AuxXxilium/linux_dsm_epyc7002
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Merge branches 'x86-alternatives-for-linus', 'x86-fpu-for-linus', 'x86-hwmon-for-linus', 'x86-paravirt-for-linus', 'core-locking-for-linus' and 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

Browse Source 
* 'x86-alternatives-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, suspend: Avoid unnecessary smp alternatives switch during suspend/resume

* 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86-64, asm: Use fxsaveq/fxrestorq in more places

* 'x86-hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, hwmon: Add core threshold notification to therm_throt.c

* 'x86-paravirt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, paravirt: Use native_halt on a halt, not native_safe_halt

* 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  locking, lockdep: Convert sprintf_symbol to %pS

* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  irq: Better struct irqaction layout
This commit is contained in:
Linus Torvalds 2011-01-06 11:11:50 -08:00
commit 47935a731b
11 changed files with 117 additions and 15 deletions
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1
arch/x86/include/asm/alternative.h
View File

@ -66,6 +66,7 @@ extern void alternatives_smp_module_add(struct module *mod, char *name,
extern void alternatives_smp_module_del(struct module *mod);
extern void alternatives_smp_switch(int smp);
extern int alternatives_text_reserved(void *start, void *end);
extern bool skip_smp_alternatives;
#else
static inline void alternatives_smp_module_add(struct module *mod, char *name,
void *locks, void *locks_end,

24
arch/x86/include/asm/i387.h
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@ -93,6 +93,17 @@ static inline int fxrstor_checking(struct i387_fxsave_struct *fx)
int err;
/* See comment in fxsave() below. */
#ifdef CONFIG_AS_FXSAVEQ
asm volatile("1: fxrstorq %[fx]\n\t"
"2:\n"
".section .fixup,\"ax\"\n"
"3: movl $-1,%[err]\n"
" jmp 2b\n"
".previous\n"
_ASM_EXTABLE(1b, 3b)
: [err] "=r" (err)
: [fx] "m" (*fx), "0" (0));
#else
asm volatile("1: rex64/fxrstor (%[fx])\n\t"
"2:\n"
".section .fixup,\"ax\"\n"
@ -102,6 +113,7 @@ static inline int fxrstor_checking(struct i387_fxsave_struct *fx)
_ASM_EXTABLE(1b, 3b)
: [err] "=r" (err)
: [fx] "R" (fx), "m" (*fx), "0" (0));
#endif
return err;
}
@ -119,6 +131,17 @@ static inline int fxsave_user(struct i387_fxsave_struct __user *fx)
return -EFAULT;
/* See comment in fxsave() below. */
#ifdef CONFIG_AS_FXSAVEQ
asm volatile("1: fxsaveq %[fx]\n\t"
"2:\n"
".section .fixup,\"ax\"\n"
"3: movl $-1,%[err]\n"
" jmp 2b\n"
".previous\n"
_ASM_EXTABLE(1b, 3b)
: [err] "=r" (err), [fx] "=m" (*fx)
: "0" (0));
#else
asm volatile("1: rex64/fxsave (%[fx])\n\t"
"2:\n"
".section .fixup,\"ax\"\n"
@ -128,6 +151,7 @@ static inline int fxsave_user(struct i387_fxsave_struct __user *fx)
_ASM_EXTABLE(1b, 3b)
: [err] "=r" (err), "=m" (*fx)
: [fx] "R" (fx), "0" (0));
#endif
if (unlikely(err) &&
__clear_user(fx, sizeof(struct i387_fxsave_struct)))
err = -EFAULT;

3
arch/x86/include/asm/mce.h
View File

@ -223,6 +223,9 @@ void intel_init_thermal(struct cpuinfo_x86 *c);
void mce_log_therm_throt_event(__u64 status);
/* Interrupt Handler for core thermal thresholds */
extern int (*platform_thermal_notify)(__u64 msr_val);
#ifdef CONFIG_X86_THERMAL_VECTOR
extern void mcheck_intel_therm_init(void);
#else

