s390/ipl: Fix detection of has_secure attribute

Use the correct bit for detection of the machine capability associated
with the has_secure attribute. It is expected that the underlying
platform (including hypervisors) unsets the bit when they don't provide
secure ipl for their guests.

Fixes: c9896acc7851 ("s390/ipl: Provide has_secure sysfs attribute")
Cc: stable@vger.kernel.org # 5.2
Signed-off-by: Philipp Rudo <prudo@linux.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

diff --git a/arch/s390/include/asm/sclp.h b/arch/s390/include/asm/sclp.h
index f577c5f..c563f83 100644 (file)
--- a/arch/s390/include/asm/sclp.h
+++ b/arch/s390/include/asm/sclp.h
@@ -80,7 +80,6 @@ struct sclp_info {
        unsigned char has_gisaf : 1;
        unsigned char has_diag318 : 1;
        unsigned char has_sipl : 1;
-       unsigned char has_sipl_g2 : 1;
        unsigned char has_dirq : 1;
        unsigned int ibc;
        unsigned int mtid;

diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index d836af3..2c0a515 100644 (file)
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -286,12 +286,7 @@ static struct kobj_attribute sys_ipl_secure_attr =
 static ssize_t ipl_has_secure_show(struct kobject *kobj,
                                   struct kobj_attribute *attr, char *page)
 {
-       if (MACHINE_IS_LPAR)
-               return sprintf(page, "%i\n", !!sclp.has_sipl);
-       else if (MACHINE_IS_VM)
-               return sprintf(page, "%i\n", !!sclp.has_sipl_g2);
-       else
-               return sprintf(page, "%i\n", 0);
+       return sprintf(page, "%i\n", !!sclp.has_sipl);
 }
 
 static struct kobj_attribute sys_ipl_has_secure_attr =

diff --git a/drivers/s390/char/sclp_early.c b/drivers/s390/char/sclp_early.c
index 6c90aa7..e71992a 100644 (file)
--- a/drivers/s390/char/sclp_early.c
+++ b/drivers/s390/char/sclp_early.c
@@ -41,7 +41,6 @@ static void __init sclp_early_facilities_detect(struct read_info_sccb *sccb)
        sclp.has_hvs = !!(sccb->fac119 & 0x80);
        sclp.has_kss = !!(sccb->fac98 & 0x01);
        sclp.has_sipl = !!(sccb->cbl & 0x02);
-       sclp.has_sipl_g2 = !!(sccb->cbl & 0x04);
        if (sccb->fac85 & 0x02)
                S390_lowcore.machine_flags |= MACHINE_FLAG_ESOP;
        if (sccb->fac91 & 0x40)