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Subject[PATCH 19/21] 2.6.19 perfmon2 : modified x86_64 files
This patch contains the modified x86_64 files.

The modified files are as follows:

arch/x86_64/Kconfig:
- add link to configuration menu in arch/x86_64/perfmon/Kconfig

arch/x86_64/Makefile:
- add perfmon subdir

arch/x86_64/ia32/ia32entry.S:
- add system call entry points for 32-bit ABI

arch/x86_64/kernel/apic.c:
- add hook to call pfm_handle_switch_timeout() on timer tick for timeout based
set multiplexing

arch/x86_64/kernel/entry.S:
- add pmu_interrupt stub

arch/x86_64/kernel/i8259.c:
- PMU interrupt vector gate initialization

arch/x86_64/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
- split enter_idle() is two. Until we get to 2.6.20, we need to add enter_idle() to the tail
of each interrupt handler due to idle loops. The loops are gone in 2.6.20.

arch/x86_64/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/x86_64/kernel/nmi.c:
- use PERFCTR1 for architected PERFMON to allow PEBS use on Core-base processors

include/asm-x86_64/hw_irq.h:
- define PMU interrupt vector

include/asm-x86_64/irq.h:
- update FIRST_SYSTEM_VECTOR

include/asm-x86_64/thread_info.h:
- add TIF_PERFMON which is used for PMU context switching in __switch_to()

include/asm-x86_64/unistd.h:
- add new system calls



diff --exclude=.git -urp linux-2.6.19.base/arch/x86_64/Kconfig linux-2.6.19/arch/x86_64/Kconfig
--- linux-2.6.19.base/arch/x86_64/Kconfig 2006-11-29 13:57:37.000000000 -0800
+++ linux-2.6.19/arch/x86_64/Kconfig 2006-12-03 14:15:48.000000000 -0800
@@ -587,6 +587,8 @@ config K8_NB
def_bool y
depends on AGP_AMD64 || IOMMU || (PCI && NUMA)

+source "arch/x86_64/perfmon/Kconfig"
+
endmenu

#
diff --exclude=.git -urp linux-2.6.19.base/arch/x86_64/Makefile linux-2.6.19/arch/x86_64/Makefile
--- linux-2.6.19.base/arch/x86_64/Makefile 2006-11-29 13:57:37.000000000 -0800
+++ linux-2.6.19/arch/x86_64/Makefile 2006-12-03 14:15:48.000000000 -0800
@@ -81,6 +81,7 @@ core-y += arch/x86_64/kernel/ \
arch/x86_64/crypto/
core-$(CONFIG_IA32_EMULATION) += arch/x86_64/ia32/
drivers-$(CONFIG_PCI) += arch/x86_64/pci/
+drivers-$(CONFIG_PERFMON) += arch/x86_64/perfmon/
drivers-$(CONFIG_OPROFILE) += arch/x86_64/oprofile/

boot := arch/x86_64/boot
diff --exclude=.git -urp linux-2.6.19.base/arch/x86_64/ia32/ia32entry.S linux-2.6.19/arch/x86_64/ia32/ia32entry.S
--- linux-2.6.19.base/arch/x86_64/ia32/ia32entry.S 2006-11-29 13:57:37.000000000 -0800
+++ linux-2.6.19/arch/x86_64/ia32/ia32entry.S 2006-12-03 14:15:48.000000000 -0800
@@ -718,4 +718,16 @@ ia32_sys_call_table:
.quad compat_sys_vmsplice
.quad compat_sys_move_pages
.quad sys_getcpu
+ .quad sys_pfm_create_context
+ .quad sys_pfm_write_pmcs
+ .quad sys_pfm_write_pmds
+ .quad sys_pfm_read_pmds
+ .quad sys_pfm_load_context
+ .quad sys_pfm_start
+ .quad sys_pfm_stop
+ .quad sys_pfm_restart
+ .quad sys_pfm_create_evtsets
+ .quad sys_pfm_getinfo_evtsets
+ .quad sys_pfm_delete_evtsets
+ .quad sys_pfm_unload_context
ia32_syscall_end:
diff --exclude=.git -urp linux-2.6.19.base/arch/x86_64/kernel/apic.c linux-2.6.19/arch/x86_64/kernel/apic.c
--- linux-2.6.19.base/arch/x86_64/kernel/apic.c 2006-12-03 14:24:40.000000000 -0800
+++ linux-2.6.19/arch/x86_64/kernel/apic.c 2006-12-03 14:15:48.000000000 -0800
@@ -25,6 +25,7 @@
#include <linux/kernel_stat.h>
#include <linux/sysdev.h>
#include <linux/module.h>
+#include <linux/perfmon.h>

