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Diffstat (limited to 'arch/powerpc/perf/hv-24x7.h')
| -rw-r--r-- | arch/powerpc/perf/hv-24x7.h | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/arch/powerpc/perf/hv-24x7.h b/arch/powerpc/perf/hv-24x7.h new file mode 100644 index 000000000..ae4ae4813 --- /dev/null +++ b/arch/powerpc/perf/hv-24x7.h @@ -0,0 +1,160 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef LINUX_POWERPC_PERF_HV_24X7_H_ +#define LINUX_POWERPC_PERF_HV_24X7_H_ + +#include <linux/types.h> + +enum hv_perf_domains { +#define DOMAIN(n, v, x, c) HV_PERF_DOMAIN_##n = v, +#include "hv-24x7-domains.h" +#undef DOMAIN + HV_PERF_DOMAIN_MAX, +}; + +#define H24x7_REQUEST_SIZE(iface_version) (iface_version == 1 ? 16 : 32) + +struct hv_24x7_request { + /* PHYSICAL domains require enabling via phyp/hmc. */ + __u8 performance_domain; + __u8 reserved[0x1]; + + /* bytes to read starting at @data_offset. must be a multiple of 8 */ + __be16 data_size; + + /* + * byte offset within the perf domain to read from. must be 8 byte + * aligned + */ + __be32 data_offset; + + /* + * only valid for VIRTUAL_PROCESSOR domains, ignored for others. + * -1 means "current partition only" + * Enabling via phyp/hmc required for non-"-1" values. 0 forbidden + * unless requestor is 0. + */ + __be16 starting_lpar_ix; + + /* + * Ignored when @starting_lpar_ix == -1 + * Ignored when @performance_domain is not VIRTUAL_PROCESSOR_* + * -1 means "infinite" or all + */ + __be16 max_num_lpars; + + /* chip, core, or virtual processor based on @performance_domain */ + __be16 starting_ix; + __be16 max_ix; + + /* The following fields were added in v2 of the 24x7 interface. */ + + __u8 starting_thread_group_ix; + + /* -1 means all thread groups starting at @starting_thread_group_ix */ + __u8 max_num_thread_groups; + + __u8 reserved2[0xE]; +} __packed; + +struct hv_24x7_request_buffer { + /* 0 - ? */ + /* 1 - ? */ + __u8 interface_version; + __u8 num_requests; + __u8 reserved[0xE]; + struct hv_24x7_request requests[]; +} __packed; + +struct hv_24x7_result_element_v1 { + __be16 lpar_ix; + + /* + * represents the core, chip, or virtual processor based on the + * request's @performance_domain + */ + __be16 domain_ix; + + /* -1 if @performance_domain does not refer to a virtual processor */ + __be32 lpar_cfg_instance_id; + + /* size = @result_element_data_size of containing result. */ + __u64 element_data[]; +} __packed; + +/* + * We need a separate struct for v2 because the offset of @element_data changed + * between versions. + */ +struct hv_24x7_result_element_v2 { + __be16 lpar_ix; + + /* + * represents the core, chip, or virtual processor based on the + * request's @performance_domain + */ + __be16 domain_ix; + + /* -1 if @performance_domain does not refer to a virtual processor */ + __be32 lpar_cfg_instance_id; + + __u8 thread_group_ix; + + __u8 reserved[7]; + + /* size = @result_element_data_size of containing result. */ + __u64 element_data[]; +} __packed; + +struct hv_24x7_result { + /* + * The index of the 24x7 Request Structure in the 24x7 Request Buffer + * used to request this result. + */ + __u8 result_ix; + + /* + * 0 = not all result elements fit into the buffer, additional requests + * required + * 1 = all result elements were returned + */ + __u8 results_complete; + __be16 num_elements_returned; + + /* + * This is a copy of @data_size from the corresponding hv_24x7_request + * + * Warning: to obtain the size of each element in @elements you have + * to add the size of the other members of the result_element struct. + */ + __be16 result_element_data_size; + __u8 reserved[0x2]; + + /* + * Either + * struct hv_24x7_result_element_v1[@num_elements_returned] + * or + * struct hv_24x7_result_element_v2[@num_elements_returned] + * + * depending on the interface_version field of the + * struct hv_24x7_data_result_buffer containing this result. + */ + char elements[]; +} __packed; + +struct hv_24x7_data_result_buffer { + /* See versioning for request buffer */ + __u8 interface_version; + + __u8 num_results; + __u8 reserved[0x1]; + __u8 failing_request_ix; + __be32 detailed_rc; + __be64 cec_cfg_instance_id; + __be64 catalog_version_num; + __u8 reserved2[0x8]; + /* WARNING: only valid for the first result due to variable sizes of + * results */ + struct hv_24x7_result results[]; /* [@num_results] */ +} __packed; + +#endif |