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List: linux-kernel
Subject: [PATCH][2/6] perfctr-2.7.3 for 2.6.7-rc1-mm1: i386
From: Mikael Pettersson <mikpe () csd ! uu ! se>
Date: 2004-05-31 22:19:06
Message-ID: 200405312219.i4VMJ6dS012296 () harpo ! it ! uu ! se
[Download RAW message or body]
perfctr-2.7.3 for 2.6.7-rc1-mm1, part 2/6:
- i386 driver and arch changes
arch/i386/Kconfig | 2
arch/i386/kernel/entry.S | 16
arch/i386/kernel/i8259.c | 3
arch/i386/kernel/process.c | 9
drivers/perfctr/x86.c | 1626 ++++++++++++++++++++++++++++
drivers/perfctr/x86_tests.c | 275 ++++
drivers/perfctr/x86_tests.h | 30
include/asm-i386/mach-default/irq_vectors.h | 5
include/asm-i386/mach-pc9800/irq_vectors.h | 5
include/asm-i386/mach-visws/irq_vectors.h | 5
include/asm-i386/perfctr.h | 200 +++
include/asm-i386/processor.h | 2
include/asm-i386/unistd.h | 8
13 files changed, 2179 insertions(+), 7 deletions(-)
diff -ruN linux-2.6.7-rc1-mm1/arch/i386/Kconfig linux-2.6.7-rc1-mm1.perfctr-2.7.3.i386/arch/i386/Kconfig
--- linux-2.6.7-rc1-mm1/arch/i386/Kconfig 2004-05-30 15:59:30.000000000 +0200
+++ linux-2.6.7-rc1-mm1.perfctr-2.7.3.i386/arch/i386/Kconfig 2004-05-31 23:45:13.692821000 +0200
@@ -852,6 +852,8 @@
config REGPARM
def_bool y
+source "drivers/perfctr/Kconfig"
+
endmenu
diff -ruN linux-2.6.7-rc1-mm1/arch/i386/kernel/entry.S \
linux-2.6.7-rc1-mm1.perfctr-2.7.3.i386/arch/i386/kernel/entry.S
--- linux-2.6.7-rc1-mm1/arch/i386/kernel/entry.S 2004-05-30 15:59:30.000000000 +0200
+++ linux-2.6.7-rc1-mm1.perfctr-2.7.3.i386/arch/i386/kernel/entry.S 2004-05-31 23:45:13.692821000 +0200
@@ -432,6 +432,16 @@
/* 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
@@ -912,5 +922,11 @@
.long sys_mq_notify
.long sys_mq_getsetattr
.long sys_ni_syscall /* reserved for kexec */
+ .long sys_perfctr_info
+ .long sys_vperfctr_open
+ .long sys_vperfctr_control
+ .long sys_vperfctr_unlink
+ .long sys_vperfctr_iresume
+ .long sys_vperfctr_read
syscall_table_size=(.-sys_call_table)
diff -ruN linux-2.6.7-rc1-mm1/arch/i386/kernel/i8259.c \
linux-2.6.7-rc1-mm1.perfctr-2.7.3.i386/arch/i386/kernel/i8259.c
--- linux-2.6.7-rc1-mm1/arch/i386/kernel/i8259.c 2004-05-30 15:59:30.000000000 +0200
+++ linux-2.6.7-rc1-mm1.perfctr-2.7.3.i386/arch/i386/kernel/i8259.c 2004-05-31 23:45:13.692821000 +0200
@@ -23,6 +23,7 @@
#include <asm/apic.h>
#include <asm/arch_hooks.h>
#include <asm/i8259.h>
+#include <asm/perfctr.h>
#include <linux/irq.h>
@@ -427,6 +428,8 @@
*/
intr_init_hook();
+ perfctr_vector_init();
+
/*
* Set the clock to HZ Hz, we already have a valid
* vector now:
diff -ruN linux-2.6.7-rc1-mm1/arch/i386/kernel/process.c \
linux-2.6.7-rc1-mm1.perfctr-2.7.3.i386/arch/i386/kernel/process.c
--- linux-2.6.7-rc1-mm1/arch/i386/kernel/process.c 2004-05-30 15:59:30.000000000 +0200
+++ linux-2.6.7-rc1-mm1.perfctr-2.7.3.i386/arch/i386/kernel/process.c 2004-05-31 23:45:13.692821000 +0200
@@ -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>
@@ -304,6 +305,7 @@
tss->io_bitmap_base = INVALID_IO_BITMAP_OFFSET;
put_cpu();
}
+ perfctr_exit_thread(&tsk->thread);
}
void flush_thread(void)
@@ -366,6 +368,8 @@
savesegment(fs,p->thread.fs);
savesegment(gs,p->thread.gs);
+ perfctr_copy_thread(&p->thread);
+
tsk = current;
if (unlikely(NULL != tsk->thread.io_bitmap_ptr)) {
p->thread.io_bitmap_ptr = kmalloc(IO_BITMAP_BYTES, GFP_KERNEL);
@@ -511,6 +515,8 @@
/* never put a printk in __switch_to... printk() calls wake_up*() indirectly */
+ perfctr_suspend_thread(prev);
+
__unlazy_fpu(prev_p);
/*
@@ -573,6 +579,9 @@
*/
tss->io_bitmap_base = INVALID_IO_BITMAP_OFFSET;
}
+
+ perfctr_resume_thread(next);
+
return prev_p;
}
diff -ruN linux-2.6.7-rc1-mm1/drivers/perfctr/x86.c \
linux-2.6.7-rc1-mm1.perfctr-2.7.3.i386/drivers/perfctr/x86.c
--- linux-2.6.7-rc1-mm1/drivers/perfctr/x86.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.7-rc1-mm1.perfctr-2.7.3.i386/drivers/perfctr/x86.c 2004-05-31 23:45:13.692821000 +0200
@@ -0,0 +1,1626 @@
+/* $Id: x86.c,v 1.141 2004/05/31 18:13:42 mikpe Exp $
+ * x86/x86_64 performance-monitoring counters driver.
