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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2012-11-02 15:56:43 +0400 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2012-11-23 14:14:30 +0400 |
| commit | 6b70a92080be508e16b2f53efba39e5155eff809 (patch) | |
| tree | a8bce16cd2f31284a392b29b4054230afce87168 /arch/s390/mm/pageattr.c | |
| parent | 1e466fcf3882e4c17c7df918185d0069cc334811 (diff) | |
| download | linux-6b70a92080be508e16b2f53efba39e5155eff809.tar.xz | |
s390/memory hotplug: use pfmf instruction to initialize storage keys
Move and rename init_storage_keys() to pageattr.c, so it can also be
used from the sclp memory hotplug code in order to initialize
storage keys.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/mm/pageattr.c')
| -rw-r--r-- | arch/s390/mm/pageattr.c | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/arch/s390/mm/pageattr.c b/arch/s390/mm/pageattr.c index c7ec7c2e46b0..73c3da393e88 100644 --- a/arch/s390/mm/pageattr.c +++ b/arch/s390/mm/pageattr.c @@ -2,11 +2,46 @@ * Copyright IBM Corp. 2011 * Author(s): Jan Glauber <jang@linux.vnet.ibm.com> */ +#include <linux/hugetlb.h> #include <linux/module.h> #include <linux/mm.h> -#include <linux/hugetlb.h> #include <asm/cacheflush.h> #include <asm/pgtable.h> +#include <asm/page.h> + +void storage_key_init_range(unsigned long start, unsigned long end) +{ + unsigned long boundary, function, size; + + while (start < end) { + if (MACHINE_HAS_EDAT2) { + /* set storage keys for a 2GB frame */ + function = 0x22000 | PAGE_DEFAULT_KEY; + size = 1UL << 31; + boundary = (start + size) & ~(size - 1); + if (boundary <= end) { + do { + start = pfmf(function, start); + } while (start < boundary); + continue; + } + } + if (MACHINE_HAS_EDAT1) { + /* set storage keys for a 1MB frame */ + function = 0x21000 | PAGE_DEFAULT_KEY; + size = 1UL << 20; + boundary = (start + size) & ~(size - 1); + if (boundary <= end) { + do { + start = pfmf(function, start); + } while (start < boundary); + continue; + } + } + page_set_storage_key(start, PAGE_DEFAULT_KEY, 0); + start += PAGE_SIZE; + } +} static pte_t *walk_page_table(unsigned long addr) { |