[PATCH 15/22] 2.6.22-rc3 perfmon2 : modified i386 files

From: Stephane Eranian
Date: Tue May 29 2007 - 10:09:01 EST

This patch contains the modified i386 files


Modified files are as follows:

arch/i386/Kconfig:
- add link to configuration menu in arch/i386/perfmon/Kconfig

arch/i386/Makefile:
- add perfmon subdir

arch/i386/kernel/apic.c:
- add hook to call pfm_handle_switch_timeout() on timer tick for timeout based
set multiplexing

arch/i386/kernel/i8259.c:
- PMU interrupt vector gate initialization

arch/i386/kernel/process.c:
- add hook in exit_thread() to cleanup perfmon2 context
- add hook in copy_thread() to cleanup perfmon2 context in child (perfmon2 context
is never inherited)
- add hook in __switch_to() for PMU state save/restore

arch/i386/kernel/signal.c:
- add hook for extra work before kernel exit. Need to block a thread after a overflow with
user level notification. Also needed to do some bookeeeping, such as reset certain counters
and cleanup in some difficult corner cases

arch/i386/kernel/syscall_table.S:
- add new perfmon2 system calls

include/asm-i386/mach-default/entry_arch.h:
- add pmu_interrupt stub

include/asm-i386/mach-default/irq_vectors.h:
- define PMU interrupt vector

include/asm-i386/thread_info.h:
- add TIF_PERFMON which is used for PMU context switching in __switch_to()

include/asm-i386/unistd.h:
- add new system calls





diff --exclude=.git -urp linux-2.6.22.base/arch/i386/Kconfig linux-2.6.22/arch/i386/Kconfig
--- linux-2.6.22.base/arch/i386/Kconfig 2007-05-29 03:17:15.000000000 -0700
+++ linux-2.6.22/arch/i386/Kconfig 2007-05-29 03:24:14.000000000 -0700
@@ -910,6 +910,8 @@ config COMPAT_VDSO

If unsure, say Y.

+source "arch/i386/perfmon/Kconfig"
+
endmenu

config ARCH_ENABLE_MEMORY_HOTPLUG
diff --exclude=.git -urp linux-2.6.22.base/arch/i386/Makefile linux-2.6.22/arch/i386/Makefile
--- linux-2.6.22.base/arch/i386/Makefile 2007-05-29 03:17:15.000000000 -0700
+++ linux-2.6.22/arch/i386/Makefile 2007-05-29 03:24:14.000000000 -0700
@@ -99,6 +99,7 @@ mflags-y += -Iinclude/asm-i386/mach-defa
head-y := arch/i386/kernel/head.o arch/i386/kernel/init_task.o

libs-y += arch/i386/lib/
+core-$(CONFIG_PERFMON) += arch/i386/perfmon/
core-y += arch/i386/kernel/ \
arch/i386/mm/ \
arch/i386/$(mcore-y)/ \
diff --exclude=.git -urp linux-2.6.22.base/arch/i386/kernel/apic.c linux-2.6.22/arch/i386/kernel/apic.c
--- linux-2.6.22.base/arch/i386/kernel/apic.c 2007-05-29 03:17:15.000000000 -0700
+++ linux-2.6.22/arch/i386/kernel/apic.c 2007-05-29 03:24:14.000000000 -0700
@@ -28,6 +28,7 @@
#include <linux/acpi_pmtmr.h>
#include <linux/module.h>
#include <linux/dmi.h>
+#include <linux/perfmon.h>

#include <asm/atomic.h>
#include <asm/smp.h>
@@ -562,6 +563,8 @@ static void local_apic_timer_interrupt(v
per_cpu(irq_stat, cpu).apic_timer_irqs++;

evt->event_handler(evt);
+
+ pfm_handle_switch_timeout();
}

/*
@@ -1325,6 +1328,9 @@ void __init apic_intr_init(void)
#ifdef CONFIG_X86_MCE_P4THERMAL
set_intr_gate(THERMAL_APIC_VECTOR, thermal_interrupt);
#endif
+#ifdef CONFIG_PERFMON
+ set_intr_gate(LOCAL_PERFMON_VECTOR, pmu_interrupt);
+#endif
}

