From: Jiri Olsa <jolsa@kernel.org> mainline inclusion from mainline-v5.3-rc1 commit 3d5672735b2348f5b13679a27f90c0847d22125d category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I47H3V CVE: NA -------------------------------- commit 3d5672735b2348f5b13679a27f90c0847d22125d upstream Backport summary: backport to kernel 4.19.57 for ICX perf topdown support We dont need to pre-filter out unsupported base events, we can just use its group's is_visible function to do this. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: https://lkml.kernel.org/r/20190512155518.21468-6-jolsa@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Yunying Sun <yunying.sun@intel.com> Signed-off-by: Jackie Liu <liuyun01@kylinos.cn> Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com> Reviewed-by: Wei Li <liwei391@huawei.com> Reviewed-by: Xie XiuQi <xiexiuqi@huawei.com> Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> --- arch/x86/events/core.c | 53 ++++++++++++------------------------------ 1 file changed, 15 insertions(+), 38 deletions(-) diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c index d56c9b087b1a0..b64cb3b373b5f 100644 --- a/arch/x86/events/core.c +++ b/arch/x86/events/core.c @@ -1587,42 +1587,6 @@ static struct attribute_group x86_pmu_format_group = { .attrs = NULL, }; -/* - * Remove all undefined events (x86_pmu.event_map(id) == 0) - * out of events_attr attributes. - */ -static void __init filter_events(struct attribute **attrs) -{ - struct device_attribute *d; - struct perf_pmu_events_attr *pmu_attr; - int offset = 0; - int i, j; - - for (i = 0; attrs[i]; i++) { - d = (struct device_attribute *)attrs[i]; - pmu_attr = container_of(d, struct perf_pmu_events_attr, attr); - /* str trumps id */ - if (pmu_attr->event_str) - continue; - if (x86_pmu.event_map(i + offset)) - continue; - - for (j = i; attrs[j]; j++) - attrs[j] = attrs[j + 1]; - - /* Check the shifted attr. */ - i--; - - /* - * event_map() is index based, the attrs array is organized - * by increasing event index. If we shift the events, then - * we need to compensate for the event_map(), otherwise - * we are looking up the wrong event in the map - */ - offset++; - } -} - /* Merge two pointer arrays */ __init struct attribute **merge_attr(struct attribute **a, struct attribute **b) { @@ -1713,9 +1677,24 @@ static struct attribute *events_attr[] = { NULL, }; +/* + * Remove all undefined events (x86_pmu.event_map(id) == 0) + * out of events_attr attributes. + */ +static umode_t +is_visible(struct kobject *kobj, struct attribute *attr, int idx) +{ + struct perf_pmu_events_attr *pmu_attr; + + pmu_attr = container_of(attr, struct perf_pmu_events_attr, attr.attr); + /* str trumps id */ + return pmu_attr->event_str || x86_pmu.event_map(idx) ? attr->mode : 0; +} + static struct attribute_group x86_pmu_events_group = { .name = "events", .attrs = events_attr, + .is_visible = is_visible, }; ssize_t x86_event_sysfs_show(char *page, u64 config, u64 event) @@ -1825,8 +1804,6 @@ static int __init init_hw_perf_events(void) if (!x86_pmu.events_sysfs_show) x86_pmu_events_group.attrs = &empty_attrs; - else - filter_events(x86_pmu_events_group.attrs); if (x86_pmu.attrs) { struct attribute **tmp; -- 2.25.1