+ *
+ * Copyright (C) 1999-2004 Mikael Pettersson
+ */
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/perfctr.h>
+
+#include <asm/msr.h>
+#undef MSR_P6_PERFCTR0
+#undef MSR_IA32_MISC_ENABLE
+#include <asm/fixmap.h>
+#include <asm/apic.h>
+struct hw_interrupt_type;
+#include <asm/hw_irq.h>
+#include <asm/timex.h> /* cpu_khz */
+
+#include "cpumask.h"
+#include "x86_tests.h"
+
+/* Support for lazy evntsel and perfctr MSR updates. */
+struct per_cpu_cache { /* roughly a subset of perfctr_cpu_state */
+ union {
+ unsigned int p5_cesr;
+ unsigned int id; /* cache owner id */
+ } k1;
+ struct {
+ /* NOTE: these caches have physical indices, not virtual */
+ unsigned int evntsel[18];
+ unsigned int escr[0x3E2-0x3A0];
+ unsigned int pebs_enable;
+ unsigned int pebs_matrix_vert;
+ } control;
+} ____cacheline_aligned;
+static DEFINE_PER_CPU(struct per_cpu_cache, per_cpu_cache);
+
+/* Structure for counter snapshots, as 32-bit values. */
+struct perfctr_low_ctrs {
+ unsigned int tsc;
+ unsigned int pmc[18];
+};
+
+/* Intel P5, Cyrix 6x86MX/MII/III, Centaur WinChip C6/2/3 */
+#define MSR_P5_CESR 0x11
+#define MSR_P5_CTR0 0x12 /* .. 0x13 */
+#define P5_CESR_CPL 0x00C0
+#define P5_CESR_RESERVED (~0x01FF)
+#define MII_CESR_RESERVED (~0x05FF)
+#define C6_CESR_RESERVED (~0x00FF)
+
+/* Intel P6, VIA C3 */
+#define MSR_P6_PERFCTR0 0xC1 /* .. 0xC2 */
+#define MSR_P6_EVNTSEL0 0x186 /* .. 0x187 */
+#define P6_EVNTSEL_ENABLE 0x00400000
+#define P6_EVNTSEL_INT 0x00100000
+#define P6_EVNTSEL_CPL 0x00030000
+#define P6_EVNTSEL_RESERVED 0x00280000
+#define VC3_EVNTSEL1_RESERVED (~0x1FF)
+
+/* AMD K7 */
+#define MSR_K7_EVNTSEL0 0xC0010000 /* .. 0xC0010003 */
+#define MSR_K7_PERFCTR0 0xC0010004 /* .. 0xC0010007 */
+
+/* Intel P4, Intel Pentium M */
+#define MSR_IA32_MISC_ENABLE 0x1A0
+#define MSR_IA32_MISC_ENABLE_PERF_AVAIL (1<<7) /* read-only status bit */
+#define MSR_IA32_MISC_ENABLE_PEBS_UNAVAIL (1<<12) /* read-only status bit */
+
+/* Intel P4 */
+#define MSR_P4_PERFCTR0 0x300 /* .. 0x311 */
+#define MSR_P4_CCCR0 0x360 /* .. 0x371 */
+#define MSR_P4_ESCR0 0x3A0 /* .. 0x3E1, with some gaps */
+
+#define MSR_P4_PEBS_ENABLE 0x3F1
+#define P4_PE_REPLAY_TAG_BITS 0x00000607
+#define P4_PE_UOP_TAG 0x01000000
+#define P4_PE_RESERVED 0xFEFFF9F8 /* only allow ReplayTagging */
+
+#define MSR_P4_PEBS_MATRIX_VERT 0x3F2
+#define P4_PMV_REPLAY_TAG_BITS 0x00000003
+#define P4_PMV_RESERVED 0xFFFFFFFC
+
+#define P4_CCCR_OVF 0x80000000
+#define P4_CCCR_CASCADE 0x40000000
+#define P4_CCCR_OVF_PMI_T1 0x08000000
+#define P4_CCCR_OVF_PMI_T0 0x04000000
+#define P4_CCCR_FORCE_OVF 0x02000000
+#define P4_CCCR_ACTIVE_THREAD 0x00030000
+#define P4_CCCR_ENABLE 0x00001000
+#define P4_CCCR_ESCR_SELECT(X) (((X) >> 13) & 0x7)
+#define P4_CCCR_EXTENDED_CASCADE 0x00000800
+#define P4_CCCR_RESERVED (0x300007FF|P4_CCCR_OVF|P4_CCCR_OVF_PMI_T1)
+
+#define P4_ESCR_CPL_T1 0x00000003
+#define P4_ESCR_CPL_T0 0x0000000C
+#define P4_ESCR_TAG_ENABLE 0x00000010
+#define P4_ESCR_RESERVED (0x80000000)
+
+#define P4_FAST_RDPMC 0x80000000
+#define P4_MASK_FAST_RDPMC 0x0000001F /* we only need low 5 bits */
+
+/* missing from <asm-i386/cpufeature.h> */
+#define cpu_has_msr boot_cpu_has(X86_FEATURE_MSR)
+
+#define rdmsr_low(msr,low) \
+ __asm__ __volatile__("rdmsr" : "=a"(low) : "c"(msr) : "edx")
+#define rdpmc_low(ctr,low) \
+ __asm__ __volatile__("rdpmc" : "=a"(low) : "c"(ctr) : "edx")
+
+static void clear_msr_range(unsigned int base, unsigned int n)
+{
+ unsigned int i;
+
+ for(i = 0; i < n; ++i)
+ wrmsr(base+i, 0, 0);
+}
+
+static inline void set_in_cr4_local(unsigned int mask)
+{
+ write_cr4(read_cr4() | mask);
+}
+
+static inline void clear_in_cr4_local(unsigned int mask)
+{
+ write_cr4(read_cr4() & ~mask);
+}
+
+static unsigned int new_id(void)
+{
+ static spinlock_t lock = SPIN_LOCK_UNLOCKED;
+ static unsigned int counter;
+ int id;
+
+ spin_lock(&lock);
+ id = ++counter;
+ spin_unlock(&lock);
+ return id;
+}
+
+#if PERFCTR_INTERRUPT_SUPPORT
+static void perfctr_default_ihandler(unsigned long pc)
+{
+}
+
+static perfctr_ihandler_t perfctr_ihandler = perfctr_default_ihandler;
+
+asmlinkage void smp_perfctr_interrupt(struct pt_regs *regs)
+{
+ /* PREEMPT note: invoked via an interrupt gate, which
+ masks interrupts. We're still on the originating CPU. */
+ /* XXX: recursive interrupts? delay the ACK, mask LVTPC, or queue? */
+ ack_APIC_irq();
+ irq_enter();
+ (*perfctr_ihandler)(instruction_pointer(regs));
+ irq_exit();
