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-rw-r--r--arch/s390/include/asm/cpu_mf.h12
-rw-r--r--arch/s390/include/asm/irq.h2
-rw-r--r--arch/s390/kernel/irq.c23
-rw-r--r--arch/s390/oprofile/hwsampler.c52
4 files changed, 59 insertions, 30 deletions
diff --git a/arch/s390/include/asm/cpu_mf.h b/arch/s390/include/asm/cpu_mf.h
new file mode 100644
index 000000000000..d91dd38112de
--- /dev/null
+++ b/arch/s390/include/asm/cpu_mf.h
@@ -0,0 +1,12 @@
+#ifndef _ASM_S390_CPU_MF_H
+#define _ASM_S390_CPU_MF_H
+
+#define CPU_MF_INT_SF_MASK 0xffc00000
+
+#define CPU_MF_INT_SF_IAE (1 << 31) /* invalid entry address */
+#define CPU_MF_INT_SF_ISE (1 << 30) /* incorrect SDBT entry */
+#define CPU_MF_INT_SF_PRA (1 << 29) /* program request alert */
+#define CPU_MF_INT_SF_SACA (1 << 23) /* sampler auth. change alert */
+#define CPU_MF_INT_SF_LSDA (1 << 22) /* loss of sample data alert */
+
+#endif
diff --git a/arch/s390/include/asm/irq.h b/arch/s390/include/asm/irq.h
index acee1806f61e..5289cacd4861 100644
--- a/arch/s390/include/asm/irq.h
+++ b/arch/s390/include/asm/irq.h
@@ -45,5 +45,7 @@ int register_external_interrupt(u16 code, ext_int_handler_t handler);
int unregister_external_interrupt(u16 code, ext_int_handler_t handler);
void service_subclass_irq_register(void);
void service_subclass_irq_unregister(void);
+void measurement_alert_subclass_register(void);
+void measurement_alert_subclass_unregister(void);
#endif /* _ASM_IRQ_H */
diff --git a/arch/s390/kernel/irq.c b/arch/s390/kernel/irq.c
index 2429ecd68872..1c2cdd59ccd0 100644
--- a/arch/s390/kernel/irq.c
+++ b/arch/s390/kernel/irq.c
@@ -255,3 +255,26 @@ void service_subclass_irq_unregister(void)
spin_unlock(&sc_irq_lock);
}
EXPORT_SYMBOL(service_subclass_irq_unregister);
+
+static DEFINE_SPINLOCK(ma_subclass_lock);
+static int ma_subclass_refcount;
+
+void measurement_alert_subclass_register(void)
+{
+ spin_lock(&ma_subclass_lock);
+ if (!ma_subclass_refcount)
+ ctl_set_bit(0, 5);
+ ma_subclass_refcount++;
+ spin_unlock(&ma_subclass_lock);
+}
+EXPORT_SYMBOL(measurement_alert_subclass_register);
+
+void measurement_alert_subclass_unregister(void)
+{
+ spin_lock(&ma_subclass_lock);
+ ma_subclass_refcount--;
+ if (!ma_subclass_refcount)
+ ctl_clear_bit(0, 5);
+ spin_unlock(&ma_subclass_lock);
+}
+EXPORT_SYMBOL(measurement_alert_subclass_unregister);
diff --git a/arch/s390/oprofile/hwsampler.c b/arch/s390/oprofile/hwsampler.c
index 12bea05a0fc1..f097d516d8c5 100644
--- a/arch/s390/oprofile/hwsampler.c
+++ b/arch/s390/oprofile/hwsampler.c
@@ -17,8 +17,7 @@
#include <linux/semaphore.h>
#include <linux/oom.h>
#include <linux/oprofile.h>
-
-#include <asm/lowcore.h>
+#include <asm/cpu_mf.h>
#include <asm/irq.h>
#include "hwsampler.h"
@@ -30,12 +29,6 @@
#define ALERT_REQ_MASK 0x4000000000000000ul
#define BUFFER_FULL_MASK 0x8000000000000000ul
-#define EI_IEA (1 << 31) /* invalid entry address */
