--- linux-2.6.11.perfctr27/CREDITS.~1~	2005-03-02 19:24:14.000000000 +0100
+++ linux-2.6.11.perfctr27/CREDITS	2005-03-14 11:10:47.000000000 +0100
@@ -2620,6 +2620,7 @@ N: Mikael Pettersson
 E: mikpe@csd.uu.se
 W: http://www.csd.uu.se/~mikpe/
 D: Miscellaneous fixes
+D: Performance-monitoring counters driver
 
 N: Reed H. Petty
 E: rhp@draper.net
--- linux-2.6.11.perfctr27/MAINTAINERS.~1~	2005-03-02 19:24:14.000000000 +0100
+++ linux-2.6.11.perfctr27/MAINTAINERS	2005-03-14 11:10:47.000000000 +0100
@@ -1769,6 +1769,12 @@ M:	tsbogend@alpha.franken.de
 L:	linux-net@vger.kernel.org
 S:	Maintained
 
+PERFORMANCE-MONITORING COUNTERS DRIVER
+P:	Mikael Pettersson
+M:	mikpe@csd.uu.se
+W:	http://www.csd.uu.se/~mikpe/linux/perfctr/
+S:	Maintained
+
 PHRAM MTD DRIVER
 P:	Jörn Engel
 M:	joern@wh.fh-wedel.de
--- linux-2.6.11.perfctr27/arch/i386/Kconfig.~1~	2005-03-02 19:24:14.000000000 +0100
+++ linux-2.6.11.perfctr27/arch/i386/Kconfig	2005-03-14 11:10:47.000000000 +0100
@@ -888,6 +888,8 @@ config REGPARM
 	generate incorrect output with certain kernel constructs when
 	-mregparm=3 is used.
 
+source "drivers/perfctr/Kconfig"
+
 endmenu
 
 
--- linux-2.6.11.perfctr27/arch/i386/kernel/entry.S.~1~	2005-03-02 19:24:14.000000000 +0100
+++ linux-2.6.11.perfctr27/arch/i386/kernel/entry.S	2005-03-14 11:18:16.000000000 +0100
@@ -372,6 +372,16 @@ ENTRY(name)				\
 /* The include is where all of the SMP etc. interrupts come from */
 #include "entry_arch.h"
 
+#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_PERFCTR)
+ENTRY(perfctr_interrupt)
+	pushl $LOCAL_PERFCTR_VECTOR-256
+	SAVE_ALL
+	pushl %esp
+	call smp_perfctr_interrupt
+	addl $4, %esp
+	jmp ret_from_intr
+#endif
+
 ENTRY(divide_error)
 	pushl $0			# no error code
 	pushl $do_divide_error
@@ -862,5 +872,11 @@ ENTRY(sys_call_table)
 	.long sys_add_key
 	.long sys_request_key
 	.long sys_keyctl
+	.long sys_ni_syscall	/* reserved for sys_ioprio_set */
+	.long sys_ni_syscall	/* reserved for sys_ioprio_get */	/* 290 */
+	.long sys_vperfctr_open
+	.long sys_vperfctr_control
+	.long sys_vperfctr_write
+	.long sys_vperfctr_read
 
 syscall_table_size=(.-sys_call_table)
--- linux-2.6.11.perfctr27/arch/i386/kernel/i8259.c.~1~	2005-03-02 19:24:14.000000000 +0100
+++ linux-2.6.11.perfctr27/arch/i386/kernel/i8259.c	2005-03-14 11:10:47.000000000 +0100
@@ -24,6 +24,7 @@
 #include <asm/apic.h>
 #include <asm/arch_hooks.h>
 #include <asm/i8259.h>
+#include <asm/perfctr.h>
 
 #include <linux/irq.h>
 
@@ -413,6 +414,8 @@ void __init init_IRQ(void)
 	 */
 	intr_init_hook();
 
+	perfctr_vector_init();
+
 	/*
 	 * Set the clock to HZ Hz, we already have a valid
 	 * vector now:
--- linux-2.6.11.perfctr27/arch/i386/kernel/process.c.~1~	2005-03-02 19:24:14.000000000 +0100
+++ linux-2.6.11.perfctr27/arch/i386/kernel/process.c	2005-03-14 11:10:47.000000000 +0100
@@ -32,6 +32,7 @@
 #include <linux/delay.h>
 #include <linux/reboot.h>
 #include <linux/init.h>
+#include <linux/perfctr.h>
 #include <linux/mc146818rtc.h>
 #include <linux/module.h>
 #include <linux/kallsyms.h>
@@ -339,6 +340,7 @@ void exit_thread(void)
 		tss->io_bitmap_base = INVALID_IO_BITMAP_OFFSET;
 		put_cpu();
 	}
+	perfctr_exit_thread(&tsk->thread);
 }
 
 void flush_thread(void)
@@ -400,6 +402,8 @@ int copy_thread(int nr, unsigned long cl
 	savesegment(fs,p->thread.fs);
 	savesegment(gs,p->thread.gs);
 
