1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/export.h>
3 #include <linux/types.h>
4 #include <linux/bits.h>
8 not_visible(struct kobject *kobj, struct attribute *attr, int i)
14 perf_msr_probe(struct perf_msr *msr, int cnt, bool zero, void *data)
16 unsigned long avail = 0;
20 if (cnt >= BITS_PER_LONG)
23 for (bit = 0; bit < cnt; bit++) {
24 if (!msr[bit].no_check) {
25 struct attribute_group *grp = msr[bit].grp;
27 grp->is_visible = not_visible;
29 if (msr[bit].test && !msr[bit].test(bit, data))
31 /* Virt sucks; you cannot tell if a R/O MSR is present :/ */
32 if (rdmsrl_safe(msr[bit].msr, &val))
34 /* Disable zero counters if requested. */
38 grp->is_visible = NULL;
45 EXPORT_SYMBOL_GPL(perf_msr_probe);