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s390/memory hotplug: use pfmf instruction to initialize storage keys

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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>
This commit is contained in:
Heiko Carstens
2012-11-02 12:56:43 +01:00
committed by Martin Schwidefsky
parent 1e466fcf38
commit 6b70a92080
5 changed files with 54 additions and 52 deletions
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12
arch/s390/mm/Makefile
View File

@@ -2,9 +2,9 @@
# Makefile for the linux s390-specific parts of the memory manager.
#
obj-y := init.o fault.o extmem.o mmap.o vmem.o pgtable.o maccess.o \
page-states.o gup.o extable.o
obj-$(CONFIG_CMM) += cmm.o
obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
obj-$(CONFIG_DEBUG_SET_MODULE_RONX) += pageattr.o
obj-$(CONFIG_S390_PTDUMP) += dump_pagetables.o
obj-y := init.o fault.o extmem.o mmap.o vmem.o pgtable.o maccess.o
obj-y += page-states.o gup.o extable.o pageattr.o
obj-$(CONFIG_CMM) += cmm.o
obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
obj-$(CONFIG_S390_PTDUMP) += dump_pagetables.o

37
arch/s390/mm/pageattr.c
View File

@@ -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)
{