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s390/cpum_cf: merge source files for CPU Measurement counter facility
With no in-kernel user, the source files can be merged. Move all functions and the variable definitions to file perf_cpum_cf.c This file now contains all the necessary functions and definitions for the CPU Measurement counter facility device driver. The files cpu_mcf.h and perf_cpum_cf_common.c are deleted. Signed-off-by: Thomas Richter <tmricht@linux.ibm.com> Acked-by: Hendrik Brueckner <brueckner@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Thomas Richter
Heiko Carstens
parent
ea53e6995f
commit
1e99c242ac
5 changed files with 208 additions and 260 deletions
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@ -1,87 +0,0 @@
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Counter facility support definitions for the Linux perf
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*
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* Copyright IBM Corp. 2019
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* Author(s): Hendrik Brueckner <brueckner@linux.ibm.com>
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*/
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#ifndef _ASM_S390_CPU_MCF_H
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#define _ASM_S390_CPU_MCF_H
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#include <linux/perf_event.h>
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#include <asm/cpu_mf.h>
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enum cpumf_ctr_set {
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CPUMF_CTR_SET_BASIC = 0, /* Basic Counter Set */
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CPUMF_CTR_SET_USER = 1, /* Problem-State Counter Set */
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CPUMF_CTR_SET_CRYPTO = 2, /* Crypto-Activity Counter Set */
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CPUMF_CTR_SET_EXT = 3, /* Extended Counter Set */
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CPUMF_CTR_SET_MT_DIAG = 4, /* MT-diagnostic Counter Set */
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/* Maximum number of counter sets */
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CPUMF_CTR_SET_MAX,
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};
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#define CPUMF_LCCTL_ENABLE_SHIFT 16
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#define CPUMF_LCCTL_ACTCTL_SHIFT 0
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static inline void ctr_set_enable(u64 *state, u64 ctrsets)
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{
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*state |= ctrsets << CPUMF_LCCTL_ENABLE_SHIFT;
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}
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static inline void ctr_set_disable(u64 *state, u64 ctrsets)
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{
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*state &= ~(ctrsets << CPUMF_LCCTL_ENABLE_SHIFT);
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}
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static inline void ctr_set_start(u64 *state, u64 ctrsets)
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{
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*state |= ctrsets << CPUMF_LCCTL_ACTCTL_SHIFT;
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}
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static inline void ctr_set_stop(u64 *state, u64 ctrsets)
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{
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*state &= ~(ctrsets << CPUMF_LCCTL_ACTCTL_SHIFT);
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}
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static inline int ctr_stcctm(enum cpumf_ctr_set set, u64 range, u64 *dest)
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{
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switch (set) {
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case CPUMF_CTR_SET_BASIC:
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return stcctm(BASIC, range, dest);
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case CPUMF_CTR_SET_USER:
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return stcctm(PROBLEM_STATE, range, dest);
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case CPUMF_CTR_SET_CRYPTO:
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return stcctm(CRYPTO_ACTIVITY, range, dest);
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case CPUMF_CTR_SET_EXT:
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return stcctm(EXTENDED, range, dest);
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case CPUMF_CTR_SET_MT_DIAG:
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return stcctm(MT_DIAG_CLEARING, range, dest);
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case CPUMF_CTR_SET_MAX:
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return 3;
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}
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return 3;
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}
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struct cpu_cf_events {
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struct cpumf_ctr_info info;
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atomic_t ctr_set[CPUMF_CTR_SET_MAX];
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u64 state; /* For perf_event_open SVC */
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u64 dev_state; /* For /dev/hwctr */
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unsigned int flags;
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size_t used; /* Bytes used in data */
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size_t usedss; /* Bytes used in start/stop */
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unsigned char start[PAGE_SIZE]; /* Counter set at event add */
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unsigned char stop[PAGE_SIZE]; /* Counter set at event delete */
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unsigned char data[PAGE_SIZE]; /* Counter set at /dev/hwctr */
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unsigned int sets; /* # Counter set saved in memory */
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};
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DECLARE_PER_CPU(struct cpu_cf_events, cpu_cf_events);
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int __kernel_cpumcf_begin(void);
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void __kernel_cpumcf_end(void);
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int cfset_online_cpu(unsigned int cpu);
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int cfset_offline_cpu(unsigned int cpu);
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#endif /* _ASM_S390_CPU_MCF_H */
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@ -70,7 +70,7 @@ obj-$(CONFIG_KEXEC_FILE) += kexec_elf.o
