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748f0d7008
When a user tries to modify cpuidle or cpufreq properties on offline CPUs, the tool returns success (exit status 0) but also does not provide any warning message regarding offline cpus that may have been specified but left unchanged. In case of all or a few CPUs being offline, it can be difficult to keep track of which CPUs didn't get the new frequency or idle state set. Silent failures are difficult to keep track of when there are a huge number of CPUs on which the action is performed. This patch adds helper functions to find both online and offline CPUs and print them out accordingly. We use these helper functions in cpuidle-set and cpufreq-set to print an additional message if the user attempts to modify offline cpus. Reported-by: Pavithra R. Prakash <pavrampu@in.ibm.com> Signed-off-by: Brahadambal Srinivasan <latha@linux.vnet.ibm.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
187 lines
5.5 KiB
C
187 lines
5.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* (C) 2010,2011 Thomas Renninger <trenn@suse.de>, Novell Inc.
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*
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* Miscellaneous helpers which do not fit or are worth
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* to put into separate headers
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*/
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#ifndef __CPUPOWERUTILS_HELPERS__
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#define __CPUPOWERUTILS_HELPERS__
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#include <libintl.h>
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#include <locale.h>
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#include "helpers/bitmask.h"
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#include <cpupower.h>
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/* Internationalization ****************************/
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#ifdef NLS
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#define _(String) gettext(String)
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#ifndef gettext_noop
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#define gettext_noop(String) String
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#endif
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#define N_(String) gettext_noop(String)
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#else /* !NLS */
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#define _(String) String
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#define N_(String) String
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#endif
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/* Internationalization ****************************/
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extern int run_as_root;
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extern int base_cpu;
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extern struct bitmask *cpus_chosen;
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/* Global verbose (-d) stuff *********************************/
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/*
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* define DEBUG via global Makefile variable
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* Debug output is sent to stderr, do:
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* cpupower monitor 2>/tmp/debug
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* to split debug output away from normal output
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*/
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#ifdef DEBUG
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extern int be_verbose;
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#define dprint(fmt, ...) { \
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if (be_verbose) { \
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fprintf(stderr, "%s: " fmt, \
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__func__, ##__VA_ARGS__); \
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} \
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}
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#else
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static inline void dprint(const char *fmt, ...) { }
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#endif
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extern int be_verbose;
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/* Global verbose (-v) stuff *********************************/
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/* cpuid and cpuinfo helpers **************************/
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enum cpupower_cpu_vendor {X86_VENDOR_UNKNOWN = 0, X86_VENDOR_INTEL,
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X86_VENDOR_AMD, X86_VENDOR_HYGON, X86_VENDOR_MAX};
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#define CPUPOWER_CAP_INV_TSC 0x00000001
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#define CPUPOWER_CAP_APERF 0x00000002
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#define CPUPOWER_CAP_AMD_CBP 0x00000004
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#define CPUPOWER_CAP_PERF_BIAS 0x00000008
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#define CPUPOWER_CAP_HAS_TURBO_RATIO 0x00000010
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#define CPUPOWER_CAP_IS_SNB 0x00000020
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#define CPUPOWER_CAP_INTEL_IDA 0x00000040
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#define CPUPOWER_CAP_AMD_RDPRU 0x00000080
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#define CPUPOWER_AMD_CPBDIS 0x02000000
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#define MAX_HW_PSTATES 10
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struct cpupower_cpu_info {
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enum cpupower_cpu_vendor vendor;
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unsigned int family;
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unsigned int model;
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unsigned int stepping;
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/* CPU capabilities read out from cpuid */
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unsigned long long caps;
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};
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/* get_cpu_info
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*
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* Extract CPU vendor, family, model, stepping info from /proc/cpuinfo
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*
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* Returns 0 on success or a negative error code
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* Only used on x86, below global's struct values are zero/unknown on
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* other archs
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*/
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extern int get_cpu_info(struct cpupower_cpu_info *cpu_info);
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extern struct cpupower_cpu_info cpupower_cpu_info;
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/* cpuid and cpuinfo helpers **************************/
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/* X86 ONLY ****************************************/
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#if defined(__i386__) || defined(__x86_64__)
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#include <pci/pci.h>
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/* Read/Write msr ****************************/
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extern int read_msr(int cpu, unsigned int idx, unsigned long long *val);
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extern int write_msr(int cpu, unsigned int idx, unsigned long long val);
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extern int msr_intel_set_perf_bias(unsigned int cpu, unsigned int val);
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extern int msr_intel_get_perf_bias(unsigned int cpu);
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extern unsigned long long msr_intel_get_turbo_ratio(unsigned int cpu);
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/* Read/Write msr ****************************/
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/* PCI stuff ****************************/
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extern int amd_pci_get_num_boost_states(int *active, int *states);
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extern struct pci_dev *pci_acc_init(struct pci_access **pacc, int domain,
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int bus, int slot, int func, int vendor,
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int dev);
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extern struct pci_dev *pci_slot_func_init(struct pci_access **pacc,
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int slot, int func);
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/* PCI stuff ****************************/
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/* AMD HW pstate decoding **************************/
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extern int decode_pstates(unsigned int cpu, unsigned int cpu_family,
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int boost_states, unsigned long *pstates, int *no);
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/* AMD HW pstate decoding **************************/
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extern int cpufreq_has_boost_support(unsigned int cpu, int *support,
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int *active, int * states);
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/*
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* CPUID functions returning a single datum
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*/
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unsigned int cpuid_eax(unsigned int op);
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unsigned int cpuid_ebx(unsigned int op);
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unsigned int cpuid_ecx(unsigned int op);
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unsigned int cpuid_edx(unsigned int op);
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/* cpuid and cpuinfo helpers **************************/
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/* X86 ONLY ********************************************/
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#else
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static inline int decode_pstates(unsigned int cpu, unsigned int cpu_family,
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int boost_states, unsigned long *pstates,
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int *no)
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{ return -1; };
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static inline int read_msr(int cpu, unsigned int idx, unsigned long long *val)
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{ return -1; };
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static inline int write_msr(int cpu, unsigned int idx, unsigned long long val)
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{ return -1; };
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static inline int msr_intel_set_perf_bias(unsigned int cpu, unsigned int val)
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{ return -1; };
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static inline int msr_intel_get_perf_bias(unsigned int cpu)
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{ return -1; };
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static inline unsigned long long msr_intel_get_turbo_ratio(unsigned int cpu)
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{ return 0; };
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/* Read/Write msr ****************************/
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static inline int cpufreq_has_boost_support(unsigned int cpu, int *support,
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int *active, int * states)
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{ return -1; }
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/* cpuid and cpuinfo helpers **************************/
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static inline unsigned int cpuid_eax(unsigned int op) { return 0; };
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static inline unsigned int cpuid_ebx(unsigned int op) { return 0; };
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static inline unsigned int cpuid_ecx(unsigned int op) { return 0; };
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static inline unsigned int cpuid_edx(unsigned int op) { return 0; };
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#endif /* defined(__i386__) || defined(__x86_64__) */
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/*
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* CPU State related functions
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*/
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extern struct bitmask *online_cpus;
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extern struct bitmask *offline_cpus;
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void get_cpustate(void);
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void print_online_cpus(void);
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void print_offline_cpus(void);
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#endif /* __CPUPOWERUTILS_HELPERS__ */
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