a67f144739
"H_GetPerformanceCounterInfo" (refered to as hv_gpci or just gpci from here on) is an interface to retrieve specific performance counters and other data from the hypervisor. All outputs have a fixed format. This header only describes the portions of the interface that we plan on using in linux at this time. Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
73 lines
1.8 KiB
C
73 lines
1.8 KiB
C
#ifndef LINUX_POWERPC_PERF_HV_GPCI_H_
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#define LINUX_POWERPC_PERF_HV_GPCI_H_
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#include <linux/types.h>
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/* From the document "H_GetPerformanceCounterInfo Interface" v1.07 */
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/* H_GET_PERF_COUNTER_INFO argument */
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struct hv_get_perf_counter_info_params {
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__be32 counter_request; /* I */
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__be32 starting_index; /* IO */
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__be16 secondary_index; /* IO */
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__be16 returned_values; /* O */
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__be32 detail_rc; /* O, only needed when called via *_norets() */
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/*
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* O, size each of counter_value element in bytes, only set for version
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* >= 0x3
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*/
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__be16 cv_element_size;
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/* I, 0 (zero) for versions < 0x3 */
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__u8 counter_info_version_in;
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/* O, 0 (zero) if version < 0x3. Must be set to 0 when making hcall */
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__u8 counter_info_version_out;
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__u8 reserved[0xC];
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__u8 counter_value[];
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} __packed;
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/*
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* counter info version => fw version/reference (spec version)
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*
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* 8 => power8 (1.07)
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* [7 is skipped by spec 1.07]
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* 6 => TLBIE (1.07)
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* 5 => v7r7m0.phyp (1.05)
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* [4 skipped]
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* 3 => v7r6m0.phyp (?)
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* [1,2 skipped]
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* 0 => v7r{2,3,4}m0.phyp (?)
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*/
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#define COUNTER_INFO_VERSION_CURRENT 0x8
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/*
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* These determine the counter_value[] layout and the meaning of starting_index
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* and secondary_index.
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*
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* Unless otherwise noted, @secondary_index is unused and ignored.
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*/
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enum counter_info_requests {
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/* GENERAL */
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/* @starting_index: must be -1 (to refer to the current partition)
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*/
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CIR_SYSTEM_PERFORMANCE_CAPABILITIES = 0X40,
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};
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struct cv_system_performance_capabilities {
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/* If != 0, allowed to collect data from other partitions */
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__u8 perf_collect_privileged;
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/* These following are only valid if counter_info_version >= 0x3 */
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#define CV_CM_GA (1 << 7)
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#define CV_CM_EXPANDED (1 << 6)
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#define CV_CM_LAB (1 << 5)
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/* remaining bits are reserved */
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__u8 capability_mask;
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__u8 reserved[0xE];
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} __packed;
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#endif
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