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-rw-r--r--arch/s390/kernel/Makefile4
-rw-r--r--arch/s390/kernel/base.S3
-rw-r--r--arch/s390/kernel/cache.c390
-rw-r--r--arch/s390/kernel/compat_signal.c2
-rw-r--r--arch/s390/kernel/dis.c9
-rw-r--r--arch/s390/kernel/early.c20
-rw-r--r--arch/s390/kernel/entry.h4
-rw-r--r--arch/s390/kernel/ftrace.c108
-rw-r--r--arch/s390/kernel/head.S4
-rw-r--r--arch/s390/kernel/ipl.c11
-rw-r--r--arch/s390/kernel/jump_label.c63
-rw-r--r--arch/s390/kernel/kprobes.c3
-rw-r--r--arch/s390/kernel/machine_kexec.c19
-rw-r--r--arch/s390/kernel/mcount.S2
-rw-r--r--arch/s390/kernel/module.c2
-rw-r--r--arch/s390/kernel/process.c18
-rw-r--r--arch/s390/kernel/processor.c10
-rw-r--r--arch/s390/kernel/sclp.S3
-rw-r--r--arch/s390/kernel/setup.c4
-rw-r--r--arch/s390/kernel/signal.c2
-rw-r--r--arch/s390/kernel/smp.c315
-rw-r--r--arch/s390/kernel/sysinfo.c37
-rw-r--r--arch/s390/kernel/topology.c181
-rw-r--r--arch/s390/kernel/vdso64/clock_gettime.S6
-rw-r--r--arch/s390/kernel/vtime.c58
25 files changed, 707 insertions, 571 deletions
diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile
index 204c43a4c245..31fab2676fe9 100644
--- a/arch/s390/kernel/Makefile
+++ b/arch/s390/kernel/Makefile
@@ -4,8 +4,8 @@
ifdef CONFIG_FUNCTION_TRACER
# Don't trace early setup code and tracing code
-CFLAGS_REMOVE_early.o = -pg
-CFLAGS_REMOVE_ftrace.o = -pg
+CFLAGS_REMOVE_early.o = $(CC_FLAGS_FTRACE)
+CFLAGS_REMOVE_ftrace.o = $(CC_FLAGS_FTRACE)
endif
#
diff --git a/arch/s390/kernel/base.S b/arch/s390/kernel/base.S
index 797a823a2275..f74a53d339b0 100644
--- a/arch/s390/kernel/base.S
+++ b/arch/s390/kernel/base.S
@@ -97,7 +97,8 @@ ENTRY(diag308_reset)
lg %r4,0(%r4) # Save PSW
sturg %r4,%r3 # Use sturg, because of large pages
lghi %r1,1
- diag %r1,%r1,0x308
+ lghi %r0,0
+ diag %r0,%r1,0x308
.Lrestart_part2:
lhi %r0,0 # Load r0 with zero
lhi %r1,2 # Use mode 2 = ESAME (dump)
diff --git a/arch/s390/kernel/cache.c b/arch/s390/kernel/cache.c
index c0b03c28d157..0969d113b3d6 100644
--- a/arch/s390/kernel/cache.c
+++ b/arch/s390/kernel/cache.c
@@ -5,37 +5,11 @@
* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
*/
-#include <linux/notifier.h>
#include <linux/seq_file.h>
-#include <linux/init.h>
-#include <linux/list.h>
-#include <linux/slab.h>
#include <linux/cpu.h>
+#include <linux/cacheinfo.h>
#include <asm/facility.h>
-struct cache {
- unsigned long size;
- unsigned int line_size;
- unsigned int associativity;
- unsigned int nr_sets;
- unsigned int level : 3;
- unsigned int type : 2;
- unsigned int private : 1;
- struct list_head list;
-};
-
-struct cache_dir {
- struct kobject *kobj;
- struct cache_index_dir *index;
-};
-
-struct cache_index_dir {
- struct kobject kobj;
- int cpu;
- struct cache *cache;
- struct cache_index_dir *next;
-};
-
enum {
CACHE_SCOPE_NOTEXISTS,
CACHE_SCOPE_PRIVATE,
@@ -44,10 +18,10 @@ enum {
};
enum {
- CACHE_TYPE_SEPARATE,
- CACHE_TYPE_DATA,
- CACHE_TYPE_INSTRUCTION,
- CACHE_TYPE_UNIFIED,
+ CTYPE_SEPARATE,
+ CTYPE_DATA,
+ CTYPE_INSTRUCTION,
+ CTYPE_UNIFIED,
};
enum {
@@ -70,37 +44,57 @@ struct cache_info {
};
#define CACHE_MAX_LEVEL 8
-
union cache_topology {
struct cache_info ci[CACHE_MAX_LEVEL];
unsigned long long raw;
};
static const char * const cache_type_string[] = {
- "Data",
+ "",
"Instruction",
+ "Data",
+ "",
"Unified",
};
-static struct cache_dir *cache_dir_cpu[NR_CPUS];
-static LIST_HEAD(cache_list);
+static const enum cache_type cache_type_map[] = {
+ [CTYPE_SEPARATE] = CACHE_TYPE_SEPARATE,
+ [CTYPE_DATA] = CACHE_TYPE_DATA,
+ [CTYPE_INSTRUCTION] = CACHE_TYPE_INST,
+ [CTYPE_UNIFIED] = CACHE_TYPE_UNIFIED,
+};
void show_cacheinfo(struct seq_file *m)
{
- struct cache *cache;
- int index = 0;
+ struct cpu_cacheinfo *this_cpu_ci;
+ struct cacheinfo *cache;
+ int idx;
- list_for_each_entry(cache, &cache_list, list) {
- seq_printf(m, "cache%-11d: ", index);
+ get_online_cpus();
+ this_cpu_ci = get_cpu_cacheinfo(cpumask_any(cpu_online_mask));
+ for (idx = 0; idx < this_cpu_ci->num_leaves; idx++) {
+ cache = this_cpu_ci->info_list + idx;
+ seq_printf(m, "cache%-11d: ", idx);
seq_printf(m, "level=%d ", cache->level);
seq_printf(m, "type=%s ", cache_type_string[cache->type]);
- seq_printf(m, "scope=%s ", cache->private ? "Private" : "Shared");
- seq_printf(m, "size=%luK ", cache->size >> 10);
- seq_printf(m, "line_size=%u ", cache->line_size);
- seq_printf(m, "associativity=%d", cache->associativity);
+ seq_printf(m, "scope=%s ",
+ cache->disable_sysfs ? "Shared" : "Private");
+ seq_printf(m, "size=%dK ", cache->size >> 10);
+ seq_printf(m, "line_size=%u ", cache->coherency_line_size);
+ seq_printf(m, "associativity=%d", cache->ways_of_associativity);
seq_puts(m, "\n");
- index++;
}
+ put_online_cpus();
+}
+
+static inline enum cache_type get_cache_type(struct cache_info *ci, int level)
+{
+ if (level >= CACHE_MAX_LEVEL)
+ return CACHE_TYPE_NOCACHE;
+ ci += level;
+ if (ci->scope != CACHE_SCOPE_SHARED && ci->scope != CACHE_SCOPE_PRIVATE)
+ return CACHE_TYPE_NOCACHE;
+ return cache_type_map[ci->type];
}
static inline unsigned long ecag(int ai, int li, int ti)
@@ -113,277 +107,71 @@ static inline unsigned long ecag(int ai, int li, int ti)
return val;
}
-static int __init cache_add(int level, int private, int type)
+static void ci_leaf_init(struct cacheinfo *this_leaf, int private,
+ enum cache_type type, unsigned int level, int cpu)
{
- struct cache *cache;
- int ti;
+ int ti, num_sets;
- cache = kzalloc(sizeof(*cache), GFP_KERNEL);
- if (!cache)
- return -ENOMEM;
- if (type == CACHE_TYPE_INSTRUCTION)
+ if (type == CACHE_TYPE_INST)
ti = CACHE_TI_INSTRUCTION;
else
ti = CACHE_TI_UNIFIED;
- cache->size = ecag(EXTRACT_SIZE, level, ti);
- cache->line_size = ecag(EXTRACT_LINE_SIZE, level, ti);
- cache->associativity = ecag(EXTRACT_ASSOCIATIVITY, level, ti);
- cache->nr_sets = cache->size / cache->associativity;
- cache->nr_sets /= cache->line_size;
- cache->private = private;
- cache->level = level + 1;
- cache->type = type - 1;
- list_add_tail(&cache->list, &cache_list);
- return 0;
-}
-
-static void __init cache_build_info(void)
-{
- struct cache *cache, *next;
+ this_leaf->level = level + 1;
+ this_leaf->type = type;
+ this_leaf->coherency_line_size = ecag(EXTRACT_LINE_SIZE, level, ti);
+ this_leaf->ways_of_associativity = ecag(EXTRACT_ASSOCIATIVITY, level, ti);
+ this_leaf->size = ecag(EXTRACT_SIZE, level, ti);
+ num_sets = this_leaf->size / this_leaf->coherency_line_size;
+ num_sets /= this_leaf->ways_of_associativity;
+ this_leaf->number_of_sets = num_sets;
+ cpumask_set_cpu(cpu, &this_leaf->shared_cpu_map);
+ if (!private)
+ this_leaf->disable_sysfs = true;
+}
+
+int init_cache_level(unsigned int cpu)
+{
+ struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
+ unsigned int level = 0, leaves = 0;
union cache_topology ct;
- int level, private, rc;
+ enum cache_type ctype;
+ if (!this_cpu_ci)
+ return -EINVAL;
ct.raw = ecag(EXTRACT_TOPOLOGY, 0, 0);
- for (level = 0; level < CACHE_MAX_LEVEL; level++) {
- switch (ct.ci[level].scope) {
- case CACHE_SCOPE_SHARED:
- private = 0;
- break;
- case CACHE_SCOPE_PRIVATE:
- private = 1;
+ do {
+ ctype = get_cache_type(&ct.ci[0], level);
+ if (ctype == CACHE_TYPE_NOCACHE)
break;
- default:
- return;
- }
- if (ct.ci[level].type == CACHE_TYPE_SEPARATE) {
- rc = cache_add(level, private, CACHE_TYPE_DATA);
- rc |= cache_add(level, private, CACHE_TYPE_INSTRUCTION);
- } else {
- rc = cache_add(level, private, ct.ci[level].type);
- }
- if (rc)
- goto error;
- }
- return;
-error:
- list_for_each_entry_safe(cache, next, &cache_list, list) {
- list_del(&cache->list);
- kfree(cache);
- }
-}
-
-static struct cache_dir *cache_create_cache_dir(int cpu)
-{
- struct cache_dir *cache_dir;
- struct kobject *kobj = NULL;
- struct device *dev;
-
- dev = get_cpu_device(cpu);
- if (!dev)
- goto out;
- kobj = kobject_create_and_add("cache", &dev->kobj);
- if (!kobj)
- goto out;
- cache_dir = kzalloc(sizeof(*cache_dir), GFP_KERNEL);
- if (!cache_dir)
- goto out;
- cache_dir->kobj = kobj;
- cache_dir_cpu[cpu] = cache_dir;
- return cache_dir;
-out:
- kobject_put(kobj);
- return NULL;
-}
-
-static struct cache_index_dir *kobj_to_cache_index_dir(struct kobject *kobj)
-{
- return container_of(kobj, struct cache_index_dir, kobj);
-}
-
-static void cache_index_release(struct kobject *kobj)
-{
- struct cache_index_dir *index;
-
- index = kobj_to_cache_index_dir(kobj);
- kfree(index);
-}
-
-static ssize_t cache_index_show(struct kobject *kobj,
- struct attribute *attr, char *buf)
-{
- struct kobj_attribute *kobj_attr;
-
- kobj_attr = container_of(attr, struct kobj_attribute, attr);
- return kobj_attr->show(kobj, kobj_attr, buf);
-}
-
-#define DEFINE_CACHE_ATTR(_name, _format, _value) \
-static ssize_t cache_##_name##_show(struct kobject *kobj, \
- struct kobj_attribute *attr, \
- char *buf) \
-{ \
- struct cache_index_dir *index; \
- \
- index = kobj_to_cache_index_dir(kobj); \
- return sprintf(buf, _format, _value); \
-} \
-static struct kobj_attribute cache_##_name##_attr = \
- __ATTR(_name, 0444, cache_##_name##_show, NULL);
-
-DEFINE_CACHE_ATTR(size, "%luK\n", index->cache->size >> 10);
-DEFINE_CACHE_ATTR(coherency_line_size, "%u\n", index->cache->line_size);
-DEFINE_CACHE_ATTR(number_of_sets, "%u\n", index->cache->nr_sets);
-DEFINE_CACHE_ATTR(ways_of_associativity, "%u\n", index->cache->associativity);
-DEFINE_CACHE_ATTR(type, "%s\n", cache_type_string[index->cache->type]);
-DEFINE_CACHE_ATTR(level, "%d\n", index->cache->level);
-
-static ssize_t shared_cpu_map_func(struct kobject *kobj, int type, char *buf)
-{
- struct cache_index_dir *index;
- int len;
-
- index = kobj_to_cache_index_dir(kobj);
- len = type ?
