[PATCH 13/18] 2.6.17.9 perfmon2 patch for review: modified i386 files

From: Stephane Eranian
Date: Wed Aug 23 2006 - 04:16:33 EST

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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 -urp linux-2.6.17.9.base/arch/i386/Kconfig linux-2.6.17.9/arch/i386/Kconfig
--- linux-2.6.17.9.base/arch/i386/Kconfig 2006-08-18 09:26:24.000000000 -0700
+++ linux-2.6.17.9/arch/i386/Kconfig 2006-08-21 03:37:45.000000000 -0700
@@ -762,6 +762,7 @@ config HOTPLUG_CPU
enable suspend on SMP systems. CPUs can be controlled through
/sys/devices/system/cpu.

+source "arch/i386/perfmon/Kconfig"

endmenu

diff -urp linux-2.6.17.9.base/arch/i386/Makefile linux-2.6.17.9/arch/i386/Makefile
--- linux-2.6.17.9.base/arch/i386/Makefile 2006-08-18 09:26:24.000000000 -0700
+++ linux-2.6.17.9/arch/i386/Makefile 2006-08-21 03:37:45.000000000 -0700
@@ -87,6 +87,7 @@ 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 -urp linux-2.6.17.9.base/arch/i386/kernel/apic.c linux-2.6.17.9/arch/i386/kernel/apic.c
--- linux-2.6.17.9.base/arch/i386/kernel/apic.c 2006-08-18 09:26:24.000000000 -0700
+++ linux-2.6.17.9/arch/i386/kernel/apic.c 2006-08-21 03:37:45.000000000 -0700
@@ -27,6 +27,7 @@
#include <linux/sysdev.h>
#include <linux/cpu.h>
#include <linux/module.h>
+#include <linux/perfmon.h>

#include <asm/atomic.h>
#include <asm/smp.h>
@@ -1179,6 +1180,8 @@ inline void smp_local_timer_interrupt(st
update_process_times(user_mode_vm(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 -urp linux-2.6.17.9.base/arch/i386/kernel/i8259.c linux-2.6.17.9/arch/i386/kernel/i8259.c
--- linux-2.6.17.9.base/arch/i386/kernel/i8259.c 2006-08-18 09:26:24.000000000 -0700
+++ linux-2.6.17.9/arch/i386/kernel/i8259.c 2006-08-21 03:37:45.000000000 -0700
@@ -11,6 +11,7 @@
#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>
@@ -427,6 +428,8 @@ void __init init_IRQ(void)
*/
setup_pit_timer();

+ pfm_vector_init();
+
/*
* External FPU? Set up irq13 if so, for
* original braindamaged IBM FERR coupling.
diff -urp linux-2.6.17.9.base/arch/i386/kernel/process.c linux-2.6.17.9/arch/i386/kernel/process.c
--- linux-2.6.17.9.base/arch/i386/kernel/process.c 2006-08-21 03:33:27.000000000 -0700
+++ linux-2.6.17.9/arch/i386/kernel/process.c 2006-08-21 03:37:45.000000000 -0700
@@ -33,6 +33,7 @@
#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>
@@ -380,6 +381,7 @@ void exit_thread(void)
tss->io_bitmap_base = INVALID_IO_BITMAP_OFFSET;
put_cpu();
}
+ pfm_exit_thread(current);
}

void flush_thread(void)
@@ -432,6 +434,8 @@ 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 = kmalloc(IO_BITMAP_BYTES, GFP_KERNEL);
@@ -536,8 +540,9 @@ 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;

@@ -553,6 +558,10 @@ static noinline void __switch_to_xtra(st
set_debugreg(next->debugreg[7], 7);
}

+ if (test_tsk_thread_flag(next_p, TIF_PERFMON)
+ || test_tsk_thread_flag(prev_p, TIF_PERFMON))
+ 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
@@ -691,9 +700,9 @@ struct task_struct fastcall * __switch_t
/*
* Now maybe reload the debug registers
*/
- 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);
+ if (unlikely((task_thread_info(next_p)->flags & _TIF_WORK_CTXSW)
+ || (task_thread_info(prev_p)->flags & _TIF_WORK_CTXSW)))
+ __switch_to_xtra(prev_p, next_p, tss);

disable_tsc(prev_p, next_p);

diff -urp linux-2.6.17.9.base/arch/i386/kernel/signal.c linux-2.6.17.9/arch/i386/kernel/signal.c
--- linux-2.6.17.9.base/arch/i386/kernel/signal.c 2006-08-18 09:26:24.000000000 -0700
+++ linux-2.6.17.9/arch/i386/kernel/signal.c 2006-08-21 03:37:45.000000000 -0700
@@ -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 +652,8 @@ void do_notify_resume(struct pt_regs *re
clear_thread_flag(TIF_SINGLESTEP);
}