12
arch/x86/include/asm/msr-index.h
View File

@ -257,6 +257,18 @@
#define PACKAGE_THERM_INT_LOW_ENABLE (1 << 1)
#define PACKAGE_THERM_INT_PLN_ENABLE (1 << 24)
/* Thermal Thresholds Support */
#define THERM_INT_THRESHOLD0_ENABLE (1 << 15)
#define THERM_SHIFT_THRESHOLD0 8
#define THERM_MASK_THRESHOLD0 (0x7f << THERM_SHIFT_THRESHOLD0)
#define THERM_INT_THRESHOLD1_ENABLE (1 << 23)
#define THERM_SHIFT_THRESHOLD1 16
#define THERM_MASK_THRESHOLD1 (0x7f << THERM_SHIFT_THRESHOLD1)
#define THERM_STATUS_THRESHOLD0 (1 << 6)
#define THERM_LOG_THRESHOLD0 (1 << 7)
#define THERM_STATUS_THRESHOLD1 (1 << 8)
#define THERM_LOG_THRESHOLD1 (1 << 9)
/* MISC_ENABLE bits: architectural */
#define MSR_IA32_MISC_ENABLE_FAST_STRING (1ULL << 0)
#define MSR_IA32_MISC_ENABLE_TCC (1ULL << 1)

2
arch/x86/include/asm/paravirt.h
View File

@ -112,7 +112,7 @@ static inline void arch_safe_halt(void)
static inline void halt(void)
{
PVOP_VCALL0(pv_irq_ops.safe_halt);
PVOP_VCALL0(pv_irq_ops.halt);
}
static inline void wbinvd(void)

3
arch/x86/kernel/alternative.c
View File

@ -353,6 +353,7 @@ void __init_or_module alternatives_smp_module_del(struct module *mod)
mutex_unlock(&smp_alt);
}
bool skip_smp_alternatives;
void alternatives_smp_switch(int smp)
{
struct smp_alt_module *mod;
@ -368,7 +369,7 @@ void alternatives_smp_switch(int smp)
printk("lockdep: fixing up alternatives.\n");
#endif
if (noreplace_smp || smp_alt_once)
if (noreplace_smp || smp_alt_once || skip_smp_alternatives)
return;
BUG_ON(!smp && (num_online_cpus() > 1));

40
arch/x86/kernel/cpu/mcheck/therm_throt.c
View File

@ -53,8 +53,13 @@ struct thermal_state {
struct _thermal_state core_power_limit;
struct _thermal_state package_throttle;
struct _thermal_state package_power_limit;
struct _thermal_state core_thresh0;
struct _thermal_state core_thresh1;
};
/* Callback to handle core threshold interrupts */
int (*platform_thermal_notify)(__u64 msr_val);
static DEFINE_PER_CPU(struct thermal_state, thermal_state);
static atomic_t therm_throt_en = ATOMIC_INIT(0);
@ -200,6 +205,22 @@ static int therm_throt_process(bool new_event, int event, int level)
return 0;
}
static int thresh_event_valid(int event)
{
struct _thermal_state *state;
unsigned int this_cpu = smp_processor_id();
struct thermal_state *pstate = &per_cpu(thermal_state, this_cpu);
u64 now = get_jiffies_64();
state = (event == 0) ? &pstate->core_thresh0 : &pstate->core_thresh1;
if (time_before64(now, state->next_check))
return 0;
state->next_check = now + CHECK_INTERVAL;
return 1;
}
#ifdef CONFIG_SYSFS
/* Add/Remove thermal_throttle interface for CPU device: */
static __cpuinit int thermal_throttle_add_dev(struct sys_device *sys_dev,
@ -313,6 +334,22 @@ device_initcall(thermal_throttle_init_device);
#define PACKAGE_THROTTLED ((__u64)2 << 62)
#define PACKAGE_POWER_LIMIT ((__u64)3 << 62)
static void notify_thresholds(__u64 msr_val)
{
/* check whether the interrupt handler is defined;
* otherwise simply return
*/
if (!platform_thermal_notify)
return;
/* lower threshold reached */
if ((msr_val & THERM_LOG_THRESHOLD0) && thresh_event_valid(0))
platform_thermal_notify(msr_val);
/* higher threshold reached */
if ((msr_val & THERM_LOG_THRESHOLD1) && thresh_event_valid(1))
platform_thermal_notify(msr_val);
}
/* Thermal transition interrupt handler */
static void intel_thermal_interrupt(void)
{
@ -321,6 +358,9 @@ static void intel_thermal_interrupt(void)
rdmsrl(MSR_IA32_THERM_STATUS, msr_val);
/* Check for violation of core thermal thresholds*/
notify_thresholds(msr_val);
if (therm_throt_process(msr_val & THERM_STATUS_PROCHOT,
THERMAL_THROTTLING_EVENT,
CORE_LEVEL) != 0)

