From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/arch/sparc/oprofile/Makefile | 9 ++++ kernel/arch/sparc/oprofile/init.c | 87 +++++++++++++++++++++++++++++++++++++ 2 files changed, 96 insertions(+) create mode 100644 kernel/arch/sparc/oprofile/Makefile create mode 100644 kernel/arch/sparc/oprofile/init.c (limited to 'kernel/arch/sparc/oprofile') diff --git a/kernel/arch/sparc/oprofile/Makefile b/kernel/arch/sparc/oprofile/Makefile new file mode 100644 index 000000000..e9feca1ca --- /dev/null +++ b/kernel/arch/sparc/oprofile/Makefile @@ -0,0 +1,9 @@ +obj-$(CONFIG_OPROFILE) += oprofile.o + +DRIVER_OBJS = $(addprefix ../../../drivers/oprofile/, \ + oprof.o cpu_buffer.o buffer_sync.o \ + event_buffer.o oprofile_files.o \ + oprofilefs.o oprofile_stats.o \ + timer_int.o ) + +oprofile-y := $(DRIVER_OBJS) init.o diff --git a/kernel/arch/sparc/oprofile/init.c b/kernel/arch/sparc/oprofile/init.c new file mode 100644 index 000000000..f9024bccf --- /dev/null +++ b/kernel/arch/sparc/oprofile/init.c @@ -0,0 +1,87 @@ +/** + * @file init.c + * + * @remark Copyright 2002 OProfile authors + * @remark Read the file COPYING + * + * @author John Levon + */ + +#include +#include +#include +#include +#include /* for HZ */ + +#ifdef CONFIG_SPARC64 +#include +#include +#include +#include + +static int profile_timer_exceptions_notify(struct notifier_block *self, + unsigned long val, void *data) +{ + struct die_args *args = data; + int ret = NOTIFY_DONE; + + switch (val) { + case DIE_NMI: + oprofile_add_sample(args->regs, 0); + ret = NOTIFY_STOP; + break; + default: + break; + } + return ret; +} + +static struct notifier_block profile_timer_exceptions_nb = { + .notifier_call = profile_timer_exceptions_notify, +}; + +static int timer_start(void) +{ + if (register_die_notifier(&profile_timer_exceptions_nb)) + return 1; + nmi_adjust_hz(HZ); + return 0; +} + + +static void timer_stop(void) +{ + nmi_adjust_hz(1); + unregister_die_notifier(&profile_timer_exceptions_nb); + synchronize_sched(); /* Allow already-started NMIs to complete. */ +} + +static int op_nmi_timer_init(struct oprofile_operations *ops) +{ + if (atomic_read(&nmi_active) <= 0) + return -ENODEV; + + ops->start = timer_start; + ops->stop = timer_stop; + ops->cpu_type = "timer"; + printk(KERN_INFO "oprofile: Using perfctr NMI timer interrupt.\n"); + return 0; +} +#endif + +int __init oprofile_arch_init(struct oprofile_operations *ops) +{ + int ret = -ENODEV; + +#ifdef CONFIG_SPARC64 + ret = op_nmi_timer_init(ops); + if (!ret) + return ret; +#endif + + return ret; +} + +void oprofile_arch_exit(void) +{ +} -- cgit 1.2.3-korg