+}
+
+void perfctr_cpu_set_ihandler(perfctr_ihandler_t ihandler)
+{
+ perfctr_ihandler = ihandler ? ihandler : perfctr_default_ihandler;
+}
+
+#else
+#define perfctr_cstatus_has_ictrs(cstatus) 0
+#undef cpu_has_apic
+#define cpu_has_apic 0
+#undef apic_write
+#define apic_write(reg,vector) do{}while(0)
+#endif
+
+#if defined(CONFIG_SMP) && PERFCTR_INTERRUPT_SUPPORT
+
+static inline void
+set_isuspend_cpu(struct perfctr_cpu_state *state, int cpu)
+{
+ state->k1.isuspend_cpu = cpu;
+}
+
+static inline int
+is_isuspend_cpu(const struct perfctr_cpu_state *state, int cpu)
+{
+ return state->k1.isuspend_cpu == cpu;
+}
+
+static inline void clear_isuspend_cpu(struct perfctr_cpu_state *state)
+{
+ state->k1.isuspend_cpu = NR_CPUS;
+}
+
+#else
+static inline void set_isuspend_cpu(struct perfctr_cpu_state *state, int cpu) { }
+static inline int is_isuspend_cpu(const struct perfctr_cpu_state *state, int cpu) { return 1; }
+static inline void clear_isuspend_cpu(struct perfctr_cpu_state *state) { }
+#endif
+
+/****************************************************************
+ * *
+ * Driver procedures. *
+ * *
+ ****************************************************************/
+
+/*
+ * Intel P5 family (Pentium, family code 5).
+ * - One TSC and two 40-bit PMCs.
+ * - A single 32-bit CESR (MSR 0x11) controls both PMCs.
+ * CESR has two halves, each controlling one PMC.
+ * To keep the API reasonably clean, the user puts 16 bits of
+ * control data in each counter's evntsel; the driver combines
+ * these to a single 32-bit CESR value.
+ * - Overflow interrupts are not available.
+ * - Pentium MMX added the RDPMC instruction. RDPMC has lower
+ * overhead than RDMSR and it can be used in user-mode code.
+ * - The MMX events are not symmetric: some events are only available
+ * for some PMC, and some event codes denote different events
+ * depending on which PMCs they control.
+ */
+
+/* shared with MII and C6 */
+static int p5_like_check_control(struct perfctr_cpu_state *state,
+ unsigned int reserved_bits, int is_c6)
+{
+ unsigned short cesr_half[2];
+ unsigned int pmc, evntsel, i;
+
+ if (state->control.nrictrs != 0 || state->control.nractrs > 2)
+ return -EINVAL;
+ cesr_half[0] = 0;
+ cesr_half[1] = 0;
+ for(i = 0; i < state->control.nractrs; ++i) {
+ pmc = state->control.pmc_map[i];
+ state->pmc[i].map = pmc;
+ if (pmc > 1 || cesr_half[pmc] != 0)
+ return -EINVAL;
+ evntsel = state->control.evntsel[i];
+ /* protect reserved bits */
+ if ((evntsel & reserved_bits) != 0)
+ return -EPERM;
+ /* the CPL field (if defined) must be non-zero */
+ if (!is_c6 && !(evntsel & P5_CESR_CPL))
+ return -EINVAL;
+ cesr_half[pmc] = evntsel;
+ }
+ state->k1.id = (cesr_half[1] << 16) | cesr_half[0];
+ return 0;
+}
+
+static int p5_check_control(struct perfctr_cpu_state *state, int is_global)
+{
+ return p5_like_check_control(state, P5_CESR_RESERVED, 0);
+}
+
+/* shared with MII but not C6 */
+static void p5_write_control(const struct perfctr_cpu_state *state)
+{
+ struct per_cpu_cache *cache;
+ unsigned int cesr;
+
+ cesr = state->k1.id;
+ if (!cesr) /* no PMC is on (this test doesn't work on C6) */
+ return;
+ cache = &__get_cpu_var(per_cpu_cache);
+ if (cache->k1.p5_cesr != cesr) {
+ cache->k1.p5_cesr = cesr;
+ wrmsr(MSR_P5_CESR, cesr, 0);
+ }
+}
+
+static void p5_read_counters(const struct perfctr_cpu_state *state,
+ struct perfctr_low_ctrs *ctrs)
+{
+ unsigned int cstatus, nrctrs, i;
+
+ /* The P5 doesn't allocate a cache line on a write miss, so do
+ a dummy read to avoid a write miss here _and_ a read miss
+ later in our caller. */
+ asm("" : : "r"(ctrs->tsc));
+
+ cstatus = state->cstatus;
+ if (perfctr_cstatus_has_tsc(cstatus))
+ rdtscl(ctrs->tsc);
+ nrctrs = perfctr_cstatus_nractrs(cstatus);
+ for(i = 0; i < nrctrs; ++i) {
+ unsigned int pmc = state->pmc[i].map;
+ rdmsr_low(MSR_P5_CTR0+pmc, ctrs->pmc[i]);
+ }
+}
+
+/* used by all except pre-MMX P5 */
+static void rdpmc_read_counters(const struct perfctr_cpu_state *state,
+ struct perfctr_low_ctrs *ctrs)
+{
+ unsigned int cstatus, nrctrs, i;
+
+ cstatus = state->cstatus;
+ if (perfctr_cstatus_has_tsc(cstatus))
+ rdtscl(ctrs->tsc);
+ nrctrs = perfctr_cstatus_nractrs(cstatus);
+ for(i = 0; i < nrctrs; ++i) {
+ unsigned int pmc = state->pmc[i].map;
+ rdpmc_low(pmc, ctrs->pmc[i]);
+ }
+}
+
+/* shared with MII and C6 */
+static void p5_clear_counters(void)
+{
+ clear_msr_range(MSR_P5_CESR, 1+2);
+}
+
+/*
+ * Cyrix 6x86/MII/III.