- cpulist_scnprintf(buf, PAGE_SIZE - 2, cpumask_of(index->cpu)) :
- cpumask_scnprintf(buf, PAGE_SIZE - 2, cpumask_of(index->cpu));
- len += sprintf(&buf[len], "\n");
- return len;
-}
-
-static ssize_t shared_cpu_map_show(struct kobject *kobj,
- struct kobj_attribute *attr, char *buf)
-{
- return shared_cpu_map_func(kobj, 0, buf);
-}
-static struct kobj_attribute cache_shared_cpu_map_attr =
- __ATTR(shared_cpu_map, 0444, shared_cpu_map_show, NULL);
-
-static ssize_t shared_cpu_list_show(struct kobject *kobj,
- struct kobj_attribute *attr, char *buf)
-{
- return shared_cpu_map_func(kobj, 1, buf);
-}
-static struct kobj_attribute cache_shared_cpu_list_attr =
- __ATTR(shared_cpu_list, 0444, shared_cpu_list_show, NULL);
-
-static struct attribute *cache_index_default_attrs[] = {
- &cache_type_attr.attr,
- &cache_size_attr.attr,
- &cache_number_of_sets_attr.attr,
- &cache_ways_of_associativity_attr.attr,
- &cache_level_attr.attr,
- &cache_coherency_line_size_attr.attr,
- &cache_shared_cpu_map_attr.attr,
- &cache_shared_cpu_list_attr.attr,
- NULL,
-};
-
-static const struct sysfs_ops cache_index_ops = {
- .show = cache_index_show,
-};
-
-static struct kobj_type cache_index_type = {
- .sysfs_ops = &cache_index_ops,
- .release = cache_index_release,
- .default_attrs = cache_index_default_attrs,
-};
-
-static int cache_create_index_dir(struct cache_dir *cache_dir,
- struct cache *cache, int index, int cpu)
-{
- struct cache_index_dir *index_dir;
- int rc;
-
- index_dir = kzalloc(sizeof(*index_dir), GFP_KERNEL);
- if (!index_dir)
- return -ENOMEM;
- index_dir->cache = cache;
- index_dir->cpu = cpu;
- rc = kobject_init_and_add(&index_dir->kobj, &cache_index_type,
- cache_dir->kobj, "index%d", index);
- if (rc)
- goto out;
- index_dir->next = cache_dir->index;
- cache_dir->index = index_dir;
- return 0;
-out:
- kfree(index_dir);
- return rc;
-}
-
-static int cache_add_cpu(int cpu)
-{
- struct cache_dir *cache_dir;
- struct cache *cache;
- int rc, index = 0;
-
- if (list_empty(&cache_list))
- return 0;
- cache_dir = cache_create_cache_dir(cpu);
- if (!cache_dir)
- return -ENOMEM;
- list_for_each_entry(cache, &cache_list, list) {
- if (!cache->private)
- break;
- rc = cache_create_index_dir(cache_dir, cache, index, cpu);
- if (rc)
- return rc;
- index++;
- }
+ /* Separate instruction and data caches */
+ leaves += (ctype == CACHE_TYPE_SEPARATE) ? 2 : 1;
+ } while (++level < CACHE_MAX_LEVEL);
+ this_cpu_ci->num_levels = level;
+ this_cpu_ci->num_leaves = leaves;
return 0;
}
-static void cache_remove_cpu(int cpu)
-{
- struct cache_index_dir *index, *next;
- struct cache_dir *cache_dir;
-
- cache_dir = cache_dir_cpu[cpu];
- if (!cache_dir)
- return;
- index = cache_dir->index;
- while (index) {
- next = index->next;
- kobject_put(&index->kobj);
- index = next;
- }
- kobject_put(cache_dir->kobj);
- kfree(cache_dir);
- cache_dir_cpu[cpu] = NULL;
-}
-
-static int cache_hotplug(struct notifier_block *nfb, unsigned long action,
- void *hcpu)
+int populate_cache_leaves(unsigned int cpu)
{
- int cpu = (long)hcpu;
- int rc = 0;
+ struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
+ struct cacheinfo *this_leaf = this_cpu_ci->info_list;
+ unsigned int level, idx, pvt;
+ union cache_topology ct;
+ enum cache_type ctype;
- switch (action & ~CPU_TASKS_FROZEN) {
- case CPU_ONLINE:
- rc = cache_add_cpu(cpu);
- if (rc)
- cache_remove_cpu(cpu);
- break;
- case CPU_DEAD:
- cache_remove_cpu(cpu);
- break;
+ ct.raw = ecag(EXTRACT_TOPOLOGY, 0, 0);
+ for (idx = 0, level = 0; level < this_cpu_ci->num_levels &&
+ idx < this_cpu_ci->num_leaves; idx++, level++) {
+ if (!this_leaf)
+ return -EINVAL;
+ pvt = (ct.ci[level].scope == CACHE_SCOPE_PRIVATE) ? 1 : 0;
+ ctype = get_cache_type(&ct.ci[0], level);
+ if (ctype == CACHE_TYPE_SEPARATE) {
+ ci_leaf_init(this_leaf++, pvt, CACHE_TYPE_DATA, level, cpu);
+ ci_leaf_init(this_leaf++, pvt, CACHE_TYPE_INST, level, cpu);
+ } else {
+ ci_leaf_init(this_leaf++, pvt, ctype, level, cpu);
+ }
}
- return rc ? NOTIFY_BAD : NOTIFY_OK;
-}
-
-static int __init cache_init(void)
-{
- int cpu;
-
- if (!test_facility(34))
- return 0;
- cache_build_info();
-
- cpu_notifier_register_begin();
- for_each_online_cpu(cpu)
- cache_add_cpu(cpu);
- __hotcpu_notifier(cache_hotplug, 0);
- cpu_notifier_register_done();
return 0;
}
-device_initcall(cache_init);
diff --git a/arch/s390/kernel/compat_signal.c b/arch/s390/kernel/compat_signal.c
index 34d5fa7b01b5..bc1df12dd4f8 100644
--- a/arch/s390/kernel/compat_signal.c
+++ b/arch/s390/kernel/compat_signal.c
@@ -209,7 +209,7 @@ static int restore_sigregs32(struct pt_regs *regs,_sigregs32 __user *sregs)
int i;
/* Alwys make any pending restarted system call return -EINTR */
- current_thread_info()->restart_block.fn = do_no_restart_syscall;
+ current->restart_block.fn = do_no_restart_syscall;
if (__copy_from_user(&user_sregs, &sregs->regs, sizeof(user_sregs)))
return -EFAULT;
diff --git a/arch/s390/kernel/dis.c b/arch/s390/kernel/dis.c
index f3762937dd82..533430307da8 100644
--- a/arch/s390/kernel/dis.c
+++ b/arch/s390/kernel/dis.c
@@ -137,7 +137,7 @@ enum {
INSTR_RSI_RRP,
INSTR_RSL_LRDFU, INSTR_RSL_R0RD,
INSTR_RSY_AARD, INSTR_RSY_CCRD, INSTR_RSY_RRRD, INSTR_RSY_RURD,
- INSTR_RSY_RDRM,
+ INSTR_RSY_RDRM, INSTR_RSY_RMRD,
INSTR_RS_AARD, INSTR_RS_CCRD, INSTR_RS_R0RD, INSTR_RS_RRRD,
INSTR_RS_RURD,
INSTR_RXE_FRRD, INSTR_RXE_RRRD, INSTR_RXE_RRRDM,
@@ -226,7 +226,6 @@ static const struct s390_operand operands[] =
[U16_32] = { 16, 32, 0 },
[J16_16] = { 16, 16, OPERAND_PCREL },
[J16_32] = { 16, 32, OPERAND_PCREL },
- [I16_32] = { 16, 32, OPERAND_SIGNED },
[I24_24] = { 24, 24, OPERAND_SIGNED },
[J32_16] = { 32, 16, OPERAND_PCREL },
[I32_16] = { 32, 16, OPERAND_SIGNED },
@@ -308,6 +307,7 @@ static const unsigned char formats[][7] = {
[INSTR_RSY_AARD] = { 0xff, A_8,A_12,D20_20,B_16,0,0 },
[INSTR_RSY_CCRD] = { 0xff, C_8,C_12,D20_20,B_16,0,0 },
[INSTR_RSY_RDRM] = { 0xff, R_8,D20_20,B_16,U4_12,0,0 },
+ [INSTR_RSY_RMRD] = { 0xff, R_8,U4_12,D20_20,B_16,0,0 },
[INSTR_RSY_RRRD] = { 0xff, R_8,R_12,D20_20,B_16,0,0 },
[INSTR_RSY_RURD] = { 0xff, R_8,U4_12,D20_20,B_16,0,0 },
[INSTR_RS_AARD] = { 0xff, A_8,A_12,D_20,B_16,0,0 },
@@ -451,7 +451,8 @@ enum {
LONG_INSN_VERLLV,
LONG_INSN_VESRAV,
LONG_INSN_VESRLV,
- LONG_INSN_VSBCBI
+ LONG_INSN_VSBCBI,
+ LONG_INSN_STCCTM
};
static char *long_insn_name[] = {
@@ -531,6 +532,7 @@ static char *long_insn_name[] = {
[LONG_INSN_VESRAV] = "vesrav",
