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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2008-01-26 14:10:56 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2008-01-26 14:11:09 +0100 |
| commit | 08d07968277cd898c88bf12b7720d89c02c4f139 (patch) | |
| tree | 1c91768976c389883842eb7650141e93b7dbe334 /drivers/s390/char/sclp.h | |
| parent | [S390] sclp: sysfs interface for SCLP cpi (diff) | |
| download | linux-08d07968277cd898c88bf12b7720d89c02c4f139.tar.xz linux-08d07968277cd898c88bf12b7720d89c02c4f139.zip | |
[S390] Standby cpu activation/deactivation.
Add a new interface so that cpus can be put into standby state and
configured state.
Only offline cpus can be put into standby state or configured state.
For that the new percpu sysfs attribute "configure" must be used.
To put a cpu in standby state a "0" must be written to the attribute.
In order to switch it into configured state a "1" must be written to
the attribute.
Only cpus in configured state can be brought online.
In addition this patch introduces a static mapping of physical to
logical cpus. As a result only the sysfs directories of present cpus
will be created. To scan for new cpus the new sysfs attribute "rescan"
must be used.
Writing to /sys/devices/system/cpu/rescan will trigger a rescan of
cpus and will create directories for new cpus.
On IPL only configured cpus will be used. And on reboot/shutdown all
cpus will remain in their current state (configured/standby).
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/char/sclp.h')
| -rw-r--r-- | drivers/s390/char/sclp.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/s390/char/sclp.h b/drivers/s390/char/sclp.h index c7318a125852..aa8186d18aee 100644 --- a/drivers/s390/char/sclp.h +++ b/drivers/s390/char/sclp.h @@ -56,8 +56,6 @@ typedef unsigned int sclp_cmdw_t; #define SCLP_CMDW_READ_EVENT_DATA 0x00770005 #define SCLP_CMDW_WRITE_EVENT_DATA 0x00760005 #define SCLP_CMDW_WRITE_EVENT_MASK 0x00780005 -#define SCLP_CMDW_READ_SCP_INFO 0x00020001 -#define SCLP_CMDW_READ_SCP_INFO_FORCED 0x00120001 #define GDS_ID_MDSMU 0x1310 #define GDS_ID_MDSROUTEINFO 0x1311 @@ -83,6 +81,8 @@ extern u64 sclp_facilities; #define SCLP_HAS_CHP_INFO (sclp_facilities & 0x8000000000000000ULL) #define SCLP_HAS_CHP_RECONFIG (sclp_facilities & 0x2000000000000000ULL) +#define SCLP_HAS_CPU_INFO (sclp_facilities & 0x0800000000000000ULL) +#define SCLP_HAS_CPU_RECONFIG (sclp_facilities & 0x0400000000000000ULL) struct gds_subvector { u8 length; |