/**
diff --exclude=.git -urp linux-2.6.22.base/arch/i386/kernel/cpu/common.c linux-2.6.22/arch/i386/kernel/cpu/common.c
--- linux-2.6.22.base/arch/i386/kernel/cpu/common.c 2007-05-29 03:17:15.000000000 -0700
+++ linux-2.6.22/arch/i386/kernel/cpu/common.c 2007-05-29 03:24:14.000000000 -0700
@@ -5,6 +5,7 @@
#include <linux/module.h>
#include <linux/percpu.h>
#include <linux/bootmem.h>
+#include <linux/perfmon.h>
#include <asm/semaphore.h>
#include <asm/processor.h>
#include <asm/i387.h>
@@ -718,6 +719,8 @@ void __cpuinit cpu_init(void)
current_thread_info()->status = 0;
clear_used_math();
mxcsr_feature_mask_init();
+
+ pfm_init_percpu();
}

#ifdef CONFIG_HOTPLUG_CPU
diff --exclude=.git -urp linux-2.6.22.base/arch/i386/kernel/entry.S linux-2.6.22/arch/i386/kernel/entry.S
--- linux-2.6.22.base/arch/i386/kernel/entry.S 2007-05-29 03:17:15.000000000 -0700
+++ linux-2.6.22/arch/i386/kernel/entry.S 2007-05-29 03:24:14.000000000 -0700
@@ -465,7 +465,7 @@ ENDPROC(system_call)
ALIGN
RING0_PTREGS_FRAME # can't unwind into user space anyway
work_pending:
- testb $_TIF_NEED_RESCHED, %cl
+ testw $(_TIF_NEED_RESCHED|_TIF_PERFMON_WORK), %cx
jz work_notifysig
work_resched:
call schedule
diff --exclude=.git -urp linux-2.6.22.base/arch/i386/kernel/process.c linux-2.6.22/arch/i386/kernel/process.c
--- linux-2.6.22.base/arch/i386/kernel/process.c 2007-05-29 03:17:15.000000000 -0700
+++ linux-2.6.22/arch/i386/kernel/process.c 2007-05-29 03:24:14.000000000 -0700
@@ -31,6 +31,7 @@
#include <linux/delay.h>
#include <linux/reboot.h>
#include <linux/init.h>
+#include <linux/perfmon.h>
#include <linux/mc146818rtc.h>
#include <linux/module.h>
#include <linux/kallsyms.h>
@@ -384,6 +385,7 @@ void exit_thread(void)
tss->x86_tss.io_bitmap_base = INVALID_IO_BITMAP_OFFSET;
put_cpu();
}
+ pfm_exit_thread(current);
}

void flush_thread(void)
@@ -435,6 +437,8 @@ int copy_thread(int nr, unsigned long cl

savesegment(gs,p->thread.gs);

+ pfm_copy_thread(p);
+
tsk = current;
if (unlikely(test_tsk_thread_flag(tsk, TIF_IO_BITMAP))) {
p->thread.io_bitmap_ptr = kmemdup(tsk->thread.io_bitmap_ptr,
@@ -538,8 +542,9 @@ int dump_task_regs(struct task_struct *t
return 1;
}

-static noinline void __switch_to_xtra(struct task_struct *next_p,
- struct tss_struct *tss)
+static noinline void __switch_to_xtra(struct task_struct *prev_p,
+ struct task_struct *next_p,
+ struct tss_struct *tss)
{
struct thread_struct *next;

@@ -555,6 +560,10 @@ static noinline void __switch_to_xtra(st
set_debugreg(next->debugreg[7], 7);
}

+ if (test_tsk_thread_flag(next_p, TIF_PERFMON_CTXSW)
+ || test_tsk_thread_flag(prev_p, TIF_PERFMON_CTXSW))
+ pfm_ctxsw(prev_p, next_p);
+
if (!test_tsk_thread_flag(next_p, TIF_IO_BITMAP)) {
/*
* Disable the bitmap via an invalid offset. We still cache
@@ -690,8 +699,8 @@ struct task_struct fastcall * __switch_t
* Now maybe handle debug registers and/or IO bitmaps
*/
if (unlikely((task_thread_info(next_p)->flags & _TIF_WORK_CTXSW)
- || test_tsk_thread_flag(prev_p, TIF_IO_BITMAP)))
- __switch_to_xtra(next_p, tss);
+ || (task_thread_info(prev_p)->flags & _TIF_WORK_CTXSW)))
+ __switch_to_xtra(prev_p, next_p, tss);

disable_tsc(prev_p, next_p);

