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s390/sclp: introduce check for the SIGP Interpretation Facility

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This patch introduces the infrastructure to check whether the SIGP
Interpretation Facility is installed on all VCPUs in the configuration.

Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
David Hildenbrand 2014-10-14 12:11:02 +02:00 committed by Christian Borntraeger
parent a3a9c59a68
commit d614be05c8
2 changed files with 11 additions and 1 deletions
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4
arch/s390/include/asm/sclp.h
View File

@ -31,7 +31,8 @@ struct sclp_cpu_entry {
u8 reserved0[2];
u8 : 3;
u8 siif : 1;
u8 : 4;
u8 sigpif : 1;
u8 : 3;
u8 reserved2[10];
u8 type;
u8 reserved1;
@ -66,6 +67,7 @@ int memcpy_hsa(void *dest, unsigned long src, size_t count, int mode);
unsigned long sclp_get_hsa_size(void);
void sclp_early_detect(void);
int sclp_has_siif(void);
int sclp_has_sigpif(void);
unsigned int sclp_get_ibc(void);
#endif /* _ASM_S390_SCLP_H */

8
drivers/s390/char/sclp_early.c
View File

@ -49,6 +49,7 @@ static unsigned long sclp_hsa_size;
static unsigned int sclp_max_cpu;
static struct sclp_ipl_info sclp_ipl_info;
static unsigned char sclp_siif;
static unsigned char sclp_sigpif;
static u32 sclp_ibc;
u64 sclp_facilities;
@ -131,6 +132,7 @@ static void __init sclp_facilities_detect(struct read_info_sccb *sccb)
if (boot_cpu_address != cpue->address)
continue;
sclp_siif = cpue->siif;
sclp_sigpif = cpue->sigpif;
break;
}
@ -172,6 +174,12 @@ int sclp_has_siif(void)
}
EXPORT_SYMBOL(sclp_has_siif);
int sclp_has_sigpif(void)
{
return sclp_sigpif;
}
EXPORT_SYMBOL(sclp_has_sigpif);
unsigned int sclp_get_ibc(void)
{
return sclp_ibc;