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obj-$(CONFIG_IMA_SECURE_AND_OR_TRUSTED_BOOT) += ima_arch.o
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obj-$(CONFIG_PERF_EVENTS) += perf_event.o perf_cpum_cf_common.o
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obj-$(CONFIG_PERF_EVENTS) += perf_event.o
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obj-$(CONFIG_PERF_EVENTS) += perf_cpum_cf.o perf_cpum_sf.o
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obj-$(CONFIG_PERF_EVENTS) += perf_cpum_cf_events.o perf_regs.o
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obj-$(CONFIG_PERF_EVENTS) += perf_pai_crypto.o perf_pai_ext.o
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@ -2,7 +2,7 @@
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/*
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* Performance event support for s390x - CPU-measurement Counter Facility
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*
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* Copyright IBM Corp. 2012, 2022
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* Copyright IBM Corp. 2012, 2023
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* Author(s): Hendrik Brueckner <brueckner@linux.ibm.com>
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* Thomas Richter <tmricht@linux.ibm.com>
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*/
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@ -16,11 +16,82 @@
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#include <linux/init.h>
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#include <linux/export.h>
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#include <linux/miscdevice.h>
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#include <linux/perf_event.h>
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#include <asm/cpu_mcf.h>
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#include <asm/cpu_mf.h>
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#include <asm/hwctrset.h>
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#include <asm/debug.h>
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enum cpumf_ctr_set {
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CPUMF_CTR_SET_BASIC = 0, /* Basic Counter Set */
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CPUMF_CTR_SET_USER = 1, /* Problem-State Counter Set */
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CPUMF_CTR_SET_CRYPTO = 2, /* Crypto-Activity Counter Set */
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CPUMF_CTR_SET_EXT = 3, /* Extended Counter Set */
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CPUMF_CTR_SET_MT_DIAG = 4, /* MT-diagnostic Counter Set */
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/* Maximum number of counter sets */
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CPUMF_CTR_SET_MAX,
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};
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#define CPUMF_LCCTL_ENABLE_SHIFT 16
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#define CPUMF_LCCTL_ACTCTL_SHIFT 0
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static inline void ctr_set_enable(u64 *state, u64 ctrsets)
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{
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*state |= ctrsets << CPUMF_LCCTL_ENABLE_SHIFT;
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}
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static inline void ctr_set_disable(u64 *state, u64 ctrsets)
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{
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*state &= ~(ctrsets << CPUMF_LCCTL_ENABLE_SHIFT);
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}
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static inline void ctr_set_start(u64 *state, u64 ctrsets)
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{
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*state |= ctrsets << CPUMF_LCCTL_ACTCTL_SHIFT;
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}
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static inline void ctr_set_stop(u64 *state, u64 ctrsets)
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{
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*state &= ~(ctrsets << CPUMF_LCCTL_ACTCTL_SHIFT);
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}
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static inline int ctr_stcctm(enum cpumf_ctr_set set, u64 range, u64 *dest)
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{
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switch (set) {
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case CPUMF_CTR_SET_BASIC:
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return stcctm(BASIC, range, dest);
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case CPUMF_CTR_SET_USER:
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return stcctm(PROBLEM_STATE, range, dest);
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case CPUMF_CTR_SET_CRYPTO:
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return stcctm(CRYPTO_ACTIVITY, range, dest);
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case CPUMF_CTR_SET_EXT:
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return stcctm(EXTENDED, range, dest);
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case CPUMF_CTR_SET_MT_DIAG:
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return stcctm(MT_DIAG_CLEARING, range, dest);
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case CPUMF_CTR_SET_MAX:
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return 3;
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}
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return 3;
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}
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struct cpu_cf_events {
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struct cpumf_ctr_info info;
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atomic_t ctr_set[CPUMF_CTR_SET_MAX];
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u64 state; /* For perf_event_open SVC */
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u64 dev_state; /* For /dev/hwctr */
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unsigned int flags;
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size_t used; /* Bytes used in data */
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size_t usedss; /* Bytes used in start/stop */
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unsigned char start[PAGE_SIZE]; /* Counter set at event add */
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unsigned char stop[PAGE_SIZE]; /* Counter set at event delete */
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unsigned char data[PAGE_SIZE]; /* Counter set at /dev/hwctr */
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unsigned int sets; /* # Counter set saved in memory */
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};
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/* Per-CPU event structure for the counter facility */
