diff options
| author | Tony Luck <tony.luck@intel.com> | 2022-04-06 15:01:50 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-20 18:56:39 +0200 |
| commit | aa63a74d4535a1d97b60e46655a1361c42565b89 (patch) | |
| tree | 25f6eaeaf8e1493a5cf06969bfa3a4e249f54083 /drivers/base | |
| parent | ce522ba9ef7e2d9fb22a39eb3371c0c64e2a433e (diff) | |
topology/sysfs: Hide PPIN on systems that do not support it.
Systems that do not support a Protected Processor Identification Number
currently report:
# cat /sys/devices/system/cpu/cpu0/topology/ppin
0x0
which is confusing/wrong.
Add a ".is_visible" function to suppress inclusion of the ppin file.
Fixes: ab28e944197f ("topology/sysfs: Add PPIN in sysfs under cpu topology")
Signed-off-by: Tony Luck <tony.luck@intel.com>
Link: https://lore.kernel.org/r/20220406220150.63855-1-tony.luck@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/topology.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/base/topology.c b/drivers/base/topology.c index e9d1efcda89b..706dbf8bf249 100644 --- a/drivers/base/topology.c +++ b/drivers/base/topology.c @@ -152,9 +152,21 @@ static struct attribute *default_attrs[] = { NULL }; +static umode_t topology_is_visible(struct kobject *kobj, + struct attribute *attr, int unused) +{ + struct device *dev = kobj_to_dev(kobj); + + if (attr == &dev_attr_ppin.attr && !topology_ppin(dev->id)) + return 0; + + return attr->mode; +} + static const struct attribute_group topology_attr_group = { .attrs = default_attrs, .bin_attrs = bin_attrs, + .is_visible = topology_is_visible, .name = "topology" }; |