+	perfctr_copy_task(p, regs);
+
 	tsk = current;
 	if (unlikely(NULL != tsk->thread.io_bitmap_ptr)) {
 		p->thread.io_bitmap_ptr = kmalloc(IO_BITMAP_BYTES, GFP_KERNEL);
@@ -623,6 +627,8 @@ struct task_struct fastcall * __switch_t
 	if (unlikely(prev->io_bitmap_ptr || next->io_bitmap_ptr))
 		handle_io_bitmap(next, tss);
 
+	perfctr_resume_thread(next);
+
 	return prev_p;
 }
 
--- linux-2.6.11.perfctr27/arch/ppc/Kconfig.~1~	2005-03-02 19:24:14.000000000 +0100
+++ linux-2.6.11.perfctr27/arch/ppc/Kconfig	2005-03-14 11:10:47.000000000 +0100
@@ -245,6 +245,8 @@ config NOT_COHERENT_CACHE
 	depends on 4xx || 8xx
 	default y
 
+source "drivers/perfctr/Kconfig"
+
 endmenu
 
 menu "Platform options"
--- linux-2.6.11.perfctr27/arch/ppc/kernel/head.S.~1~	2004-10-19 13:01:17.000000000 +0200
+++ linux-2.6.11.perfctr27/arch/ppc/kernel/head.S	2005-03-14 11:10:47.000000000 +0100
@@ -502,7 +502,11 @@ SystemCall:
 Trap_0f:
 	EXCEPTION_PROLOG
 	addi	r3,r1,STACK_FRAME_OVERHEAD
+#ifdef CONFIG_PERFCTR_INTERRUPT_SUPPORT
+	EXC_XFER_EE(0xf00, do_perfctr_interrupt)
+#else
 	EXC_XFER_EE(0xf00, UnknownException)
+#endif
 
 /*
  * Handle TLB miss for instruction on 603/603e.
--- linux-2.6.11.perfctr27/arch/ppc/kernel/misc.S.~1~	2005-03-02 19:24:14.000000000 +0100
+++ linux-2.6.11.perfctr27/arch/ppc/kernel/misc.S	2005-03-14 11:14:05.000000000 +0100
@@ -1450,3 +1450,10 @@ _GLOBAL(sys_call_table)
 	.long sys_add_key
 	.long sys_request_key		/* 270 */
 	.long sys_keyctl
+	.long sys_ni_syscall		/* 272 reserved for sys_waitid */
+	.long sys_ni_syscall		/* 273 reserved for sys_ioprio_set */
+	.long sys_ni_syscall		/* 274 reserved for sys_ioprio_get */
+	.long sys_vperfctr_open		/* 275 */
+	.long sys_vperfctr_control
+	.long sys_vperfctr_write
+	.long sys_vperfctr_read
--- linux-2.6.11.perfctr27/arch/ppc/kernel/process.c.~1~	2005-03-02 19:24:14.000000000 +0100
+++ linux-2.6.11.perfctr27/arch/ppc/kernel/process.c	2005-03-14 11:10:47.000000000 +0100
@@ -35,6 +35,7 @@
 #include <linux/init_task.h>
 #include <linux/module.h>
 #include <linux/kallsyms.h>
+#include <linux/perfctr.h>
 #include <linux/mqueue.h>
 #include <linux/hardirq.h>
 
@@ -301,7 +302,9 @@ struct task_struct *__switch_to(struct t
 #endif /* CONFIG_SPE */
 	new_thread = &new->thread;
 	old_thread = &current->thread;
+	perfctr_suspend_thread(&prev->thread);
 	last = _switch(old_thread, new_thread);
+	perfctr_resume_thread(&current->thread);
 	local_irq_restore(s);
 	return last;
 }
@@ -363,6 +366,7 @@ void exit_thread(void)
 	if (last_task_used_spe == current)
 		last_task_used_spe = NULL;
 #endif
+	perfctr_exit_thread(&current->thread);
 }
 
 void flush_thread(void)
@@ -455,6 +459,8 @@ copy_thread(int nr, unsigned long clone_
 
 	p->thread.last_syscall = -1;
 
+	perfctr_copy_task(p, regs);
+
 	return 0;
 }
 
--- linux-2.6.11.perfctr27/arch/x86_64/Kconfig.~1~	2005-03-02 19:24:15.000000000 +0100
+++ linux-2.6.11.perfctr27/arch/x86_64/Kconfig	2005-03-14 11:10:47.000000000 +0100
@@ -350,6 +350,9 @@ config X86_MCE_INTEL
 	help
 	   Additional support for intel specific MCE features such as
 	   the thermal monitor.
+
+source "drivers/perfctr/Kconfig"
+
 endmenu
 