+ * - Same MSR assignments as P5 MMX. Has RDPMC and two 48-bit PMCs.
+ * - Event codes and CESR formatting as in the plain P5 subset.
+ * - Many but not all P5 MMX event codes are implemented.
+ * - Cyrix adds a few more event codes. The event code is widened
+ * to 7 bits, and Cyrix puts the high bit in CESR bit 10
+ * (and CESR bit 26 for PMC1).
+ */
+
+static int mii_check_control(struct perfctr_cpu_state *state, int is_global)
+{
+ return p5_like_check_control(state, MII_CESR_RESERVED, 0);
+}
+
+/*
+ * Centaur WinChip C6/2/3.
+ * - Same MSR assignments as P5 MMX. Has RDPMC and two 40-bit PMCs.
+ * - CESR is formatted with two halves, like P5. However, there
+ * are no defined control fields for e.g. CPL selection, and
+ * there is no defined method for stopping the counters.
+ * - Only a few event codes are defined.
+ * - The 64-bit TSC is synthesised from the low 32 bits of the
+ * two PMCs, and CESR has to be set up appropriately.
+ * Reprogramming CESR causes RDTSC to yield invalid results.
+ * (The C6 may also hang in this case, due to C6 erratum I-13.)
+ * Therefore, using the PMCs on any of these processors requires
+ * that the TSC is not accessed at all:
+ * 1. The kernel must be configured or a TSC-less processor, i.e.
+ * generic 586 or less.
+ * 2. The "notsc" boot parameter must be passed to the kernel.
+ * 3. User-space libraries and code must also be configured and
+ * compiled for a generic 586 or less.
+ */
+
+#if !defined(CONFIG_X86_TSC)
+static int c6_check_control(struct perfctr_cpu_state *state, int is_global)
+{
+ if (state->control.tsc_on)
+ return -EINVAL;
+ return p5_like_check_control(state, C6_CESR_RESERVED, 1);
+}
+
+static void c6_write_control(const struct perfctr_cpu_state *state)
+{
+ struct per_cpu_cache *cache;
+ unsigned int cesr;
+
+ if (perfctr_cstatus_nractrs(state->cstatus) == 0) /* no PMC is on */
+ return;
+ cache = &__get_cpu_var(per_cpu_cache);
+ cesr = state->k1.id;
+ if (cache->k1.p5_cesr != cesr) {
+ cache->k1.p5_cesr = cesr;
+ wrmsr(MSR_P5_CESR, cesr, 0);
+ }
+}
+#endif
+
+/*
+ * Intel P6 family (Pentium Pro, Pentium II, and Pentium III cores,
+ * and Xeon and Celeron versions of Pentium II and III cores).
+ * - One TSC and two 40-bit PMCs.
+ * - One 32-bit EVNTSEL MSR for each PMC.
+ * - EVNTSEL0 contains a global enable/disable bit.
+ * That bit is reserved in EVNTSEL1.
+ * - Each EVNTSEL contains a CPL field.
+ * - Overflow interrupts are possible, but requires that the
+ * local APIC is available. Some Mobile P6s have no local APIC.
+ * - The PMCs cannot be initialised with arbitrary values, since
+ * wrmsr fills the high bits by sign-extending from bit 31.
+ * - Most events are symmetric, but a few are not.
+ */
+
+/* shared with K7 */
+static int p6_like_check_control(struct perfctr_cpu_state *state, int is_k7)
+{
+ unsigned int evntsel, i, nractrs, nrctrs, pmc_mask, pmc;
+
+ nractrs = state->control.nractrs;
+ nrctrs = nractrs + state->control.nrictrs;
+ if (nrctrs < nractrs || nrctrs > (is_k7 ? 4 : 2))
+ return -EINVAL;
+
+ pmc_mask = 0;
+ for(i = 0; i < nrctrs; ++i) {
+ pmc = state->control.pmc_map[i];
+ state->pmc[i].map = pmc;
+ if (pmc >= (is_k7 ? 4 : 2) || (pmc_mask & (1<<pmc)))
+ return -EINVAL;
+ pmc_mask |= (1<<pmc);
+ evntsel = state->control.evntsel[i];
+ /* protect reserved bits */
+ if (evntsel & P6_EVNTSEL_RESERVED)
+ return -EPERM;
+ /* check ENable bit */
+ if (is_k7) {
+ /* ENable bit must be set in each evntsel */
+ if (!(evntsel & P6_EVNTSEL_ENABLE))
+ return -EINVAL;
+ } else {
+ /* only evntsel[0] has the ENable bit */
+ if (evntsel & P6_EVNTSEL_ENABLE) {
+ if (pmc > 0)
+ return -EPERM;
+ } else {
+ if (pmc == 0)
+ return -EINVAL;
+ }
+ }
+ /* the CPL field must be non-zero */
+ if (!(evntsel & P6_EVNTSEL_CPL))
+ return -EINVAL;
+ /* INT bit must be off for a-mode and on for i-mode counters */
+ if (evntsel & P6_EVNTSEL_INT) {
+ if (i < nractrs)
+ return -EINVAL;
+ } else {
+ if (i >= nractrs)
+ return -EINVAL;
+ }
+ }
+ state->k1.id = new_id();
+ return 0;
+}
+
+static int p6_check_control(struct perfctr_cpu_state *state, int is_global)
+{
+ return p6_like_check_control(state, 0);
+}
+
+#if PERFCTR_INTERRUPT_SUPPORT
+/* PRE: perfctr_cstatus_has_ictrs(state->cstatus) != 0 */
+/* shared with K7 and P4 */
+static void p6_like_isuspend(struct perfctr_cpu_state *state,
+ unsigned int msr_evntsel0)
+{
+ struct per_cpu_cache *cache;
+ unsigned int cstatus, nrctrs, i;
+ int cpu;
+
+ cpu = smp_processor_id();
+ set_isuspend_cpu(state, cpu); /* early to limit cpu's live range */
+ cache = &per_cpu(per_cpu_cache, cpu);
+ cstatus = state->cstatus;
+ nrctrs = perfctr_cstatus_nrctrs(cstatus);
+ for(i = perfctr_cstatus_nractrs(cstatus); i < nrctrs; ++i) {
+ unsigned int pmc_raw, pmc_idx, now;
+ pmc_raw = state->pmc[i].map;
+ /* Note: P4_MASK_FAST_RDPMC is a no-op for P6 and K7.