[LONG_INSN_VESRLV] = "vesrlv",
[LONG_INSN_VSBCBI] = "vsbcbi",
+ [LONG_INSN_STCCTM] = "stcctm",
};
static struct s390_insn opcode[] = {
@@ -1656,6 +1658,7 @@ static struct s390_insn opcode_eb[] = {
{ "lric", 0x60, INSTR_RSY_RDRM },
{ "stric", 0x61, INSTR_RSY_RDRM },
{ "mric", 0x62, INSTR_RSY_RDRM },
+ { { 0, LONG_INSN_STCCTM }, 0x17, INSTR_RSY_RMRD },
#endif
{ "rll", 0x1d, INSTR_RSY_RRRD },
{ "mvclu", 0x8e, INSTR_RSY_RRRD },
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c
index 302ac1f7f8e7..4427ab7ac23a 100644
--- a/arch/s390/kernel/early.c
+++ b/arch/s390/kernel/early.c
@@ -396,6 +396,26 @@ static __init void detect_machine_facilities(void)
#endif
}
+static int __init cad_setup(char *str)
+{
+ int val;
+
+ get_option(&str, &val);
+ if (val && test_facility(128))
+ S390_lowcore.machine_flags |= MACHINE_FLAG_CAD;
+ return 0;
+}
+early_param("cad", cad_setup);
+
+static int __init cad_init(void)
+{
+ if (MACHINE_HAS_CAD)
+ /* Enable problem state CAD. */
+ __ctl_set_bit(2, 3);
+ return 0;
+}
+early_initcall(cad_init);
+
static __init void rescue_initrd(void)
{
#ifdef CONFIG_BLK_DEV_INITRD
diff --git a/arch/s390/kernel/entry.h b/arch/s390/kernel/entry.h
index 8e61393c8275..834df047d35f 100644
--- a/arch/s390/kernel/entry.h
+++ b/arch/s390/kernel/entry.h
@@ -71,9 +71,11 @@ struct s390_mmap_arg_struct;
struct fadvise64_64_args;
struct old_sigaction;
+long sys_rt_sigreturn(void);
+long sys_sigreturn(void);
+
long sys_s390_personality(unsigned int personality);
long sys_s390_runtime_instr(int command, int signum);
-
long sys_s390_pci_mmio_write(unsigned long, const void __user *, size_t);
long sys_s390_pci_mmio_read(unsigned long, void __user *, size_t);
#endif /* _ENTRY_H */
diff --git a/arch/s390/kernel/ftrace.c b/arch/s390/kernel/ftrace.c
index b86bb8823f15..82c19899574f 100644
--- a/arch/s390/kernel/ftrace.c
+++ b/arch/s390/kernel/ftrace.c
@@ -46,6 +46,13 @@
* lg %r14,8(%r15) # offset 18
* The jg instruction branches to offset 24 to skip as many instructions
* as possible.
+ * In case we use gcc's hotpatch feature the original and also the disabled
+ * function prologue contains only a single six byte instruction and looks
+ * like this:
+ * > brcl 0,0 # offset 0
+ * To enable ftrace the code gets patched like above and afterwards looks
+ * like this:
+ * > brasl %r0,ftrace_caller # offset 0
*/
unsigned long ftrace_plt;
@@ -59,62 +66,71 @@ int ftrace_modify_call(struct dyn_ftrace *rec, unsigned long old_addr,
int ftrace_make_nop(struct module *mod, struct dyn_ftrace *rec,
unsigned long addr)
{
- struct ftrace_insn insn;
- unsigned short op;
- void *from, *to;
- size_t size;
-
- ftrace_generate_nop_insn(&insn);
- size = sizeof(insn);
- from = &insn;
- to = (void *) rec->ip;
- if (probe_kernel_read(&op, (void *) rec->ip, sizeof(op)))
+ struct ftrace_insn orig, new, old;
+
+ if (probe_kernel_read(&old, (void *) rec->ip, sizeof(old)))
return -EFAULT;
- /*
- * If we find a breakpoint instruction, a kprobe has been placed
- * at the beginning of the function. We write the constant
- * KPROBE_ON_FTRACE_NOP into the remaining four bytes of the original
- * instruction so that the kprobes handler can execute a nop, if it
- * reaches this breakpoint.
- */
- if (op == BREAKPOINT_INSTRUCTION) {
- size -= 2;
- from += 2;
- to += 2;
- insn.disp = KPROBE_ON_FTRACE_NOP;
+ if (addr == MCOUNT_ADDR) {
+ /* Initial code replacement */
+#ifdef CC_USING_HOTPATCH
+ /* We expect to see brcl 0,0 */
+ ftrace_generate_nop_insn(&orig);
+#else
+ /* We expect to see stg r14,8(r15) */
+ orig.opc = 0xe3e0;
+ orig.disp = 0xf0080024;
+#endif
+ ftrace_generate_nop_insn(&new);
+ } else if (old.opc == BREAKPOINT_INSTRUCTION) {
+ /*
+ * If we find a breakpoint instruction, a kprobe has been
+ * placed at the beginning of the function. We write the
+ * constant KPROBE_ON_FTRACE_NOP into the remaining four
+ * bytes of the original instruction so that the kprobes
+ * handler can execute a nop, if it reaches this breakpoint.
+ */
+ new.opc = orig.opc = BREAKPOINT_INSTRUCTION;
+ orig.disp = KPROBE_ON_FTRACE_CALL;
+ new.disp = KPROBE_ON_FTRACE_NOP;
+ } else {
+ /* Replace ftrace call with a nop. */
+ ftrace_generate_call_insn(&orig, rec->ip);
+ ftrace_generate_nop_insn(&new);
}
- if (probe_kernel_write(to, from, size))
+ /* Verify that the to be replaced code matches what we expect. */
+ if (memcmp(&orig, &old, sizeof(old)))
+ return -EINVAL;
+ if (probe_kernel_write((void *) rec->ip, &new, sizeof(new)))
return -EPERM;
return 0;
}
int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
{
- struct ftrace_insn insn;
- unsigned short op;
- void *from, *to;
- size_t size;
-
- ftrace_generate_call_insn(&insn, rec->ip);
- size = sizeof(insn);
- from = &insn;
- to = (void *) rec->ip;
- if (probe_kernel_read(&op, (void *) rec->ip, sizeof(op)))
+ struct ftrace_insn orig, new, old;
+
+ if (probe_kernel_read(&old, (void *) rec->ip, sizeof(old)))
return -EFAULT;
- /*
- * If we find a breakpoint instruction, a kprobe has been placed
- * at the beginning of the function. We write the constant
- * KPROBE_ON_FTRACE_CALL into the remaining four bytes of the original
- * instruction so that the kprobes handler can execute a brasl if it
- * reaches this breakpoint.
- */
- if (op == BREAKPOINT_INSTRUCTION) {
- size -= 2;
- from += 2;
- to += 2;
- insn.disp = KPROBE_ON_FTRACE_CALL;
+ if (old.opc == BREAKPOINT_INSTRUCTION) {
+ /*
+ * If we find a breakpoint instruction, a kprobe has been
+ * placed at the beginning of the function. We write the
+ * constant KPROBE_ON_FTRACE_CALL into the remaining four
+ * bytes of the original instruction so that the kprobes
+ * handler can execute a brasl if it reaches this breakpoint.
+ */
+ new.opc = orig.opc = BREAKPOINT_INSTRUCTION;
+ orig.disp = KPROBE_ON_FTRACE_NOP;
+ new.disp = KPROBE_ON_FTRACE_CALL;
+ } else {
+ /* Replace nop with an ftrace call. */
+ ftrace_generate_nop_insn(&orig);
+ ftrace_generate_call_insn(&new, rec->ip);
}
- if (probe_kernel_write(to, from, size))
+ /* Verify that the to be replaced code matches what we expect. */
+ if (memcmp(&orig, &old, sizeof(old)))
+ return -EINVAL;
+ if (probe_kernel_write((void *) rec->ip, &new, sizeof(new)))
return -EPERM;
return 0;
}
diff --git a/arch/s390/kernel/head.S b/arch/s390/kernel/head.S
index d62eee11f0b5..132f4c9ade60 100644
--- a/arch/s390/kernel/head.S
+++ b/arch/s390/kernel/head.S
@@ -436,7 +436,9 @@ ENTRY(startup_kdump)
