mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-09-04 20:19:47 +08:00
e76b8c1d7a
Convert all strcpy() usages to strscpy() where the conversion means just replacing strcpy() with strscpy(). strcpy() is deprecated since it performs no bounds checking on the destination buffer. Reviewed-by: Mikhail Zaslonko <zaslonko@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
388 lines
8.9 KiB
C
388 lines
8.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* 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/stop_machine.h>
|
|
#include <linux/cpufeature.h>
|
|
#include <linux/bitops.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/random.h>
|
|
#include <linux/sched/mm.h>
|
|
#include <linux/init.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/mm_types.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/cpu.h>
|
|
#include <linux/smp.h>
|
|
#include <asm/text-patching.h>
|
|
#include <asm/machine.h>
|
|
#include <asm/diag.h>
|
|
#include <asm/facility.h>
|
|
#include <asm/elf.h>
|
|
#include <asm/lowcore.h>
|
|
#include <asm/param.h>
|
|
#include <asm/sclp.h>
|
|
#include <asm/smp.h>
|
|
|
|
unsigned long __read_mostly elf_hwcap;
|
|
char elf_platform[ELF_PLATFORM_SIZE];
|
|
|
|
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 DEFINE_PER_CPU(int, cpu_relax_retry);
|
|
|
|
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 = true;
|
|
}
|
|
|
|
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 stop_machine_yield(const struct cpumask *cpumask)
|
|
{
|
|
int cpu, this_cpu;
|
|
|
|
this_cpu = smp_processor_id();
|
|
if (__this_cpu_inc_return(cpu_relax_retry) >= spin_retry) {
|
|
__this_cpu_write(cpu_relax_retry, 0);
|
|
cpu = cpumask_next_wrap(this_cpu, cpumask);
|
|
if (cpu >= nr_cpu_ids)
|
|
return;
|
|
if (arch_vcpu_is_preempted(cpu))
|
|
smp_yield_cpu(cpu);
|
|
}
|
|
}
|
|
|
|
static void do_sync_core(void *info)
|
|
{
|
|
sync_core();
|
|
}
|
|
|
|
void text_poke_sync(void)
|
|
{
|
|
on_each_cpu(do_sync_core, NULL, 1);
|
|
}
|
|
|
|
void text_poke_sync_lock(void)
|
|
{
|
|
cpus_read_lock();
|
|
text_poke_sync();
|
|
cpus_read_unlock();
|
|
}
|
|
|
|
/*
|
|
* cpu_init - initializes state that is per-CPU.
|
|
*/
|
|
void cpu_init(void)
|
|
{
|
|
struct cpuid *id = this_cpu_ptr(&cpu_info.cpu_id);
|
|
|
|
get_cpu_id(id);
|
|
if (machine_has_cpu_mhz)
|
|
update_cpu_mhz(NULL);
|
|
mmgrab(&init_mm);
|
|
current->active_mm = &init_mm;
|
|
BUG_ON(current->mm);
|
|
enter_lazy_tlb(&init_mm, current);
|
|
}
|
|
|
|
static void show_facilities(struct seq_file *m)
|
|
{
|
|
unsigned int bit;
|
|
|
|
seq_puts(m, "facilities :");
|
|
for_each_set_bit_inv(bit, (long *)&stfle_fac_list, MAX_FACILITY_BIT)
|
|
seq_printf(m, " %d", bit);
|
|
seq_putc(m, '\n');
|
|
}
|
|
|
|
static void show_cpu_summary(struct seq_file *m, void *v)
|
|
{
|
|
static const char *hwcap_str[] = {
|
|
[HWCAP_NR_ESAN3] = "esan3",
|
|
[HWCAP_NR_ZARCH] = "zarch",
|
|
[HWCAP_NR_STFLE] = "stfle",
|
|
[HWCAP_NR_MSA] = "msa",
|
|
[HWCAP_NR_LDISP] = "ldisp",
|
|
[HWCAP_NR_EIMM] = "eimm",
|
|
[HWCAP_NR_DFP] = "dfp",
|
|
[HWCAP_NR_HPAGE] = "edat",
|
|
[HWCAP_NR_ETF3EH] = "etf3eh",
|