 #
--- linux-2.6.11.perfctr27/arch/x86_64/ia32/ia32entry.S.~1~	2005-03-02 19:24:15.000000000 +0100
+++ linux-2.6.11.perfctr27/arch/x86_64/ia32/ia32entry.S	2005-03-14 11:19:23.000000000 +0100
@@ -595,6 +595,12 @@ ia32_sys_call_table:
 	.quad sys_add_key
 	.quad sys_request_key
 	.quad sys_keyctl
+	.quad quiet_ni_syscall	/* reserved for sys_ioprio_set */
+	.quad quiet_ni_syscall	/* reserved for sys_ioprio_get */	/* 290 */
+	.quad sys_vperfctr_open
+	.quad sys_vperfctr_control
+	.quad sys_vperfctr_write
+	.quad sys_vperfctr_read
 	/* don't forget to change IA32_NR_syscalls */
 ia32_syscall_end:		
 	.rept IA32_NR_syscalls-(ia32_syscall_end-ia32_sys_call_table)/8
--- linux-2.6.11.perfctr27/arch/x86_64/kernel/entry.S.~1~	2005-03-02 19:24:15.000000000 +0100
+++ linux-2.6.11.perfctr27/arch/x86_64/kernel/entry.S	2005-03-14 11:10:47.000000000 +0100
@@ -562,6 +562,11 @@ ENTRY(spurious_interrupt)
 	apicinterrupt SPURIOUS_APIC_VECTOR,smp_spurious_interrupt
 #endif
 				
+#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_PERFCTR)
+ENTRY(perfctr_interrupt)
+	apicinterrupt LOCAL_PERFCTR_VECTOR,smp_perfctr_interrupt
+#endif
+
 /*
  * Exception entry points.
  */ 		
--- linux-2.6.11.perfctr27/arch/x86_64/kernel/i8259.c.~1~	2005-03-02 19:24:15.000000000 +0100
+++ linux-2.6.11.perfctr27/arch/x86_64/kernel/i8259.c	2005-03-14 11:10:47.000000000 +0100
@@ -24,6 +24,7 @@
 #include <asm/delay.h>
 #include <asm/desc.h>
 #include <asm/apic.h>
+#include <asm/perfctr.h>
 
 #include <linux/irq.h>
 
@@ -562,6 +563,8 @@ void __init init_IRQ(void)
 	set_intr_gate(ERROR_APIC_VECTOR, error_interrupt);
 #endif
 
+	perfctr_vector_init();
+
 	/*
 	 * Set the clock to HZ Hz, we already have a valid
 	 * vector now:
--- linux-2.6.11.perfctr27/arch/x86_64/kernel/process.c.~1~	2005-03-02 19:24:15.000000000 +0100
+++ linux-2.6.11.perfctr27/arch/x86_64/kernel/process.c	2005-03-14 11:10:47.000000000 +0100
@@ -32,6 +32,7 @@
 #include <linux/delay.h>
 #include <linux/irq.h>
 #include <linux/ptrace.h>
+#include <linux/perfctr.h>
 #include <linux/utsname.h>
 
 #include <asm/uaccess.h>
@@ -293,6 +294,7 @@ void exit_thread(void)
 		t->io_bitmap_max = 0;
 		put_cpu();
 	}
+	perfctr_exit_thread(&me->thread);
 }
 
 void flush_thread(void)
@@ -395,6 +397,8 @@ int copy_thread(int nr, unsigned long cl
 	asm("movl %%es,%0" : "=m" (p->thread.es));
 	asm("movl %%ds,%0" : "=m" (p->thread.ds));
 
+	perfctr_copy_task(p, regs);
+
 	if (unlikely(me->thread.io_bitmap_ptr != NULL)) { 
 		p->thread.io_bitmap_ptr = kmalloc(IO_BITMAP_BYTES, GFP_KERNEL);
 		if (!p->thread.io_bitmap_ptr) {
@@ -544,6 +548,8 @@ struct task_struct *__switch_to(struct t
 		}
 	}
 
+	perfctr_resume_thread(next);
+
 	return prev_p;
 }
 
--- linux-2.6.11.perfctr27/drivers/Makefile.~1~	2005-03-02 19:24:15.000000000 +0100
+++ linux-2.6.11.perfctr27/drivers/Makefile	2005-03-14 11:10:47.000000000 +0100
@@ -61,5 +61,6 @@ obj-$(CONFIG_EISA)		+= eisa/
 obj-$(CONFIG_CPU_FREQ)		+= cpufreq/
 obj-$(CONFIG_MMC)		+= mmc/
 obj-$(CONFIG_INFINIBAND)	+= infiniband/
+obj-$(CONFIG_PERFCTR)		+= perfctr/
 obj-y				+= firmware/
 obj-$(CONFIG_CRYPTO)		+= crypto/
--- linux-2.6.11.perfctr27/include/asm-i386/mach-default/irq_vectors.h.~1~	2004-05-10 11:14:37.000000000 +0200
+++ linux-2.6.11.perfctr27/include/asm-i386/mach-default/irq_vectors.h	2005-03-14 11:10:47.000000000 +0100
@@ -56,14 +56,15 @@
  * sources per level' errata.
  */
 #define LOCAL_TIMER_VECTOR	0xef
+#define LOCAL_PERFCTR_VECTOR	0xee
 