# followed by the facility words.
#if defined(CONFIG_64BIT)
-#if defined(CONFIG_MARCH_ZEC12)
+#if defined(CONFIG_MARCH_Z13)
+ .long 3, 0xc100eff2, 0xf46ce800, 0x00400000
+#elif defined(CONFIG_MARCH_ZEC12)
.long 3, 0xc100eff2, 0xf46ce800, 0x00400000
#elif defined(CONFIG_MARCH_Z196)
.long 2, 0xc100eff2, 0xf46c0000
diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index 39badb9ca0b3..5c8651f36509 100644
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -2074,7 +2074,8 @@ static void do_reset_calls(void)
u32 dump_prefix_page;
-void s390_reset_system(void (*func)(void *), void *data)
+void s390_reset_system(void (*fn_pre)(void),
+ void (*fn_post)(void *), void *data)
{
struct _lowcore *lc;
@@ -2112,7 +2113,11 @@ void s390_reset_system(void (*func)(void *), void *data)
/* Store status at absolute zero */
store_status();
+ /* Call function before reset */
+ if (fn_pre)
+ fn_pre();
do_reset_calls();
- if (func)
- func(data);
+ /* Call function after reset */
+ if (fn_post)
+ fn_post(data);
}
diff --git a/arch/s390/kernel/jump_label.c b/arch/s390/kernel/jump_label.c
index b987ab2c1541..cb2d51e779df 100644
--- a/arch/s390/kernel/jump_label.c
+++ b/arch/s390/kernel/jump_label.c
@@ -22,31 +22,66 @@ struct insn_args {
enum jump_label_type type;
};
+static void jump_label_make_nop(struct jump_entry *entry, struct insn *insn)
+{
+ /* brcl 0,0 */
+ insn->opcode = 0xc004;
+ insn->offset = 0;
+}
+
+static void jump_label_make_branch(struct jump_entry *entry, struct insn *insn)
+{
+ /* brcl 15,offset */
+ insn->opcode = 0xc0f4;
+ insn->offset = (entry->target - entry->code) >> 1;
+}
+
+static void jump_label_bug(struct jump_entry *entry, struct insn *insn)
+{
+ unsigned char *ipc = (unsigned char *)entry->code;
+ unsigned char *ipe = (unsigned char *)insn;
+
+ pr_emerg("Jump label code mismatch at %pS [%p]\n", ipc, ipc);
+ pr_emerg("Found: %02x %02x %02x %02x %02x %02x\n",
+ ipc[0], ipc[1], ipc[2], ipc[3], ipc[4], ipc[5]);
+ pr_emerg("Expected: %02x %02x %02x %02x %02x %02x\n",
+ ipe[0], ipe[1], ipe[2], ipe[3], ipe[4], ipe[5]);
+ panic("Corrupted kernel text");
+}
+
+static struct insn orignop = {
+ .opcode = 0xc004,
+ .offset = JUMP_LABEL_NOP_OFFSET >> 1,
+};
+
static void __jump_label_transform(struct jump_entry *entry,
- enum jump_label_type type)
+ enum jump_label_type type,
+ int init)
{
- struct insn insn;
- int rc;
+ struct insn old, new;
if (type == JUMP_LABEL_ENABLE) {
- /* brcl 15,offset */
- insn.opcode = 0xc0f4;
- insn.offset = (entry->target - entry->code) >> 1;
+ jump_label_make_nop(entry, &old);
+ jump_label_make_branch(entry, &new);
} else {
- /* brcl 0,0 */
- insn.opcode = 0xc004;
- insn.offset = 0;
+ jump_label_make_branch(entry, &old);
+ jump_label_make_nop(entry, &new);
}
-
- rc = probe_kernel_write((void *)entry->code, &insn, JUMP_LABEL_NOP_SIZE);
- WARN_ON_ONCE(rc < 0);
+ if (init) {
+ if (memcmp((void *)entry->code, &orignop, sizeof(orignop)))
+ jump_label_bug(entry, &old);
+ } else {
+ if (memcmp((void *)entry->code, &old, sizeof(old)))
+ jump_label_bug(entry, &old);
+ }
+ probe_kernel_write((void *)entry->code, &new, sizeof(new));
}
static int __sm_arch_jump_label_transform(void *data)
{
struct insn_args *args = data;
- __jump_label_transform(args->entry, args->type);
+ __jump_label_transform(args->entry, args->type, 0);
return 0;
}
@@ -64,7 +99,7 @@ void arch_jump_label_transform(struct jump_entry *entry,
void arch_jump_label_transform_static(struct jump_entry *entry,
enum jump_label_type type)
{
- __jump_label_transform(entry, type);
+ __jump_label_transform(entry, type, 1);
}
#endif
diff --git a/arch/s390/kernel/kprobes.c b/arch/s390/kernel/kprobes.c
index 1e4c710dfb92..f516edc1fbe3 100644
--- a/arch/s390/kernel/kprobes.c
+++ b/arch/s390/kernel/kprobes.c
@@ -69,7 +69,8 @@ static void copy_instruction(struct kprobe *p)
/*
* If kprobes patches the instruction that is morphed by
* ftrace make sure that kprobes always sees the branch
- * "jg .+24" that skips the mcount block
+ * "jg .+24" that skips the mcount block or the "brcl 0,0"
+ * in case of hotpatch.
*/
ftrace_generate_nop_insn((struct ftrace_insn *)p->ainsn.insn);
p->ainsn.is_ftrace_insn = 1;
diff --git a/arch/s390/kernel/machine_kexec.c b/arch/s390/kernel/machine_kexec.c
index 4685337fa7c6..fb0901ec4306 100644
--- a/arch/s390/kernel/machine_kexec.c
+++ b/arch/s390/kernel/machine_kexec.c
@@ -103,21 +103,18 @@ static int __init machine_kdump_pm_init(void)
return 0;
}
arch_initcall(machine_kdump_pm_init);
-#endif
/*
* Start kdump: We expect here that a store status has been done on our CPU
*/
static void __do_machine_kdump(void *image)
{
-#ifdef CONFIG_CRASH_DUMP
int (*start_kdump)(int) = (void *)((struct kimage *) image)->start;
- setup_regs();
__load_psw_mask(PSW_MASK_BASE | PSW_DEFAULT_KEY | PSW_MASK_EA | PSW_MASK_BA);
start_kdump(1);
-#endif
}
+#endif
/*
* Check if kdump checksums are valid: We call purgatory with parameter "0"
@@ -249,18 +246,18 @@ static void __do_machine_kexec(void *data)
*/
static void __machine_kexec(void *data)
{
- struct kimage *image = data;
-
__arch_local_irq_stosm(0x04); /* enable DAT */
pfault_fini();
tracing_off();
debug_locks_off();
- if (image->type == KEXEC_TYPE_CRASH) {
+#ifdef CONFIG_CRASH_DUMP
+ if (((struct kimage *) data)->type == KEXEC_TYPE_CRASH) {
+
lgr_info_log();
- s390_reset_system(__do_machine_kdump, data);
- } else {
- s390_reset_system(__do_machine_kexec, data);
- }
+ s390_reset_system(setup_regs, __do_machine_kdump, data);
+ } else
+#endif
+ s390_reset_system(NULL, __do_machine_kexec, data);
disabled_wait((unsigned long) __builtin_return_address(0));
}
diff --git a/arch/s390/kernel/mcount.S b/arch/s390/kernel/mcount.S
index b6dfc5bfcb89..e499370fbccb 100644
--- a/arch/s390/kernel/mcount.S
+++ b/arch/s390/kernel/mcount.S
@@ -27,7 +27,9 @@ ENTRY(ftrace_caller)
.globl ftrace_regs_caller
.set ftrace_regs_caller,ftrace_caller
lgr %r1,%r15
+#ifndef CC_USING_HOTPATCH
aghi %r0,MCOUNT_RETURN_FIXUP
+#endif
aghi %r15,-STACK_FRAME_SIZE
stg %r1,__SF_BACKCHAIN(%r15)
stg %r1,(STACK_PTREGS_GPRS+15*8)(%r15)
diff --git a/arch/s390/kernel/module.c b/arch/s390/kernel/module.c
index 409d152585be..36154a2f1814 100644
--- a/arch/s390/kernel/module.c
+++ b/arch/s390/kernel/module.c
@@ -50,7 +50,7 @@ void *module_alloc(unsigned long size)
if (PAGE_ALIGN(size) > MODULES_LEN)
return NULL;
return __vmalloc_node_range(size, 1, MODULES_VADDR, MODULES_END,
- GFP_KERNEL, PAGE_KERNEL, NUMA_NO_NODE,
+ GFP_KERNEL, PAGE_KERNEL, 0, NUMA_NO_NODE,
__builtin_return_address(0));
}
#endif
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c
index aa7a83948c7b..13fc0978ca7e 100644
--- a/arch/s390/kernel/process.c
+++ b/arch/s390/kernel/process.c
@@ -79,6 +79,14 @@ void release_thread(struct task_struct *dead_task)
{
}
+#ifdef CONFIG_64BIT
+void arch_release_task_struct(struct task_struct *tsk)
+{
+ if (tsk->thread.vxrs)
+ kfree(tsk->thread.vxrs);
+}
+#endif
+
int copy_thread(unsigned long clone_flags, unsigned long new_stackp,
unsigned long arg, struct task_struct *p)
{
@@ -243,13 +251,3 @@ unsigned long arch_randomize_brk(struct mm_struct *mm)
ret = PAGE_ALIGN(mm->brk + brk_rnd());
return (ret > mm->brk) ? ret : mm->brk;
}
-
-unsigned long randomize_et_dyn(unsigned long base)
-{
- unsigned long ret;
-
- if (!(current->flags & PF_RANDOMIZE))
- return base;
- ret = PAGE_ALIGN(base + brk_rnd());
- return (ret > base) ? ret : base;
-}
diff --git a/arch/s390/kernel/processor.c b/arch/s390/kernel/processor.c
index dbdd33ee0102..26108232fcaa 100644
--- a/arch/s390/kernel/processor.c
+++ b/arch/s390/kernel/processor.c
@@ -8,16 +8,24 @@
#include <linux/kernel.h>
#include <linux/init.h>
-#include <linux/smp.h>
#include <linux/seq_file.h>
#include <linux/delay.h>
#include <linux/cpu.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 cpu_relax(void)
+{
+ if (!smp_cpu_mtid && MACHINE_HAS_DIAG44)
+ asm volatile("diag 0,0,0x44");
+ barrier();
+}
+EXPORT_SYMBOL(cpu_relax);
+
/*
* cpu_init - initializes state that is per-CPU.
