1 // SPDX-License-Identifier: GPL-2.0-or-later
10 #define pr_fmt(fmt) "hv-gpci: " fmt
16 #include <asm/io.h>
18 #include "hv-gpci.h"
19 #include "hv-common.h"
23  *  perf stat -e 'hv_gpci/counter_info_version=3,offset=0,length=8,
34  * used depends on the event. See REQUEST_IDX_KIND in hv-gpci-requests.h
46 /* u8, bytes of data (1-8) */
86 		return -EIO;					\
139 	arg->params.counter_request = cpu_to_be32(req);  in systeminfo_gpci_request()
140 	arg->params.starting_index = cpu_to_be32(starting_index);  in systeminfo_gpci_request()
141 	arg->params.secondary_index = cpu_to_be16(secondary_index);  in systeminfo_gpci_request()
157 		return -EPERM;  in systeminfo_gpci_request()
161 	 * because of invalid buffer-length/address or due to some hardware  in systeminfo_gpci_request()
165 		return -EIO;  in systeminfo_gpci_request()
176 	for (i = 0; i < be16_to_cpu(arg->params.returned_values); i++) {  in systeminfo_gpci_request()
177 		j = i * be16_to_cpu(arg->params.cv_element_size);  in systeminfo_gpci_request()
179 		for (; j < (i + 1) * be16_to_cpu(arg->params.cv_element_size); j++)  in systeminfo_gpci_request()
180 			*n += sprintf(buf + *n,  "%02x", (u8)arg->bytes[j]);  in systeminfo_gpci_request()
186 		return -EFBIG;  in systeminfo_gpci_request()
227 		int returned_values = be16_to_cpu(arg->params.returned_values);  in processor_bus_topology_show()
228 		int elementsize = be16_to_cpu(arg->params.cv_element_size);  in processor_bus_topology_show()
229 		int last_element = (returned_values - 1) * elementsize;  in processor_bus_topology_show()
236 		u32 starting_index = arg->bytes[last_element + 3] +  in processor_bus_topology_show()
237 				(arg->bytes[last_element + 2] << 8) +  in processor_bus_topology_show()
238 				(arg->bytes[last_element + 1] << 16) +  in processor_bus_topology_show()
239 				(arg->bytes[last_element] << 24) + 1;  in processor_bus_topology_show()
295 		int returned_values = be16_to_cpu(arg->params.returned_values);  in processor_config_show()
296 		int elementsize = be16_to_cpu(arg->params.cv_element_size);  in processor_config_show()
297 		int last_element = (returned_values - 1) * elementsize;  in processor_config_show()
304 		u32 starting_index = arg->bytes[last_element + 3] +  in processor_config_show()
305 				(arg->bytes[last_element + 2] << 8) +  in processor_config_show()
306 				(arg->bytes[last_element + 1] << 16) +  in processor_config_show()
307 				(arg->bytes[last_element] << 24) + 1;  in processor_config_show()
363 		int returned_values = be16_to_cpu(arg->params.returned_values);  in affinity_domain_via_virtual_processor_show()
364 		int elementsize = be16_to_cpu(arg->params.cv_element_size);  in affinity_domain_via_virtual_processor_show()
365 		int last_element = (returned_values - 1) * elementsize;  in affinity_domain_via_virtual_processor_show()
375 		u32 starting_index = arg->bytes[last_element + 1] + (arg->bytes[last_element] << 8);  in affinity_domain_via_virtual_processor_show()
376 		u16 secondary_index = arg->bytes[last_element + 3] +  in affinity_domain_via_virtual_processor_show()
377 				(arg->bytes[last_element + 2] << 8) + 1;  in affinity_domain_via_virtual_processor_show()
433 		int returned_values = be16_to_cpu(arg->params.returned_values);  in affinity_domain_via_domain_show()
434 		int elementsize = be16_to_cpu(arg->params.cv_element_size);  in affinity_domain_via_domain_show()
435 		int last_element = (returned_values - 1) * elementsize;  in affinity_domain_via_domain_show()
442 		u32 starting_index = arg->bytes[last_element + 1] +  in affinity_domain_via_domain_show()
443 			(arg->bytes[last_element] << 8) + 1;  in affinity_domain_via_domain_show()
477 	 * request is variable-size. For this counter request type,  in affinity_domain_via_partition_result_parse()
487 			*n += sprintf(buf + *n,  "%02x", (u8)arg->bytes[k]);  in affinity_domain_via_partition_result_parse()
490 		total_affinity_domain_ele = (u8)arg->bytes[k - 2] << 8 | (u8)arg->bytes[k - 3];  in affinity_domain_via_partition_result_parse()
491 		size_of_each_affinity_domain_ele = (u8)arg->bytes[k] << 8 | (u8)arg->bytes[k - 1];  in affinity_domain_via_partition_result_parse()
495 				*n += sprintf(buf + *n,  "%02x", (u8)arg->bytes[k]);  in affinity_domain_via_partition_result_parse()
528 	arg->params.counter_request = cpu_to_be32(sysinfo_counter_request[AFFINITY_DOMAIN_VIA_PAR]);  in affinity_domain_via_partition_show()
