perf/x86/intel/uncore: Generalize I/O stacks to PMON mapping procedure

Currently I/O stacks to IIO PMON mapping is available on Skylake servers
only and need to make code more general to easily enable further platforms.
So, introduce get_topology() callback in struct intel_uncore_type which
allows to move common code to separate function and make mapping procedure
more general.

Signed-off-by: Alexander Antonov <alexander.antonov@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Link: https://lkml.kernel.org/r/20210426131614.16205-2-alexander.antonov@linux.intel.com

diff --git a/arch/x86/events/intel/uncore.h b/arch/x86/events/intel/uncore.h
index 2917910..187d728 100644 (file)
--- a/arch/x86/events/intel/uncore.h
+++ b/arch/x86/events/intel/uncore.h
@@ -92,6 +92,7 @@ struct intel_uncore_type {
        /*
         * Optional callbacks for managing mapping of Uncore units to PMONs
         */
+       int (*get_topology)(struct intel_uncore_type *type);
        int (*set_mapping)(struct intel_uncore_type *type);
        void (*cleanup_mapping)(struct intel_uncore_type *type);
 };

diff --git a/arch/x86/events/intel/uncore_snbep.c b/arch/x86/events/intel/uncore_snbep.c
index 63f0972..02e36a3 100644 (file)
--- a/arch/x86/events/intel/uncore_snbep.c
+++ b/arch/x86/events/intel/uncore_snbep.c
@@ -3680,12 +3680,19 @@ static inline u8 skx_iio_stack(struct intel_uncore_pmu *pmu, int die)
 }
 
 static umode_t
-skx_iio_mapping_visible(struct kobject *kobj, struct attribute *attr, int die)
+pmu_iio_mapping_visible(struct kobject *kobj, struct attribute *attr,
+                        int die, int zero_bus_pmu)
 {
        struct intel_uncore_pmu *pmu = dev_to_uncore_pmu(kobj_to_dev(kobj));
 
-       /* Root bus 0x00 is valid only for die 0 AND pmu_idx = 0. */
-       return (!skx_iio_stack(pmu, die) && pmu->pmu_idx) ? 0 : attr->mode;
+       return (!skx_iio_stack(pmu, die) && pmu->pmu_idx != zero_bus_pmu) ? 0 : attr->mode;
+}
+
+static umode_t
+skx_iio_mapping_visible(struct kobject *kobj, struct attribute *attr, int die)
+{
+       /* Root bus 0x00 is valid only for pmu_idx = 0. */
+       return pmu_iio_mapping_visible(kobj, attr, die, 0);
 }
 
 static ssize_t skx_iio_mapping_show(struct device *dev,
@@ -3770,7 +3777,8 @@ static const struct attribute_group *skx_iio_attr_update[] = {
        NULL,
 };
 
-static int skx_iio_set_mapping(struct intel_uncore_type *type)
+static int
+pmu_iio_set_mapping(struct intel_uncore_type *type, struct attribute_group *ag)
 {
        char buf[64];
        int ret;
@@ -3778,7 +3786,7 @@ static int skx_iio_set_mapping(struct intel_uncore_type *type)
        struct attribute **attrs = NULL;
        struct dev_ext_attribute *eas = NULL;
 
-       ret = skx_iio_get_topology(type);
+       ret = type->get_topology(type);
        if (ret < 0)
                goto clear_attr_update;
 
@@ -3805,7 +3813,7 @@ static int skx_iio_set_mapping(struct intel_uncore_type *type)
                eas[die].var = (void *)die;
                attrs[die] = &eas[die].attr.attr;
        }
-       skx_iio_mapping_group.attrs = attrs;
+       ag->attrs = attrs;
 
        return 0;
 err:
@@ -3819,6 +3827,11 @@ clear_attr_update:
        return ret;
 }
 
+static int skx_iio_set_mapping(struct intel_uncore_type *type)
+{
+       return pmu_iio_set_mapping(type, &skx_iio_mapping_group);
+}
+
 static void skx_iio_cleanup_mapping(struct intel_uncore_type *type)
 {
        struct attribute **attr = skx_iio_mapping_group.attrs;
@@ -3849,6 +3862,7 @@ static struct intel_uncore_type skx_uncore_iio = {
        .ops                    = &skx_uncore_iio_ops,
        .format_group           = &skx_uncore_iio_format_group,
        .attr_update            = skx_iio_attr_update,
+       .get_topology           = skx_iio_get_topology,
        .set_mapping            = skx_iio_set_mapping,
        .cleanup_mapping        = skx_iio_cleanup_mapping,
 };