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Commit d614be05 authored by David Hildenbrand's avatar David Hildenbrand Committed by Christian Borntraeger
Browse files

s390/sclp: introduce check for the SIGP Interpretation Facility 



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

Signed-off-by: default avatarDavid Hildenbrand <dahi@linux.vnet.ibm.com>
Acked-by: default avatarCornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
parent a3a9c59a

arch/s390/include/asm/sclp.h

+3 −1
Original line number Diff line number Diff line
@@ -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 */

drivers/s390/char/sclp_early.c

+8 −0
Original line number Diff line number Diff line
@@ -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;