*/
diff --git a/arch/s390/kernel/sclp.S b/arch/s390/kernel/sclp.S
index a41f2c99dcc8..7e77e03378f3 100644
--- a/arch/s390/kernel/sclp.S
+++ b/arch/s390/kernel/sclp.S
@@ -294,7 +294,8 @@ ENTRY(_sclp_print_early)
#ifdef CONFIG_64BIT
tm LC_AR_MODE_ID,1
jno .Lesa3
- lmh %r6,%r15,96(%r15) # store upper register halves
+ lgfr %r2,%r2 # sign extend return value
+ lmh %r6,%r15,96(%r15) # restore upper register halves
ahi %r15,80
.Lesa3:
#endif
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 4e532c67832f..a5ea8bc17cb3 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -810,6 +810,9 @@ static void __init setup_hwcaps(void)
case 0x2828:
strcpy(elf_platform, "zEC12");
break;
+ case 0x2964:
+ strcpy(elf_platform, "z13");
+ break;
}
}
@@ -906,7 +909,6 @@ void __init setup_arch(char **cmdline_p)
setup_lowcore();
smp_fill_possible_mask();
cpu_init();
- s390_init_cpu_topology();
/*
* Setup capabilities (ELF_HWCAP & ELF_PLATFORM).
diff --git a/arch/s390/kernel/signal.c b/arch/s390/kernel/signal.c
index 6a2ac257d98f..b3ae6f70c6d6 100644
--- a/arch/s390/kernel/signal.c
+++ b/arch/s390/kernel/signal.c
@@ -162,7 +162,7 @@ static int restore_sigregs(struct pt_regs *regs, _sigregs __user *sregs)
_sigregs user_sregs;
/* Alwys make any pending restarted system call return -EINTR */
- current_thread_info()->restart_block.fn = do_no_restart_syscall;
+ current->restart_block.fn = do_no_restart_syscall;
if (__copy_from_user(&user_sregs, sregs, sizeof(user_sregs)))
return -EFAULT;
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 0b499f5cbe19..db8f1115a3bf 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -59,21 +59,41 @@ enum {
CPU_STATE_CONFIGURED,
};
+static DEFINE_PER_CPU(struct cpu *, cpu_device);
+
struct pcpu {
- struct cpu *cpu;
struct _lowcore *lowcore; /* lowcore page(s) for the cpu */
- unsigned long async_stack; /* async stack for the cpu */
- unsigned long panic_stack; /* panic stack for the cpu */
unsigned long ec_mask; /* bit mask for ec_xxx functions */
- int state; /* physical cpu state */
- int polarization; /* physical polarization */
+ signed char state; /* physical cpu state */
+ signed char polarization; /* physical polarization */
u16 address; /* physical cpu address */
};
static u8 boot_cpu_type;
-static u16 boot_cpu_address;
static struct pcpu pcpu_devices[NR_CPUS];
+unsigned int smp_cpu_mt_shift;
+EXPORT_SYMBOL(smp_cpu_mt_shift);
+
+unsigned int smp_cpu_mtid;
+EXPORT_SYMBOL(smp_cpu_mtid);
+
+static unsigned int smp_max_threads __initdata = -1U;
+
+static int __init early_nosmt(char *s)
+{
+ smp_max_threads = 1;
+ return 0;
+}
+early_param("nosmt", early_nosmt);
+
+static int __init early_smt(char *s)
+{
+ get_option(&s, &smp_max_threads);
+ return 0;
+}
+early_param("smt", early_smt);
+
/*
* The smp_cpu_state_mutex must be held when changing the state or polarization
* member of a pcpu data structure within the pcpu_devices arreay.
@@ -132,7 +152,7 @@ static inline int pcpu_running(struct pcpu *pcpu)
/*
* Find struct pcpu by cpu address.
*/
-static struct pcpu *pcpu_find_address(const struct cpumask *mask, int address)
+static struct pcpu *pcpu_find_address(const struct cpumask *mask, u16 address)
{
int cpu;
@@ -152,25 +172,30 @@ static void pcpu_ec_call(struct pcpu *pcpu, int ec_bit)
pcpu_sigp_retry(pcpu, order, 0);
}
+#define ASYNC_FRAME_OFFSET (ASYNC_SIZE - STACK_FRAME_OVERHEAD - __PT_SIZE)
+#define PANIC_FRAME_OFFSET (PAGE_SIZE - STACK_FRAME_OVERHEAD - __PT_SIZE)
+
static int pcpu_alloc_lowcore(struct pcpu *pcpu, int cpu)
{
+ unsigned long async_stack, panic_stack;
struct _lowcore *lc;
if (pcpu != &pcpu_devices[0]) {
pcpu->lowcore = (struct _lowcore *)
__get_free_pages(GFP_KERNEL | GFP_DMA, LC_ORDER);
- pcpu->async_stack = __get_free_pages(GFP_KERNEL, ASYNC_ORDER);
- pcpu->panic_stack = __get_free_page(GFP_KERNEL);
- if (!pcpu->lowcore || !pcpu->panic_stack || !pcpu->async_stack)
+ async_stack = __get_free_pages(GFP_KERNEL, ASYNC_ORDER);
+ panic_stack = __get_free_page(GFP_KERNEL);
+ if (!pcpu->lowcore || !panic_stack || !async_stack)
goto out;
+ } else {
+ async_stack = pcpu->lowcore->async_stack - ASYNC_FRAME_OFFSET;
+ panic_stack = pcpu->lowcore->panic_stack - PANIC_FRAME_OFFSET;
}
lc = pcpu->lowcore;
memcpy(lc, &S390_lowcore, 512);
memset((char *) lc + 512, 0, sizeof(*lc) - 512);
- lc->async_stack = pcpu->async_stack + ASYNC_SIZE
- - STACK_FRAME_OVERHEAD - sizeof(struct pt_regs);
- lc->panic_stack = pcpu->panic_stack + PAGE_SIZE
- - STACK_FRAME_OVERHEAD - sizeof(struct pt_regs);
+ lc->async_stack = async_stack + ASYNC_FRAME_OFFSET;
+ lc->panic_stack = panic_stack + PANIC_FRAME_OFFSET;
lc->cpu_nr = cpu;
lc->spinlock_lockval = arch_spin_lockval(cpu);
#ifndef CONFIG_64BIT
@@ -191,8 +216,8 @@ static int pcpu_alloc_lowcore(struct pcpu *pcpu, int cpu)
return 0;
out:
if (pcpu != &pcpu_devices[0]) {
- free_page(pcpu->panic_stack);
- free_pages(pcpu->async_stack, ASYNC_ORDER);
+ free_page(panic_stack);
+ free_pages(async_stack, ASYNC_ORDER);
free_pages((unsigned long) pcpu->lowcore, LC_ORDER);
}
return -ENOMEM;
@@ -214,11 +239,11 @@ static void pcpu_free_lowcore(struct pcpu *pcpu)
#else
vdso_free_per_cpu(pcpu->lowcore);
#endif
- if (pcpu != &pcpu_devices[0]) {
- free_page(pcpu->panic_stack);
- free_pages(pcpu->async_stack, ASYNC_ORDER);
- free_pages((unsigned long) pcpu->lowcore, LC_ORDER);
- }
+ if (pcpu == &pcpu_devices[0])
+ return;
+ free_page(pcpu->lowcore->panic_stack-PANIC_FRAME_OFFSET);
+ free_pages(pcpu->lowcore->async_stack-ASYNC_FRAME_OFFSET, ASYNC_ORDER);
+ free_pages((unsigned long) pcpu->lowcore, LC_ORDER);
}
#endif /* CONFIG_HOTPLUG_CPU */
@@ -299,6 +324,32 @@ static void pcpu_delegate(struct pcpu *pcpu, void (*func)(void *),
}
/*
+ * Enable additional logical cpus for multi-threading.
+ */
+static int pcpu_set_smt(unsigned int mtid)
+{
+ register unsigned long reg1 asm ("1") = (unsigned long) mtid;
+ int cc;
+
+ if (smp_cpu_mtid == mtid)
+ return 0;
+ asm volatile(
+ " sigp %1,0,%2 # sigp set multi-threading\n"
+ " ipm %0\n"
+ " srl %0,28\n"
+ : "=d" (cc) : "d" (reg1), "K" (SIGP_SET_MULTI_THREADING)
+ : "cc");
+ if (cc == 0) {
+ smp_cpu_mtid = mtid;
+ smp_cpu_mt_shift = 0;
+ while (smp_cpu_mtid >= (1U << smp_cpu_mt_shift))
+ smp_cpu_mt_shift++;
+ pcpu_devices[0].address = stap();
+ }
+ return cc;
+}
+
+/*
* Call function on an online CPU.
*/
void smp_call_online_cpu(void (*func)(void *), void *data)
@@ -319,7 +370,8 @@ void smp_call_online_cpu(void (*func)(void *), void *data)
void smp_call_ipl_cpu(void (*func)(void *), void *data)
{
pcpu_delegate(&pcpu_devices[0], func, data,
- pcpu_devices->panic_stack + PAGE_SIZE);
+ pcpu_devices->lowcore->panic_stack -
+ PANIC_FRAME_OFFSET + PAGE_SIZE);
}
int smp_find_processor_id(u16 address)
@@ -512,22 +564,17 @@ EXPORT_SYMBOL(smp_ctl_clear_bit);
#ifdef CONFIG_CRASH_DUMP
-static void __init smp_get_save_area(int cpu, u16 address)
+static inline void __smp_store_cpu_state(int cpu, u16 address, int is_boot_cpu)
{
void *lc = pcpu_devices[0].lowcore;
struct save_area_ext *sa_ext;
unsigned long vx_sa;
- if (is_kdump_kernel())
- return;
- if (!OLDMEM_BASE && (address == boot_cpu_address ||
- ipl_info.type != IPL_TYPE_FCP_DUMP))
- return;
sa_ext = dump_save_area_create(cpu);
if (!sa_ext)
panic("could not allocate memory for save area\n");
- if (address == boot_cpu_address) {
- /* Copy the registers of the boot cpu. */
+ if (is_boot_cpu) {
+ /* Copy the registers of the boot CPU. */
copy_oldmem_page(1, (void *) &sa_ext->sa, sizeof(sa_ext->sa),
SAVE_AREA_BASE - PAGE_SIZE, 0);
if (MACHINE_HAS_VX)
@@ -548,6 +595,64 @@ static void __init smp_get_save_area(int cpu, u16 address)
free_page(vx_sa);
}
+/*
+ * Collect CPU state of the previous, crashed system.
+ * There are four cases:
+ * 1) standard zfcp dump
+ * condition: OLDMEM_BASE == NULL && ipl_info.type == IPL_TYPE_FCP_DUMP
+ * The state for all CPUs except the boot CPU needs to be collected
+ * with sigp stop-and-store-status. The boot CPU state is located in
+ * the absolute lowcore of the memory stored in the HSA. The zcore code
+ * will allocate the save area and copy the boot CPU state from the HSA.
+ * 2) stand-alone kdump for SCSI (zfcp dump with swapped memory)
+ * condition: OLDMEM_BASE != NULL && ipl_info.type == IPL_TYPE_FCP_DUMP
+ * The state for all CPUs except the boot CPU needs to be collected
+ * with sigp stop-and-store-status. The firmware or the boot-loader
+ * stored the registers of the boot CPU in the absolute lowcore in the
+ * memory of the old system.
+ * 3) kdump and the old kernel did not store the CPU state,
+ * or stand-alone kdump for DASD
+ * condition: OLDMEM_BASE != NULL && !is_kdump_kernel()
+ * The state for all CPUs except the boot CPU needs to be collected
+ * with sigp stop-and-store-status. The kexec code or the boot-loader
+ * stored the registers of the boot CPU in the memory of the old system.
+ * 4) kdump and the old kernel stored the CPU state
+ * condition: OLDMEM_BASE != NULL && is_kdump_kernel()
+ * The state of all CPUs is stored in ELF sections in the memory of the
+ * old system. The ELF sections are picked up by the crash_dump code
+ * via elfcorehdr_addr.
