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| author |   Philipp Rudo <prudo@linux.ibm.com> | 2019-04-08 14:24:08 +0200 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2019-04-29 10:44:04 +0200 |
| commit | c9896acc7851109d4e84c1e3a54cb1b9794dea6b (patch) | |
| tree | e258e2c33f0f5def2a7ae88f991a175235406fa1 /drivers/s390/char | |
| parent | s390/kexec_file: Disable kexec_load when IPLed secure (diff) | |
| download | linux-dev-c9896acc7851109d4e84c1e3a54cb1b9794dea6b.tar.xz linux-dev-c9896acc7851109d4e84c1e3a54cb1b9794dea6b.zip | |
s390/ipl: Provide has_secure sysfs attribute
Provide an interface for userspace so it can find out if a machine is
capeable of doing secure boot. The interface is, for example, needed for
zipl so it can find out which file format it can/should write to disk.
Signed-off-by: Philipp Rudo <prudo@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/char')
| -rw-r--r-- | drivers/s390/char/sclp.h | 4 | ||||
| -rw-r--r-- | drivers/s390/char/sclp_early.c | 2 |
2 files changed, 5 insertions, 1 deletions
diff --git a/drivers/s390/char/sclp.h b/drivers/s390/char/sclp.h index 367e9d384d85..287382dc21c5 100644 --- a/drivers/s390/char/sclp.h +++ b/drivers/s390/char/sclp.h @@ -197,7 +197,9 @@ struct read_info_sccb { u32 hmfai; /* 124-127 */ u8 _pad_128[134 - 128]; /* 128-133 */ u8 byte_134; /* 134 */ - u8 _pad_135[4096 - 135]; /* 135-4095 */ + u8 _pad_135; /* 135 */ + u16 cbl; /* 136-137 */ + u8 _pad_138[4096 - 138]; /* 138-4095 */ } __packed __aligned(PAGE_SIZE); struct read_storage_sccb { diff --git a/drivers/s390/char/sclp_early.c b/drivers/s390/char/sclp_early.c index 8332788681c4..dae9de3d7c96 100644 --- a/drivers/s390/char/sclp_early.c +++ b/drivers/s390/char/sclp_early.c @@ -40,6 +40,8 @@ static void __init sclp_early_facilities_detect(struct read_info_sccb *sccb) sclp.has_gisaf = !!(sccb->fac118 & 0x08); 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) |