Messages in this thread Patch in this message | | | From | Chao Liu <> | Subject | [PATCH] add cpu frequency to cpuinfo in arm64 | Date | Wed, 26 Jan 2022 09:18:53 +0000 |
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There is cpu frequency in /proc/cpuinfo in x86 but not in arm64
Signed-off-by: Chao Liu <liuchao173@huawei.com> --- arch/arm64/kernel/cpuinfo.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/arch/arm64/kernel/cpuinfo.c b/arch/arm64/kernel/cpuinfo.c index 591c18a889a5..a5af899bebc9 100644 --- a/arch/arm64/kernel/cpuinfo.c +++ b/arch/arm64/kernel/cpuinfo.c @@ -24,6 +24,7 @@ #include <linux/sched.h> #include <linux/smp.h> #include <linux/delay.h> +#include <linux/cpufreq.h> /* * In case the boot CPU is hotpluggable, we record its initial state and @@ -144,6 +145,7 @@ static int c_show(struct seq_file *m, void *v) for_each_online_cpu(i) { struct cpuinfo_arm64 *cpuinfo = &per_cpu(cpu_data, i); u32 midr = cpuinfo->reg_midr; + unsigned int freq = cpufreq_quick_get(i); /* * glibc reads /proc/cpuinfo to determine the number of @@ -159,6 +161,11 @@ static int c_show(struct seq_file *m, void *v) loops_per_jiffy / (500000UL/HZ), loops_per_jiffy / (5000UL/HZ) % 100); + + if (cpu_freq) + seq_printf(m, "cpu MHz\t\t: %u.%03u\n", + freq / 1000, (freq % 1000)); + /* * Dump out the common processor features in a single line. * Userspace should read the hwcaps with getauxval(AT_HWCAP) -- 2.23.0
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