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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2016-12-03 11:48:01 +0300 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-12-07 09:23:07 +0300 |
| commit | af51160ebd3cc1c8bf0d37a48f13ac0dbe8a6e5f (patch) | |
| tree | 40771af138b90c55d7baa36c5257fbe16ddd5572 /drivers/s390/char/sclp_cmd.c | |
| parent | ebb299a51059017ec253bd30781a83d1f6e11b24 (diff) | |
| download | linux-af51160ebd3cc1c8bf0d37a48f13ac0dbe8a6e5f.tar.xz | |
s390/smp: initialize cpu_present_mask in setup_arch
In order to be able to setup the cpu to node mappings early it is a
prerequisite to know which cpus are present. Therefore cpus must be
detected much earlier than before.
For sclp based cpu detection this requires yet another early sclp
call, since the system is not ready to use the regular interrupt and
memory allocations.
Reviewed-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
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_cmd.c')
| -rw-r--r-- | drivers/s390/char/sclp_cmd.c | 25 |
1 files changed, 1 insertions, 24 deletions
diff --git a/drivers/s390/char/sclp_cmd.c b/drivers/s390/char/sclp_cmd.c index e3fc7539116b..b9c5522b8a68 100644 --- a/drivers/s390/char/sclp_cmd.c +++ b/drivers/s390/char/sclp_cmd.c @@ -80,33 +80,10 @@ out: * CPU configuration related functions. */ -#define SCLP_CMDW_READ_CPU_INFO 0x00010001 #define SCLP_CMDW_CONFIGURE_CPU 0x00110001 #define SCLP_CMDW_DECONFIGURE_CPU 0x00100001 -struct read_cpu_info_sccb { - struct sccb_header header; - u16 nr_configured; - u16 offset_configured; - u16 nr_standby; - u16 offset_standby; - u8 reserved[4096 - 16]; -} __attribute__((packed, aligned(PAGE_SIZE))); - -static void sclp_fill_core_info(struct sclp_core_info *info, - struct read_cpu_info_sccb *sccb) -{ - char *page = (char *) sccb; - - memset(info, 0, sizeof(*info)); - info->configured = sccb->nr_configured; - info->standby = sccb->nr_standby; - info->combined = sccb->nr_configured + sccb->nr_standby; - memcpy(&info->core, page + sccb->offset_configured, - info->combined * sizeof(struct sclp_core_entry)); -} - -int sclp_get_core_info(struct sclp_core_info *info) +int _sclp_get_core_info(struct sclp_core_info *info) { int rc; struct read_cpu_info_sccb *sccb; |