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static DEFINE_PER_CPU(struct cpu_cf_events, cpu_cf_events);
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static unsigned int cfdiag_cpu_speed; /* CPU speed for CF_DIAG trailer */
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static debug_info_t *cf_dbg;
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@ -435,6 +506,51 @@ static void cpumf_pmu_disable(struct pmu *pmu)
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cpuhw->flags &= ~PMU_F_ENABLED;
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}
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#define PMC_INIT 0
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#define PMC_RELEASE 1
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static void cpum_cf_setup_cpu(void *flags)
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{
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struct cpu_cf_events *cpuhw = this_cpu_ptr(&cpu_cf_events);
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switch (*((int *)flags)) {
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case PMC_INIT:
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memset(&cpuhw->info, 0, sizeof(cpuhw->info));
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qctri(&cpuhw->info);
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cpuhw->flags |= PMU_F_RESERVED;
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break;
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case PMC_RELEASE:
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cpuhw->flags &= ~PMU_F_RESERVED;
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break;
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}
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/* Disable CPU counter sets */
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lcctl(0);
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debug_sprintf_event(cf_dbg, 5, "%s flags %#x flags %#x state %#llx\n",
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__func__, *(int *)flags, cpuhw->flags,
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cpuhw->state);
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}
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/* Initialize the CPU-measurement counter facility */
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static int __kernel_cpumcf_begin(void)
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{
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int flags = PMC_INIT;
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on_each_cpu(cpum_cf_setup_cpu, &flags, 1);
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irq_subclass_register(IRQ_SUBCLASS_MEASUREMENT_ALERT);
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return 0;
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}
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/* Release the CPU-measurement counter facility */
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static void __kernel_cpumcf_end(void)
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{
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int flags = PMC_RELEASE;
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on_each_cpu(cpum_cf_setup_cpu, &flags, 1);
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irq_subclass_unregister(IRQ_SUBCLASS_MEASUREMENT_ALERT);
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}
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/* Number of perf events counting hardware events */
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static atomic_t num_events = ATOMIC_INIT(0);
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@ -821,12 +937,70 @@ static struct pmu cpumf_pmu = {
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.read = cpumf_pmu_read,
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};
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static int cpum_cf_setup(unsigned int cpu, int flags)
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{
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local_irq_disable();
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cpum_cf_setup_cpu(&flags);
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local_irq_enable();
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return 0;
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}
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static int cfset_online_cpu(unsigned int cpu);
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static int cpum_cf_online_cpu(unsigned int cpu)
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{
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debug_sprintf_event(cf_dbg, 4, "%s cpu %d in_irq %ld\n", __func__,
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cpu, in_interrupt());
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cpum_cf_setup(cpu, PMC_INIT);
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return cfset_online_cpu(cpu);
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}
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static int cfset_offline_cpu(unsigned int cpu);
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static int cpum_cf_offline_cpu(unsigned int cpu)
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{
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debug_sprintf_event(cf_dbg, 4, "%s cpu %d\n", __func__, cpu);
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cfset_offline_cpu(cpu);
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return cpum_cf_setup(cpu, PMC_RELEASE);
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}
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/* Return true if store counter set multiple instruction is available */
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static inline int stccm_avail(void)
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{
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return test_facility(142);
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}
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/* CPU-measurement alerts for the counter facility */
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static void cpumf_measurement_alert(struct ext_code ext_code,
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unsigned int alert, unsigned long unused)
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{
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struct cpu_cf_events *cpuhw;
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if (!(alert & CPU_MF_INT_CF_MASK))
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return;
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inc_irq_stat(IRQEXT_CMC);
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cpuhw = this_cpu_ptr(&cpu_cf_events);
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/*
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* Measurement alerts are shared and might happen when the PMU
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* is not reserved. Ignore these alerts in this case.
