cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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perf_event.h (3215B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 * Performance event support - s390 specific definitions.
      4 *
      5 * Copyright IBM Corp. 2009, 2017
      6 * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
      7 *	      Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
      8 */
      9
     10#ifndef _ASM_S390_PERF_EVENT_H
     11#define _ASM_S390_PERF_EVENT_H
     12
     13#include <linux/perf_event.h>
     14#include <linux/device.h>
     15#include <asm/stacktrace.h>
     16
     17/* Per-CPU flags for PMU states */
     18#define PMU_F_RESERVED			0x1000
     19#define PMU_F_ENABLED			0x2000
     20#define PMU_F_IN_USE			0x4000
     21#define PMU_F_ERR_IBE			0x0100
     22#define PMU_F_ERR_LSDA			0x0200
     23#define PMU_F_ERR_MASK			(PMU_F_ERR_IBE|PMU_F_ERR_LSDA)
     24
     25/* Perf definitions for PMU event attributes in sysfs */
     26extern __init const struct attribute_group **cpumf_cf_event_group(void);
     27extern ssize_t cpumf_events_sysfs_show(struct device *dev,
     28				       struct device_attribute *attr,
     29				       char *page);
     30#define EVENT_VAR(_cat, _name)		event_attr_##_cat##_##_name
     31#define EVENT_PTR(_cat, _name)		(&EVENT_VAR(_cat, _name).attr.attr)
     32
     33#define CPUMF_EVENT_ATTR(cat, name, id)			\
     34	PMU_EVENT_ATTR(name, EVENT_VAR(cat, name), id, cpumf_events_sysfs_show)
     35#define CPUMF_EVENT_PTR(cat, name)	EVENT_PTR(cat, name)
     36
     37
     38/* Perf callbacks */
     39struct pt_regs;
     40extern unsigned long perf_instruction_pointer(struct pt_regs *regs);
     41extern unsigned long perf_misc_flags(struct pt_regs *regs);
     42#define perf_misc_flags(regs) perf_misc_flags(regs)
     43#define perf_arch_bpf_user_pt_regs(regs) &regs->user_regs
     44
     45/* Perf pt_regs extension for sample-data-entry indicators */
     46struct perf_sf_sde_regs {
     47	unsigned char in_guest:1;	  /* guest sample */
     48	unsigned long reserved:63;	  /* reserved */
     49};
     50
     51/* Perf PMU definitions for the counter facility */
     52#define PERF_CPUM_CF_MAX_CTR		0xffffUL  /* Max ctr for ECCTR */
     53
     54/* Perf PMU definitions for the sampling facility */
     55#define PERF_CPUM_SF_MAX_CTR		2
     56#define PERF_EVENT_CPUM_SF		0xB0000UL /* Event: Basic-sampling */
     57#define PERF_EVENT_CPUM_SF_DIAG		0xBD000UL /* Event: Combined-sampling */
     58#define PERF_EVENT_CPUM_CF_DIAG		0xBC000UL /* Event: Counter sets */
     59#define PERF_CPUM_SF_BASIC_MODE		0x0001	  /* Basic-sampling flag */
     60#define PERF_CPUM_SF_DIAG_MODE		0x0002	  /* Diagnostic-sampling flag */
     61#define PERF_CPUM_SF_MODE_MASK		(PERF_CPUM_SF_BASIC_MODE| \
     62					 PERF_CPUM_SF_DIAG_MODE)
     63#define PERF_CPUM_SF_FULL_BLOCKS	0x0004	  /* Process full SDBs only */
     64#define PERF_CPUM_SF_FREQ_MODE		0x0008	  /* Sampling with frequency */
     65
     66#define REG_NONE		0
     67#define REG_OVERFLOW		1
     68#define OVERFLOW_REG(hwc)	((hwc)->extra_reg.config)
     69#define SFB_ALLOC_REG(hwc)	((hwc)->extra_reg.alloc)
     70#define TEAR_REG(hwc)		((hwc)->last_tag)
     71#define SAMPL_RATE(hwc)		((hwc)->event_base)
     72#define SAMPL_FLAGS(hwc)	((hwc)->config_base)
     73#define SAMPL_DIAG_MODE(hwc)	(SAMPL_FLAGS(hwc) & PERF_CPUM_SF_DIAG_MODE)
     74#define SDB_FULL_BLOCKS(hwc)	(SAMPL_FLAGS(hwc) & PERF_CPUM_SF_FULL_BLOCKS)
     75#define SAMPLE_FREQ_MODE(hwc)	(SAMPL_FLAGS(hwc) & PERF_CPUM_SF_FREQ_MODE)
     76
     77#define perf_arch_fetch_caller_regs(regs, __ip) do {			\
     78	(regs)->psw.addr = (__ip);					\
     79	(regs)->gprs[15] = (unsigned long)__builtin_frame_address(0) -	\
     80		offsetof(struct stack_frame, back_chain);		\
     81} while (0)
     82
     83#endif /* _ASM_S390_PERF_EVENT_H */