 /*
- * First APIC vector available to drivers: (vectors 0x30-0xee)
+ * First APIC vector available to drivers: (vectors 0x30-0xed)
  * we start at 0x31 to spread out vectors evenly between priority
  * 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
 
--- linux-2.6.11.perfctr27/include/asm-i386/mach-visws/irq_vectors.h.~1~	2004-01-09 13:19:11.000000000 +0100
+++ linux-2.6.11.perfctr27/include/asm-i386/mach-visws/irq_vectors.h	2005-03-14 11:10:47.000000000 +0100
@@ -35,14 +35,15 @@
  * sources per level' errata.
  */
 #define LOCAL_TIMER_VECTOR	0xef
+#define LOCAL_PERFCTR_VECTOR	0xee
 
 /*
- * First APIC vector available to drivers: (vectors 0x30-0xee)
+ * First APIC vector available to drivers: (vectors 0x30-0xed)
  * we start at 0x31 to spread out vectors evenly between priority
  * 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
 
--- linux-2.6.11.perfctr27/include/asm-i386/processor.h.~1~	2005-03-02 19:24:19.000000000 +0100
+++ linux-2.6.11.perfctr27/include/asm-i386/processor.h	2005-03-14 11:10:47.000000000 +0100
@@ -444,6 +444,8 @@ struct thread_struct {
 	unsigned long	*io_bitmap_ptr;
 /* max allowed port in the bitmap, in bytes: */
 	unsigned long	io_bitmap_max;
+/* performance counters */
+	struct vperfctr *perfctr;
 };
 
 #define INIT_THREAD  {							\
--- linux-2.6.11.perfctr27/include/asm-i386/system.h.~1~	2005-03-02 19:24:19.000000000 +0100
+++ linux-2.6.11.perfctr27/include/asm-i386/system.h	2005-03-14 11:10:47.000000000 +0100
@@ -14,6 +14,7 @@ extern struct task_struct * FASTCALL(__s
 
 #define switch_to(prev,next,last) do {					\
 	unsigned long esi,edi;						\
+	perfctr_suspend_thread(&(prev)->thread);			\
 	asm volatile("pushfl\n\t"					\
 		     "pushl %%ebp\n\t"					\
 		     "movl %%esp,%0\n\t"	/* save ESP */		\
--- linux-2.6.11.perfctr27/include/asm-i386/unistd.h.~1~	2004-12-25 12:16:22.000000000 +0100
+++ linux-2.6.11.perfctr27/include/asm-i386/unistd.h	2005-03-14 11:16:46.000000000 +0100
@@ -294,8 +294,12 @@
 #define __NR_add_key		286
 #define __NR_request_key	287
 #define __NR_keyctl		288
+#define __NR_vperfctr_open	291
+#define __NR_vperfctr_control	(__NR_vperfctr_open+1)
+#define __NR_vperfctr_write	(__NR_vperfctr_open+2)
+#define __NR_vperfctr_read	(__NR_vperfctr_open+3)
 
-#define NR_syscalls 289
+#define NR_syscalls 295
 
 /*
  * user-visible error numbers are in the range -1 - -128: see
--- linux-2.6.11.perfctr27/include/asm-ppc/processor.h.~1~	2005-03-02 19:24:19.000000000 +0100
+++ linux-2.6.11.perfctr27/include/asm-ppc/processor.h	2005-03-14 11:10:47.000000000 +0100
@@ -122,6 +122,9 @@ struct thread_struct {
 	unsigned long	spefscr;	/* SPE & eFP status */
 	int		used_spe;	/* set if process has used spe */
 #endif /* CONFIG_SPE */
+#ifdef CONFIG_PERFCTR_VIRTUAL
+	struct vperfctr *perfctr;	/* performance counters */
+#endif
 };
 