+ We don't need to make it into a parameter. */
+ pmc_idx = pmc_raw & P4_MASK_FAST_RDPMC;
+ cache->control.evntsel[pmc_idx] = 0;
+ /* On P4 this intensionally also clears the CCCR.OVF flag. */
+ wrmsr(msr_evntsel0+pmc_idx, 0, 0);
+ /* P4 erratum N17 does not apply since we read only low 32 bits. */
+ rdpmc_low(pmc_raw, now);
+ state->pmc[i].sum += now - state->pmc[i].start;
+ state->pmc[i].start = now;
+ }
+ /* cache->k1.id is still == state->k1.id */
+}
+
+/* PRE: perfctr_cstatus_has_ictrs(state->cstatus) != 0 */
+/* shared with K7 and P4 */
+static void p6_like_iresume(const struct perfctr_cpu_state *state,
+ unsigned int msr_evntsel0,
+ unsigned int msr_perfctr0)
+{
+ struct per_cpu_cache *cache;
+ unsigned int cstatus, nrctrs, i;
+ int cpu;
+
+ cpu = smp_processor_id();
+ cache = &per_cpu(per_cpu_cache, cpu);
+ if (cache->k1.id == state->k1.id) {
+ cache->k1.id = 0; /* force reload of cleared EVNTSELs */
+ if (is_isuspend_cpu(state, cpu))
+ return; /* skip reload of PERFCTRs */
+ }
+ cstatus = state->cstatus;
+ nrctrs = perfctr_cstatus_nrctrs(cstatus);
+ for(i = perfctr_cstatus_nractrs(cstatus); i < nrctrs; ++i) {
+ /* Note: P4_MASK_FAST_RDPMC is a no-op for P6 and K7.
+ We don't need to make it into a parameter. */
+ unsigned int pmc = state->pmc[i].map & P4_MASK_FAST_RDPMC;
+ /* If the control wasn't ours we must disable the evntsels
+ before reinitialising the counters, to prevent unexpected
+ counter increments and missed overflow interrupts. */
+ if (cache->control.evntsel[pmc]) {
+ cache->control.evntsel[pmc] = 0;
+ wrmsr(msr_evntsel0+pmc, 0, 0);
+ }
+ /* P4 erratum N15 does not apply since the CCCR is disabled. */
+ wrmsr(msr_perfctr0+pmc, state->pmc[i].start, -1);
+ }
+ /* cache->k1.id remains != state->k1.id */
+}
+
+static void p6_isuspend(struct perfctr_cpu_state *state)
+{
+ p6_like_isuspend(state, MSR_P6_EVNTSEL0);
+}
+
+static void p6_iresume(const struct perfctr_cpu_state *state)
+{
+ p6_like_iresume(state, MSR_P6_EVNTSEL0, MSR_P6_PERFCTR0);
+}
+#endif /* PERFCTR_INTERRUPT_SUPPORT */
+
+/* shared with K7 and VC3 */
+static void p6_like_write_control(const struct perfctr_cpu_state *state,
+ unsigned int msr_evntsel0)
+{
+ struct per_cpu_cache *cache;
+ unsigned int nrctrs, i;
+
+ cache = &__get_cpu_var(per_cpu_cache);
+ if (cache->k1.id == state->k1.id)
+ return;
+ nrctrs = perfctr_cstatus_nrctrs(state->cstatus);
+ for(i = 0; i < nrctrs; ++i) {
+ unsigned int evntsel = state->control.evntsel[i];
+ unsigned int pmc = state->pmc[i].map;
+ if (evntsel != cache->control.evntsel[pmc]) {
+ cache->control.evntsel[pmc] = evntsel;
+ wrmsr(msr_evntsel0+pmc, evntsel, 0);
+ }
+ }
+ cache->k1.id = state->k1.id;
+}
+
+/* shared with VC3, Generic*/
+static void p6_write_control(const struct perfctr_cpu_state *state)
+{
+ p6_like_write_control(state, MSR_P6_EVNTSEL0);
+}
+
+static void p6_clear_counters(void)
+{
+ clear_msr_range(MSR_P6_EVNTSEL0, 2);
+ clear_msr_range(MSR_P6_PERFCTR0, 2);
+}
+
+/*
+ * AMD K7 family (Athlon, Duron).
+ * - Somewhat similar to the Intel P6 family.
+ * - Four 48-bit PMCs.
+ * - Four 32-bit EVNTSEL MSRs with similar layout as in P6.
+ * - Completely different MSR assignments :-(
+ * - Fewer countable events defined :-(
+ * - The events appear to be completely symmetric.
+ * - The EVNTSEL MSRs are symmetric since each has its own enable bit.
+ * - Publicly available documentation is incomplete.
+ * - K7 model 1 does not have a local APIC. AMD Document #22007
+ * Revision J hints that it may use debug interrupts instead.
+ *
+ * The K8 has the same hardware layout as the K7. It also has
+ * better documentation and a different set of available events.
