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authorHeiko Carstens <heiko.carstens@de.ibm.com>2016-12-03 09:48:01 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2016-12-07 07:23:07 +0100
commitaf51160ebd3cc1c8bf0d37a48f13ac0dbe8a6e5f (patch)
tree40771af138b90c55d7baa36c5257fbe16ddd5572 /arch/s390/include
parentebb299a51059017ec253bd30781a83d1f6e11b24 (diff)
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 'arch/s390/include')
-rw-r--r--arch/s390/include/asm/sclp.h10
-rw-r--r--arch/s390/include/asm/smp.h2
2 files changed, 11 insertions, 1 deletions
diff --git a/arch/s390/include/asm/sclp.h b/arch/s390/include/asm/sclp.h
index 2ad9c204b1a2..8db92a5b3bf1 100644
--- a/arch/s390/include/asm/sclp.h
+++ b/arch/s390/include/asm/sclp.h
@@ -101,7 +101,8 @@ struct zpci_report_error_header {
u8 data[0]; /* Subsequent Data passed verbatim to SCLP ET 24 */
} __packed;
-int sclp_get_core_info(struct sclp_core_info *info);
+int _sclp_get_core_info_early(struct sclp_core_info *info);
+int _sclp_get_core_info(struct sclp_core_info *info);
int sclp_core_configure(u8 core);
int sclp_core_deconfigure(u8 core);
int sclp_sdias_blk_count(void);
@@ -119,4 +120,11 @@ void sclp_early_detect(void);
void _sclp_print_early(const char *);
void sclp_ocf_cpc_name_copy(char *dst);
+static inline int sclp_get_core_info(struct sclp_core_info *info, int early)
+{
+ if (early)
+ return _sclp_get_core_info_early(info);
+ return _sclp_get_core_info(info);
+}
+
#endif /* _ASM_S390_SCLP_H */
diff --git a/arch/s390/include/asm/smp.h b/arch/s390/include/asm/smp.h
index 8116b7b63af3..3deb134587b7 100644
--- a/arch/s390/include/asm/smp.h
+++ b/arch/s390/include/asm/smp.h
@@ -36,6 +36,7 @@ extern void smp_yield_cpu(int cpu);
extern void smp_cpu_set_polarization(int cpu, int val);
extern int smp_cpu_get_polarization(int cpu);
extern void smp_fill_possible_mask(void);
+extern void smp_detect_cpus(void);
#else /* CONFIG_SMP */
@@ -56,6 +57,7 @@ static inline int smp_store_status(int cpu) { return 0; }
static inline int smp_vcpu_scheduled(int cpu) { return 1; }
static inline void smp_yield_cpu(int cpu) { }
static inline void smp_fill_possible_mask(void) { }
+static inline void smp_detect_cpus(void) { }
#endif /* CONFIG_SMP */