14
arch/x86/kernel/smpboot.c
View File

@ -1161,6 +1161,20 @@ void __init native_smp_prepare_cpus(unsigned int max_cpus)
preempt_enable();
}
void arch_disable_nonboot_cpus_begin(void)
{
/*
* Avoid the smp alternatives switch during the disable_nonboot_cpus().
* In the suspend path, we will be back in the SMP mode shortly anyways.
*/
skip_smp_alternatives = true;
}
void arch_disable_nonboot_cpus_end(void)
{
skip_smp_alternatives = false;
}
void arch_enable_nonboot_cpus_begin(void)
{
set_mtrr_aps_delayed_init();

6
include/linux/interrupt.h
View File

@ -114,15 +114,15 @@ typedef irqreturn_t (*irq_handler_t)(int, void *);
struct irqaction {
irq_handler_t handler;
unsigned long flags;
const char *name;
void *dev_id;
struct irqaction *next;
int irq;
struct proc_dir_entry *dir;
irq_handler_t thread_fn;
struct task_struct *thread;
unsigned long thread_flags;
};
const char *name;
struct proc_dir_entry *dir;
} ____cacheline_internodealigned_in_smp;
extern irqreturn_t no_action(int cpl, void *dev_id);

11
kernel/cpu.c
View File

@ -384,6 +384,14 @@ int __cpuinit cpu_up(unsigned int cpu)
#ifdef CONFIG_PM_SLEEP_SMP
static cpumask_var_t frozen_cpus;
void __weak arch_disable_nonboot_cpus_begin(void)
{
}
void __weak arch_disable_nonboot_cpus_end(void)
{
}
int disable_nonboot_cpus(void)
{
int cpu, first_cpu, error = 0;
@ -395,6 +403,7 @@ int disable_nonboot_cpus(void)
* with the userspace trying to use the CPU hotplug at the same time
*/
cpumask_clear(frozen_cpus);
arch_disable_nonboot_cpus_begin();
printk("Disabling non-boot CPUs ...\n");
for_each_online_cpu(cpu) {
@ -410,6 +419,8 @@ int disable_nonboot_cpus(void)
}
}
arch_disable_nonboot_cpus_end();
if (!error) {
BUG_ON(num_online_cpus() > 1);
/* Make sure the CPUs won't be enabled by someone else */

16
kernel/lockdep_proc.c
View File

@ -494,7 +494,6 @@ static void seq_stats(struct seq_file *m, struct lock_stat_data *data)
namelen += 2;
for (i = 0; i < LOCKSTAT_POINTS; i++) {
char sym[KSYM_SYMBOL_LEN];
char ip[32];
if (class->contention_point[i] == 0)
@ -503,15 +502,13 @@ static void seq_stats(struct seq_file *m, struct lock_stat_data *data)
if (!i)
seq_line(m, '-', 40-namelen, namelen);
sprint_symbol(sym, class->contention_point[i]);
snprintf(ip, sizeof(ip), "[<%p>]",
(void *)class->contention_point[i]);
seq_printf(m, "%40s %14lu %29s %s\n", name,
stats->contention_point[i],
ip, sym);
seq_printf(m, "%40s %14lu %29s %pS\n",
name, stats->contention_point[i],
ip, (void *)class->contention_point[i]);
}
for (i = 0; i < LOCKSTAT_POINTS; i++) {
char sym[KSYM_SYMBOL_LEN];
char ip[32];
if (class->contending_point[i] == 0)
@ -520,12 +517,11 @@ static void seq_stats(struct seq_file *m, struct lock_stat_data *data)
if (!i)
seq_line(m, '-', 40-namelen, namelen);
sprint_symbol(sym, class->contending_point[i]);
snprintf(ip, sizeof(ip), "[<%p>]",
(void *)class->contending_point[i]);
seq_printf(m, "%40s %14lu %29s %s\n", name,
stats->contending_point[i],
ip, sym);
seq_printf(m, "%40s %14lu %29s %pS\n",
name, stats->contending_point[i],
ip, (void *)class->contending_point[i]);
}
if (i) {
seq_puts(m, "\n");