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| author | Harald Freudenberger <freude@linux.ibm.com> | 2022-09-20 15:18:39 +0200 |
|---|---|---|
| committer | Heiko Carstens <hca@linux.ibm.com> | 2023-03-20 11:12:48 +0100 |
| commit | d7b1813af6a589597290cd5f720e138c0a2bf913 (patch) | |
| tree | ec5436621a7836daa01c61314862a600f768d8a7 /drivers/s390 | |
| parent | f6047040217babeb9655b855c83d61cb1c375ac9 (diff) | |
| download | linux-d7b1813af6a589597290cd5f720e138c0a2bf913.tar.gz linux-d7b1813af6a589597290cd5f720e138c0a2bf913.tar.bz2 linux-d7b1813af6a589597290cd5f720e138c0a2bf913.zip | |
s390/ap: introduce new AP bus sysfs attribute features
Introduce a new AP bus sysfs attribute /sys/bus/ap/features
which shows the features from the QCI information.
Currently these feature bits are evaluated:
- QCI S bit is shown as 'APSC'
- QCI N bit is shown as 'APXA'
- QCI C bit is shown as 'QACT'
- QCI R bit is shown as 'RC8A'
- QCI B bit is shown as 'APSB'
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Tony Krowiak <akrowiak@linux.ibm.com>
Reviewed-by: Holger Dengler <dengler@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/crypto/ap_bus.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c index b3c350e9fc1d..4e1926cf7a3d 100644 --- a/drivers/s390/crypto/ap_bus.c +++ b/drivers/s390/crypto/ap_bus.c @@ -1557,6 +1557,31 @@ static ssize_t bindings_show(struct bus_type *bus, char *buf) static BUS_ATTR_RO(bindings); +static ssize_t features_show(struct bus_type *bus, char *buf) +{ + int n = 0; + + if (!ap_qci_info) /* QCI not supported */ + return sysfs_emit(buf, "-\n"); + + if (ap_qci_info->apsc) + n += sysfs_emit_at(buf, n, "APSC "); + if (ap_qci_info->apxa) + n += sysfs_emit_at(buf, n, "APXA "); + if (ap_qci_info->qact) + n += sysfs_emit_at(buf, n, "QACT "); + if (ap_qci_info->rc8a) + n += sysfs_emit_at(buf, n, "RC8A "); + if (ap_qci_info->apsb) + n += sysfs_emit_at(buf, n, "APSB "); + + sysfs_emit_at(buf, n == 0 ? 0 : n - 1, "\n"); + + return n; +} + +static BUS_ATTR_RO(features); + static struct attribute *ap_bus_attrs[] = { &bus_attr_ap_domain.attr, &bus_attr_ap_control_domain_mask.attr, @@ -1572,6 +1597,7 @@ static struct attribute *ap_bus_attrs[] = { &bus_attr_aqmask.attr, &bus_attr_scans.attr, &bus_attr_bindings.attr, + &bus_attr_features.attr, NULL, }; ATTRIBUTE_GROUPS(ap_bus); |