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Subject[PATCH 15/21] 2.6.19 perfmon2 : modified i386 files
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-2.6.19.base/arch/i386/Kconfig linux-2.6.19/arch/i386/Kconfig
--- linux-2.6.19.base/arch/i386/Kconfig 2006-11-29 13:57:37.000000000 -0800
+++ linux-2.6.19/arch/i386/Kconfig 2006-12-03 14:15:47.000000000 -0800
@@ -814,6 +814,8 @@ config COMPAT_VDSO

If unsure, say Y.

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

config ARCH_ENABLE_MEMORY_HOTPLUG
diff --exclude=.git -urp linux-2.6.19.base/arch/i386/Makefile linux-2.6.19/arch/i386/Makefile
--- linux-2.6.19.base/arch/i386/Makefile 2006-11-29 13:57:37.000000000 -0800
+++ linux-2.6.19/arch/i386/Makefile 2006-12-03 14:15:47.000000000 -0800
@@ -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-2.6.19.base/arch/i386/kernel/apic.c linux-2.6.19/arch/i386/kernel/apic.c
--- linux-2.6.19.base/arch/i386/kernel/apic.c 2006-12-03 14:24:40.000000000 -0800
+++ linux-2.6.19/arch/i386/kernel/apic.c 2006-12-03 14:15:47.000000000 -0800
@@ -26,6 +26,7 @@
#include <linux/sysdev.h>
#include <linux/cpu.h>
#include <linux/module.h>
+#include <linux/perfmon.h>

#include <asm/atomic.h>
#include <asm/smp.h>
@@ -122,6 +123,9 @@ 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
}

/* Using APIC to generate smp_local_timer_interrupt? */
@@ -1201,6 +1205,8 @@ inline void smp_local_timer_interrupt(vo
update_process_times(user_mode_vm(get_irq_regs()));
#endif

+ pfm_handle_switch_timeout();
+
/*
* We take the 'long' return path, and there every subsystem
* grabs the apropriate locks (kernel lock/ irq lock).
diff --exclude=.git -urp linux-2.6.19.base/arch/i386/kernel/cpu/common.c linux-2.6.19/arch/i386/kernel/cpu/common.c
--- linux-2.6.19.base/arch/i386/kernel/cpu/common.c 2006-11-29 13:57:37.000000000 -0800
+++ linux-2.6.19/arch/i386/kernel/cpu/common.c 2006-12-03 14:15:47.000000000 -0800
@@ -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>
@@ -699,6 +700,8 @@ old_gdt:
current_thread_info()->status = 0;
clear_used_math();
mxcsr_feature_mask_init();
+
+ pfm_init_percpu();
}

#ifdef CONFIG_HOTPLUG_CPU
diff --exclude=.git -urp linux-2.6.19.base/arch/i386/kernel/entry.S linux-2.6.19/arch/i386/kernel/entry.S
--- linux-2.6.19.base/arch/i386/kernel/entry.S 2006-11-29 13:57:37.000000000 -0800
+++ linux-2.6.19/arch/i386/kernel/entry.S 2006-12-03 14:15:47.000000000 -0800
@@ -441,7 +441,7 @@ ldt_ss:
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-2.6.19.base/arch/i386/kernel/i8259.c linux-2.6.19/arch/i386/kernel/i8259.c
--- linux-2.6.19.base/arch/i386/kernel/i8259.c 2006-11-29 13:57:37.000000000 -0800
+++ linux-2.6.19/arch/i386/kernel/i8259.c 2006-12-03 14:15:47.000000000 -0800
@@ -10,6 +10,7 @@
#include <linux/kernel_stat.h>
#include <linux/sysdev.h>
#include <linux/bitops.h>
+#include <linux/perfmon.h>

#include <asm/8253pit.h>
#include <asm/atomic.h>
diff --exclude=.git -urp linux-2.6.19.base/arch/i386/kernel/process.c linux-2.6.19/arch/i386/kernel/process.c
--- linux-2.6.19.base/arch/i386/kernel/process.c 2006-12-04 07:51:01.000000000 -0800
+++ linux-2.6.19/arch/i386/kernel/process.c 2006-12-03 14:15:47.000000000 -0800
@@ -32,6 +32,7 @@
#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>
@@ -415,6 +416,7 @@ void exit_thread(void)
tss->io_bitmap_base = INVALID_IO_BITMAP_OFFSET;
put_cpu();
}
+ pfm_exit_thread(current);
}

void flush_thread(void)
@@ -467,6 +469,8 @@ int copy_thread(int nr, unsigned long cl
savesegment(fs,p->thread.fs);
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,
@@ -570,8 +574,9 @@ 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;

@@ -587,6 +592,10 @@ 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
@@ -726,8 +735,8 @@ 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-2.6.19.base/arch/i386/kernel/signal.c linux-2.6.19/arch/i386/kernel/signal.c
--- linux-2.6.19.base/arch/i386/kernel/signal.c 2006-11-29 13:57:37.000000000 -0800
+++ linux-2.6.19/arch/i386/kernel/signal.c 2006-12-03 14:15:47.000000000 -0800
@@ -21,6 +21,7 @@
#include <linux/suspend.h>
#include <linux/ptrace.h>
#include <linux/elf.h>
+#include <linux/perfmon.h>
#include <asm/processor.h>
#include <asm/ucontext.h>
#include <asm/uaccess.h>
@@ -651,6 +652,9 @@ void do_notify_resume(struct pt_regs *re
clear_thread_flag(TIF_SINGLESTEP);
}