+ */
+static void __init smp_store_cpu_states(struct sclp_cpu_info *info)
+{
+ unsigned int cpu, address, i, j;
+ int is_boot_cpu;
+
+ if (is_kdump_kernel())
+ /* Previous system stored the CPU states. Nothing to do. */
+ return;
+ if (!(OLDMEM_BASE || ipl_info.type == IPL_TYPE_FCP_DUMP))
+ /* No previous system present, normal boot. */
+ return;
+ /* Set multi-threading state to the previous system. */
+ pcpu_set_smt(sclp_get_mtid_prev());
+ /* Collect CPU states. */
+ cpu = 0;
+ for (i = 0; i < info->configured; i++) {
+ /* Skip CPUs with different CPU type. */
+ if (info->has_cpu_type && info->cpu[i].type != boot_cpu_type)
+ continue;
+ for (j = 0; j <= smp_cpu_mtid; j++, cpu++) {
+ address = (info->cpu[i].core_id << smp_cpu_mt_shift) + j;
+ is_boot_cpu = (address == pcpu_devices[0].address);
+ if (is_boot_cpu && !OLDMEM_BASE)
+ /* Skip boot CPU for standard zfcp dump. */
+ continue;
+ /* Get state for this CPu. */
+ __smp_store_cpu_state(cpu, address, is_boot_cpu);
+ }
+ }
+}
+
int smp_store_status(int cpu)
{
unsigned long vx_sa;
@@ -565,10 +670,6 @@ int smp_store_status(int cpu)
return 0;
}
-#else /* CONFIG_CRASH_DUMP */
-
-static inline void smp_get_save_area(int cpu, u16 address) { }
-
#endif /* CONFIG_CRASH_DUMP */
void smp_cpu_set_polarization(int cpu, int val)
@@ -590,11 +691,13 @@ static struct sclp_cpu_info *smp_get_cpu_info(void)
info = kzalloc(sizeof(*info), GFP_KERNEL);
if (info && (use_sigp_detection || sclp_get_cpu_info(info))) {
use_sigp_detection = 1;
- for (address = 0; address <= MAX_CPU_ADDRESS; address++) {
+ for (address = 0; address <= MAX_CPU_ADDRESS;
+ address += (1U << smp_cpu_mt_shift)) {
if (__pcpu_sigp_relax(address, SIGP_SENSE, 0, NULL) ==
SIGP_CC_NOT_OPERATIONAL)
continue;
- info->cpu[info->configured].address = address;
+ info->cpu[info->configured].core_id =
+ address >> smp_cpu_mt_shift;
info->configured++;
}
info->combined = info->configured;
@@ -608,7 +711,8 @@ static int __smp_rescan_cpus(struct sclp_cpu_info *info, int sysfs_add)
{
struct pcpu *pcpu;
cpumask_t avail;
- int cpu, nr, i;
+ int cpu, nr, i, j;
+ u16 address;
nr = 0;
cpumask_xor(&avail, cpu_possible_mask, cpu_present_mask);
@@ -616,51 +720,76 @@ static int __smp_rescan_cpus(struct sclp_cpu_info *info, int sysfs_add)
for (i = 0; (i < info->combined) && (cpu < nr_cpu_ids); i++) {
if (info->has_cpu_type && info->cpu[i].type != boot_cpu_type)
continue;
- if (pcpu_find_address(cpu_present_mask, info->cpu[i].address))
- continue;
- pcpu = pcpu_devices + cpu;
- pcpu->address = info->cpu[i].address;
- pcpu->state = (i >= info->configured) ?
- CPU_STATE_STANDBY : CPU_STATE_CONFIGURED;
- smp_cpu_set_polarization(cpu, POLARIZATION_UNKNOWN);
- set_cpu_present(cpu, true);
- if (sysfs_add && smp_add_present_cpu(cpu) != 0)
- set_cpu_present(cpu, false);
- else
- nr++;
- cpu = cpumask_next(cpu, &avail);
+ address = info->cpu[i].core_id << smp_cpu_mt_shift;
+ for (j = 0; j <= smp_cpu_mtid; j++) {
+ if (pcpu_find_address(cpu_present_mask, address + j))
+ continue;
+ pcpu = pcpu_devices + cpu;
+ pcpu->address = address + j;
+ pcpu->state =
+ (cpu >= info->configured*(smp_cpu_mtid + 1)) ?
+ CPU_STATE_STANDBY : CPU_STATE_CONFIGURED;
+ smp_cpu_set_polarization(cpu, POLARIZATION_UNKNOWN);
+ set_cpu_present(cpu, true);
+ if (sysfs_add && smp_add_present_cpu(cpu) != 0)
+ set_cpu_present(cpu, false);
+ else
+ nr++;
+ cpu = cpumask_next(cpu, &avail);
+ if (cpu >= nr_cpu_ids)
+ break;
+ }
}
return nr;
}
static void __init smp_detect_cpus(void)
{
- unsigned int cpu, c_cpus, s_cpus;
+ unsigned int cpu, mtid, c_cpus, s_cpus;
struct sclp_cpu_info *info;
+ u16 address;
+ /* Get CPU information */
info = smp_get_cpu_info();
if (!info)
panic("smp_detect_cpus failed to allocate memory\n");
+
+ /* Find boot CPU type */
if (info->has_cpu_type) {
- for (cpu = 0; cpu < info->combined; cpu++) {
- if (info->cpu[cpu].address != boot_cpu_address)
- continue;
- /* The boot cpu dictates the cpu type. */
- boot_cpu_type = info->cpu[cpu].type;
- break;
- }
+ address = stap();
+ for (cpu = 0; cpu < info->combined; cpu++)
+ if (info->cpu[cpu].core_id == address) {
+ /* The boot cpu dictates the cpu type. */
+ boot_cpu_type = info->cpu[cpu].type;
+ break;
+ }
+ if (cpu >= info->combined)
+ panic("Could not find boot CPU type");
}
+
+#ifdef CONFIG_CRASH_DUMP
+ /* Collect CPU state of previous system */
+ smp_store_cpu_states(info);
+#endif
+
+ /* Set multi-threading state for the current system */
+ mtid = sclp_get_mtid(boot_cpu_type);
+ mtid = (mtid < smp_max_threads) ? mtid : smp_max_threads - 1;
+ pcpu_set_smt(mtid);
+
+ /* Print number of CPUs */
c_cpus = s_cpus = 0;
for (cpu = 0; cpu < info->combined; cpu++) {
if (info->has_cpu_type && info->cpu[cpu].type != boot_cpu_type)
continue;
- if (cpu < info->configured) {
- smp_get_save_area(c_cpus, info->cpu[cpu].address);
- c_cpus++;
- } else
- s_cpus++;
+ if (cpu < info->configured)
+ c_cpus += smp_cpu_mtid + 1;
+ else
+ s_cpus += smp_cpu_mtid + 1;
}
pr_info("%d configured CPUs, %d standby CPUs\n", c_cpus, s_cpus);
+
+ /* Add CPUs present at boot */
get_online_cpus();
__smp_rescan_cpus(info, 0);
put_online_cpus();
@@ -696,12 +825,23 @@ static void smp_start_secondary(void *cpuvoid)
int __cpu_up(unsigned int cpu, struct task_struct *tidle)
{
struct pcpu *pcpu;
- int rc;
+ int base, i, rc;
pcpu = pcpu_devices + cpu;
if (pcpu->state != CPU_STATE_CONFIGURED)
return -EIO;
- if (pcpu_sigp_retry(pcpu, SIGP_INITIAL_CPU_RESET, 0) !=
+ base = cpu - (cpu % (smp_cpu_mtid + 1));
+ for (i = 0; i <= smp_cpu_mtid; i++) {
+ if (base + i < nr_cpu_ids)
+ if (cpu_online(base + i))
+ break;
+ }
+ /*
+ * If this is the first CPU of the core to get online
+ * do an initial CPU reset.