+ */
+
+static int k7_check_control(struct perfctr_cpu_state *state, int is_global)
+{
+ return p6_like_check_control(state, 1);
+}
+
+#if PERFCTR_INTERRUPT_SUPPORT
+static void k7_isuspend(struct perfctr_cpu_state *state)
+{
+ p6_like_isuspend(state, MSR_K7_EVNTSEL0);
+}
+
+static void k7_iresume(const struct perfctr_cpu_state *state)
+{
+ p6_like_iresume(state, MSR_K7_EVNTSEL0, MSR_K7_PERFCTR0);
+}
+#endif /* PERFCTR_INTERRUPT_SUPPORT */
+
+static void k7_write_control(const struct perfctr_cpu_state *state)
+{
+ p6_like_write_control(state, MSR_K7_EVNTSEL0);
+}
+
+static void k7_clear_counters(void)
+{
+ clear_msr_range(MSR_K7_EVNTSEL0, 4+4);
+}
+
+/*
+ * VIA C3 family.
+ * - A Centaur design somewhat similar to the P6/Celeron.
+ * - PERFCTR0 is an alias for the TSC, and EVNTSEL0 is read-only.
+ * - PERFCTR1 is 32 bits wide.
+ * - EVNTSEL1 has no defined control fields, and there is no
+ * defined method for stopping the counter.
+ * - According to testing, the reserved fields in EVNTSEL1 have
+ * no function. We always fill them with zeroes.
+ * - Only a few event codes are defined.
+ * - No local APIC or interrupt-mode support.
+ * - pmc_map[0] must be 1, if nractrs == 1.
+ */
+static int vc3_check_control(struct perfctr_cpu_state *state, int is_global)
+{
+ if (state->control.nrictrs || state->control.nractrs > 1)
+ return -EINVAL;
+ if (state->control.nractrs == 1) {
+ if (state->control.pmc_map[0] != 1)
+ return -EINVAL;
+ state->pmc[0].map = 1;
+ if (state->control.evntsel[0] & VC3_EVNTSEL1_RESERVED)
+ return -EPERM;
+ state->k1.id = state->control.evntsel[0];
+ } else
+ state->k1.id = 0;
+ return 0;
+}
+
+static void vc3_clear_counters(void)
+{
+ /* Not documented, but seems to be default after boot. */
+ wrmsr(MSR_P6_EVNTSEL0+1, 0x00070079, 0);
+}
+
+/*
+ * Intel Pentium 4.
+ * Current implementation restrictions:
+ * - No DS/PEBS support.
+ *
+ * Known quirks:
+ * - OVF_PMI+FORCE_OVF counters must have an ireset value of -1.
+ * This allows the regular overflow check to also handle FORCE_OVF
+ * counters. Not having this restriction would lead to MAJOR
+ * complications in the driver's "detect overflow counters" code.
+ * There is no loss of functionality since the ireset value doesn't
+ * affect the counter's PMI rate for FORCE_OVF counters.
+ * - In experiments with FORCE_OVF counters, and regular OVF_PMI
+ * counters with small ireset values between -8 and -1, it appears
+ * that the faulting instruction is subjected to a new PMI before
+ * it can complete, ad infinitum. This occurs even though the driver
+ * clears the CCCR (and in testing also the ESCR) and invokes a
+ * user-space signal handler before restoring the CCCR and resuming
+ * the instruction.
+ */
+
+/*
+ * Table 15-4 in the IA32 Volume 3 manual contains a 18x8 entry mapping
+ * from counter/CCCR number (0-17) and ESCR SELECT value (0-7) to the
+ * actual ESCR MSR number. This mapping contains some repeated patterns,
+ * so we can compact it to a 4x8 table of MSR offsets:
+ *
+ * 1. CCCRs 16 and 17 are mapped just like CCCRs 13 and 14, respectively.
+ * Thus, we only consider the 16 CCCRs 0-15.
+ * 2. The CCCRs are organised in pairs, and both CCCRs in a pair use the
+ * same mapping. Thus, we only consider the 8 pairs 0-7.
+ * 3. In each pair of pairs, the second odd-numbered pair has the same domain
+ * as the first even-numbered pair, and the range is 1+ the range of the
+ * the first even-numbered pair. For example, CCCR(0) and (1) map ESCR
+ * SELECT(7) to 0x3A0, and CCCR(2) and (3) map it to 0x3A1.
+ * The only exception is that pair (7) [CCCRs 14 and 15] does not have
+ * ESCR SELECT(3) in its domain, like pair (6) [CCCRs 12 and 13] has.
+ * NOTE: Revisions of IA32 Volume 3 older than #245472-007 had an error
+ * in this table: CCCRs 12, 13, and 16 had their mappings for ESCR SELECT
+ * values 2 and 3 swapped.
+ * 4. All MSR numbers are on the form 0x3??. Instead of storing these as
+ * 16-bit numbers, the table only stores the 8-bit offsets from 0x300.