 #define ARCH_MIN_TASKALIGN 16
--- linux-2.6.11.perfctr27/include/asm-ppc/reg.h.~1~	2005-03-02 19:24:19.000000000 +0100
+++ linux-2.6.11.perfctr27/include/asm-ppc/reg.h	2005-03-14 11:10:47.000000000 +0100
@@ -273,22 +273,14 @@
 #define SPRN_LDSTCR	0x3f8	/* Load/Store control register */
 #define SPRN_LDSTDB	0x3f4	/* */
 #define SPRN_LR		0x008	/* Link Register */
-#define SPRN_MMCR0	0x3B8	/* Monitor Mode Control Register 0 */
-#define SPRN_MMCR1	0x3BC	/* Monitor Mode Control Register 1 */
 #ifndef SPRN_PIR
 #define SPRN_PIR	0x3FF	/* Processor Identification Register */
 #endif
-#define SPRN_PMC1	0x3B9	/* Performance Counter Register 1 */
-#define SPRN_PMC2	0x3BA	/* Performance Counter Register 2 */
-#define SPRN_PMC3	0x3BD	/* Performance Counter Register 3 */
-#define SPRN_PMC4	0x3BE	/* Performance Counter Register 4 */
 #define SPRN_PTEHI	0x3D5	/* 981 7450 PTE HI word (S/W TLB load) */
 #define SPRN_PTELO	0x3D6	/* 982 7450 PTE LO word (S/W TLB load) */
 #define SPRN_PVR	0x11F	/* Processor Version Register */
 #define SPRN_RPA	0x3D6	/* Required Physical Address Register */
-#define SPRN_SDA	0x3BF	/* Sampled Data Address Register */
 #define SPRN_SDR1	0x019	/* MMU Hash Base Register */
-#define SPRN_SIA	0x3BB	/* Sampled Instruction Address Register */
 #define SPRN_SPRG0	0x110	/* Special Purpose Register General 0 */
 #define SPRN_SPRG1	0x111	/* Special Purpose Register General 1 */
 #define SPRN_SPRG2	0x112	/* Special Purpose Register General 2 */
@@ -315,16 +307,79 @@
 #define SPRN_THRM3	0x3FE		/* Thermal Management Register 3 */
 #define THRM3_E		(1<<0)
 #define SPRN_TLBMISS	0x3D4		/* 980 7450 TLB Miss Register */
-#define SPRN_UMMCR0	0x3A8	/* User Monitor Mode Control Register 0 */
-#define SPRN_UMMCR1	0x3AC	/* User Monitor Mode Control Register 0 */
-#define SPRN_UPMC1	0x3A9	/* User Performance Counter Register 1 */
-#define SPRN_UPMC2	0x3AA	/* User Performance Counter Register 2 */
-#define SPRN_UPMC3	0x3AD	/* User Performance Counter Register 3 */
-#define SPRN_UPMC4	0x3AE	/* User Performance Counter Register 4 */
-#define SPRN_USIA	0x3AB	/* User Sampled Instruction Address Register */
 #define SPRN_VRSAVE	0x100	/* Vector Register Save Register */
 #define SPRN_XER	0x001	/* Fixed Point Exception Register */
 