-#define EI_ISE (1 << 30) /* incorrect SDBT entry */
-#define EI_PRA (1 << 29) /* program request alert */
-#define EI_SACA (1 << 23) /* sampler authorization change alert */
-#define EI_LSDA (1 << 22) /* loss of sample data alert */
-
DECLARE_PER_CPU(struct hws_cpu_buffer, sampler_cpu_buffer);
struct hws_execute_parms {
@@ -232,9 +225,20 @@ static inline unsigned long *trailer_entry_ptr(unsigned long v)
return (unsigned long *) ret;
}
-/* prototypes for external interrupt handler and worker */
static void hws_ext_handler(struct ext_code ext_code,
- unsigned int param32, unsigned long param64);
+ unsigned int param32, unsigned long param64)
+{
+ struct hws_cpu_buffer *cb = &__get_cpu_var(sampler_cpu_buffer);
+
+ if (!(param32 & CPU_MF_INT_SF_MASK))
+ return;
+
+ kstat_cpu(smp_processor_id()).irqs[EXTINT_CPM]++;
+ atomic_xchg(&cb->ext_params, atomic_read(&cb->ext_params) | param32);
+
+ if (hws_wq)
+ queue_work(hws_wq, &cb->worker);
+}
static void worker(struct work_struct *work);
@@ -673,18 +677,6 @@ int hwsampler_activate(unsigned int cpu)
return rc;
}
-static void hws_ext_handler(struct ext_code ext_code,
- unsigned int param32, unsigned long param64)
-{
- struct hws_cpu_buffer *cb;
-
- kstat_cpu(smp_processor_id()).irqs[EXTINT_CPM]++;
- cb = &__get_cpu_var(sampler_cpu_buffer);
- atomic_xchg(&cb->ext_params, atomic_read(&cb->ext_params) | param32);
- if (hws_wq)
- queue_work(hws_wq, &cb->worker);
-}
-
static int check_qsi_on_setup(void)
{
int rc;
@@ -760,23 +752,23 @@ static int worker_check_error(unsigned int cpu, int ext_params)
if (!sdbt || !*sdbt)
return -EINVAL;
- if (ext_params & EI_PRA)
+ if (ext_params & CPU_MF_INT_SF_PRA)
cb->req_alert++;
- if (ext_params & EI_LSDA)
+ if (ext_params & CPU_MF_INT_SF_LSDA)
cb->loss_of_sample_data++;
- if (ext_params & EI_IEA) {
+ if (ext_params & CPU_MF_INT_SF_IAE) {
cb->invalid_entry_address++;
rc = -EINVAL;
}
- if (ext_params & EI_ISE) {
+ if (ext_params & CPU_MF_INT_SF_ISE) {
cb->incorrect_sdbt_entry++;
rc = -EINVAL;
}
- if (ext_params & EI_SACA) {
+ if (ext_params & CPU_MF_INT_SF_SACA) {
cb->sample_auth_change_alert++;
rc = -EINVAL;
}
@@ -1009,7 +1001,7 @@ int hwsampler_deallocate(void)
if (hws_state != HWS_STOPPED)
goto deallocate_exit;
- ctl_clear_bit(0, 5); /* set bit 58 CR0 off */
+ measurement_alert_subclass_unregister();
deallocate_sdbt();
hws_state = HWS_DEALLOCATED;
@@ -1123,7 +1115,7 @@ int hwsampler_shutdown(void)
mutex_lock(&hws_sem);
if (hws_state == HWS_STOPPED) {
- ctl_clear_bit(0, 5); /* set bit 58 CR0 off */
+ measurement_alert_subclass_unregister();
deallocate_sdbt();
}
if (hws_wq) {
@@ -1198,7 +1190,7 @@ start_all_exit:
hws_oom = 1;
hws_flush_all = 0;
/* now let them in, 1407 CPUMF external interrupts */
- ctl_set_bit(0, 5); /* set CR0 bit 58 */
+ measurement_alert_subclass_register();
return 0;
}
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