+ */
+ if (i > smp_cpu_mtid &&
+ pcpu_sigp_retry(pcpu_devices + base, SIGP_INITIAL_CPU_RESET, 0) !=
SIGP_CC_ORDER_CODE_ACCEPTED)
return -EIO;
@@ -774,7 +914,8 @@ void __init smp_fill_possible_mask(void)
{
unsigned int possible, sclp, cpu;
- sclp = sclp_get_max_cpu() ?: nr_cpu_ids;
+ sclp = min(smp_max_threads, sclp_get_mtid_max() + 1);
+ sclp = sclp_get_max_cpu()*sclp ?: nr_cpu_ids;
possible = setup_possible_cpus ?: nr_cpu_ids;
possible = min(possible, sclp);
for (cpu = 0; cpu < possible && cpu < nr_cpu_ids; cpu++)
@@ -796,14 +937,9 @@ void __init smp_prepare_boot_cpu(void)
{
struct pcpu *pcpu = pcpu_devices;
- boot_cpu_address = stap();
pcpu->state = CPU_STATE_CONFIGURED;
- pcpu->address = boot_cpu_address;
+ pcpu->address = stap();
pcpu->lowcore = (struct _lowcore *)(unsigned long) store_prefix();
- pcpu->async_stack = S390_lowcore.async_stack - ASYNC_SIZE
- + STACK_FRAME_OVERHEAD + sizeof(struct pt_regs);
- pcpu->panic_stack = S390_lowcore.panic_stack - PAGE_SIZE
- + STACK_FRAME_OVERHEAD + sizeof(struct pt_regs);
S390_lowcore.percpu_offset = __per_cpu_offset[0];
smp_cpu_set_polarization(0, POLARIZATION_UNKNOWN);
set_cpu_present(0, true);
@@ -848,7 +984,7 @@ static ssize_t cpu_configure_store(struct device *dev,
const char *buf, size_t count)
{
struct pcpu *pcpu;
- int cpu, val, rc;
+ int cpu, val, rc, i;
char delim;
if (sscanf(buf, "%d %c", &val, &delim) != 1)
@@ -860,29 +996,43 @@ static ssize_t cpu_configure_store(struct device *dev,
rc = -EBUSY;
/* disallow configuration changes of online cpus and cpu 0 */
cpu = dev->id;
- if (cpu_online(cpu) || cpu == 0)
+ cpu -= cpu % (smp_cpu_mtid + 1);
+ if (cpu == 0)
goto out;
+ for (i = 0; i <= smp_cpu_mtid; i++)
+ if (cpu_online(cpu + i))
+ goto out;
pcpu = pcpu_devices + cpu;
rc = 0;
switch (val) {
case 0:
if (pcpu->state != CPU_STATE_CONFIGURED)
break;
- rc = sclp_cpu_deconfigure(pcpu->address);
+ rc = sclp_cpu_deconfigure(pcpu->address >> smp_cpu_mt_shift);
if (rc)
break;
- pcpu->state = CPU_STATE_STANDBY;
- smp_cpu_set_polarization(cpu, POLARIZATION_UNKNOWN);
+ for (i = 0; i <= smp_cpu_mtid; i++) {
+ if (cpu + i >= nr_cpu_ids || !cpu_present(cpu + i))
+ continue;
+ pcpu[i].state = CPU_STATE_STANDBY;
+ smp_cpu_set_polarization(cpu + i,
+ POLARIZATION_UNKNOWN);
+ }
topology_expect_change();
break;
case 1:
if (pcpu->state != CPU_STATE_STANDBY)
break;
- rc = sclp_cpu_configure(pcpu->address);
+ rc = sclp_cpu_configure(pcpu->address >> smp_cpu_mt_shift);
if (rc)
break;
- pcpu->state = CPU_STATE_CONFIGURED;
- smp_cpu_set_polarization(cpu, POLARIZATION_UNKNOWN);
+ for (i = 0; i <= smp_cpu_mtid; i++) {
+ if (cpu + i >= nr_cpu_ids || !cpu_present(cpu + i))
+ continue;
+ pcpu[i].state = CPU_STATE_CONFIGURED;
+ smp_cpu_set_polarization(cpu + i,
+ POLARIZATION_UNKNOWN);
+ }
topology_expect_change();
break;
default:
@@ -929,8 +1079,7 @@ static int smp_cpu_notify(struct notifier_block *self, unsigned long action,
void *hcpu)
{
unsigned int cpu = (unsigned int)(long)hcpu;
- struct cpu *c = pcpu_devices[cpu].cpu;
- struct device *s = &c->dev;
+ struct device *s = &per_cpu(cpu_device, cpu)->dev;
int err = 0;
switch (action & ~CPU_TASKS_FROZEN) {
@@ -953,7 +1102,7 @@ static int smp_add_present_cpu(int cpu)
c = kzalloc(sizeof(*c), GFP_KERNEL);
if (!c)
return -ENOMEM;
- pcpu_devices[cpu].cpu = c;
+ per_cpu(cpu_device, cpu) = c;
s = &c->dev;
c->hotpluggable = 1;
rc = register_cpu(c, cpu);
diff --git a/arch/s390/kernel/sysinfo.c b/arch/s390/kernel/sysinfo.c
index 811f542b8ed4..99babea026ca 100644
--- a/arch/s390/kernel/sysinfo.c
+++ b/arch/s390/kernel/sysinfo.c
@@ -194,6 +194,41 @@ static void stsi_2_2_2(struct seq_file *m, struct sysinfo_2_2_2 *info)
seq_printf(m, "LPAR CPUs Reserved: %d\n", info->cpus_reserved);
seq_printf(m, "LPAR CPUs Dedicated: %d\n", info->cpus_dedicated);
seq_printf(m, "LPAR CPUs Shared: %d\n", info->cpus_shared);
+ if (info->mt_installed & 0x80) {
+ seq_printf(m, "LPAR CPUs G-MTID: %d\n",
+ info->mt_general & 0x1f);
+ seq_printf(m, "LPAR CPUs S-MTID: %d\n",
+ info->mt_installed & 0x1f);
+ seq_printf(m, "LPAR CPUs PS-MTID: %d\n",
+ info->mt_psmtid & 0x1f);
+ }
+}
+
+static void print_ext_name(struct seq_file *m, int lvl,
+ struct sysinfo_3_2_2 *info)
+{
+ if (info->vm[lvl].ext_name_encoding == 0)
+ return;
+ if (info->ext_names[lvl][0] == 0)
+ return;
+ switch (info->vm[lvl].ext_name_encoding) {
+ case 1: /* EBCDIC */
+ EBCASC(info->ext_names[lvl], sizeof(info->ext_names[lvl]));
+ break;
+ case 2: /* UTF-8 */
+ break;
+ default:
+ return;
+ }
+ seq_printf(m, "VM%02d Extended Name: %-.256s\n", lvl,
+ info->ext_names[lvl]);
+}
+
+static void print_uuid(struct seq_file *m, int i, struct sysinfo_3_2_2 *info)
+{
+ if (!memcmp(&info->vm[i].uuid, &NULL_UUID_BE, sizeof(uuid_be)))
+ return;
+ seq_printf(m, "VM%02d UUID: %pUb\n", i, &info->vm[i].uuid);
}
static void stsi_3_2_2(struct seq_file *m, struct sysinfo_3_2_2 *info)
@@ -213,6 +248,8 @@ static void stsi_3_2_2(struct seq_file *m, struct sysinfo_3_2_2 *info)
seq_printf(m, "VM%02d CPUs Configured: %d\n", i, info->vm[i].cpus_configured);
seq_printf(m, "VM%02d CPUs Standby: %d\n", i, info->vm[i].cpus_standby);
seq_printf(m, "VM%02d CPUs Reserved: %d\n", i, info->vm[i].cpus_reserved);
+ print_ext_name(m, i, info);
+ print_uuid(m, i, info);
}
}
diff --git a/arch/s390/kernel/topology.c b/arch/s390/kernel/topology.c
index b93bed76ea94..14da43b801d9 100644
--- a/arch/s390/kernel/topology.c
+++ b/arch/s390/kernel/topology.c
@@ -7,14 +7,14 @@
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/workqueue.h>
-#include <linux/bootmem.h>
#include <linux/cpuset.h>
#include <linux/device.h>
#include <linux/export.h>
#include <linux/kernel.h>
#include <linux/sched.h>
-#include <linux/init.h>
#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/slab.h>
#include <linux/cpu.h>
#include <linux/smp.h>
#include <linux/mm.h>
@@ -42,8 +42,8 @@ static DEFINE_SPINLOCK(topology_lock);
static struct mask_info socket_info;
static struct mask_info book_info;
-struct cpu_topology_s390 cpu_topology[NR_CPUS];
-EXPORT_SYMBOL_GPL(cpu_topology);
+DEFINE_PER_CPU(struct cpu_topology_s390, cpu_topology);
+EXPORT_PER_CPU_SYMBOL_GPL(cpu_topology);
static cpumask_t cpu_group_map(struct mask_info *info, unsigned int cpu)
{
@@ -59,32 +59,50 @@ static cpumask_t cpu_group_map(struct mask_info *info, unsigned int cpu)
return mask;
}
-static struct mask_info *add_cpus_to_mask(struct topology_cpu *tl_cpu,
+static cpumask_t cpu_thread_map(unsigned int cpu)
+{
+ cpumask_t mask;
+ int i;
+
+ cpumask_copy(&mask, cpumask_of(cpu));
+ if (!topology_enabled || !MACHINE_HAS_TOPOLOGY)
+ return mask;
+ cpu -= cpu % (smp_cpu_mtid + 1);
+ for (i = 0; i <= smp_cpu_mtid; i++)
+ if (cpu_present(cpu + i))
+ cpumask_set_cpu(cpu + i, &mask);
+ return mask;
+}
+
+static struct mask_info *add_cpus_to_mask(struct topology_core *tl_core,
struct mask_info *book,
struct mask_info *socket,
int one_socket_per_cpu)
{
- unsigned int cpu;
+ unsigned int core;
- for_each_set_bit(cpu, &tl_cpu->mask[0], TOPOLOGY_CPU_BITS) {
- unsigned int rcpu;
- int lcpu;
+ for_each_set_bit(core, &tl_core->mask[0], TOPOLOGY_CORE_BITS) {
+ unsigned int rcore;
+ int lcpu, i;
- rcpu = TOPOLOGY_CPU_BITS - 1 - cpu + tl_cpu->origin;
- lcpu = smp_find_processor_id(rcpu);
+ rcore = TOPOLOGY_CORE_BITS - 1 - core + tl_core->origin;
+ lcpu = smp_find_processor_id(rcore << smp_cpu_mt_shift);
if (lcpu < 0)
continue;
- cpumask_set_cpu(lcpu, &book->mask);
- cpu_topology[lcpu].book_id = book->id;
- cpumask_set_cpu(lcpu, &socket->mask);
- cpu_topology[lcpu].core_id = rcpu;
- if (one_socket_per_cpu) {
- cpu_topology[lcpu].socket_id = rcpu;
- socket = socket->next;
- } else {
- cpu_topology[lcpu].socket_id = socket->id;
+ for (i = 0; i <= smp_cpu_mtid; i++) {
+ per_cpu(cpu_topology, lcpu + i).book_id = book->id;
+ per_cpu(cpu_topology, lcpu + i).core_id = rcore;
+ per_cpu(cpu_topology, lcpu + i).thread_id = lcpu + i;
+ cpumask_set_cpu(lcpu + i, &book->mask);
+ cpumask_set_cpu(lcpu + i, &socket->mask);
+ if (one_socket_per_cpu)
+ per_cpu(cpu_topology, lcpu + i).socket_id = rcore;
+ else
+ per_cpu(cpu_topology, lcpu + i).socket_id = socket->id;
+ smp_cpu_set_polarization(lcpu + i, tl_core->pp);
}
- smp_cpu_set_polarization(lcpu, tl_cpu->pp);
+ if (one_socket_per_cpu)
+ socket = socket->next;
}
return socket;
}
@@ -108,7 +126,7 @@ static void clear_masks(void)
static union topology_entry *next_tle(union topology_entry *tle)
{
if (!tle->nl)
- return (union topology_entry *)((struct topology_cpu *)tle + 1);
+ return (union topology_entry *)((struct topology_core *)tle + 1);
return (union topology_entry *)((struct topology_container *)tle + 1);
}
@@ -231,12 +249,14 @@ static void update_cpu_masks(void)
spin_lock_irqsave(&topology_lock, flags);