diff --exclude=.git -urp linux-2.6.22.base/arch/i386/kernel/signal.c linux-2.6.22/arch/i386/kernel/signal.c
--- linux-2.6.22.base/arch/i386/kernel/signal.c 2007-05-29 03:17:15.000000000 -0700
+++ linux-2.6.22/arch/i386/kernel/signal.c 2007-05-29 03:24:14.000000000 -0700
@@ -21,6 +21,7 @@
#include <linux/ptrace.h>
#include <linux/elf.h>
#include <linux/binfmts.h>
+#include <linux/perfmon.h>
#include <asm/processor.h>
#include <asm/ucontext.h>
#include <asm/uaccess.h>
@@ -652,6 +653,10 @@ void do_notify_resume(struct pt_regs *re
clear_thread_flag(TIF_SINGLESTEP);
}

+ /* process perfmon asynchronous work (e.g. block thread or reset) */
+ if (thread_info_flags & _TIF_PERFMON_WORK)
+ pfm_handle_work(regs);
+
/* deal with pending signal delivery */
if (thread_info_flags & (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK))
do_signal(regs);
diff --exclude=.git -urp linux-2.6.22.base/arch/i386/kernel/smpboot.c linux-2.6.22/arch/i386/kernel/smpboot.c
--- linux-2.6.22.base/arch/i386/kernel/smpboot.c 2007-05-29 03:17:15.000000000 -0700
+++ linux-2.6.22/arch/i386/kernel/smpboot.c 2007-05-29 03:24:14.000000000 -0700
@@ -45,6 +45,7 @@
#include <linux/cpu.h>
#include <linux/percpu.h>
#include <linux/nmi.h>
+#include <linux/perfmon.h>

#include <linux/delay.h>
#include <linux/mc146818rtc.h>
@@ -1208,6 +1209,7 @@ int __cpu_disable(void)

cpu_clear(cpu, map);
fixup_irqs(map);
+ pfm_cpu_disable();
/* It's now safe to remove this processor from the online map */
cpu_clear(cpu, cpu_online_map);
return 0;
diff --exclude=.git -urp linux-2.6.22.base/arch/i386/kernel/syscall_table.S linux-2.6.22/arch/i386/kernel/syscall_table.S
--- linux-2.6.22.base/arch/i386/kernel/syscall_table.S 2007-05-29 03:17:15.000000000 -0700
+++ linux-2.6.22/arch/i386/kernel/syscall_table.S 2007-05-29 03:24:14.000000000 -0700
@@ -323,3 +323,15 @@ ENTRY(sys_call_table)
.long sys_signalfd
.long sys_timerfd
.long sys_eventfd
+ .long sys_pfm_create_context
+ .long sys_pfm_write_pmcs /* 325 */
+ .long sys_pfm_write_pmds
+ .long sys_pfm_read_pmds
+ .long sys_pfm_load_context
+ .long sys_pfm_start
+ .long sys_pfm_stop /* 330 */
+ .long sys_pfm_restart
+ .long sys_pfm_create_evtsets
+ .long sys_pfm_getinfo_evtsets
+ .long sys_pfm_delete_evtsets
+ .long sys_pfm_unload_context /* 335 */
diff --exclude=.git -urp linux-2.6.22.base/arch/i386/oprofile/Makefile linux-2.6.22/arch/i386/oprofile/Makefile
--- linux-2.6.22.base/arch/i386/oprofile/Makefile 2007-05-29 03:17:15.000000000 -0700
+++ linux-2.6.22/arch/i386/oprofile/Makefile 2007-05-29 03:24:14.000000000 -0700
@@ -10,3 +10,4 @@ oprofile-y := $(DRIVER_OBJS) init.o b
oprofile-$(CONFIG_X86_LOCAL_APIC) += nmi_int.o op_model_athlon.o \
op_model_ppro.o op_model_p4.o
oprofile-$(CONFIG_X86_IO_APIC) += nmi_timer_int.o
+oprofile-$(CONFIG_PERFMON) += perfmon.o
diff --exclude=.git -urp linux-2.6.22.base/arch/i386/oprofile/init.c linux-2.6.22/arch/i386/oprofile/init.c
--- linux-2.6.22.base/arch/i386/oprofile/init.c 2007-05-29 03:17:15.000000000 -0700
+++ linux-2.6.22/arch/i386/oprofile/init.c 2007-05-29 03:24:14.000000000 -0700
@@ -15,9 +15,11 @@
* with the NMI mode driver.
*/

