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| author | Hans-Joachim Picht <hans@linux.vnet.ibm.com> | 2009-06-16 10:30:52 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2009-06-16 10:31:22 +0200 |
| commit | 155af2f95f905c830688dd0ca7c7cac4107334fd (patch) | |
| tree | 4304a39e713d1594903e838830c4029715cc7a2a /arch/s390/include/asm | |
| parent | c369527f18f8560bd3580be2676cb55b54b02ee6 (diff) | |
| download | kernel-crypto-155af2f95f905c830688dd0ca7c7cac4107334fd.tar.gz kernel-crypto-155af2f95f905c830688dd0ca7c7cac4107334fd.tar.xz kernel-crypto-155af2f95f905c830688dd0ca7c7cac4107334fd.zip | |
[S390] s390: hibernation support for s390
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>
Diffstat (limited to 'arch/s390/include/asm')
| -rw-r--r-- | arch/s390/include/asm/suspend.h | 10 | ||||
| -rw-r--r-- | arch/s390/include/asm/system.h | 22 |
2 files changed, 26 insertions, 6 deletions
diff --git a/arch/s390/include/asm/suspend.h b/arch/s390/include/asm/suspend.h new file mode 100644 index 00000000000..dc75c616eaf --- /dev/null +++ b/arch/s390/include/asm/suspend.h @@ -0,0 +1,10 @@ +#ifndef __ASM_S390_SUSPEND_H +#define __ASM_S390_SUSPEND_H + +static inline int arch_prepare_suspend(void) +{ + return 0; +} + +#endif + diff --git a/arch/s390/include/asm/system.h b/arch/s390/include/asm/system.h index 3a8b26eb1f2..4fb83c1cdb7 100644 --- a/arch/s390/include/asm/system.h +++ b/arch/s390/include/asm/system.h @@ -1,11 +1,7 @@ /* - * include/asm-s390/system.h + * Copyright IBM Corp. 1999, 2009 * - * S390 version - * Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation - * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com), - * - * Derived from "include/asm-i386/system.h" + * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com> */ #ifndef __ASM_SYSTEM_H @@ -469,6 +465,20 @@ extern psw_t sysc_restore_trace_psw; extern psw_t io_restore_trace_psw; #endif +static inline int tprot(unsigned long addr) +{ + int rc = -EFAULT; + + asm volatile( + " tprot 0(%1),0\n" + "0: ipm %0\n" + " srl %0,28\n" + "1:\n" + EX_TABLE(0b,1b) + : "+d" (rc) : "a" (addr) : "cc"); + return rc; +} + #endif /* __KERNEL__ */ #endif |