for_each_possible_cpu(cpu) {
- cpu_topology[cpu].core_mask = cpu_group_map(&socket_info, cpu);
- cpu_topology[cpu].book_mask = cpu_group_map(&book_info, cpu);
+ per_cpu(cpu_topology, cpu).thread_mask = cpu_thread_map(cpu);
+ per_cpu(cpu_topology, cpu).core_mask = cpu_group_map(&socket_info, cpu);
+ per_cpu(cpu_topology, cpu).book_mask = cpu_group_map(&book_info, cpu);
if (!MACHINE_HAS_TOPOLOGY) {
- cpu_topology[cpu].core_id = cpu;
- cpu_topology[cpu].socket_id = cpu;
- cpu_topology[cpu].book_id = cpu;
+ per_cpu(cpu_topology, cpu).thread_id = cpu;
+ per_cpu(cpu_topology, cpu).core_id = cpu;
+ per_cpu(cpu_topology, cpu).socket_id = cpu;
+ per_cpu(cpu_topology, cpu).book_id = cpu;
}
}
spin_unlock_irqrestore(&topology_lock, flags);
@@ -314,50 +334,6 @@ void topology_expect_change(void)
set_topology_timer();
}
-static int __init early_parse_topology(char *p)
-{
- if (strncmp(p, "off", 3))
- return 0;
- topology_enabled = 0;
- return 0;
-}
-early_param("topology", early_parse_topology);
-
-static void __init alloc_masks(struct sysinfo_15_1_x *info,
- struct mask_info *mask, int offset)
-{
- int i, nr_masks;
-
- nr_masks = info->mag[TOPOLOGY_NR_MAG - offset];
- for (i = 0; i < info->mnest - offset; i++)
- nr_masks *= info->mag[TOPOLOGY_NR_MAG - offset - 1 - i];
- nr_masks = max(nr_masks, 1);
- for (i = 0; i < nr_masks; i++) {
- mask->next = alloc_bootmem_align(
- roundup_pow_of_two(sizeof(struct mask_info)),
- roundup_pow_of_two(sizeof(struct mask_info)));
- mask = mask->next;
- }
-}
-
-void __init s390_init_cpu_topology(void)
-{
- struct sysinfo_15_1_x *info;
- int i;
-
- if (!MACHINE_HAS_TOPOLOGY)
- return;
- tl_info = alloc_bootmem_pages(PAGE_SIZE);
- info = tl_info;
- store_topology(info);
- pr_info("The CPU configuration topology of the machine is:");
- for (i = 0; i < TOPOLOGY_NR_MAG; i++)
- printk(KERN_CONT " %d", info->mag[i]);
- printk(KERN_CONT " / %d\n", info->mnest);
- alloc_masks(info, &socket_info, 1);
- alloc_masks(info, &book_info, 2);
-}
-
static int cpu_management;
static ssize_t dispatching_show(struct device *dev,
@@ -445,23 +421,75 @@ int topology_cpu_init(struct cpu *cpu)
return sysfs_create_group(&cpu->dev.kobj, &topology_cpu_attr_group);
}
+const struct cpumask *cpu_thread_mask(int cpu)
+{
+ return &per_cpu(cpu_topology, cpu).thread_mask;
+}
+
+
const struct cpumask *cpu_coregroup_mask(int cpu)
{
- return &cpu_topology[cpu].core_mask;
+ return &per_cpu(cpu_topology, cpu).core_mask;
}
static const struct cpumask *cpu_book_mask(int cpu)
{
- return &cpu_topology[cpu].book_mask;
+ return &per_cpu(cpu_topology, cpu).book_mask;
+}
+
+static int __init early_parse_topology(char *p)
+{
+ if (strncmp(p, "off", 3))
+ return 0;
+ topology_enabled = 0;
+ return 0;
}
+early_param("topology", early_parse_topology);
static struct sched_domain_topology_level s390_topology[] = {
+ { cpu_thread_mask, cpu_smt_flags, SD_INIT_NAME(SMT) },
{ cpu_coregroup_mask, cpu_core_flags, SD_INIT_NAME(MC) },
{ cpu_book_mask, SD_INIT_NAME(BOOK) },
{ cpu_cpu_mask, SD_INIT_NAME(DIE) },
{ NULL, },
};
+static void __init alloc_masks(struct sysinfo_15_1_x *info,
+ struct mask_info *mask, int offset)
+{
+ int i, nr_masks;
+
+ nr_masks = info->mag[TOPOLOGY_NR_MAG - offset];
+ for (i = 0; i < info->mnest - offset; i++)
+ nr_masks *= info->mag[TOPOLOGY_NR_MAG - offset - 1 - i];
+ nr_masks = max(nr_masks, 1);
+ for (i = 0; i < nr_masks; i++) {
+ mask->next = kzalloc(sizeof(*mask->next), GFP_KERNEL);
+ mask = mask->next;
+ }
+}
+
+static int __init s390_topology_init(void)
+{
+ struct sysinfo_15_1_x *info;
+ int i;
+
+ if (!MACHINE_HAS_TOPOLOGY)
+ return 0;
+ tl_info = (struct sysinfo_15_1_x *)__get_free_page(GFP_KERNEL);
+ info = tl_info;
+ store_topology(info);
+ pr_info("The CPU configuration topology of the machine is:");
+ for (i = 0; i < TOPOLOGY_NR_MAG; i++)
+ printk(KERN_CONT " %d", info->mag[i]);
+ printk(KERN_CONT " / %d\n", info->mnest);
+ alloc_masks(info, &socket_info, 1);
+ alloc_masks(info, &book_info, 2);
+ set_sched_topology(s390_topology);
+ return 0;
+}
+early_initcall(s390_topology_init);
+
static int __init topology_init(void)
{
if (MACHINE_HAS_TOPOLOGY)
@@ -471,10 +499,3 @@ static int __init topology_init(void)
return device_create_file(cpu_subsys.dev_root, &dev_attr_dispatching);
}
device_initcall(topology_init);
-
-static int __init early_topology_init(void)
-{
- set_sched_topology(s390_topology);
- return 0;
-}
-early_initcall(early_topology_init);
diff --git a/arch/s390/kernel/vdso64/clock_gettime.S b/arch/s390/kernel/vdso64/clock_gettime.S
index 7699e735ae28..61541fb93dc6 100644
--- a/arch/s390/kernel/vdso64/clock_gettime.S
+++ b/arch/s390/kernel/vdso64/clock_gettime.S
@@ -25,9 +25,7 @@ __kernel_clock_gettime:
je 4f
cghi %r2,__CLOCK_REALTIME
je 5f
- cghi %r2,__CLOCK_THREAD_CPUTIME_ID
- je 9f
- cghi %r2,-2 /* Per-thread CPUCLOCK with PID=0, VIRT=1 */
+ cghi %r2,-3 /* Per-thread CPUCLOCK with PID=0, VIRT=1 */
je 9f
cghi %r2,__CLOCK_MONOTONIC_COARSE
je 3f
@@ -106,7 +104,7 @@ __kernel_clock_gettime:
aghi %r15,16
br %r14
- /* CLOCK_THREAD_CPUTIME_ID for this thread */
+ /* CPUCLOCK_VIRT for this thread */
9: icm %r0,15,__VDSO_ECTG_OK(%r5)
jz 12f
ear %r2,%a4
diff --git a/arch/s390/kernel/vtime.c b/arch/s390/kernel/vtime.c
index e34122e539a1..e53d3595a7c8 100644
--- a/arch/s390/kernel/vtime.c
+++ b/arch/s390/kernel/vtime.c
@@ -15,6 +15,8 @@
#include <asm/cputime.h>
#include <asm/vtimer.h>
#include <asm/vtime.h>
+#include <asm/cpu_mf.h>
+#include <asm/smp.h>
static void virt_timer_expire(void);
@@ -23,6 +25,10 @@ static DEFINE_SPINLOCK(virt_timer_lock);
static atomic64_t virt_timer_current;
static atomic64_t virt_timer_elapsed;
+static DEFINE_PER_CPU(u64, mt_cycles[32]);
+static DEFINE_PER_CPU(u64, mt_scaling_mult) = { 1 };
+static DEFINE_PER_CPU(u64, mt_scaling_div) = { 1 };
+
static inline u64 get_vtimer(void)
{
u64 timer;
@@ -61,6 +67,8 @@ static int do_account_vtime(struct task_struct *tsk, int hardirq_offset)
{
struct thread_info *ti = task_thread_info(tsk);
u64 timer, clock, user, system, steal;
+ u64 user_scaled, system_scaled;
+ int i;
timer = S390_lowcore.last_update_timer;
clock = S390_lowcore.last_update_clock;
@@ -76,15 +84,49 @@ static int do_account_vtime(struct task_struct *tsk, int hardirq_offset)
S390_lowcore.system_timer += timer - S390_lowcore.last_update_timer;
S390_lowcore.steal_timer += S390_lowcore.last_update_clock - clock;
+ /* Do MT utilization calculation */
+ if (smp_cpu_mtid) {
+ u64 cycles_new[32], *cycles_old;
+ u64 delta, mult, div;
+
+ cycles_old = this_cpu_ptr(mt_cycles);
+ if (stcctm5(smp_cpu_mtid + 1, cycles_new) < 2) {
+ mult = div = 0;
+ for (i = 0; i <= smp_cpu_mtid; i++) {
+ delta = cycles_new[i] - cycles_old[i];
+ mult += delta;
+ div += (i + 1) * delta;
+ }
+ if (mult > 0) {
+ /* Update scaling factor */
+ __this_cpu_write(mt_scaling_mult, mult);
+ __this_cpu_write(mt_scaling_div, div);
+ memcpy(cycles_old, cycles_new,
+ sizeof(u64) * (smp_cpu_mtid + 1));
+ }
+ }
+ }
+
user = S390_lowcore.user_timer - ti->user_timer;
S390_lowcore.steal_timer -= user;
ti->user_timer = S390_lowcore.user_timer;
- account_user_time(tsk, user, user);
system = S390_lowcore.system_timer - ti->system_timer;
S390_lowcore.steal_timer -= system;
ti->system_timer = S390_lowcore.system_timer;
- account_system_time(tsk, hardirq_offset, system, system);
+
+ user_scaled = user;
+ system_scaled = system;
+ /* Do MT utilization scaling */
+ if (smp_cpu_mtid) {
+ u64 mult = __this_cpu_read(mt_scaling_mult);
+ u64 div = __this_cpu_read(mt_scaling_div);
+
+ user_scaled = (user_scaled * mult) / div;
+ system_scaled = (system_scaled * mult) / div;
+ }
+ account_user_time(tsk, user, user_scaled);
+ account_system_time(tsk, hardirq_offset, system, system_scaled);
steal = S390_lowcore.steal_timer;
if ((s64) steal > 0) {
@@ -126,7 +168,7 @@ void vtime_account_user(struct task_struct *tsk)
void vtime_account_irq_enter(struct task_struct *tsk)
{
struct thread_info *ti = task_thread_info(tsk);
- u64 timer, system;
+ u64 timer, system, system_scaled;
timer = S390_lowcore.last_update_timer;
S390_lowcore.last_update_timer = get_vtimer();
@@ -135,7 +177,15 @@ void vtime_account_irq_enter(struct task_struct *tsk)
system = S390_lowcore.system_timer - ti->system_timer;
S390_lowcore.steal_timer -= system;
ti->system_timer = S390_lowcore.system_timer;
- account_system_time(tsk, 0, system, system);
+ system_scaled = system;
+ /* Do MT utilization scaling */
+ if (smp_cpu_mtid) {
+ u64 mult = __this_cpu_read(mt_scaling_mult);
+ u64 div = __this_cpu_read(mt_scaling_div);
+
+ system_scaled = (system_scaled * mult) / div;
+ }
+ account_system_time(tsk, 0, system, system_scaled);
virt_timer_forward(system);
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-21 14:50:24 +0100