#include <asm/atomic.h>
#include <asm/smp.h>
@@ -888,6 +889,7 @@ void setup_APIC_extened_lvt(unsigned cha
void smp_local_timer_interrupt(void)
{
profile_tick(CPU_PROFILING);
+ pfm_handle_switch_timeout();
#ifdef CONFIG_SMP
update_process_times(user_mode(get_irq_regs()));
#endif
diff --exclude=.git -urp linux-2.6.19.base/arch/x86_64/kernel/entry.S linux-2.6.19/arch/x86_64/kernel/entry.S
--- linux-2.6.19.base/arch/x86_64/kernel/entry.S 2006-11-29 13:57:37.000000000 -0800
+++ linux-2.6.19/arch/x86_64/kernel/entry.S 2006-12-03 14:15:48.000000000 -0800
@@ -284,7 +284,7 @@ sysret_careful:
sysret_signal:
TRACE_IRQS_ON
sti
- testl $(_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_TIF_SINGLESTEP),%edx
+ testl $(_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_TIF_SINGLESTEP|_TIF_PERFMON_WORK),%edx
jz 1f

/* Really a signal */
@@ -399,7 +399,7 @@ int_very_careful:
jmp int_restore_rest

int_signal:
- testl $(_TIF_NOTIFY_RESUME|_TIF_SIGPENDING|_TIF_SINGLESTEP),%edx
+ testl $(_TIF_NOTIFY_RESUME|_TIF_SIGPENDING|_TIF_SINGLESTEP|_TIF_PERFMON_WORK),%edx
jz 1f
movq %rsp,%rdi # &ptregs -> arg1
xorl %esi,%esi # oldset -> arg2
@@ -623,7 +623,7 @@ retint_careful:
jmp retint_check

retint_signal:
- testl $(_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_TIF_SINGLESTEP),%edx
+ testl $(_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_TIF_SINGLESTEP|_TIF_PERFMON_WORK),%edx
jz retint_swapgs
TRACE_IRQS_ON
sti
@@ -712,7 +712,12 @@ END(error_interrupt)
ENTRY(spurious_interrupt)
apicinterrupt SPURIOUS_APIC_VECTOR,smp_spurious_interrupt
END(spurious_interrupt)
-
+
+#ifdef CONFIG_PERFMON
+ENTRY(pmu_interrupt)
+ apicinterrupt LOCAL_PERFMON_VECTOR,smp_pmu_interrupt
+#endif
+
/*
* Exception entry points.
*/
diff --exclude=.git -urp linux-2.6.19.base/arch/x86_64/kernel/i8259.c linux-2.6.19/arch/x86_64/kernel/i8259.c
--- linux-2.6.19.base/arch/x86_64/kernel/i8259.c 2006-11-29 13:57:37.000000000 -0800
+++ linux-2.6.19/arch/x86_64/kernel/i8259.c 2006-12-03 14:15:48.000000000 -0800
@@ -12,6 +12,7 @@
#include <linux/kernel_stat.h>
#include <linux/sysdev.h>
#include <linux/bitops.h>
+#include <linux/perfmon.h>

#include <asm/acpi.h>
#include <asm/atomic.h>
@@ -551,7 +552,9 @@ void __init init_IRQ(void)
/* IPI vectors for APIC spurious and error interrupts */
set_intr_gate(SPURIOUS_APIC_VECTOR, spurious_interrupt);
set_intr_gate(ERROR_APIC_VECTOR, error_interrupt);
-
+#ifdef CONFIG_PERFMON
+ set_intr_gate(LOCAL_PERFMON_VECTOR, pmu_interrupt);
+#endif
/*
* Set the clock to HZ Hz, we already have a valid
* vector now:
diff --exclude=.git -urp linux-2.6.19.base/arch/x86_64/kernel/irq.c linux-2.6.19/arch/x86_64/kernel/irq.c
--- linux-2.6.19.base/arch/x86_64/kernel/irq.c 2006-11-29 13:57:37.000000000 -0800
+++ linux-2.6.19/arch/x86_64/kernel/irq.c 2006-12-03 14:15:48.000000000 -0800
@@ -127,6 +127,7 @@ asmlinkage unsigned int do_IRQ(struct pt
irq_exit();

