diff options
| -rw-r--r-- | arch/s390/include/asm/processor.h | 17 | ||||
| -rw-r--r-- | arch/s390/kernel/cache.c | 7 | ||||
| -rw-r--r-- | arch/s390/kernel/processor.c | 55 | ||||
| -rw-r--r-- | arch/s390/kernel/setup.c | 1 | ||||
| -rw-r--r-- | drivers/s390/char/sclp_config.c | 2 |
5 files changed, 69 insertions, 13 deletions
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h index 9d4d311d7e52..09529202ea77 100644 --- a/arch/s390/include/asm/processor.h +++ b/arch/s390/include/asm/processor.h @@ -77,7 +77,10 @@ static inline void get_cpu_id(struct cpuid *ptr) asm volatile("stidp %0" : "=Q" (*ptr)); } -extern void s390_adjust_jiffies(void); +void s390_adjust_jiffies(void); +void s390_update_cpu_mhz(void); +void cpu_detect_mhz_feature(void); + extern const struct seq_operations cpuinfo_op; extern int sysctl_ieee_emulation_warnings; extern void execve_tail(void); @@ -233,6 +236,18 @@ void cpu_relax(void); #define cpu_relax_lowlatency() barrier() +#define ECAG_CACHE_ATTRIBUTE 0 +#define ECAG_CPU_ATTRIBUTE 1 + +static inline unsigned long __ecag(unsigned int asi, unsigned char parm) +{ + unsigned long val; + + asm volatile(".insn rsy,0xeb000000004c,%0,0,0(%1)" /* ecag */ + : "=d" (val) : "a" (asi << 8 | parm)); + return val; +} + static inline void psw_set_key(unsigned int key) { asm volatile("spka 0(%0)" : : "d" (key)); diff --git a/arch/s390/kernel/cache.c b/arch/s390/kernel/cache.c index 77a84bd78be2..c8a83276a4dc 100644 --- a/arch/s390/kernel/cache.c +++ b/arch/s390/kernel/cache.c @@ -99,12 +99,7 @@ static inline enum cache_type get_cache_type(struct cache_info *ci, int level) static inline unsigned long ecag(int ai, int li, int ti) { - unsigned long cmd, val; - - cmd = ai << 4 | li << 1 | ti; - asm volatile(".insn rsy,0xeb000000004c,%0,0,0(%1)" /* ecag */ - : "=d" (val) : "a" (cmd)); - return val; + return __ecag(ECAG_CACHE_ATTRIBUTE, ai << 4 | li << 1 | ti); } static void ci_leaf_init(struct cacheinfo *this_leaf, int private, diff --git a/arch/s390/kernel/processor.c b/arch/s390/kernel/processor.c index 4f7a96d719d0..06ca71b7ec0e 100644 --- a/arch/s390/kernel/processor.c +++ b/arch/s390/kernel/processor.c @@ -13,12 +13,45 @@ #include <linux/delay.h> #include <linux/cpu.h> #include <asm/diag.h> +#include <asm/facility.h> #include <asm/elf.h> #include <asm/lowcore.h> #include <asm/param.h> #include <asm/smp.h> -static DEFINE_PER_CPU(struct cpuid, cpu_id); +struct cpu_info { + unsigned int cpu_mhz_dynamic; + unsigned int cpu_mhz_static; + struct cpuid cpu_id; +}; + +static DEFINE_PER_CPU(struct cpu_info, cpu_info); + +static bool machine_has_cpu_mhz; + +void __init cpu_detect_mhz_feature(void) +{ + if (test_facility(34) && __ecag(ECAG_CPU_ATTRIBUTE, 0) != -1UL) + machine_has_cpu_mhz = 1; +} + +static void update_cpu_mhz(void *arg) +{ + unsigned long mhz; + struct cpu_info *c; + + mhz = __ecag(ECAG_CPU_ATTRIBUTE, 0); + c = this_cpu_ptr(&cpu_info); + c->cpu_mhz_dynamic = mhz >> 32; + c->cpu_mhz_static = mhz & 0xffffffff; +} + +void s390_update_cpu_mhz(void) +{ + s390_adjust_jiffies(); + if (machine_has_cpu_mhz) + on_each_cpu(update_cpu_mhz, NULL, 0); +} void notrace cpu_relax(void) { @@ -35,9 +68,11 @@ EXPORT_SYMBOL(cpu_relax); */ void cpu_init(void) { - struct cpuid *id = this_cpu_ptr(&cpu_id); + struct cpuid *id = this_cpu_ptr(&cpu_info.cpu_id); get_cpu_id(id); + if (machine_has_cpu_mhz) + update_cpu_mhz(NULL); atomic_inc(&init_mm.mm_count); current->active_mm = &init_mm; BUG_ON(current->mm); @@ -64,7 +99,6 @@ static void show_cpu_summary(struct seq_file *m, void *v) }; int i, cpu; - s390_adjust_jiffies(); seq_printf(m, "vendor_id : IBM/S390\n" "# processors : %i\n" "bogomips per cpu: %lu.%02lu\n", @@ -80,7 +114,7 @@ static void show_cpu_summary(struct seq_file *m, void *v) seq_puts(m, "\n"); show_cacheinfo(m); for_each_online_cpu(cpu) { - struct cpuid *id = &per_cpu(cpu_id, cpu); + struct cpuid *id = &per_cpu(cpu_info.cpu_id, cpu); seq_printf(m, "processor %d: " "version = %02X, " @@ -90,6 +124,14 @@ static void show_cpu_summary(struct seq_file *m, void *v) } } +static void show_cpu_mhz(struct seq_file *m, unsigned long n) +{ + struct cpu_info *c = per_cpu_ptr(&cpu_info, n); + + seq_printf(m, "cpu MHz dynamic : %d\n", c->cpu_mhz_dynamic); + seq_printf(m, "cpu MHz static : %d\n", c->cpu_mhz_static); +} + /* * show_cpuinfo - Get information on one CPU for use by procfs. */ @@ -99,6 +141,10 @@ static int show_cpuinfo(struct seq_file *m, void *v) if (!n) show_cpu_summary(m, v); + if (!machine_has_cpu_mhz) + return 0; + seq_printf(m, "\ncpu : %ld\n", n); + show_cpu_mhz(m, n); return 0; } @@ -132,4 +178,3 @@ const struct seq_operations cpuinfo_op = { .stop = c_stop, .show = show_cpuinfo, }; - diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index f31939147ccd..d4e0742b197b 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -901,6 +901,7 @@ void __init setup_arch(char **cmdline_p) setup_vmcoreinfo(); setup_lowcore(); smp_fill_possible_mask(); + cpu_detect_mhz_feature(); cpu_init(); numa_setup(); diff --git a/drivers/s390/char/sclp_config.c b/drivers/s390/char/sclp_config.c index 2ced50ccca63..1406fb688a26 100644 --- a/drivers/s390/char/sclp_config.c +++ b/drivers/s390/char/sclp_config.c @@ -47,7 +47,7 @@ static void sclp_cpu_capability_notify(struct work_struct *work) int cpu; struct device *dev; - s390_adjust_jiffies(); + s390_update_cpu_mhz(); pr_info("CPU capability may have changed\n"); get_online_cpus(); for_each_online_cpu(cpu) { |