s390/sclp: detect intervention bypass facility

Let's detect if we have the intervention bypass facility installed.

Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>

diff --git a/arch/s390/include/asm/sclp.h b/arch/s390/include/asm/sclp.h
index e1450dd..ef1f427 100644 (file)
--- a/arch/s390/include/asm/sclp.h
+++ b/arch/s390/include/asm/sclp.h
@@ -38,7 +38,11 @@ struct sclp_core_entry {
        u8 siif : 1;
        u8 sigpif : 1;
        u8 : 3;
-       u8 reserved2[10];
+       u8 reserved2[3];
+       u8 : 2;
+       u8 ib : 1;
+       u8 : 5;
+       u8 reserved3[6];
        u8 type;
        u8 reserved1;
 } __attribute__((packed));
@@ -64,6 +68,7 @@ struct sclp_info {
        unsigned char has_gpere : 1;
        unsigned char has_cmma : 1;
        unsigned char has_gsls : 1;
+       unsigned char has_ib : 1;
        unsigned int ibc;
        unsigned int mtid;
        unsigned int mtid_cp;

diff --git a/drivers/s390/char/sclp_early.c b/drivers/s390/char/sclp_early.c
index 99fce6b..2240b61 100644 (file)
--- a/drivers/s390/char/sclp_early.c
+++ b/drivers/s390/char/sclp_early.c
@@ -149,6 +149,7 @@ static void __init sclp_facilities_detect(struct read_info_sccb *sccb)
                sclp.has_sigpif = cpue->sigpif;
                sclp.has_sief2 = cpue->sief2;
                sclp.has_gpere = cpue->gpere;
+               sclp.has_ib = cpue->ib;
                break;
        }