|
[HWCAP_NR_HIGH_GPRS] = "highgprs",
|
|
[HWCAP_NR_TE] = "te",
|
|
[HWCAP_NR_VXRS] = "vx",
|
|
[HWCAP_NR_VXRS_BCD] = "vxd",
|
|
[HWCAP_NR_VXRS_EXT] = "vxe",
|
|
[HWCAP_NR_GS] = "gs",
|
|
[HWCAP_NR_VXRS_EXT2] = "vxe2",
|
|
[HWCAP_NR_VXRS_PDE] = "vxp",
|
|
[HWCAP_NR_SORT] = "sort",
|
|
[HWCAP_NR_DFLT] = "dflt",
|
|
[HWCAP_NR_VXRS_PDE2] = "vxp2",
|
|
[HWCAP_NR_NNPA] = "nnpa",
|
|
[HWCAP_NR_PCI_MIO] = "pcimio",
|
|
[HWCAP_NR_SIE] = "sie",
|
|
};
|
|
int i, cpu;
|
|
|
|
BUILD_BUG_ON(ARRAY_SIZE(hwcap_str) != HWCAP_NR_MAX);
|
|
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_printf(m, "max thread id : %d\n", smp_cpu_mtid);
|
|
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]);
|
|
seq_puts(m, "\n");
|
|
show_facilities(m);
|
|
show_cacheinfo(m);
|
|
for_each_online_cpu(cpu) {
|
|
struct cpuid *id = &per_cpu(cpu_info.cpu_id, cpu);
|
|
|
|
seq_printf(m, "processor %d: "
|
|
"version = %02X, "
|
|
"identification = %06X, "
|
|
"machine = %04X\n",
|
|
cpu, id->version, id->ident, id->machine);
|
|
}
|
|
}
|
|
|
|
static int __init setup_hwcaps(void)
|
|
{
|
|
/* instructions named N3, "backported" to esa-mode */
|
|
elf_hwcap |= HWCAP_ESAN3;
|
|
|
|
/* z/Architecture mode active */
|
|
elf_hwcap |= HWCAP_ZARCH;
|
|
|
|
/* store-facility-list-extended */
|
|
if (test_facility(7))
|
|
elf_hwcap |= HWCAP_STFLE;
|
|
|
|
/* message-security assist */
|
|
if (test_facility(17))
|
|
elf_hwcap |= HWCAP_MSA;
|
|
|
|
/* long-displacement */
|
|
if (test_facility(19))
|
|
elf_hwcap |= HWCAP_LDISP;
|
|
|
|
/* extended-immediate */
|
|
elf_hwcap |= HWCAP_EIMM;
|
|
|
|
/* extended-translation facility 3 enhancement */
|
|
if (test_facility(22) && test_facility(30))
|
|
elf_hwcap |= HWCAP_ETF3EH;
|
|
|
|
/* decimal floating point & perform floating point operation */
|
|
if (test_facility(42) && test_facility(44))
|
|
elf_hwcap |= HWCAP_DFP;
|
|
|
|
/* huge page support */
|
|
if (cpu_has_edat1())
|
|
elf_hwcap |= HWCAP_HPAGE;
|
|
|
|
/* 64-bit register support for 31-bit processes */
|
|
elf_hwcap |= HWCAP_HIGH_GPRS;
|
|
|
|
/* transactional execution */
|
|
if (machine_has_tx())
|
|
elf_hwcap |= HWCAP_TE;
|
|
|
|
/* vector */
|
|
if (test_facility(129)) {
|
|
elf_hwcap |= HWCAP_VXRS;
|
|
if (test_facility(134))
|
|
elf_hwcap |= HWCAP_VXRS_BCD;
|
|
if (test_facility(135))
|
|
elf_hwcap |= HWCAP_VXRS_EXT;
|
|
if (test_facility(148))
|
|
elf_hwcap |= HWCAP_VXRS_EXT2;
|
|
if (test_facility(152))
|
|
elf_hwcap |= HWCAP_VXRS_PDE;
|
|
if (test_facility(192))
|
|
elf_hwcap |= HWCAP_VXRS_PDE2;
|
|
}
|
|
|
|
if (test_facility(150))
|
|
elf_hwcap |= HWCAP_SORT;
|
|
|
|
if (test_facility(151))
|
|
elf_hwcap |= HWCAP_DFLT;
|
|
|
|
if (test_facility(165))
|
|
elf_hwcap |= HWCAP_NNPA;
|
|
|
|
/* guarded storage */
|
|
if (cpu_has_gs())
|
|
elf_hwcap |= HWCAP_GS;
|
|
|
|
if (test_machine_feature(MFEATURE_PCI_MIO))
|
|
elf_hwcap |= HWCAP_PCI_MIO;
|
|
|
|
/* virtualization support */
|
|
if (sclp.has_sief2)
|
|
elf_hwcap |= HWCAP_SIE;
|
|
|
|
return 0;
|
|
}
|
|
arch_initcall(setup_hwcaps);
|
|
|
|
static int __init setup_elf_platform(void)
|
|
{
|
|
struct cpuid cpu_id;
|
|
|
|
get_cpu_id(&cpu_id);