set_irq_regs(old_regs);
+ enter_idle();
return 1;
}

diff --exclude=.git -urp linux-2.6.19.base/arch/x86_64/kernel/nmi.c linux-2.6.19/arch/x86_64/kernel/nmi.c
--- linux-2.6.19.base/arch/x86_64/kernel/nmi.c 2006-11-29 13:57:37.000000000 -0800
+++ linux-2.6.19/arch/x86_64/kernel/nmi.c 2006-12-04 07:45:45.000000000 -0800
@@ -271,7 +271,7 @@ int __init check_nmi_watchdog (void)
* 32nd bit should be 1, for 33.. to be 1.
* Find the appropriate nmi_hz
*/
- if (wd->perfctr_msr == MSR_ARCH_PERFMON_PERFCTR0 &&
+ if (wd->perfctr_msr == MSR_ARCH_PERFMON_PERFCTR1 &&
((u64)cpu_khz * 1000) > 0x7fffffffULL) {
nmi_hz = ((u64)cpu_khz * 1000) / 0x7fffffffUL + 1;
}
@@ -613,8 +613,8 @@ static int setup_intel_arch_watchdog(voi
(ebx & ARCH_PERFMON_UNHALTED_CORE_CYCLES_PRESENT))
goto fail;

- perfctr_msr = MSR_ARCH_PERFMON_PERFCTR0;
- evntsel_msr = MSR_ARCH_PERFMON_EVENTSEL0;
+ perfctr_msr = MSR_ARCH_PERFMON_PERFCTR1;
+ evntsel_msr = MSR_ARCH_PERFMON_EVENTSEL1;

if (!reserve_perfctr_nmi(perfctr_msr))
goto fail;
@@ -842,7 +842,7 @@ int __kprobes nmi_watchdog_tick(struct p
dummy &= ~P4_CCCR_OVF;
wrmsrl(wd->cccr_msr, dummy);
apic_write(APIC_LVTPC, APIC_DM_NMI);
- } else if (wd->perfctr_msr == MSR_ARCH_PERFMON_PERFCTR0) {
+ } else if (wd->perfctr_msr == MSR_ARCH_PERFMON_PERFCTR1) {
/*
* ArchPerfom/Core Duo needs to re-unmask
* the apic vector
diff --exclude=.git -urp linux-2.6.19.base/arch/x86_64/kernel/process.c linux-2.6.19/arch/x86_64/kernel/process.c
--- linux-2.6.19.base/arch/x86_64/kernel/process.c 2006-11-29 13:57:37.000000000 -0800
+++ linux-2.6.19/arch/x86_64/kernel/process.c 2006-12-03 14:15:48.000000000 -0800
@@ -36,6 +36,7 @@
#include <linux/random.h>
#include <linux/notifier.h>
#include <linux/kprobes.h>
+#include <linux/perfmon.h>

#include <asm/uaccess.h>
#include <asm/pgtable.h>
@@ -80,12 +81,22 @@ void idle_notifier_unregister(struct not
}
EXPORT_SYMBOL(idle_notifier_unregister);

-void enter_idle(void)
+static void __enter_idle(void)
{
write_pda(isidle, 1);
atomic_notifier_call_chain(&idle_notifier, IDLE_START, NULL);
}

+/* Called from interrupts to signify idle end */
+void enter_idle(void)
+{
+ /* idle loop has pid 0 */
+ if (current->pid)
+ return;
+ __enter_idle();
+}
+
+
static void __exit_idle(void)
{
if (test_and_clear_bit_pda(0, isidle) == 0)
@@ -219,7 +230,7 @@ void cpu_idle (void)
idle = default_idle;
if (cpu_is_offline(smp_processor_id()))
play_dead();
- enter_idle();
+ __enter_idle();
idle();
/* In many cases the interrupt that ended idle
has already called exit_idle. But some idle
@@ -370,6 +381,7 @@ void exit_thread(void)
t->io_bitmap_max = 0;
put_cpu();
}
+ pfm_exit_thread(me);
}

void flush_thread(void)
@@ -475,6 +487,8 @@ int copy_thread(int nr, unsigned long cl
asm("mov %%es,%0" : "=m" (p->thread.es));
asm("mov %%ds,%0" : "=m" (p->thread.ds));