529 	arg->params.starting_index = cpu_to_be32(0);  in affinity_domain_via_partition_show()
550 			be16_to_cpu(arg->params.returned_values) - 1,  in affinity_domain_via_partition_show()
551 			be16_to_cpu(arg->params.cv_element_size), buf,  in affinity_domain_via_partition_show()
557 			return -EFBIG;  in affinity_domain_via_partition_show()
565 		starting_index = (u8)arg->bytes[last_element] << 8 |  in affinity_domain_via_partition_show()
566 				(u8)arg->bytes[last_element + 1];  in affinity_domain_via_partition_show()
569 		arg->params.counter_request = cpu_to_be32(  in affinity_domain_via_partition_show()
571 		arg->params.starting_index = cpu_to_be32(starting_index);  in affinity_domain_via_partition_show()
582 		be16_to_cpu(arg->params.returned_values),  in affinity_domain_via_partition_show()
583 		be16_to_cpu(arg->params.cv_element_size),  in affinity_domain_via_partition_show()
603 		return -EPERM;  in affinity_domain_via_partition_show()
607 	 * because of invalid buffer-length/address or due to some hardware  in affinity_domain_via_partition_show()
610 	return -EIO;  in affinity_domain_via_partition_show()
691 	arg->params.counter_request = cpu_to_be32(req);  in single_gpci_request()
692 	arg->params.starting_index = cpu_to_be32(starting_index);  in single_gpci_request()
693 	arg->params.secondary_index = cpu_to_be16(secondary_index);  in single_gpci_request()
694 	arg->params.counter_info_version_in = version_in;  in single_gpci_request()
709 	if (ret == H_PARAMETER && be32_to_cpu(arg->params.detail_rc) == 0x1B)  in single_gpci_request()
723 		count |= (u64)(arg->bytes[i]) << ((length - 1 - (i - offset)) * 8);  in single_gpci_request()
750 	prev = local64_xchg(&event->hw.prev_count, now);  in h_gpci_event_update()
751 	local64_add(now - prev, &event->count);  in h_gpci_event_update()
756 	local64_set(&event->hw.prev_count, h_gpci_get_value(event));  in h_gpci_event_start()
779 	if (event->attr.type != event->pmu->type)  in h_gpci_event_init()
780 		return -ENOENT;  in h_gpci_event_init()
783 	if (event->attr.config2) {  in h_gpci_event_init()
785 		return -EINVAL;  in h_gpci_event_init()
790 		return -EOPNOTSUPP;  in h_gpci_event_init()
795 		return -EINVAL;  in h_gpci_event_init()
803 		return -EINVAL;  in h_gpci_event_init()
821 		return -EPERM;  in h_gpci_event_init()
825 		return -EINVAL;  in h_gpci_event_init()
866 		return -1;  in ppc_hv_gpci_cpu_offline()
901 	arg->params.counter_request = cpu_to_be32(req);  in sysinfo_device_attr_create()
917 		sysfs_attr_init(&attr->attr);  in sysinfo_device_attr_create()
918 		attr->attr.mode = 0444;  in sysinfo_device_attr_create()
922 			attr->attr.name = "processor_bus_topology";  in sysinfo_device_attr_create()
923 			attr->show = processor_bus_topology_show;  in sysinfo_device_attr_create()
926 			attr->attr.name = "processor_config";  in sysinfo_device_attr_create()
927 			attr->show = processor_config_show;  in sysinfo_device_attr_create()
930 			attr->attr.name = "affinity_domain_via_virtual_processor";  in sysinfo_device_attr_create()
931 			attr->show = affinity_domain_via_virtual_processor_show;  in sysinfo_device_attr_create()
934 			attr->attr.name = "affinity_domain_via_domain";  in sysinfo_device_attr_create()
935 			attr->show = affinity_domain_via_domain_show;  in sysinfo_device_attr_create()
938 			attr->attr.name = "affinity_domain_via_partition";  in sysinfo_device_attr_create()
939 			attr->show = affinity_domain_via_partition_show;  in sysinfo_device_attr_create()
951 	struct device_attribute *attr[INTERFACE_NULL_ATTR - INTERFACE_PROCESSOR_BUS_TOPOLOGY_ATTR];  in add_sysinfo_interface_files()
954 	sysfs_count = INTERFACE_NULL_ATTR - INTERFACE_PROCESSOR_BUS_TOPOLOGY_ATTR;  in add_sysinfo_interface_files()
967 		interface_attrs[i + INTERFACE_PROCESSOR_BUS_TOPOLOGY_ATTR] = &attr[i]->attr;  in add_sysinfo_interface_files()
980 			i--;  in add_sysinfo_interface_files()
996 		return -ENODEV;  in hv_gpci_init()
1003 		return -ENODEV;  in hv_gpci_init()
1024 	arg->params.counter_request = cpu_to_be32(0x10);  in hv_gpci_init()
1030 		arg->params.counter_info_version_out = 0x8;  in hv_gpci_init()
1035 	 * required hv-gpci event list.  in hv_gpci_init()
1037 	if (arg->params.counter_info_version_out >= 0x8)  in hv_gpci_init()
1044 	r = perf_pmu_register(&h_gpci_pmu, h_gpci_pmu.name, -1);  in hv_gpci_init()