powerpc/perf/{hv-gpci, hv-common}: generate requests with counters annotated

This adds (in req-gen/) a framework for defining gpci counter requests.
It uses macro magic similar to ftrace.

Also convert the existing hv-gpci request structures and enum values to
use the new framework (and adjust old users of the structs and enum
values to cope with changes in naming).

In exchange for this macro disaster, we get autogenerated event listing
for GPCI in sysfs, build time field offset checking, and zero
duplication of information about GPCI requests.

Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com>
Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

1 files changed, 23 insertions, 0 deletions

diff --git a/arch/powerpc/perf/hv-gpci.c b/arch/powerpc/perf/hv-gpci.c
index a051fe946c63..856fe6e03c2a 100644
--- a/arch/powerpc/perf/hv-gpci.c
+++ b/arch/powerpc/perf/hv-gpci.c
@@ -31,7 +31,18 @@
 /* u32 */
 EVENT_DEFINE_RANGE_FORMAT(request, config, 0, 31);
 /* u32 */
+/*
+ * Note that starting_index, phys_processor_idx, sibling_part_id,
+ * hw_chip_id, partition_id all refer to the same bit range. They
+ * are basically aliases for the starting_index. The specific alias
+ * used depends on the event. See REQUEST_IDX_KIND in hv-gpci-requests.h
+ */
 EVENT_DEFINE_RANGE_FORMAT(starting_index, config, 32, 63);
+EVENT_DEFINE_RANGE_FORMAT_LITE(phys_processor_idx, config, 32, 63);
+EVENT_DEFINE_RANGE_FORMAT_LITE(sibling_part_id, config, 32, 63);
+EVENT_DEFINE_RANGE_FORMAT_LITE(hw_chip_id, config, 32, 63);
+EVENT_DEFINE_RANGE_FORMAT_LITE(partition_id, config, 32, 63);
+
 /* u16 */
 EVENT_DEFINE_RANGE_FORMAT(secondary_index, config1, 0, 15);
 /* u8 */
@@ -44,6 +55,10 @@ EVENT_DEFINE_RANGE_FORMAT(offset, config1, 32, 63);
 static struct attribute *format_attrs[] = {
 	&format_attr_request.attr,
 	&format_attr_starting_index.attr,
+	&format_attr_phys_processor_idx.attr,
+	&format_attr_sibling_part_id.attr,
+	&format_attr_hw_chip_id.attr,
+	&format_attr_partition_id.attr,
 	&format_attr_secondary_index.attr,
 	&format_attr_counter_info_version.attr,
 
@@ -57,6 +72,11 @@ static struct attribute_group format_group = {
 	.attrs = format_attrs,
 };
 
+static struct attribute_group event_group = {
+	.name  = "events",
+	.attrs = hv_gpci_event_attrs,
+};
+
 #define HV_CAPS_ATTR(_name, _format)				\
 static ssize_t _name##_show(struct device *dev,			\
 			    struct device_attribute *attr,	\
@@ -102,6 +122,7 @@ static struct attribute_group interface_group = {
 
 static const struct attribute_group *attr_groups[] = {
 	&format_group,
+	&event_group,
 	&interface_group,
 	NULL,
 };
@@ -265,6 +286,8 @@ static int hv_gpci_init(void)
 	unsigned long hret;
 	struct hv_perf_caps caps;
 
+	hv_gpci_assert_offsets_correct();
+
 	if (!firmware_has_feature(FW_FEATURE_LPAR)) {
 		pr_debug("not a virtualized system, not enabling\n");
 		return -ENODEV;