+extern int op_perfmon_init(struct oprofile_operations * ops);
extern int op_nmi_init(struct oprofile_operations * ops);
extern int op_nmi_timer_init(struct oprofile_operations * ops);
extern void op_nmi_exit(void);
+extern void op_perfmon_exit(void);
extern void x86_backtrace(struct pt_regs * const regs, unsigned int depth);


@@ -27,8 +29,12 @@ int __init oprofile_arch_init(struct opr

ret = -ENODEV;

+#ifdef CONFIG_PERFMON
+ ret = op_perfmon_init(ops);
+#endif
#ifdef CONFIG_X86_LOCAL_APIC
- ret = op_nmi_init(ops);
+ if (ret < 0)
+ ret = op_nmi_init(ops);
#endif
#ifdef CONFIG_X86_IO_APIC
if (ret < 0)
@@ -42,6 +48,9 @@ int __init oprofile_arch_init(struct opr

void oprofile_arch_exit(void)
{
+#ifdef CONFIG_PERFMON
+ op_perfmon_exit();
+#endif
#ifdef CONFIG_X86_LOCAL_APIC
op_nmi_exit();
#endif
diff --exclude=.git -urp linux-2.6.22.base/arch/i386/oprofile/nmi_int.c linux-2.6.22/arch/i386/oprofile/nmi_int.c
--- linux-2.6.22.base/arch/i386/oprofile/nmi_int.c 2007-05-29 03:17:15.000000000 -0700
+++ linux-2.6.22/arch/i386/oprofile/nmi_int.c 2007-05-29 03:24:14.000000000 -0700
@@ -459,6 +459,7 @@ int __init op_nmi_init(struct oprofile_o
ops->start = nmi_start;
ops->stop = nmi_stop;
ops->cpu_type = cpu_type;
+ ops->implementation = "oprofile";
printk(KERN_INFO "oprofile: using NMI interrupt.\n");
return 0;
}
diff --exclude=.git -urp linux-2.6.22.base/arch/i386/oprofile/nmi_timer_int.c linux-2.6.22/arch/i386/oprofile/nmi_timer_int.c
--- linux-2.6.22.base/arch/i386/oprofile/nmi_timer_int.c 2007-05-29 03:17:15.000000000 -0700
+++ linux-2.6.22/arch/i386/oprofile/nmi_timer_int.c 2007-05-29 03:24:14.000000000 -0700
@@ -64,6 +64,7 @@ int __init op_nmi_timer_init(struct opro
ops->start = timer_start;
ops->stop = timer_stop;
ops->cpu_type = "timer";
+ ops->implementation = "nmi_timer";
printk(KERN_INFO "oprofile: using NMI timer interrupt.\n");
return 0;
}
Only in linux-2.6.22/arch/i386/oprofile: perfmon.c
Only in linux-2.6.22/arch/i386: perfmon
diff --exclude=.git -urp linux-2.6.22.base/include/asm-i386/mach-default/entry_arch.h linux-2.6.22/include/asm-i386/mach-default/entry_arch.h
--- linux-2.6.22.base/include/asm-i386/mach-default/entry_arch.h 2007-05-29 03:17:41.000000000 -0700
+++ linux-2.6.22/include/asm-i386/mach-default/entry_arch.h 2007-05-29 03:24:14.000000000 -0700
@@ -31,4 +31,8 @@ BUILD_INTERRUPT(spurious_interrupt,SPURI
BUILD_INTERRUPT(thermal_interrupt,THERMAL_APIC_VECTOR)
#endif

+#ifdef CONFIG_PERFMON
+BUILD_INTERRUPT(pmu_interrupt,LOCAL_PERFMON_VECTOR)
+#endif
+
#endif
diff --exclude=.git -urp linux-2.6.22.base/include/asm-i386/mach-default/irq_vectors.h linux-2.6.22/include/asm-i386/mach-default/irq_vectors.h
--- linux-2.6.22.base/include/asm-i386/mach-default/irq_vectors.h 2007-05-29 03:17:41.000000000 -0700
+++ linux-2.6.22/include/asm-i386/mach-default/irq_vectors.h 2007-05-29 03:24:14.000000000 -0700
@@ -56,6 +56,7 @@
* sources per level' errata.
*/
#define LOCAL_TIMER_VECTOR 0xef
+#define LOCAL_PERFMON_VECTOR 0xee