+/* Performance-monitoring control and counter registers */
+#define SPRN_MMCR0	0x3B8	/* Monitor Mode Control Register 0 (604 and up) */
+#define SPRN_MMCR1	0x3BC	/* Monitor Mode Control Register 1 (604e and up) */
+#define SPRN_MMCR2	0x3B0	/* Monitor Mode Control Register 2 (7400 and up) */
+#define SPRN_PMC1	0x3B9	/* Performance Counter Register 1 (604 and up) */
+#define SPRN_PMC2	0x3BA	/* Performance Counter Register 2 (604 and up) */
+#define SPRN_PMC3	0x3BD	/* Performance Counter Register 3 (604e and up) */
+#define SPRN_PMC4	0x3BE	/* Performance Counter Register 4 (604e and up) */
+#define SPRN_PMC5	0x3B1	/* Performance Counter Register 5 (7450 and up) */
+#define SPRN_PMC6	0x3B2	/* Performance Counter Register 6 (7450 and up) */
+#define SPRN_SIA	0x3BB	/* Sampled Instruction Address Register (604 and up) */
+#define SPRN_SDA	0x3BF	/* Sampled Data Address Register (604/604e only) */
+#define SPRN_BAMR	0x3B7	/* Breakpoint Address Mask Register (7400 and up) */
+
+#define SPRN_UMMCR0	0x3A8	/* User Monitor Mode Control Register 0 (750 and up) */
+#define SPRN_UMMCR1	0x3AC	/* User Monitor Mode Control Register 0 (750 and up) */
+#define SPRN_UMMCR2	0x3A0	/* User Monitor Mode Control Register 0 (7400 and up) */
+#define SPRN_UPMC1	0x3A9	/* User Performance Counter Register 1 (750 and up) */
+#define SPRN_UPMC2	0x3AA	/* User Performance Counter Register 2 (750 and up) */
+#define SPRN_UPMC3	0x3AD	/* User Performance Counter Register 3 (750 and up) */
+#define SPRN_UPMC4	0x3AE	/* User Performance Counter Register 4 (750 and up) */
+#define SPRN_UPMC5	0x3A1	/* User Performance Counter Register 5 (7450 and up) */
+#define SPRN_UPMC6	0x3A2	/* User Performance Counter Register 5 (7450 and up) */
+#define SPRN_USIA	0x3AB	/* User Sampled Instruction Address Register (750 and up) */
+#define SPRN_UBAMR	0x3A7	/* User Breakpoint Address Mask Register (7400 and up) */
+
+/* MMCR0 layout (74xx terminology) */
+#define MMCR0_FC		0x80000000 /* Freeze counters unconditionally. */
+#define MMCR0_FCS		0x40000000 /* Freeze counters while MSR[PR]=0 (supervisor mode). */
+#define MMCR0_FCP		0x20000000 /* Freeze counters while MSR[PR]=1 (user mode). */
+#define MMCR0_FCM1		0x10000000 /* Freeze counters while MSR[PM]=1. */
+#define MMCR0_FCM0		0x08000000 /* Freeze counters while MSR[PM]=0. */
+#define MMCR0_PMXE		0x04000000 /* Enable performance monitor exceptions.
+					    * Cleared by hardware when a PM exception occurs.
+					    * 604: PMXE is not cleared by hardware.
+					    */
+#define MMCR0_FCECE		0x02000000 /* Freeze counters on enabled condition or event.
+					    * FCECE is treated as 0 if TRIGGER is 1.
+					    * 74xx: FC is set when the event occurs.
+					    * 604/750: ineffective when PMXE=0.
+					    */
+#define MMCR0_TBSEL		0x01800000 /* Time base lower (TBL) bit selector.
+					    * 00: bit 31, 01: bit 23, 10: bit 19, 11: bit 15.
+					    */
+#define MMCR0_TBEE		0x00400000 /* Enable event on TBL bit transition from 0 to 1. */
+#define MMCR0_THRESHOLD		0x003F0000 /* Threshold value for certain events. */
+#define MMCR0_PMC1CE		0x00008000 /* Enable event on PMC1 overflow. */
+#define MMCR0_PMCjCE		0x00004000 /* Enable event on PMC2-PMC6 overflow.
+					    * 604/750: Overrides FCECE (DISCOUNT).
+					    */
+#define MMCR0_TRIGGER		0x00002000 /* Disable PMC2-PMC6 until PMC1 overflow or other event.
+					    * 74xx: cleared by hardware when the event occurs.
+					    */
+#define MMCR0_PMC1SEL		0x00001FB0 /* PMC1 event selector, 7 bits. */
+#define MMCR0_PMC2SEL		0x0000003F /* PMC2 event selector, 6 bits. */
+
+/* MMCR1 layout (604e-7457) */
+#define MMCR1_PMC3SEL		0xF8000000 /* PMC3 event selector, 5 bits. */
+#define MMCR1_PMC4SEL		0x07B00000 /* PMC4 event selector, 5 bits. */
+#define MMCR1_PMC5SEL		0x003E0000 /* PMC5 event selector, 5 bits. (745x only) */
+#define MMCR1_PMC6SEL		0x0001F800 /* PMC6 event selector, 6 bits. (745x only) */
+#define MMCR1__RESERVED		0x000007FF /* should be zero */
+
+/* MMCR2 layout (7400-7457) */
+#define MMCR2_THRESHMULT	0x80000000 /* MMCR0[THRESHOLD] multiplier. */
+#define MMCR2_SMCNTEN		0x40000000 /* 7400/7410 only, should be zero. */
+#define MMCR2_SMINTEN		0x20000000 /* 7400/7410 only, should be zero. */
+#define MMCR2__RESERVED		0x1FFFFFFF /* should be zero */
+#define MMCR2_RESERVED		(MMCR2_SMCNTEN | MMCR2_SMINTEN | MMCR2__RESERVED)
+
 /* Bit definitions for MMCR0 and PMC1 / PMC2. */
 #define MMCR0_PMC1_CYCLES	(1 << 7)
 #define MMCR0_PMC1_ICACHEMISS	(5 << 7)
@@ -333,7 +388,6 @@
 #define MMCR0_PMC2_CYCLES	0x1
 #define MMCR0_PMC2_ITLB		0x7
 #define MMCR0_PMC2_LOADMISSTIME	0x5
-#define MMCR0_PMXE	(1 << 26)
 
 /* Short-hand versions for a number of the above SPRNs */
 #define CTR	SPRN_CTR	/* Counter Register */
--- linux-2.6.11.perfctr27/include/asm-ppc/unistd.h.~1~	2005-03-02 19:24:19.000000000 +0100
+++ linux-2.6.11.perfctr27/include/asm-ppc/unistd.h	2005-03-14 11:12:17.000000000 +0100
@@ -276,8 +276,12 @@
 #define __NR_add_key		269
 #define __NR_request_key	270
 #define __NR_keyctl		271
+#define __NR_vperfctr_open	275
+#define __NR_vperfctr_control	(__NR_vperfctr_open+1)
+#define __NR_vperfctr_write	(__NR_vperfctr_open+2)
+#define __NR_vperfctr_read	(__NR_vperfctr_open+3)
 
-#define __NR_syscalls		272
+#define __NR_syscalls		279
 
 #define __NR(n)	#n
 
--- linux-2.6.11.perfctr27/include/asm-x86_64/hw_irq.h.~1~	2005-03-02 19:24:19.000000000 +0100
+++ linux-2.6.11.perfctr27/include/asm-x86_64/hw_irq.h	2005-03-14 11:10:47.000000000 +0100
@@ -65,14 +65,15 @@ struct hw_interrupt_type;
  * sources per level' errata.
  */
 #define LOCAL_TIMER_VECTOR	0xef
+#define LOCAL_PERFCTR_VECTOR	0xee
 
