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| author |   Michael Holzheu <michael.holzheu@linux.vnet.ibm.com> | 2009-09-22 22:58:53 +0200 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2009-09-22 22:58:46 +0200 |
| commit | 1aaf179d043856d80bbb354f9feaf706b9cfbcd3 (patch) | |
| tree | b477b19f229869f45fc9f331f308dcdb5e3b01a0 /arch/s390/include | |
| parent | [S390] dasd: tolerate devices that have no feature codes (diff) | |
| download | linux-dev-1aaf179d043856d80bbb354f9feaf706b9cfbcd3.tar.xz linux-dev-1aaf179d043856d80bbb354f9feaf706b9cfbcd3.zip | |
[S390] hibernate: Do real CPU swap at resume time
Currently, when the physical resume CPU is not equal to the physical suspend
CPU, we swap the CPUs logically, by modifying the logical/physical CPU mapping.
This has two major drawbacks: First the change is visible from user space (e.g.
CPU sysfs files) and second it is hard to ensure that nowhere in the kernel
the physical CPU ID is stored before suspend.
To fix this, we now really swap the physical CPUs, if the resume CPU is not
the pysical suspend CPU. We restart the suspend CPU and stop the resume CPU
using SIGP restart and SIGP stop. If the suspend CPU is no longer available,
we write a message and load a disabled wait PSW.
Signed-off-by: Michael Holzheu <michael.holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include')
| -rw-r--r-- | arch/s390/include/asm/lowcore.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/include/asm/lowcore.h b/arch/s390/include/asm/lowcore.h index a3ff9b01bf7d..f2ef4b619ce1 100644 --- a/arch/s390/include/asm/lowcore.h +++ b/arch/s390/include/asm/lowcore.h @@ -86,6 +86,7 @@ #define __LC_PGM_OLD_PSW 0x0150 #define __LC_MCK_OLD_PSW 0x0160 #define __LC_IO_OLD_PSW 0x0170 +#define __LC_RESTART_PSW 0x01a0 #define __LC_EXT_NEW_PSW 0x01b0 #define __LC_SVC_NEW_PSW 0x01c0 #define __LC_PGM_NEW_PSW 0x01d0 |