+ pfm_handle_work(current);
+
/* deal with pending signal delivery */
if (thread_info_flags & (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK))
do_signal(regs);
diff -urp linux-2.6.17.9.base/arch/i386/kernel/syscall_table.S linux-2.6.17.9/arch/i386/kernel/syscall_table.S
--- linux-2.6.17.9.base/arch/i386/kernel/syscall_table.S 2006-08-18 09:26:24.000000000 -0700
+++ linux-2.6.17.9/arch/i386/kernel/syscall_table.S 2006-08-21 03:37:45.000000000 -0700
@@ -316,3 +316,15 @@ ENTRY(sys_call_table)
.long sys_sync_file_range
.long sys_tee /* 315 */
.long sys_vmsplice
+ .long sys_pfm_create_context
+ .long sys_pfm_write_pmcs
+ .long sys_pfm_write_pmds
+ .long sys_pfm_read_pmds /* 320 */
+ .long sys_pfm_load_context
+ .long sys_pfm_start
+ .long sys_pfm_stop
+ .long sys_pfm_restart
+ .long sys_pfm_create_evtsets /* 325 */
+ .long sys_pfm_getinfo_evtsets
+ .long sys_pfm_delete_evtsets
+ .long sys_pfm_unload_context
Only in linux-2.6.17.9/arch/i386: perfmon
diff -urp linux-2.6.17.9.base/include/asm-i386/mach-default/entry_arch.h linux-2.6.17.9/include/asm-i386/mach-default/entry_arch.h
--- linux-2.6.17.9.base/include/asm-i386/mach-default/entry_arch.h 2006-08-18 09:26:24.000000000 -0700
+++ linux-2.6.17.9/include/asm-i386/mach-default/entry_arch.h 2006-08-21 03:37:45.000000000 -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 -urp linux-2.6.17.9.base/include/asm-i386/mach-default/irq_vectors.h linux-2.6.17.9/include/asm-i386/mach-default/irq_vectors.h
--- linux-2.6.17.9.base/include/asm-i386/mach-default/irq_vectors.h 2006-08-18 09:26:24.000000000 -0700
+++ linux-2.6.17.9/include/asm-i386/mach-default/irq_vectors.h 2006-08-21 03:37:45.000000000 -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-2.6.17.9/include/asm-i386: perfmon.h
Only in linux-2.6.17.9/include/asm-i386: perfmon_p4_pebs_smpl.h
diff -urp linux-2.6.17.9.base/include/asm-i386/thread_info.h linux-2.6.17.9/include/asm-i386/thread_info.h
--- linux-2.6.17.9.base/include/asm-i386/thread_info.h 2006-08-21 03:33:27.000000000 -0700
+++ linux-2.6.17.9/include/asm-i386/thread_info.h 2006-08-21 03:37:45.000000000 -0700
@@ -145,6 +145,7 @@ register unsigned long current_stack_poi
#define TIF_MEMDIE 17
#define TIF_DEBUG 18 /* uses debug registers */
#define TIF_IO_BITMAP 19 /* uses I/O bitmap */
+#define TIF_PERFMON 20 /* uses perfmon */

#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
@@ -159,6 +160,7 @@ register unsigned long current_stack_poi
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
#define _TIF_DEBUG (1<<TIF_DEBUG)
#define _TIF_IO_BITMAP (1<<TIF_IO_BITMAP)
+#define _TIF_PERFMON (1<<TIF_PERFMON)

/* work to do on interrupt/exception return */
#define _TIF_WORK_MASK \
@@ -168,7 +170,7 @@ register unsigned long current_stack_poi
#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)

/*
* Thread-synchronous status.
diff -urp linux-2.6.17.9.base/include/asm-i386/unistd.h linux-2.6.17.9/include/asm-i386/unistd.h
--- linux-2.6.17.9.base/include/asm-i386/unistd.h 2006-08-18 09:26:24.000000000 -0700
+++ linux-2.6.17.9/include/asm-i386/unistd.h 2006-08-21 03:37:45.000000000 -0700
@@ -322,8 +322,19 @@
#define __NR_sync_file_range 314
#define __NR_tee 315
#define __NR_vmsplice 316
+#define __NR_pfm_create_context 317
+#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_syscalls 317
+#define NR_syscalls 328

/*
* user-visible error numbers are in the range -1 - -128: see
-
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Next message: Hans Reiser: "Looking for Kernel hacking or storage systems design and code consultingwork"
Previous message: Stephane Eranian: "[PATCH 18/18] 2.6.17.9 perfmon2 patch for review: new x86_64 files"
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