+ pfm_copy_thread(p);
+
if (unlikely(test_tsk_thread_flag(me, TIF_IO_BITMAP))) {
p->thread.io_bitmap_ptr = kmalloc(IO_BITMAP_BYTES, GFP_KERNEL);
if (!p->thread.io_bitmap_ptr) {
@@ -545,6 +559,10 @@ static inline void __switch_to_xtra(stru
*/
memset(tss->io_bitmap, 0xff, prev->io_bitmap_max);
}
+
+ 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);
}

/*
@@ -649,7 +667,7 @@ __switch_to(struct task_struct *prev_p,
* Now maybe reload the debug registers and handle I/O bitmaps
*/
if (unlikely((task_thread_info(next_p)->flags & _TIF_WORK_CTXSW))
- || test_tsk_thread_flag(prev_p, TIF_IO_BITMAP))
+ || (task_thread_info(prev_p)->flags & _TIF_WORK_CTXSW))
__switch_to_xtra(prev_p, next_p, tss);

/* If the task has used fpu the last 5 timeslices, just do a full
diff --exclude=.git -urp linux-2.6.19.base/arch/x86_64/kernel/setup64.c linux-2.6.19/arch/x86_64/kernel/setup64.c
--- linux-2.6.19.base/arch/x86_64/kernel/setup64.c 2006-11-29 13:57:37.000000000 -0800
+++ linux-2.6.19/arch/x86_64/kernel/setup64.c 2006-12-03 14:15:48.000000000 -0800
@@ -11,6 +11,7 @@
#include <linux/bootmem.h>
#include <linux/bitops.h>
#include <linux/module.h>
+#include <linux/perfmon.h>
#include <asm/bootsetup.h>
#include <asm/pda.h>
#include <asm/pgtable.h>
@@ -285,4 +286,6 @@ void __cpuinit cpu_init (void)
fpu_init();

raw_local_save_flags(kernel_eflags);
+
+ pfm_init_percpu();
}
diff --exclude=.git -urp linux-2.6.19.base/arch/x86_64/kernel/signal.c linux-2.6.19/arch/x86_64/kernel/signal.c
--- linux-2.6.19.base/arch/x86_64/kernel/signal.c 2006-11-29 13:57:37.000000000 -0800
+++ linux-2.6.19/arch/x86_64/kernel/signal.c 2006-12-03 14:15:48.000000000 -0800
@@ -22,6 +22,7 @@
#include <linux/stddef.h>
#include <linux/personality.h>
#include <linux/compiler.h>
+#include <linux/perfmon.h>
#include <asm/ucontext.h>
#include <asm/uaccess.h>
#include <asm/i387.h>
@@ -466,13 +467,16 @@ do_notify_resume(struct pt_regs *regs, v
printk("do_notify_resume flags:%x rip:%lx rsp:%lx caller:%lx pending:%lx\n",
thread_info_flags, regs->rip, regs->rsp, __builtin_return_address(0),signal_pending(current));
#endif
-
+
/* Pending single-step? */
if (thread_info_flags & _TIF_SINGLESTEP) {
regs->eflags |= TF_MASK;
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/x86_64/kernel/smpboot.c linux-2.6.19/arch/x86_64/kernel/smpboot.c
--- linux-2.6.19.base/arch/x86_64/kernel/smpboot.c 2006-11-29 13:57:37.000000000 -0800
+++ linux-2.6.19/arch/x86_64/kernel/smpboot.c 2006-12-03 14:15:48.000000000 -0800
@@ -49,6 +49,7 @@
#include <linux/delay.h>
#include <linux/mc146818rtc.h>
#include <linux/smp.h>
+#include <linux/perfmon.h>

#include <asm/mtrr.h>
#include <asm/pgalloc.h>
@@ -1255,6 +1256,7 @@ int __cpu_disable(void)
spin_unlock(&vector_lock);
remove_cpu_from_maps();
fixup_irqs(cpu_online_map);
+ pfm_cpu_disable();
return 0;
}

Only in linux-2.6.19/arch/x86_64: perfmon
diff --exclude=.git -urp linux-2.6.19.base/include/asm-x86_64/hw_irq.h linux-2.6.19/include/asm-x86_64/hw_irq.h
--- linux-2.6.19.base/include/asm-x86_64/hw_irq.h 2006-11-29 13:57:37.000000000 -0800
+++ linux-2.6.19/include/asm-x86_64/hw_irq.h 2006-12-03 14:15:48.000000000 -0800
@@ -63,6 +63,7 @@
* sources per level' errata.
*/
#define LOCAL_TIMER_VECTOR 0xef
+#define LOCAL_PERFMON_VECTOR 0xee

