v4.19.13 snapshot.
diff --git a/arch/x86/kernel/cpu/proc.c b/arch/x86/kernel/cpu/proc.c
new file mode 100644
index 0000000..2c8522a
--- /dev/null
+++ b/arch/x86/kernel/cpu/proc.c
@@ -0,0 +1,167 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/smp.h>
+#include <linux/timex.h>
+#include <linux/string.h>
+#include <linux/seq_file.h>
+#include <linux/cpufreq.h>
+
+#include "cpu.h"
+
+/*
+ * Get CPU information for use by the procfs.
+ */
+static void show_cpuinfo_core(struct seq_file *m, struct cpuinfo_x86 *c,
+ unsigned int cpu)
+{
+#ifdef CONFIG_SMP
+ seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
+ seq_printf(m, "siblings\t: %d\n",
+ cpumask_weight(topology_core_cpumask(cpu)));
+ seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
+ seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
+ seq_printf(m, "apicid\t\t: %d\n", c->apicid);
+ seq_printf(m, "initial apicid\t: %d\n", c->initial_apicid);
+#endif
+}
+
+#ifdef CONFIG_X86_32
+static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
+{
+ seq_printf(m,
+ "fdiv_bug\t: %s\n"
+ "f00f_bug\t: %s\n"
+ "coma_bug\t: %s\n"
+ "fpu\t\t: %s\n"
+ "fpu_exception\t: %s\n"
+ "cpuid level\t: %d\n"
+ "wp\t\t: yes\n",
+ static_cpu_has_bug(X86_BUG_FDIV) ? "yes" : "no",
+ static_cpu_has_bug(X86_BUG_F00F) ? "yes" : "no",
+ static_cpu_has_bug(X86_BUG_COMA) ? "yes" : "no",
+ static_cpu_has(X86_FEATURE_FPU) ? "yes" : "no",
+ static_cpu_has(X86_FEATURE_FPU) ? "yes" : "no",
+ c->cpuid_level);
+}
+#else
+static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
+{
+ seq_printf(m,
+ "fpu\t\t: yes\n"
+ "fpu_exception\t: yes\n"
+ "cpuid level\t: %d\n"
+ "wp\t\t: yes\n",
+ c->cpuid_level);
+}
+#endif
+
+static int show_cpuinfo(struct seq_file *m, void *v)
+{
+ struct cpuinfo_x86 *c = v;
+ unsigned int cpu;
+ int i;
+
+ cpu = c->cpu_index;
+ seq_printf(m, "processor\t: %u\n"
+ "vendor_id\t: %s\n"
+ "cpu family\t: %d\n"
+ "model\t\t: %u\n"
+ "model name\t: %s\n",
+ cpu,
+ c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
+ c->x86,
+ c->x86_model,
+ c->x86_model_id[0] ? c->x86_model_id : "unknown");
+
+ if (c->x86_stepping || c->cpuid_level >= 0)
+ seq_printf(m, "stepping\t: %d\n", c->x86_stepping);
+ else
+ seq_puts(m, "stepping\t: unknown\n");
+ if (c->microcode)
+ seq_printf(m, "microcode\t: 0x%x\n", c->microcode);
+
+ if (cpu_has(c, X86_FEATURE_TSC)) {
+ unsigned int freq = aperfmperf_get_khz(cpu);
+
+ if (!freq)
+ freq = cpufreq_quick_get(cpu);
+ if (!freq)
+ freq = cpu_khz;
+ seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
+ freq / 1000, (freq % 1000));
+ }
+
+ /* Cache size */
+ if (c->x86_cache_size)
+ seq_printf(m, "cache size\t: %u KB\n", c->x86_cache_size);
+
+ show_cpuinfo_core(m, c, cpu);
+ show_cpuinfo_misc(m, c);
+
+ seq_puts(m, "flags\t\t:");
+ for (i = 0; i < 32*NCAPINTS; i++)
+ if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
+ seq_printf(m, " %s", x86_cap_flags[i]);
+
+ seq_puts(m, "\nbugs\t\t:");
+ for (i = 0; i < 32*NBUGINTS; i++) {
+ unsigned int bug_bit = 32*NCAPINTS + i;
+
+ if (cpu_has_bug(c, bug_bit) && x86_bug_flags[i])
+ seq_printf(m, " %s", x86_bug_flags[i]);
+ }
+
+ seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
+ c->loops_per_jiffy/(500000/HZ),
+ (c->loops_per_jiffy/(5000/HZ)) % 100);
+
+#ifdef CONFIG_X86_64
+ if (c->x86_tlbsize > 0)
+ seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
+#endif
+ seq_printf(m, "clflush size\t: %u\n", c->x86_clflush_size);
+ seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
+ seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
+ c->x86_phys_bits, c->x86_virt_bits);
+
+ seq_puts(m, "power management:");
+ for (i = 0; i < 32; i++) {
+ if (c->x86_power & (1 << i)) {
+ if (i < ARRAY_SIZE(x86_power_flags) &&
+ x86_power_flags[i])
+ seq_printf(m, "%s%s",
+ x86_power_flags[i][0] ? " " : "",
+ x86_power_flags[i]);
+ else
+ seq_printf(m, " [%d]", i);
+ }
+ }
+
+ seq_puts(m, "\n\n");
+
+ return 0;
+}
+
+static void *c_start(struct seq_file *m, loff_t *pos)
+{
+ *pos = cpumask_next(*pos - 1, cpu_online_mask);
+ if ((*pos) < nr_cpu_ids)
+ return &cpu_data(*pos);
+ return NULL;
+}
+
+static void *c_next(struct seq_file *m, void *v, loff_t *pos)
+{
+ (*pos)++;
+ return c_start(m, pos);
+}
+
+static void c_stop(struct seq_file *m, void *v)
+{
+}
+
+const struct seq_operations cpuinfo_op = {
+ .start = c_start,
+ .next = c_next,
+ .stop = c_stop,
+ .show = show_cpuinfo,
+};