mirror of
https://github.com/adulau/aha.git
synced 2024-12-29 12:16:20 +00:00
155af2f95f
This patch introduces the hibernation backend support to the s390 architecture. Now it is possible to suspend a mainframe Linux guest using the following command: echo disk > /sys/power/state Signed-off-by: Hans-Joachim Picht <hans@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
40 lines
1,002 B
C
40 lines
1,002 B
C
/*
|
|
* Suspend support specific for s390.
|
|
*
|
|
* Copyright IBM Corp. 2009
|
|
*
|
|
* Author(s): Hans-Joachim Picht <hans@linux.vnet.ibm.com>
|
|
*/
|
|
|
|
#include <linux/mm.h>
|
|
#include <linux/suspend.h>
|
|
#include <linux/reboot.h>
|
|
#include <linux/pfn.h>
|
|
#include <asm/sections.h>
|
|
#include <asm/ipl.h>
|
|
|
|
/*
|
|
* References to section boundaries
|
|
*/
|
|
extern const void __nosave_begin, __nosave_end;
|
|
|
|
/*
|
|
* check if given pfn is in the 'nosave' or in the read only NSS section
|
|
*/
|
|
int pfn_is_nosave(unsigned long pfn)
|
|
{
|
|
unsigned long nosave_begin_pfn = __pa(&__nosave_begin) >> PAGE_SHIFT;
|
|
unsigned long nosave_end_pfn = PAGE_ALIGN(__pa(&__nosave_end))
|
|
>> PAGE_SHIFT;
|
|
unsigned long eshared_pfn = PFN_DOWN(__pa(&_eshared)) - 1;
|
|
unsigned long stext_pfn = PFN_DOWN(__pa(&_stext));
|
|
|
|
if (pfn >= nosave_begin_pfn && pfn < nosave_end_pfn)
|
|
return 1;
|
|
if (pfn >= stext_pfn && pfn <= eshared_pfn) {
|
|
if (ipl_info.type == IPL_TYPE_NSS)
|
|
return 1;
|
|
} else if ((tprot(pfn * PAGE_SIZE) && pfn > 0))
|
|
return 1;
|
|
return 0;
|
|
}
|