Intel: perf/x86: Use update attribute groups for extra format

mainline inclusion
from mainline-v5.3-rc1
commit 3ea40ac7
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I47H3V
CVE: NA

--------------------------------

commit 3ea40ac7 upstream
Backport summary: backport to kernel 4.19.57 for ICX perf topdown support

Using the new pmu::update_attrs attribute group for
extra "format" directory.
Signed-off-by: NJiri Olsa <jolsa@kernel.org>
Signed-off-by: NPeter 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/20190512155518.21468-8-jolsa@kernel.orgSigned-off-by: NIngo Molnar <mingo@kernel.org>
Signed-off-by: NYunying Sun <yunying.sun@intel.com>
Signed-off-by: NJackie Liu <liuyun01@kylinos.cn>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
Reviewed-by: NWei Li <liwei391@huawei.com>
Reviewed-by: NXie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>

arch/x86/events/intel/core.c

@@ -4188,6 +4188,12 @@ lbr_is_visible(struct kobject *kobj, struct attribute *attr, int i)
 	return x86_pmu.lbr_nr ? attr->mode : 0;
 }
 
+static umode_t
+exra_is_visible(struct kobject *kobj, struct attribute *attr, int i)
+{
+	return x86_pmu.version >= 2 ? attr->mode : 0;
+}
+
 static struct attribute_group group_events_td  = {
 	.name = "events",
 };
@@ -4213,12 +4219,18 @@ static struct attribute_group group_caps_lbr = {
 	.is_visible = lbr_is_visible,
 };
 
+static struct attribute_group group_format_extra = {
+	.name       = "format",
+	.is_visible = exra_is_visible,
+};
+
 static const struct attribute_group *attr_update[] = {
 	&group_events_td,
 	&group_events_mem,
 	&group_events_tsx,
 	&group_caps_gen,
 	&group_caps_lbr,
+	&group_format_extra,
 	NULL,
 };
 
@@ -4782,15 +4794,10 @@ __init int intel_pmu_init(void)
 
 	snprintf(pmu_name_str, sizeof pmu_name_str, "%s", name);
 
-	if (version >= 2 && extra_attr) {
-		x86_pmu.format_attrs = merge_attr(intel_arch3_formats_attr,
-						  extra_attr);
-		WARN_ON(!x86_pmu.format_attrs);
-	}
-
 	group_events_td.attrs  = td_attr;
 	group_events_mem.attrs = mem_attr;
 	group_events_tsx.attrs = tsx_attr;
+	group_format_extra.attrs = extra_attr;
 
 	x86_pmu.attr_update = attr_update;