/*
* First APIC vector available to drivers: (vectors 0x30-0xee)
Only in linux-2.6.19/include/asm-x86_64: perfmon.h
Only in linux-2.6.19/include/asm-x86_64: perfmon_pebs_smpl.h
diff --exclude=.git -urp linux-2.6.19.base/include/asm-x86_64/thread_info.h linux-2.6.19/include/asm-x86_64/thread_info.h
--- linux-2.6.19.base/include/asm-x86_64/thread_info.h 2006-11-29 13:57:37.000000000 -0800
+++ linux-2.6.19/include/asm-x86_64/thread_info.h 2006-12-03 14:15:48.000000000 -0800
@@ -115,6 +115,7 @@ static inline struct thread_info *stack_
#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() */
/* 16 free */
#define TIF_IA32 17 /* 32bit process */
#define TIF_FORK 18 /* ret_from_fork */
@@ -122,6 +123,7 @@ static inline struct thread_info *stack_
#define TIF_MEMDIE 20
#define TIF_DEBUG 21 /* uses debug registers */
#define TIF_IO_BITMAP 22 /* uses I/O bitmap */
+#define TIF_PERFMON_CTXSW 23 /* perfmon needs ctxsw calls */

#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
@@ -137,6 +139,8 @@ static inline struct thread_info *stack_
#define _TIF_ABI_PENDING (1<<TIF_ABI_PENDING)
#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 \
@@ -145,7 +149,7 @@ static inline struct thread_info *stack_
#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)

#define PREEMPT_ACTIVE 0x10000000

diff --exclude=.git -urp linux-2.6.19.base/include/asm-x86_64/unistd.h linux-2.6.19/include/asm-x86_64/unistd.h
--- linux-2.6.19.base/include/asm-x86_64/unistd.h 2006-11-29 13:57:37.000000000 -0800
+++ linux-2.6.19/include/asm-x86_64/unistd.h 2006-12-03 14:15:48.000000000 -0800
@@ -619,8 +619,32 @@ __SYSCALL(__NR_sync_file_range, sys_sync
__SYSCALL(__NR_vmsplice, sys_vmsplice)
#define __NR_move_pages 279
__SYSCALL(__NR_move_pages, sys_move_pages)
+#define __NR_pfm_create_context 280
+__SYSCALL(__NR_pfm_create_context, sys_pfm_create_context)
+#define __NR_pfm_write_pmcs (__NR_pfm_create_context+1)
+__SYSCALL(__NR_pfm_write_pmcs, sys_pfm_write_pmcs)
+#define __NR_pfm_write_pmds (__NR_pfm_create_context+2)
+__SYSCALL(__NR_pfm_write_pmds, sys_pfm_write_pmds)
+#define __NR_pfm_read_pmds (__NR_pfm_create_context+3)
+__SYSCALL(__NR_pfm_read_pmds, sys_pfm_read_pmds)
+#define __NR_pfm_load_context (__NR_pfm_create_context+4)
+__SYSCALL(__NR_pfm_load_context, sys_pfm_load_context)
+#define __NR_pfm_start (__NR_pfm_create_context+5)
+__SYSCALL(__NR_pfm_start, sys_pfm_start)
+#define __NR_pfm_stop (__NR_pfm_create_context+6)
+__SYSCALL(__NR_pfm_stop, sys_pfm_stop)
+#define __NR_pfm_restart (__NR_pfm_create_context+7)
+__SYSCALL(__NR_pfm_restart, sys_pfm_restart)
+#define __NR_pfm_create_evtsets (__NR_pfm_create_context+8)
+__SYSCALL(__NR_pfm_create_evtsets, sys_pfm_create_evtsets)
+#define __NR_pfm_getinfo_evtsets (__NR_pfm_create_context+9)
+__SYSCALL(__NR_pfm_getinfo_evtsets, sys_pfm_getinfo_evtsets)
+#define __NR_pfm_delete_evtsets (__NR_pfm_create_context+10)
+__SYSCALL(__NR_pfm_delete_evtsets, sys_pfm_delete_evtsets)
+#define __NR_pfm_unload_context (__NR_pfm_create_context+11)
+__SYSCALL(__NR_pfm_unload_context, sys_pfm_unload_context)

-#define __NR_syscall_max __NR_move_pages
+#define __NR_syscall_max __NR_pfm_unload_context

#ifdef __KERNEL__
#include <linux/err.h>
-
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