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*/
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if (!(cpuhw->flags & PMU_F_RESERVED))
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return;
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/* counter authorization change alert */
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if (alert & CPU_MF_INT_CF_CACA)
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qctri(&cpuhw->info);
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/* loss of counter data alert */
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if (alert & CPU_MF_INT_CF_LCDA)
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pr_err("CPU[%i] Counter data was lost\n", smp_processor_id());
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/* loss of MT counter data alert */
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if (alert & CPU_MF_INT_CF_MTDA)
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pr_warn("CPU[%i] MT counter data was lost\n",
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smp_processor_id());
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}
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static int cfset_init(void);
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static int __init cpumf_pmu_init(void)
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{
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@ -835,23 +1009,48 @@ static int __init cpumf_pmu_init(void)
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if (!cpum_cf_avail())
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return -ENODEV;
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/*
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* Clear bit 15 of cr0 to unauthorize problem-state to
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* extract measurement counters
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*/
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ctl_clear_bit(0, 48);
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/* register handler for measurement-alert interruptions */
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rc = register_external_irq(EXT_IRQ_MEASURE_ALERT,
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cpumf_measurement_alert);
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if (rc) {
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pr_err("Registering for CPU-measurement alerts failed with rc=%i\n", rc);
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return rc;
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}
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/* Setup s390dbf facility */
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cf_dbg = debug_register(KMSG_COMPONENT, 2, 1, 128);
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if (!cf_dbg) {
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pr_err("Registration of s390dbf(cpum_cf) failed\n");
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return -ENOMEM;
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rc = -ENOMEM;
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goto out1;
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}
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debug_register_view(cf_dbg, &debug_sprintf_view);
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cpumf_pmu.attr_groups = cpumf_cf_event_group();
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rc = perf_pmu_register(&cpumf_pmu, "cpum_cf", -1);
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if (rc) {
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debug_unregister_view(cf_dbg, &debug_sprintf_view);
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debug_unregister(cf_dbg);
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pr_err("Registering the cpum_cf PMU failed with rc=%i\n", rc);
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goto out2;
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} else if (stccm_avail()) { /* Setup counter set device */
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cfset_init();
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}
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rc = cpuhp_setup_state(CPUHP_AP_PERF_S390_CF_ONLINE,
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"perf/s390/cf:online",
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cpum_cf_online_cpu, cpum_cf_offline_cpu);
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return rc;
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out2:
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debug_unregister_view(cf_dbg, &debug_sprintf_view);
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debug_unregister(cf_dbg);
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out1:
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unregister_external_irq(EXT_IRQ_MEASURE_ALERT, cpumf_measurement_alert);
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return rc;
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}
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@ -1069,7 +1268,6 @@ static int cfset_all_start(struct cfset_request *req)
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return rc;
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}
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/* Return the maximum required space for all possible CPUs in case one
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* CPU will be onlined during the START, READ, STOP cycles.
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* To find out the size of the counter sets, any one CPU will do. They
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@ -1332,7 +1530,7 @@ static struct miscdevice cfset_dev = {
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/* Hotplug add of a CPU. Scan through all active processes and add
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* that CPU to the list of CPUs supplied with ioctl(..., START, ...).
