summaryrefslogtreecommitdiff
path: root/arch/s390/kernel/runtime_instr.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/s390/kernel/runtime_instr.c')
-rw-r--r--arch/s390/kernel/runtime_instr.c64
1 files changed, 3 insertions, 61 deletions
diff --git a/arch/s390/kernel/runtime_instr.c b/arch/s390/kernel/runtime_instr.c
index 26b4ae96fdd7..fffa0e5462af 100644
--- a/arch/s390/kernel/runtime_instr.c
+++ b/arch/s390/kernel/runtime_instr.c
@@ -18,11 +18,6 @@
/* empty control block to disable RI by loading it */
struct runtime_instr_cb runtime_instr_empty_cb;
-static int runtime_instr_avail(void)
-{
- return test_facility(64);
-}
-
static void disable_runtime_instr(void)
{
struct pt_regs *regs = task_pt_regs(current);
@@ -40,7 +35,6 @@ static void disable_runtime_instr(void)
static void init_runtime_instr_cb(struct runtime_instr_cb *cb)
{
cb->buf_limit = 0xfff;
- cb->int_requested = 1;
cb->pstate = 1;
cb->pstate_set_buf = 1;
cb->pstate_sample = 1;
@@ -57,46 +51,14 @@ void exit_thread_runtime_instr(void)
return;
disable_runtime_instr();
kfree(task->thread.ri_cb);
- task->thread.ri_signum = 0;
task->thread.ri_cb = NULL;
}
-static void runtime_instr_int_handler(struct ext_code ext_code,
- unsigned int param32, unsigned long param64)
-{
- struct siginfo info;
-
- if (!(param32 & CPU_MF_INT_RI_MASK))
- return;
-
- inc_irq_stat(IRQEXT_CMR);
-
- if (!current->thread.ri_cb)
- return;
- if (current->thread.ri_signum < SIGRTMIN ||
- current->thread.ri_signum > SIGRTMAX) {
- WARN_ON_ONCE(1);
- return;
- }
-
- memset(&info, 0, sizeof(info));
- info.si_signo = current->thread.ri_signum;
- info.si_code = SI_QUEUE;
- if (param32 & CPU_MF_INT_RI_BUF_FULL)
- info.si_int = ENOBUFS;
- else if (param32 & CPU_MF_INT_RI_HALTED)
- info.si_int = ECANCELED;
- else
- return; /* unknown reason */
-
- send_sig_info(current->thread.ri_signum, &info, current);
-}
-
-SYSCALL_DEFINE2(s390_runtime_instr, int, command, int, signum)
+SYSCALL_DEFINE1(s390_runtime_instr, int, command)
{
struct runtime_instr_cb *cb;
- if (!runtime_instr_avail())
+ if (!test_facility(64))
return -EOPNOTSUPP;
if (command == S390_RUNTIME_INSTR_STOP) {
@@ -106,8 +68,7 @@ SYSCALL_DEFINE2(s390_runtime_instr, int, command, int, signum)
return 0;
}
- if (command != S390_RUNTIME_INSTR_START ||
- (signum < SIGRTMIN || signum > SIGRTMAX))
+ if (command != S390_RUNTIME_INSTR_START)
return -EINVAL;
if (!current->thread.ri_cb) {
@@ -120,7 +81,6 @@ SYSCALL_DEFINE2(s390_runtime_instr, int, command, int, signum)
}
init_runtime_instr_cb(cb);
- current->thread.ri_signum = signum;
/* now load the control block to make it available */
preempt_disable();
@@ -129,21 +89,3 @@ SYSCALL_DEFINE2(s390_runtime_instr, int, command, int, signum)
preempt_enable();
return 0;
}
-
-static int __init runtime_instr_init(void)
-{
- int rc;
-
- if (!runtime_instr_avail())
- return 0;
-
- irq_subclass_register(IRQ_SUBCLASS_MEASUREMENT_ALERT);
- rc = register_external_irq(EXT_IRQ_MEASURE_ALERT,
- runtime_instr_int_handler);
- if (rc)
- irq_subclass_unregister(IRQ_SUBCLASS_MEASUREMENT_ALERT);
- else
- pr_info("Runtime instrumentation facility initialized\n");
- return rc;
-}
-device_initcall(runtime_instr_init);