asm-s390/mmu.h @@ -5,6 +5,7 @@ typedef struct { struct list_head crst_list; struct list_head pgtable_list; unsigned long asce_bits; + unsigned long asce_limit; int noexec; } mm_context_t; -- cgit v1.2.3-70-g09d2