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*/
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int cfset_online_cpu(unsigned int cpu)
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static int cfset_online_cpu(unsigned int cpu)
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{
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struct cfset_call_on_cpu_parm p;
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struct cfset_request *rp;
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@ -1352,7 +1550,7 @@ int cfset_online_cpu(unsigned int cpu)
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/* Hotplug remove of a CPU. Scan through all active processes and clear
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* that CPU from the list of CPUs supplied with ioctl(..., START, ...).
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*/
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int cfset_offline_cpu(unsigned int cpu)
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static int cfset_offline_cpu(unsigned int cpu)
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{
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struct cfset_call_on_cpu_parm p;
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struct cfset_request *rp;
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@ -1,163 +0,0 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* CPU-Measurement Counter Facility Support - Common Layer
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*
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* Copyright IBM Corp. 2019
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* Author(s): Hendrik Brueckner <brueckner@linux.ibm.com>
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*/
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#define KMSG_COMPONENT "cpum_cf_common"
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#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
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#include <linux/kernel.h>
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#include <linux/kernel_stat.h>
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#include <linux/percpu.h>
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#include <linux/notifier.h>
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#include <linux/init.h>
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#include <linux/export.h>
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#include <asm/ctl_reg.h>
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#include <asm/irq.h>
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#include <asm/cpu_mcf.h>
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/* Per-CPU event structure for the counter facility */
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DEFINE_PER_CPU(struct cpu_cf_events, cpu_cf_events) = {
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.ctr_set = {
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[CPUMF_CTR_SET_BASIC] = ATOMIC_INIT(0),
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[CPUMF_CTR_SET_USER] = ATOMIC_INIT(0),
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[CPUMF_CTR_SET_CRYPTO] = ATOMIC_INIT(0),
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[CPUMF_CTR_SET_EXT] = ATOMIC_INIT(0),
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[CPUMF_CTR_SET_MT_DIAG] = ATOMIC_INIT(0),
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},
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.state = 0,
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.dev_state = 0,
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.flags = 0,
|
||||
.used = 0,
|
||||
.usedss = 0,
|
||||
.sets = 0
|
||||
};
|
||||
/* Indicator whether the CPU-Measurement Counter Facility Support is ready */
|
||||
static bool cpum_cf_initalized;
|
||||
|
||||