+ if (thread_info_flags & _TIF_PERFMON_WORK)
+ pfm_handle_work();
+
/* deal with pending signal delivery */
if (thread_info_flags & (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK))
do_signal(regs);
diff --exclude=.git -urp linux-2.6.19.base/arch/i386/kernel/smpboot.c linux-2.6.19/arch/i386/kernel/smpboot.c
--- linux-2.6.19.base/arch/i386/kernel/smpboot.c 2006-11-29 13:57:37.000000000 -0800
+++ linux-2.6.19/arch/i386/kernel/smpboot.c 2006-12-03 14:15:47.000000000 -0800
@@ -45,6 +45,7 @@
#include <linux/notifier.h>
#include <linux/cpu.h>
#include <linux/percpu.h>
+#include <linux/perfmon.h>

#include <linux/delay.h>
#include <linux/mc146818rtc.h>
@@ -1395,6 +1396,7 @@ 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-2.6.19.base/arch/i386/kernel/syscall_table.S linux-2.6.19/arch/i386/kernel/syscall_table.S
--- linux-2.6.19.base/arch/i386/kernel/syscall_table.S 2006-11-29 13:57:37.000000000 -0800
+++ linux-2.6.19/arch/i386/kernel/syscall_table.S 2006-12-03 14:15:47.000000000 -0800
@@ -319,3 +319,15 @@ ENTRY(sys_call_table)
.long sys_move_pages
.long sys_getcpu
.long sys_epoll_pwait
+ .long sys_pfm_create_context /* 320 */
+ .long sys_pfm_write_pmcs
+ .long sys_pfm_write_pmds
+ .long sys_pfm_read_pmds
+ .long sys_pfm_load_context
+ .long sys_pfm_start /* 325 */
+ .long sys_pfm_stop
+ .long sys_pfm_restart
+ .long sys_pfm_create_evtsets
+ .long sys_pfm_getinfo_evtsets
+ .long sys_pfm_delete_evtsets /* 330 */
+ .long sys_pfm_unload_context
Only in linux-2.6.19/arch/i386: perfmon
diff --exclude=.git -urp linux-2.6.19.base/include/asm-i386/mach-default/entry_arch.h linux-2.6.19/include/asm-i386/mach-default/entry_arch.h
--- linux-2.6.19.base/include/asm-i386/mach-default/entry_arch.h 2006-11-29 13:57:37.000000000 -0800
+++ linux-2.6.19/include/asm-i386/mach-default/entry_arch.h 2006-12-03 14:15:47.000000000 -0800
@@ -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-2.6.19.base/include/asm-i386/mach-default/irq_vectors.h linux-2.6.19/include/asm-i386/mach-default/irq_vectors.h
--- linux-2.6.19.base/include/asm-i386/mach-default/irq_vectors.h 2006-11-29 13:57:37.000000000 -0800
+++ linux-2.6.19/include/asm-i386/mach-default/irq_vectors.h 2006-12-03 14:15:47.000000000 -0800
@@ -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-2.6.19/include/asm-i386: perfmon.h
Only in linux-2.6.19/include/asm-i386: perfmon_pebs_smpl.h
diff --exclude=.git -urp linux-2.6.19.base/include/asm-i386/thread_info.h linux-2.6.19/include/asm-i386/thread_info.h
--- linux-2.6.19.base/include/asm-i386/thread_info.h 2006-11-29 13:57:37.000000000 -0800
+++ linux-2.6.19/include/asm-i386/thread_info.h 2006-12-03 14:15:47.000000000 -0800
@@ -139,9 +139,11 @@ static inline struct thread_info *curren
#define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */
#define TIF_SECCOMP 8 /* secure computing */
#define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal() */
+#define TIF_PERFMON_WORK 10 /* 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_PERFMON_CTXSW 19 /* perfmon needs ctxsw calls */

#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
@@ -155,6 +157,8 @@ static inline struct thread_info *curren
#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
#define _TIF_DEBUG (1<<TIF_DEBUG)
#define _TIF_IO_BITMAP (1<<TIF_IO_BITMAP)
+#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 \
@@ -164,7 +168,7 @@ 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-2.6.19.base/include/asm-i386/unistd.h linux-2.6.19/include/asm-i386/unistd.h
--- linux-2.6.19.base/include/asm-i386/unistd.h 2006-11-29 13:57:37.000000000 -0800
+++ linux-2.6.19/include/asm-i386/unistd.h 2006-12-03 14:15:47.000000000 -0800
@@ -325,10 +325,23 @@
#define __NR_move_pages 317
#define __NR_getcpu 318
#define __NR_epoll_pwait 319
+#define __NR_pfm_create_context 320
+#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 320
+#define NR_syscalls 332
#include <linux/err.h>

/*
-
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