|
|
add_device_randomness(&cpu_id, sizeof(cpu_id));
|
|
switch (cpu_id.machine) {
|
|
default: /* Use "z10" as default. */
|
|
strscpy(elf_platform, "z10");
|
|
break;
|
|
case 0x2817:
|
|
case 0x2818:
|
|
strscpy(elf_platform, "z196");
|
|
break;
|
|
case 0x2827:
|
|
case 0x2828:
|
|
strscpy(elf_platform, "zEC12");
|
|
break;
|
|
case 0x2964:
|
|
case 0x2965:
|
|
strscpy(elf_platform, "z13");
|
|
break;
|
|
case 0x3906:
|
|
case 0x3907:
|
|
strscpy(elf_platform, "z14");
|
|
break;
|
|
case 0x8561:
|
|
case 0x8562:
|
|
strscpy(elf_platform, "z15");
|
|
break;
|
|
case 0x3931:
|
|
case 0x3932:
|
|
strscpy(elf_platform, "z16");
|
|
break;
|
|
case 0x9175:
|
|
case 0x9176:
|
|
strscpy(elf_platform, "z17");
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
arch_initcall(setup_elf_platform);
|
|
|
|
static void show_cpu_topology(struct seq_file *m, unsigned long n)
|
|
{
|
|
#ifdef CONFIG_SCHED_TOPOLOGY
|
|
seq_printf(m, "physical id : %d\n", topology_physical_package_id(n));
|
|
seq_printf(m, "core id : %d\n", topology_core_id(n));
|
|
seq_printf(m, "book id : %d\n", topology_book_id(n));
|
|
seq_printf(m, "drawer id : %d\n", topology_drawer_id(n));
|
|
seq_printf(m, "dedicated : %d\n", topology_cpu_dedicated(n));
|
|
seq_printf(m, "address : %d\n", smp_cpu_get_cpu_address(n));
|
|
seq_printf(m, "siblings : %d\n", cpumask_weight(topology_core_cpumask(n)));
|
|
seq_printf(m, "cpu cores : %d\n", topology_booted_cores(n));
|
|
#endif /* CONFIG_SCHED_TOPOLOGY */
|
|
}
|
|
|
|
static void show_cpu_ids(struct seq_file *m, unsigned long n)
|
|
{
|
|
struct cpuid *id = &per_cpu(cpu_info.cpu_id, n);
|
|
|
|
seq_printf(m, "version : %02X\n", id->version);
|
|
seq_printf(m, "identification : %06X\n", id->ident);
|
|
seq_printf(m, "machine : %04X\n", id->machine);
|
|
}
|
|
|
|
static void show_cpu_mhz(struct seq_file *m, unsigned long n)
|
|
{
|
|
struct cpu_info *c = per_cpu_ptr(&cpu_info, n);
|
|
|
|
if (!machine_has_cpu_mhz)
|
|
return;
|
|
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.
|
|
*/
|
|
static int show_cpuinfo(struct seq_file *m, void *v)
|
|
{
|
|
unsigned long n = (unsigned long) v - 1;
|
|
unsigned long first = cpumask_first(cpu_online_mask);
|
|
|
|
if (n == first)
|
|
show_cpu_summary(m, v);
|
|
seq_printf(m, "\ncpu number : %ld\n", n);
|
|
show_cpu_topology(m, n);
|
|
show_cpu_ids(m, n);
|
|
show_cpu_mhz(m, n);
|
|
return 0;
|
|
}
|
|
|
|
static inline void *c_update(loff_t *pos)
|
|
{
|
|
if (*pos)
|
|
*pos = cpumask_next(*pos - 1, cpu_online_mask);
|
|
else
|
|
*pos = cpumask_first(cpu_online_mask);
|
|
return *pos < nr_cpu_ids ? (void *)*pos + 1 : NULL;
|
|
}
|
|
|
|
static void *c_start(struct seq_file *m, loff_t *pos)
|
|
{
|
|
cpus_read_lock();
|
|
return c_update(pos);
|
|
}
|
|
|
|
static void *c_next(struct seq_file *m, void *v, loff_t *pos)
|
|
{
|
|
++*pos;
|
|
return c_update(pos);
|
|
}
|
|
|
|
static void c_stop(struct seq_file *m, void *v)
|
|
{
|
|
cpus_read_unlock();
|
|
}
|
|
|
|
const struct seq_operations cpuinfo_op = {
|
|
.start = c_start,
|
|
.next = c_next,
|
|
.stop = c_stop,
|
|
.show = show_cpuinfo,
|
|
};
|