forked from Minki/linux
be6e3f9cd6
This patch makes the hwcap bit for the high gprs feature to be visible in /proc/cpuinfo. Signed-off-by: Andreas Krebbel <Andreas.Krebbel@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
98 lines
2.1 KiB
C
98 lines
2.1 KiB
C
/*
|
|
* arch/s390/kernel/processor.c
|
|
*
|
|
* Copyright IBM Corp. 2008
|
|
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
|
|
*/
|
|
|
|
#define KMSG_COMPONENT "cpu"
|
|
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/smp.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/delay.h>
|
|
|
|
#include <asm/elf.h>
|
|
#include <asm/lowcore.h>
|
|
#include <asm/param.h>
|
|
|
|
void __cpuinit print_cpu_info(void)
|
|
{
|
|
pr_info("Processor %d started, address %d, identification %06X\n",
|
|
S390_lowcore.cpu_nr, S390_lowcore.cpu_addr,
|
|
S390_lowcore.cpu_id.ident);
|
|
}
|
|
|
|
/*
|
|
* show_cpuinfo - Get information on one CPU for use by procfs.
|
|
*/
|
|
|
|
static int show_cpuinfo(struct seq_file *m, void *v)
|
|
{
|
|
static const char *hwcap_str[10] = {
|
|
"esan3", "zarch", "stfle", "msa", "ldisp", "eimm", "dfp",
|
|
"edat", "etf3eh", "highgprs"
|
|
};
|
|
struct _lowcore *lc;
|
|
unsigned long n = (unsigned long) v - 1;
|
|
int i;
|
|
|
|
s390_adjust_jiffies();
|
|
preempt_disable();
|
|
if (!n) {
|
|
seq_printf(m, "vendor_id : IBM/S390\n"
|
|
"# processors : %i\n"
|
|
"bogomips per cpu: %lu.%02lu\n",
|
|
num_online_cpus(), loops_per_jiffy/(500000/HZ),
|
|
(loops_per_jiffy/(5000/HZ))%100);
|
|
seq_puts(m, "features\t: ");
|
|
for (i = 0; i < 10; i++)
|
|
if (hwcap_str[i] && (elf_hwcap & (1UL << i)))
|
|
seq_printf(m, "%s ", hwcap_str[i]);
|
|
seq_puts(m, "\n");
|
|
}
|
|
|
|
if (cpu_online(n)) {
|
|
#ifdef CONFIG_SMP
|
|
lc = (smp_processor_id() == n) ?
|
|
&S390_lowcore : lowcore_ptr[n];
|
|
#else
|
|
lc = &S390_lowcore;
|
|
#endif
|
|
seq_printf(m, "processor %li: "
|
|
"version = %02X, "
|
|
"identification = %06X, "
|
|
"machine = %04X\n",
|
|
n, lc->cpu_id.version,
|
|
lc->cpu_id.ident,
|
|
lc->cpu_id.machine);
|
|
}
|
|
preempt_enable();
|
|
return 0;
|
|
}
|
|
|
|
static void *c_start(struct seq_file *m, loff_t *pos)
|
|
{
|
|
return *pos < NR_CPUS ? (void *)((unsigned long) *pos + 1) : 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,
|
|
};
|
|
|