xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

s390/mm: do not initialize storage keys

Browse Source 
With dirty and referenced bits implemented in software it is unnecessary
to initialize the storage key for every page. With this patch not a single
storage key operation is done for a system that does not use KVM.
For KVM set_pte_at/pgste_set_key will do the initialization for the guest
view of the storage key when the mapping for the page is established in
the host.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky
2013-10-07 12:12:32 +02:00
parent 6cef30034c
commit 127c1fefff
3 changed files with 11 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
arch/s390/include/asm/page.h
View File

@@ -30,7 +30,12 @@
#include <asm/setup.h>
#ifndef __ASSEMBLY__
void storage_key_init_range(unsigned long start, unsigned long end);
static inline void storage_key_init_range(unsigned long start, unsigned long end)
{
#if PAGE_DEFAULT_KEY
__storage_key_init_range(start, end);
#endif
}
static inline void clear_page(void *page)
{