 /*
- * First APIC vector available to drivers: (vectors 0x30-0xee)
+ * First APIC vector available to drivers: (vectors 0x30-0xed)
  * we start at 0x31 to spread out vectors evenly between priority
  * levels. (0x80 is the syscall vector)
  */
 #define FIRST_DEVICE_VECTOR	0x31
-#define FIRST_SYSTEM_VECTOR	0xef   /* duplicated in irq.h */
+#define FIRST_SYSTEM_VECTOR	0xee   /* duplicated in irq.h */
 
 
 #ifndef __ASSEMBLY__
--- linux-2.6.11.perfctr27/include/asm-x86_64/ia32_unistd.h.~1~	2005-03-02 19:24:19.000000000 +0100
+++ linux-2.6.11.perfctr27/include/asm-x86_64/ia32_unistd.h	2005-03-14 11:20:08.000000000 +0100
@@ -294,7 +294,11 @@
 #define __NR_ia32_add_key		286
 #define __NR_ia32_request_key	287
 #define __NR_ia32_keyctl		288
+#define __NR_ia32_vperfctr_open		291
+#define __NR_ia32_vperfctr_control	(__NR_ia32_vperfctr_open+1)
+#define __NR_ia32_vperfctr_write	(__NR_ia32_vperfctr_open+2)
+#define __NR_ia32_vperfctr_read		(__NR_ia32_vperfctr_open+3)
 
-#define IA32_NR_syscalls 290	/* must be > than biggest syscall! */
+#define IA32_NR_syscalls 295	/* must be > than biggest syscall! */
 
 #endif /* _ASM_X86_64_IA32_UNISTD_H_ */
--- linux-2.6.11.perfctr27/include/asm-x86_64/irq.h.~1~	2004-12-25 12:16:24.000000000 +0100
+++ linux-2.6.11.perfctr27/include/asm-x86_64/irq.h	2005-03-14 11:10:47.000000000 +0100
@@ -29,7 +29,7 @@
  */
 #define NR_VECTORS 256
 
-#define FIRST_SYSTEM_VECTOR	0xef   /* duplicated in hw_irq.h */
+#define FIRST_SYSTEM_VECTOR	0xee   /* duplicated in hw_irq.h */
 
 #ifdef CONFIG_PCI_MSI
 #define NR_IRQS FIRST_SYSTEM_VECTOR
--- linux-2.6.11.perfctr27/include/asm-x86_64/processor.h.~1~	2005-03-02 19:24:19.000000000 +0100
+++ linux-2.6.11.perfctr27/include/asm-x86_64/processor.h	2005-03-14 11:10:47.000000000 +0100
@@ -253,6 +253,8 @@ struct thread_struct {
 	unsigned io_bitmap_max;
 /* cached TLS descriptors. */
 	u64 tls_array[GDT_ENTRY_TLS_ENTRIES];
+/* performance counters */
+	struct vperfctr *perfctr;
 } __attribute__((aligned(16)));
 
 #define INIT_THREAD  {}
--- linux-2.6.11.perfctr27/include/asm-x86_64/system.h.~1~	2005-03-02 19:24:19.000000000 +0100
+++ linux-2.6.11.perfctr27/include/asm-x86_64/system.h	2005-03-14 11:10:47.000000000 +0100
@@ -26,7 +26,8 @@
 #define __EXTRA_CLOBBER  \
 	,"rcx","rbx","rdx","r8","r9","r10","r11","r12","r13","r14","r15"
 
-#define switch_to(prev,next,last) \
+#define switch_to(prev,next,last) do { \
+	perfctr_suspend_thread(&(prev)->thread); \
 	asm volatile(SAVE_CONTEXT						    \
 		     "movq %%rsp,%P[threadrsp](%[prev])\n\t" /* save RSP */	  \
 		     "movq %P[threadrsp](%[next]),%%rsp\n\t" /* restore RSP */	  \
@@ -46,7 +47,8 @@
 		       [tif_fork] "i" (TIF_FORK),			  \
 		       [thread_info] "i" (offsetof(struct task_struct, thread_info)), \
 		       [pda_pcurrent] "i" (offsetof(struct x8664_pda, pcurrent))   \
-		     : "memory", "cc" __EXTRA_CLOBBER)
+		     : "memory", "cc" __EXTRA_CLOBBER); \
+} while (0)
     
 extern void load_gs_index(unsigned); 
 
--- linux-2.6.11.perfctr27/include/asm-x86_64/unistd.h.~1~	2005-03-02 19:24:19.000000000 +0100
+++ linux-2.6.11.perfctr27/include/asm-x86_64/unistd.h	2005-03-14 11:16:05.000000000 +0100
@@ -563,8 +563,20 @@ __SYSCALL(__NR_add_key, sys_add_key)
 __SYSCALL(__NR_request_key, sys_request_key)
 #define __NR_keyctl		250
 __SYSCALL(__NR_keyctl, sys_keyctl)
+#define __NR_ioprio_set		251
+__SYSCALL(__NR_ioprio_set, sys_ni_syscall)
+#define __NR_ioprio_get		252
+__SYSCALL(__NR_ioprio_get, sys_ni_syscall)
+#define __NR_vperfctr_open	253
+__SYSCALL(__NR_vperfctr_open, sys_vperfctr_open)
+#define __NR_vperfctr_control	(__NR_vperfctr_open+1)
+__SYSCALL(__NR_vperfctr_control, sys_vperfctr_control)
+#define __NR_vperfctr_write	(__NR_vperfctr_open+2)
+__SYSCALL(__NR_vperfctr_write, sys_vperfctr_write)
+#define __NR_vperfctr_read	(__NR_vperfctr_open+3)
+__SYSCALL(__NR_vperfctr_read, sys_vperfctr_read)
 
