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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef RESCTRL_H
#define RESCTRL_H
#include <stdio.h>
#include <math.h>
#include <errno.h>
#include <sched.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <signal.h>
#include <dirent.h>
#include <stdbool.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/mount.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/select.h>
#include <sys/time.h>
#include <sys/eventfd.h>
#include <asm/unistd.h>
#include <linux/perf_event.h>
#include "../kselftest.h"
#define MB (1024 * 1024)
#define RESCTRL_PATH "/sys/fs/resctrl"
#define PHYS_ID_PATH "/sys/devices/system/cpu/cpu"
#define INFO_PATH "/sys/fs/resctrl/info"
#define ARCH_INTEL 1
#define ARCH_AMD 2
#define END_OF_TESTS 1
#define BENCHMARK_ARGS 64
#define DEFAULT_SPAN (250 * MB)
#define PARENT_EXIT() \
do { \
kill(ppid, SIGKILL); \
umount_resctrlfs(); \
exit(EXIT_FAILURE); \
} while (0)
/*
* resctrl_val_param: resctrl test parameters
* @resctrl_val: Resctrl feature (Eg: mbm, mba.. etc)
* @ctrlgrp: Name of the control monitor group (con_mon grp)
* @mongrp: Name of the monitor group (mon grp)
* @cpu_no: CPU number to which the benchmark would be binded
* @filename: Name of file to which the o/p should be written
* @bw_report: Bandwidth report type (reads vs writes)
* @setup: Call back function to setup test environment
*/
struct resctrl_val_param {
char *resctrl_val;
char ctrlgrp[64];
char mongrp[64];
int cpu_no;
char filename[64];
char *bw_report;
unsigned long mask;
int num_of_runs;
int (*setup)(struct resctrl_val_param *param);
};
#define MBM_STR "mbm"
#define MBA_STR "mba"
#define CMT_STR "cmt"
#define CAT_STR "cat"
extern pid_t bm_pid, ppid;
extern char llc_occup_path[1024];
int get_vendor(void);
bool check_resctrlfs_support(void);
int filter_dmesg(void);
int get_resource_id(int cpu_no, int *resource_id);
int mount_resctrlfs(void);
int umount_resctrlfs(void);
int validate_bw_report_request(char *bw_report);
bool validate_resctrl_feature_request(const char *resource, const char *feature);
char *fgrep(FILE *inf, const char *str);
int taskset_benchmark(pid_t bm_pid, int cpu_no);
int write_schemata(char *ctrlgrp, char *schemata, int cpu_no,
char *resctrl_val);
int write_bm_pid_to_resctrl(pid_t bm_pid, char *ctrlgrp, char *mongrp,
char *resctrl_val);
int perf_event_open(struct perf_event_attr *hw_event, pid_t pid, int cpu,
int group_fd, unsigned long flags);
int run_fill_buf(size_t buf_size, int memflush, int op, bool once);
int resctrl_val(const char * const *benchmark_cmd, struct resctrl_val_param *param);
int mbm_bw_change(int cpu_no, const char * const *benchmark_cmd);
void tests_cleanup(void);
void mbm_test_cleanup(void);
int mba_schemata_change(int cpu_no, const char * const *benchmark_cmd);
void mba_test_cleanup(void);
unsigned long create_bit_mask(unsigned int start, unsigned int len);
int get_full_cbm(const char *cache_type, unsigned long *mask);
int get_mask_no_shareable(const char *cache_type, unsigned long *mask);
int get_cache_size(int cpu_no, const char *cache_type, unsigned long *cache_size);
void ctrlc_handler(int signum, siginfo_t *info, void *ptr);
int signal_handler_register(void);
void signal_handler_unregister(void);
int cat_val(struct resctrl_val_param *param, size_t span);
void cat_test_cleanup(void);
int cat_perf_miss_val(int cpu_no, int no_of_bits, char *cache_type);
int cmt_resctrl_val(int cpu_no, int n, const char * const *benchmark_cmd);
unsigned int count_bits(unsigned long n);
void cmt_test_cleanup(void);
int get_core_sibling(int cpu_no);
int measure_cache_vals(struct resctrl_val_param *param, int bm_pid);
int show_cache_info(unsigned long sum_llc_val, int no_of_bits,
size_t cache_span, unsigned long max_diff,
unsigned long max_diff_percent, unsigned long num_of_runs,
bool platform, bool cmt);
/*
* cache_portion_size - Calculate the size of a cache portion
* @cache_size: Total cache size in bytes
* @portion_mask: Cache portion mask
* @full_cache_mask: Full Cache Bit Mask (CBM) for the cache
*
* Return: The size of the cache portion in bytes.
*/
static inline unsigned long cache_portion_size(unsigned long cache_size,
unsigned long portion_mask,
unsigned long full_cache_mask)
{
unsigned int bits = count_bits(full_cache_mask);
/*
* With no bits the full CBM, assume cache cannot be split into
* smaller portions. To avoid divide by zero, return cache_size.
*/
if (!bits)
return cache_size;
return cache_size * count_bits(portion_mask) / bits;
}
#endif /* RESCTRL_H */
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