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Commit 570126d3 authored by Michael Mueller's avatar Michael Mueller Committed by Christian Borntraeger
Browse files

s390/sclp: add sclp_get_ibc function 



The patch adds functionality to retrieve the IBC configuration
by means of function sclp_get_ibc().

Signed-off-by: default avatarMichael Mueller <mimu@linux.vnet.ibm.com>
Acked-by: default avatarCornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Acked-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
parent 4953919f

arch/s390/include/asm/sclp.h

+1 −0
Original line number Diff line number Diff line
@@ -66,5 +66,6 @@ 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);

unsigned int sclp_get_ibc(void);



#endif /* _ASM_S390_SCLP_H */

drivers/s390/char/sclp_early.c

+11 −1
Original line number Diff line number Diff line
@@ -27,7 +27,9 @@ struct read_info_sccb { 
	u8	loadparm[8];		/* 24-31 */

	u8	_reserved1[48 - 32];	/* 32-47 */

	u64	facilities;		/* 48-55 */

	u8	_reserved2[84 - 56];	/* 56-83 */

	u8	_reserved2a[76 - 56];	/* 56-75 */

	u32	ibc;			/* 76-79 */

	u8	_reserved2b[84 - 80];	/* 80-83 */

	u8	fac84;			/* 84 */

	u8	fac85;			/* 85 */

	u8	_reserved3[91 - 86];	/* 86-90 */
@@ -47,6 +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 u32 sclp_ibc;



u64 sclp_facilities;

u8 sclp_fac84;
@@ -111,6 +114,7 @@ static void __init sclp_facilities_detect(struct read_info_sccb *sccb) 
	sclp_rnmax = sccb->rnmax ? sccb->rnmax : sccb->rnmax2;

	sclp_rzm = sccb->rnsize ? sccb->rnsize : sccb->rnsize2;

	sclp_rzm <<= 20;

	sclp_ibc = sccb->ibc;



	if (!sccb->hcpua) {

		if (MACHINE_IS_VM)
@@ -168,6 +172,12 @@ int sclp_has_siif(void) 
}

EXPORT_SYMBOL(sclp_has_siif);



unsigned int sclp_get_ibc(void)

{

	return sclp_ibc;

}

EXPORT_SYMBOL(sclp_get_ibc);



/*

 * This function will be called after sclp_facilities_detect(), which gets

 * called from early.c code. The sclp_facilities_detect() function retrieves