-#define __NR_syscall_max __NR_keyctl
+#define __NR_syscall_max __NR_vperfctr_read
 #ifndef __NO_STUBS
 
 /* user-visible error numbers are in the range -1 - -4095 */
--- linux-2.6.11.perfctr27/include/linux/sched.h.~1~	2005-03-02 19:24:19.000000000 +0100
+++ linux-2.6.11.perfctr27/include/linux/sched.h	2005-03-14 11:10:47.000000000 +0100
@@ -1035,6 +1035,9 @@ extern void unhash_process(struct task_s
  * Protects ->fs, ->files, ->mm, ->ptrace, ->group_info, ->comm, keyring
  * subscriptions and synchronises with wait4().  Also used in procfs.
  *
+ * Synchronises set_cpus_allowed(), unlink, and creat of ->thread.perfctr.
+ * [if CONFIG_PERFCTR_VIRTUAL]
+ *
  * Nests both inside and outside of read_lock(&tasklist_lock).
  * It must not be nested with write_lock_irq(&tasklist_lock),
  * neither inside nor outside.
--- linux-2.6.11.perfctr27/kernel/exit.c.~1~	2005-03-02 19:24:20.000000000 +0100
+++ linux-2.6.11.perfctr27/kernel/exit.c	2005-03-14 11:10:47.000000000 +0100
@@ -25,6 +25,7 @@
 #include <linux/mount.h>
 #include <linux/proc_fs.h>
 #include <linux/mempolicy.h>
+#include <linux/perfctr.h>
 #include <linux/syscalls.h>
 
 #include <asm/uaccess.h>
@@ -91,6 +92,7 @@ repeat: 
 		zap_leader = (leader->exit_signal == -1);
 	}
 
+	perfctr_release_task(p);
 	sched_exit(p);
 	write_unlock_irq(&tasklist_lock);
 	spin_unlock(&p->proc_lock);
--- linux-2.6.11.perfctr27/kernel/sched.c.~1~	2005-03-02 19:24:20.000000000 +0100
+++ linux-2.6.11.perfctr27/kernel/sched.c	2005-03-14 11:10:47.000000000 +0100
@@ -41,6 +41,7 @@
 #include <linux/rcupdate.h>
 #include <linux/cpu.h>
 #include <linux/percpu.h>
+#include <linux/perfctr.h>
 #include <linux/kthread.h>
 #include <linux/seq_file.h>
 #include <linux/syscalls.h>
@@ -4115,6 +4116,8 @@ int set_cpus_allowed(task_t *p, cpumask_
 	migration_req_t req;
 	runqueue_t *rq;
 
+	perfctr_set_cpus_allowed(p, new_mask);
+
 	rq = task_rq_lock(p, &flags);
 	if (!cpus_intersects(new_mask, cpu_online_map)) {
 		ret = -EINVAL;
--- linux-2.6.11.perfctr27/kernel/sys_ni.c.~1~	2005-03-02 19:24:20.000000000 +0100
+++ linux-2.6.11.perfctr27/kernel/sys_ni.c	2005-03-14 11:10:47.000000000 +0100
@@ -83,3 +83,8 @@ cond_syscall(sys_pciconfig_write)
 cond_syscall(sys_pciconfig_iobase)
 cond_syscall(sys32_ipc)
 cond_syscall(sys32_sysctl)
+
+cond_syscall(sys_vperfctr_open)
+cond_syscall(sys_vperfctr_control)
+cond_syscall(sys_vperfctr_write)
+cond_syscall(sys_vperfctr_read)
--- linux-2.6.11.perfctr27/kernel/timer.c.~1~	2005-03-02 19:24:20.000000000 +0100
+++ linux-2.6.11.perfctr27/kernel/timer.c	2005-03-14 11:10:47.000000000 +0100
@@ -31,6 +31,7 @@
 #include <linux/time.h>
 #include <linux/jiffies.h>
 #include <linux/cpu.h>
+#include <linux/perfctr.h>
 #include <linux/syscalls.h>
 
 #include <asm/uaccess.h>
@@ -820,6 +821,7 @@ void update_process_times(int user_tick)
 		account_user_time(p, jiffies_to_cputime(1));
 	else
 		account_system_time(p, HARDIRQ_OFFSET, jiffies_to_cputime(1));
+	perfctr_sample_thread(&p->thread);
 	run_local_timers();
 	if (rcu_pending(cpu))
 		rcu_check_callbacks(cpu, user_tick);
