s390/sclp: Detect ASTFLEIE 2 facility

Detect alternate STFLE interpretive execution facility 2.

Signed-off-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com>
Signed-off-by: Christoph Schlameuss <schlameuss@linux.ibm.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Hendrik Brueckner <brueckner@linux.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Message-ID: <20260612-vsie-alter-stfle-fac-v4-2-74f0e1559929@linux.ibm.com>

diff --git a/arch/s390/include/asm/sclp.h b/arch/s390/include/asm/sclp.h
index 0f184dbdbe5e0748fcecbca38b9e55a56968dc79..0f21501d3e866338895caeed385aa4f586384d69 100644 (file)
--- a/arch/s390/include/asm/sclp.h
+++ b/arch/s390/include/asm/sclp.h
@@ -104,6 +104,7 @@ struct sclp_info {
        unsigned char has_aisii : 1;
        unsigned char has_aeni : 1;
        unsigned char has_aisi : 1;
+       unsigned char has_astfleie2 : 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 6bf501ad8ff0ea6d3df0a721f29fd24506409493..22dd797e62291fef087d46ac1c7f805486e3935b 100644 (file)
--- a/drivers/s390/char/sclp_early.c
+++ b/drivers/s390/char/sclp_early.c
@@ -61,8 +61,10 @@ static void __init sclp_early_facilities_detect(void)
                sclp.has_sipl = !!(sccb->cbl & 0x4000);
                sclp.has_sipl_eckd = !!(sccb->cbl & 0x2000);
        }
-       if (sccb->cpuoff > 139)
+       if (sccb->cpuoff > 139) {
                sclp.has_diag324 = !!(sccb->byte_139 & 0x80);
+               sclp.has_astfleie2 = !!(sccb->byte_139 & 0x40);
+       }
        sclp.rnmax = sccb->rnmax ? sccb->rnmax : sccb->rnmax2;
        sclp.rzm = sccb->rnsize ? sccb->rnsize : sccb->rnsize2;
        sclp.rzm <<= 20;