mirror of
https://github.com/torvalds/linux.git
synced 2024-11-15 08:31:55 +00:00
7f16d7e787
This patch exposes the SIE capability (aka virtualization support) via /proc/cpuinfo -> "features" as "sie". As we don't want to expose this hwcap via elf, let's add a second, "internal"/non-elf capability list. The content is simply concatenated to the existing features when printing /proc/cpuinfo. We also add the defines to elf.h to keep the hwcap stuff at a common place. Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
122 lines
2.7 KiB
C
122 lines
2.7 KiB
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/seq_file.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/cpu.h>
|
|
#include <asm/diag.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);
|
|
|
|
void notrace cpu_relax(void)
|
|
{
|
|
if (!smp_cpu_mtid && MACHINE_HAS_DIAG44) {
|
|
diag_stat_inc(DIAG_STAT_X044);
|
|
asm volatile("diag 0,0,0x44");
|
|
}
|
|
barrier();
|
|
}
|
|
EXPORT_SYMBOL(cpu_relax);
|
|
|
|
/*
|
|
* cpu_init - initializes state that is per-CPU.
|
|
*/
|
|
void cpu_init(void)
|
|
{
|
|
struct cpuid *id = this_cpu_ptr(&cpu_id);
|
|
|
|
get_cpu_id(id);
|
|
atomic_inc(&init_mm.mm_count);
|
|
current->active_mm = &init_mm;
|
|
BUG_ON(current->mm);
|
|
enter_lazy_tlb(&init_mm, current);
|
|
}
|
|
|
|
/*
|
|
* cpu_have_feature - Test CPU features on module initialization
|
|
*/
|
|
int cpu_have_feature(unsigned int num)
|
|
{
|
|
return elf_hwcap & (1UL << num);
|
|
}
|
|
EXPORT_SYMBOL(cpu_have_feature);
|
|
|
|
/*
|
|
* 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[] = {
|
|
"esan3", "zarch", "stfle", "msa", "ldisp", "eimm", "dfp",
|
|
"edat", "etf3eh", "highgprs", "te", "vx"
|
|
};
|
|
static const char * const int_hwcap_str[] = {
|
|
"sie"
|
|
};
|
|
unsigned long n = (unsigned long) v - 1;
|
|
int i;
|
|
|
|
if (!n) {
|
|
s390_adjust_jiffies();
|
|
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 < ARRAY_SIZE(hwcap_str); i++)
|
|
if (hwcap_str[i] && (elf_hwcap & (1UL << i)))
|
|
seq_printf(m, "%s ", hwcap_str[i]);
|
|
for (i = 0; i < ARRAY_SIZE(int_hwcap_str); i++)
|
|
if (int_hwcap_str[i] && (int_hwcap & (1UL << i)))
|
|
seq_printf(m, "%s ", int_hwcap_str[i]);
|
|
seq_puts(m, "\n");
|
|
show_cacheinfo(m);
|
|
}
|
|
get_online_cpus();
|
|
if (cpu_online(n)) {
|
|
struct cpuid *id = &per_cpu(cpu_id, n);
|
|
seq_printf(m, "processor %li: "
|
|
"version = %02X, "
|
|
"identification = %06X, "
|
|
"machine = %04X\n",
|
|
n, id->version, id->ident, id->machine);
|
|
}
|
|
put_online_cpus();
|
|
return 0;
|
|
}
|
|
|
|
static void *c_start(struct seq_file *m, loff_t *pos)
|
|
{
|
|
return *pos < nr_cpu_ids ? (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,
|
|
};
|
|
|