+ */
+
+static const unsigned char p4_cccr_escr_map[4][8] = {
+ /* 0x00 and 0x01 as is, 0x02 and 0x03 are +1 */
+ [0x00/4] { [7] 0xA0,
+ [6] 0xA2,
+ [2] 0xAA,
+ [4] 0xAC,
+ [0] 0xB2,
+ [1] 0xB4,
+ [3] 0xB6,
+ [5] 0xC8, },
+ /* 0x04 and 0x05 as is, 0x06 and 0x07 are +1 */
+ [0x04/4] { [0] 0xC0,
+ [2] 0xC2,
+ [1] 0xC4, },
+ /* 0x08 and 0x09 as is, 0x0A and 0x0B are +1 */
+ [0x08/4] { [1] 0xA4,
+ [0] 0xA6,
+ [5] 0xA8,
+ [2] 0xAE,
+ [3] 0xB0, },
+ /* 0x0C, 0x0D, and 0x10 as is,
+ 0x0E, 0x0F, and 0x11 are +1 except [3] is not in the domain */
+ [0x0C/4] { [4] 0xB8,
+ [5] 0xCC,
+ [6] 0xE0,
+ [0] 0xBA,
+ [2] 0xBC,
+ [3] 0xBE,
+ [1] 0xCA, },
+};
+
+static unsigned int p4_escr_addr(unsigned int pmc, unsigned int cccr_val)
+{
+ unsigned int escr_select, pair, escr_offset;
+
+ escr_select = P4_CCCR_ESCR_SELECT(cccr_val);
+ if (pmc > 0x11)
+ return 0; /* pmc range error */
+ if (pmc > 0x0F)
+ pmc -= 3; /* 0 <= pmc <= 0x0F */
+ pair = pmc / 2; /* 0 <= pair <= 7 */
+ escr_offset = p4_cccr_escr_map[pair / 2][escr_select];
+ if (!escr_offset || (pair == 7 && escr_select == 3))
+ return 0; /* ESCR SELECT range error */
+ return escr_offset + (pair & 1) + 0x300;
+};
+
+static int p4_IQ_ESCR_ok; /* only models <= 2 can use IQ_ESCR{0,1} */
+static int p4_is_ht; /* affects several CCCR & ESCR fields */
+static int p4_extended_cascade_ok; /* only models >= 2 can use extended cascading */
+
+static int p4_check_control(struct perfctr_cpu_state *state, int is_global)
+{
+ unsigned int i, nractrs, nrctrs, pmc_mask;
+
+ nractrs = state->control.nractrs;
+ nrctrs = nractrs + state->control.nrictrs;
+ if (nrctrs < nractrs || nrctrs > 18)
+ return -EINVAL;
+
+ pmc_mask = 0;
+ for(i = 0; i < nrctrs; ++i) {
+ unsigned int pmc, cccr_val, escr_val, escr_addr;
+ /* check that pmc_map[] is well-defined;
+ pmc_map[i] is what we pass to RDPMC, the PMC itself
+ is extracted by masking off the FAST_RDPMC flag */
+ pmc = state->control.pmc_map[i] & ~P4_FAST_RDPMC;
+ state->pmc[i].map = state->control.pmc_map[i];
+ if (pmc >= 18 || (pmc_mask & (1<<pmc)))
+ return -EINVAL;
+ pmc_mask |= (1<<pmc);
+ /* check CCCR contents */
+ cccr_val = state->control.evntsel[i];
+ if (cccr_val & P4_CCCR_RESERVED)
+ return -EPERM;
+ if (cccr_val & P4_CCCR_EXTENDED_CASCADE) {
+ if (!p4_extended_cascade_ok)
+ return -EPERM;
+ if (!(pmc == 12 || pmc >= 15))
+ return -EPERM;
+ }
+ if ((cccr_val & P4_CCCR_ACTIVE_THREAD) != P4_CCCR_ACTIVE_THREAD && !p4_is_ht)
+ return -EINVAL;
+ if (!(cccr_val & (P4_CCCR_ENABLE | P4_CCCR_CASCADE | P4_CCCR_EXTENDED_CASCADE)))
+ return -EINVAL;
+ if (cccr_val & P4_CCCR_OVF_PMI_T0) {
+ if (i < nractrs)
+ return -EINVAL;
+ if ((cccr_val & P4_CCCR_FORCE_OVF) &&
+ state->control.ireset[i] != -1)
+ return -EINVAL;
+ } else {
+ if (i >= nractrs)
+ return -EINVAL;
+ }
+ /* check ESCR contents */
+ escr_val = state->control.p4.escr[i];
+ if (escr_val & P4_ESCR_RESERVED)
+ return -EPERM;
+ if ((escr_val & P4_ESCR_CPL_T1) && (!p4_is_ht || !is_global))
+ return -EINVAL;
+ /* compute and cache ESCR address */
+ escr_addr = p4_escr_addr(pmc, cccr_val);
+ if (!escr_addr)
+ return -EINVAL; /* ESCR SELECT range error */
+ /* IQ_ESCR0 and IQ_ESCR1 only exist in models <= 2 */
+ if ((escr_addr & ~0x001) == 0x3BA && !p4_IQ_ESCR_ok)
+ return -EINVAL;
+ /* XXX: Two counters could map to the same ESCR. Should we
+ check that they use the same ESCR value? */
+ state->p4_escr_map[i] = escr_addr - MSR_P4_ESCR0;
+ }
+ /* check ReplayTagging control (PEBS_ENABLE and PEBS_MATRIX_VERT) */
+ if (state->control.p4.pebs_enable) {
+ if (!nrctrs)
+ return -EPERM;
+ if (state->control.p4.pebs_enable & P4_PE_RESERVED)
+ return -EPERM;
+ if (!(state->control.p4.pebs_enable & P4_PE_UOP_TAG))
+ return -EINVAL;
+ if (!(state->control.p4.pebs_enable & P4_PE_REPLAY_TAG_BITS))
+ return -EINVAL;
+ if (state->control.p4.pebs_matrix_vert & P4_PMV_RESERVED)
+ return -EPERM;
+ if (!(state->control.p4.pebs_matrix_vert & P4_PMV_REPLAY_TAG_BITS))
+ return -EINVAL;
+ } else if (state->control.p4.pebs_matrix_vert)
+ return -EPERM;
+ state->k1.id = new_id();
+ return 0;
+}
+
+#if PERFCTR_INTERRUPT_SUPPORT
+static void p4_isuspend(struct perfctr_cpu_state *state)
+{
+ return p6_like_isuspend(state, MSR_P4_CCCR0);
+}
+
+static void p4_iresume(const struct perfctr_cpu_state *state)
+{
+ return p6_like_iresume(state, MSR_P4_CCCR0, MSR_P4_PERFCTR0);
+}
+#endif /* PERFCTR_INTERRUPT_SUPPORT */
+
+static void p4_write_control(const struct perfctr_cpu_state *state)
+{
+ struct per_cpu_cache *cache;
+ unsigned int nrctrs, i;
+
+ cache = &__get_cpu_var(per_cpu_cache);
+ if (cache->k1.id == state->k1.id)
+ return;
+ nrctrs = perfctr_cstatus_nrctrs(state->cstatus);
+ for(i = 0; i < nrctrs; ++i) {
+ unsigned int escr_val, escr_off, cccr_val, pmc;
+ escr_val = state->control.p4.escr[i];
+ escr_off = state->p4_escr_map[i];
+ if (escr_val != cache->control.escr[escr_off]) {
+ cache->control.escr[escr_off] = escr_val;
+ wrmsr(MSR_P4_ESCR0+escr_off, escr_val, 0);
+ }
+ cccr_val = state->control.evntsel[i];
+ pmc = state->pmc[i].map & P4_MASK_FAST_RDPMC;
+ if (cccr_val != cache->control.evntsel[pmc]) {
+ cache->control.evntsel[pmc] = cccr_val;
+ wrmsr(MSR_P4_CCCR0+pmc, cccr_val, 0);
+ }
+ }
+ if (state->control.p4.pebs_enable != cache->control.pebs_enable) {
+ cache->control.pebs_enable = state->control.p4.pebs_enable;
+ wrmsr(MSR_P4_PEBS_ENABLE, state->control.p4.pebs_enable, 0);
+ }
+ if (state->control.p4.pebs_matrix_vert != cache->control.pebs_matrix_vert) {
+ cache->control.pebs_matrix_vert = state->control.p4.pebs_matrix_vert;
+ wrmsr(MSR_P4_PEBS_MATRIX_VERT, state->control.p4.pebs_matrix_vert, 0);
+ }
+ cache->k1.id = state->k1.id;
+}
+
+static void p4_clear_counters(void)
+{
+ /* MSR 0x3F0 seems to have a default value of 0xFC00, but current
+ docs doesn't fully define it, so leave it alone for now. */
+ /* clear PEBS_ENABLE and PEBS_MATRIX_VERT; they handle both PEBS
+ and ReplayTagging, and should exist even if PEBS is disabled */
+ clear_msr_range(0x3F1, 2);
+ clear_msr_range(0x3A0, 31);
+ clear_msr_range(0x3C0, 6);
+ clear_msr_range(0x3C8, 6);
+ clear_msr_range(0x3E0, 2);
+ clear_msr_range(MSR_P4_CCCR0, 18);
+ clear_msr_range(MSR_P4_PERFCTR0, 18);
+}
+
+/*
+ * Generic driver for any x86 with a working TSC.
