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: Michael Mueller <mimu@linux.vnet.ibm.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
diff --git a/arch/s390/include/asm/sclp.h b/arch/s390/include/asm/sclp.h
index 943d434..1aba89b 100644
--- a/arch/s390/include/asm/sclp.h
+++ b/arch/s390/include/asm/sclp.h
@@ -66,5 +66,6 @@
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 */
diff --git a/drivers/s390/char/sclp_early.c b/drivers/s390/char/sclp_early.c
index b57fe0e..1918d9d 100644
--- a/drivers/s390/char/sclp_early.c
+++ b/drivers/s390/char/sclp_early.c
@@ -27,7 +27,9 @@
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 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 @@
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 @@
}
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