/* CPU-measurement alerts for the counter facility */
|
||||
static void cpumf_measurement_alert(struct ext_code ext_code,
|
||||
unsigned int alert, unsigned long unused)
|
||||
{
|
||||
struct cpu_cf_events *cpuhw;
|
||||
|
||||
if (!(alert & CPU_MF_INT_CF_MASK))
|
||||
return;
|
||||
|
||||
inc_irq_stat(IRQEXT_CMC);
|
||||
cpuhw = this_cpu_ptr(&cpu_cf_events);
|
||||
|
||||
/* Measurement alerts are shared and might happen when the PMU
|
||||
* is not reserved. Ignore these alerts in this case. */
|
||||
if (!(cpuhw->flags & PMU_F_RESERVED))
|
||||
return;
|
||||
|
||||
/* counter authorization change alert */
|
||||
if (alert & CPU_MF_INT_CF_CACA)
|
||||
qctri(&cpuhw->info);
|
||||
|
||||
/* loss of counter data alert */
|
||||
if (alert & CPU_MF_INT_CF_LCDA)
|
||||
pr_err("CPU[%i] Counter data was lost\n", smp_processor_id());
|
||||
|
||||
/* loss of MT counter data alert */
|
||||
if (alert & CPU_MF_INT_CF_MTDA)
|
||||
pr_warn("CPU[%i] MT counter data was lost\n",
|
||||
smp_processor_id());
|
||||
}
|
||||
|
||||
#define PMC_INIT 0
|
||||
#define PMC_RELEASE 1
|
||||
static void cpum_cf_setup_cpu(void *flags)
|
||||
{
|
||||
struct cpu_cf_events *cpuhw = this_cpu_ptr(&cpu_cf_events);
|
||||
|
||||
switch (*((int *) flags)) {
|
||||
case PMC_INIT:
|
||||
memset(&cpuhw->info, 0, sizeof(cpuhw->info));
|
||||
qctri(&cpuhw->info);
|
||||
cpuhw->flags |= PMU_F_RESERVED;
|
||||
break;
|
||||
|
||||
case PMC_RELEASE:
|
||||
cpuhw->flags &= ~PMU_F_RESERVED;
|
||||
break;
|
||||
}
|
||||
|
||||
/* Disable CPU counter sets */
|
||||
lcctl(0);
|
||||
}
|
||||
|
||||
/* Initialize the CPU-measurement counter facility */
|
||||
int __kernel_cpumcf_begin(void)
|
||||
{
|
||||
int flags = PMC_INIT;
|
||||
|
||||
on_each_cpu(cpum_cf_setup_cpu, &flags, 1);
|
||||
irq_subclass_register(IRQ_SUBCLASS_MEASUREMENT_ALERT);
|
||||
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL(__kernel_cpumcf_begin);
|
||||
|
||||
/* Release the CPU-measurement counter facility */
|
||||
void __kernel_cpumcf_end(void)
|
||||
{
|
||||
int flags = PMC_RELEASE;
|
||||
|
||||
on_each_cpu(cpum_cf_setup_cpu, &flags, 1);
|
||||
irq_subclass_unregister(IRQ_SUBCLASS_MEASUREMENT_ALERT);
|
||||
}
|
||||
EXPORT_SYMBOL(__kernel_cpumcf_end);
|
||||
|
||||
static int cpum_cf_setup(unsigned int cpu, int flags)
|
||||
{
|
||||
local_irq_disable();
|
||||
cpum_cf_setup_cpu(&flags);
|
||||
local_irq_enable();
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int cpum_cf_online_cpu(unsigned int cpu)
|
||||
{
|
||||
cpum_cf_setup(cpu, PMC_INIT);
|
||||
return cfset_online_cpu(cpu);
|
||||
}
|
||||
|
||||
static int cpum_cf_offline_cpu(unsigned int cpu)
|
||||
{
|
||||
cfset_offline_cpu(cpu);
|
||||
return cpum_cf_setup(cpu, PMC_RELEASE);
|
||||
}
|
||||
|
||||
static int __init cpum_cf_init(void)
|
||||
{
|
||||
int rc;
|
||||
|
||||
if (!cpum_cf_avail())
|
||||
return -ENODEV;
|
||||
|
||||
/* clear bit 15 of cr0 to unauthorize problem-state to
|
||||
* extract measurement counters */
|
||||
ctl_clear_bit(0, 48);
|
||||
|
||||
/* register handler for measurement-alert interruptions */
|
||||
rc = register_external_irq(EXT_IRQ_MEASURE_ALERT,
|
||||
cpumf_measurement_alert);
|
||||
if (rc) {
|
||||
pr_err("Registering for CPU-measurement alerts "
|
||||
"failed with rc=%i\n", rc);
|
||||
return rc;
|
||||
}
|
||||
|
||||
rc = cpuhp_setup_state(CPUHP_AP_PERF_S390_CF_ONLINE,
|
||||
"perf/s390/cf:online",
|
||||
cpum_cf_online_cpu, cpum_cf_offline_cpu);
|
||||
if (!rc)
|
||||
cpum_cf_initalized = true;
|
||||
|
||||
return rc;
|
||||
}
|
||||
early_initcall(cpum_cf_init);
|
||||
|
|
@ -16,8 +16,8 @@
|
|||
#include <linux/init.h>
|
||||
#include <linux/export.h>
|
||||
#include <linux/io.h>
|
||||
#include <linux/perf_event.h>
|
||||
|
||||
#include <asm/cpu_mcf.h>
|
||||
#include <asm/ctl_reg.h>
|
||||
#include <asm/pai.h>
|
||||
#include <asm/debug.h>
|
||||
|
|
|
|||
Loading…
Reference in a new issue