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/*
* Intel(R) Processor Trace PMU driver for perf
* Copyright (c) 2013-2014, Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* Intel PT is specified in the Intel Architecture Instruction Set Extensions
* Programming Reference:
* http://software.intel.com/en-us/intel-isa-extensions
*/
#ifndef __INTEL_PT_H__
#define __INTEL_PT_H__
/*
* Single-entry ToPA: when this close to region boundary, switch
* buffers to avoid losing data.
*/
#define TOPA_PMI_MARGIN 512
#define TOPA_SHIFT 12
static inline unsigned int sizes(unsigned int tsz)
{
return 1 << (tsz + TOPA_SHIFT);
};
struct topa_entry {
u64 end : 1;
u64 rsvd0 : 1;
u64 intr : 1;
u64 rsvd1 : 1;
u64 stop : 1;
u64 rsvd2 : 1;
u64 size : 4;
u64 rsvd3 : 2;
u64 base : 36;
u64 rsvd4 : 16;
};
/* TSC to Core Crystal Clock Ratio */
#define CPUID_TSC_LEAF 0x15
struct pt_pmu {
struct pmu pmu;
u32 caps[PT_CPUID_REGS_NUM * PT_CPUID_LEAVES];
bool vmx;
bool branch_en_always_on;
unsigned long max_nonturbo_ratio;
unsigned int tsc_art_num;
unsigned int tsc_art_den;
};
/**
* struct pt_buffer - buffer configuration; one buffer per task_struct or
* cpu, depending on perf event configuration
* @cpu: cpu for per-cpu allocation
* @tables: list of ToPA tables in this buffer
* @first: shorthand for first topa table
* @last: shorthand for last topa table
* @cur: current topa table
* @nr_pages: buffer size in pages
* @cur_idx: current output region's index within @cur table
* @output_off: offset within the current output region
* @data_size: running total of the amount of data in this buffer
* @lost: if data was lost/truncated
* @head: logical write offset inside the buffer
* @snapshot: if this is for a snapshot/overwrite counter
* @stop_pos: STOP topa entry in the buffer
* @intr_pos: INT topa entry in the buffer
* @data_pages: array of pages from perf
* @topa_index: table of topa entries indexed by page offset
*/
struct pt_buffer {
int cpu;
struct list_head tables;
struct topa *first, *last, *cur;
unsigned int cur_idx;
size_t output_off;
unsigned long nr_pages;
local_t data_size;
local64_t head;
bool snapshot;
unsigned long stop_pos, intr_pos;
void **data_pages;
struct topa_entry *topa_index[0];
};
#define PT_FILTERS_NUM 4
/**
* struct pt_filter - IP range filter configuration
* @msr_a: range start, goes to RTIT_ADDRn_A
* @msr_b: range end, goes to RTIT_ADDRn_B
* @config: 4-bit field in RTIT_CTL
*/
struct pt_filter {
unsigned long msr_a;
unsigned long msr_b;
unsigned long config;
};
/**
* struct pt_filters - IP range filtering context
* @filter: filters defined for this context
* @nr_filters: number of defined filters in the @filter array
*/
struct pt_filters {
struct pt_filter filter[PT_FILTERS_NUM];
unsigned int nr_filters;
};
/**
* struct pt - per-cpu pt context
* @handle: perf output handle
* @filters: last configured filters
* @handle_nmi: do handle PT PMI on this cpu, there's an active event
* @vmx_on: 1 if VMX is ON on this cpu
*/
struct pt {
struct perf_output_handle handle;
struct pt_filters filters;
int handle_nmi;
int vmx_on;
};
#endif /* __INTEL_PT_H__ */
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