/*
* First APIC vector available to drivers: (vectors 0x30-0xee)
@@ -63,7 +64,7 @@
* levels. (0x80 is the syscall vector)
*/
#define FIRST_DEVICE_VECTOR 0x31
-#define FIRST_SYSTEM_VECTOR 0xef
+#define FIRST_SYSTEM_VECTOR 0xee

#define TIMER_IRQ 0

Only in linux-2.6.22/include/asm-i386: perfmon.h
Only in linux-2.6.22/include/asm-i386: perfmon_api.h
Only in linux-2.6.22/include/asm-i386: perfmon_pebs_smpl.h
diff --exclude=.git -urp linux-2.6.22.base/include/asm-i386/thread_info.h linux-2.6.22/include/asm-i386/thread_info.h
--- linux-2.6.22.base/include/asm-i386/thread_info.h 2007-05-29 03:20:21.000000000 -0700
+++ linux-2.6.22/include/asm-i386/thread_info.h 2007-05-29 03:24:14.000000000 -0700
@@ -132,10 +132,12 @@ static inline struct thread_info *curren
#define TIF_SYSCALL_AUDIT 6 /* syscall auditing active */
#define TIF_SECCOMP 7 /* secure computing */
#define TIF_RESTORE_SIGMASK 8 /* restore signal mask in do_signal() */
+#define TIF_PERFMON_WORK 9 /* work for pfm_handle_work() */
#define TIF_MEMDIE 16
#define TIF_DEBUG 17 /* uses debug registers */
#define TIF_IO_BITMAP 18 /* uses I/O bitmap */
#define TIF_FREEZE 19 /* is freezing for suspend */
+#define TIF_PERFMON_CTXSW 20 /* perfmon needs ctxsw calls */

#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
@@ -149,6 +151,8 @@ static inline struct thread_info *curren
#define _TIF_DEBUG (1<<TIF_DEBUG)
#define _TIF_IO_BITMAP (1<<TIF_IO_BITMAP)
#define _TIF_FREEZE (1<<TIF_FREEZE)
+#define _TIF_PERFMON_WORK (1<<TIF_PERFMON_WORK)
+#define _TIF_PERFMON_CTXSW (1<<TIF_PERFMON_CTXSW)

/* work to do on interrupt/exception return */
#define _TIF_WORK_MASK \
@@ -158,7 +162,7 @@ static inline struct thread_info *curren
#define _TIF_ALLWORK_MASK (0x0000FFFF & ~_TIF_SECCOMP)

/* flags to check in __switch_to() */
-#define _TIF_WORK_CTXSW (_TIF_DEBUG|_TIF_IO_BITMAP)
+#define _TIF_WORK_CTXSW (_TIF_DEBUG|_TIF_IO_BITMAP|_TIF_PERFMON_CTXSW)

/*
* Thread-synchronous status.
diff --exclude=.git -urp linux-2.6.22.base/include/asm-i386/unistd.h linux-2.6.22/include/asm-i386/unistd.h
--- linux-2.6.22.base/include/asm-i386/unistd.h 2007-05-29 03:17:41.000000000 -0700
+++ linux-2.6.22/include/asm-i386/unistd.h 2007-05-29 03:24:14.000000000 -0700
@@ -329,10 +329,22 @@
#define __NR_signalfd 321
#define __NR_timerfd 322
#define __NR_eventfd 323
+#define __NR_pfm_create_context 324
+#define __NR_pfm_write_pmcs (__NR_pfm_create_context+1)
+#define __NR_pfm_write_pmds (__NR_pfm_create_context+2)
+#define __NR_pfm_read_pmds (__NR_pfm_create_context+3)
+#define __NR_pfm_load_context (__NR_pfm_create_context+4)
+#define __NR_pfm_start (__NR_pfm_create_context+5)
+#define __NR_pfm_stop (__NR_pfm_create_context+6)
+#define __NR_pfm_restart (__NR_pfm_create_context+7)
+#define __NR_pfm_create_evtsets (__NR_pfm_create_context+8)
+#define __NR_pfm_getinfo_evtsets (__NR_pfm_create_context+9)
+#define __NR_pfm_delete_evtsets (__NR_pfm_create_context+10)
+#define __NR_pfm_unload_context (__NR_pfm_create_context+11)

#ifdef __KERNEL__

-#define NR_syscalls 324
+#define NR_syscalls 335

#define __ARCH_WANT_IPC_PARSE_VERSION
#define __ARCH_WANT_OLD_READDIR
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/