+ */
+
+static int generic_check_control(struct perfctr_cpu_state *state, int is_global)
+{
+ if (state->control.nractrs || state->control.nrictrs)
+ return -EINVAL;
+ return 0;
+}
+
+static void generic_clear_counters(void)
+{
+}
+
+/*
+ * Driver methods, internal and exported.
+ *
+ * Frequently called functions (write_control, read_counters,
+ * isuspend and iresume) are back-patched to invoke the correct
+ * processor-specific methods directly, thereby saving the
+ * overheads of indirect function calls.
+ *
+ * Backpatchable call sites must have been "finalised" after
+ * initialisation. The reason for this is that unsynchronised code
+ * modification doesn't work in multiprocessor systems, due to
+ * Intel P6 errata. Consequently, all backpatchable call sites
+ * must be known and local to this file.
+ *
+ * Backpatchable calls must initially be to 'noinline' stubs.
+ * Otherwise the compiler may inline the stubs, which breaks
+ * redirect_call() and finalise_backpatching().
+ */
+
+static int redirect_call_disable;
+
+static noinline void redirect_call(void *ra, void *to)
+{
+ /* XXX: make this function __init later */
+ if (redirect_call_disable)
+ printk(KERN_ERR __FILE__ ":%s: unresolved call to %p at %p\n",
+ __FUNCTION__, to, ra);
+ /* we can only redirect `call near relative' instructions */
+ if (*((unsigned char*)ra - 5) != 0xE8) {
+ printk(KERN_WARNING __FILE__ ":%s: unable to redirect caller %p to %p\n",
+ __FUNCTION__, ra, to);
+ return;
+ }
+ *(int*)((char*)ra - 4) = (char*)to - (char*)ra;
+}
+
+static void (*write_control)(const struct perfctr_cpu_state*);
+static noinline void perfctr_cpu_write_control(const struct perfctr_cpu_state *state)
+{
+ redirect_call(__builtin_return_address(0), write_control);
+ return write_control(state);
+}
+
+static void (*read_counters)(const struct perfctr_cpu_state*,
+ struct perfctr_low_ctrs*);
+static noinline void perfctr_cpu_read_counters(const struct perfctr_cpu_state *state,
+ struct perfctr_low_ctrs *ctrs)
+{
+ redirect_call(__builtin_return_address(0), read_counters);
+ return read_counters(state, ctrs);
+}
+
+#if PERFCTR_INTERRUPT_SUPPORT
+static void (*cpu_isuspend)(struct perfctr_cpu_state*);
+static noinline void perfctr_cpu_isuspend(struct perfctr_cpu_state *state)
+{
+ redirect_call(__builtin_return_address(0), cpu_isuspend);
+ return cpu_isuspend(state);
+}
+
+static void (*cpu_iresume)(const struct perfctr_cpu_state*);
+static noinline void perfctr_cpu_iresume(const struct perfctr_cpu_state *state)
+{
+ redirect_call(__builtin_return_address(0), cpu_iresume);
+ return cpu_iresume(state);
+}
+
+/* Call perfctr_cpu_ireload() just before perfctr_cpu_resume() to
+ bypass internal caching and force a reload if the I-mode PMCs. */
+void perfctr_cpu_ireload(struct perfctr_cpu_state *state)
+{
+#ifdef CONFIG_SMP
+ clear_isuspend_cpu(state);
+#else
+ __get_cpu_var(per_cpu_cache).k1.id = 0;
+#endif
+}
+
+/* PRE: the counters have been suspended and sampled by perfctr_cpu_suspend() */
+static int lvtpc_reinit_needed;
+unsigned int perfctr_cpu_identify_overflow(struct perfctr_cpu_state *state)
+{
+ unsigned int cstatus, nrctrs, pmc, pmc_mask;
+
+ cstatus = state->cstatus;
+ pmc = perfctr_cstatus_nractrs(cstatus);
+ nrctrs = perfctr_cstatus_nrctrs(cstatus);
+
+ for(pmc_mask = 0; pmc < nrctrs; ++pmc) {
+ if ((int)state->pmc[pmc].start >= 0) { /* XXX: ">" ? */
+ /* XXX: "+=" to correct for overshots */
+ state->pmc[pmc].start = state->control.ireset[pmc];
+ pmc_mask |= (1 << pmc);
+ /* On a P4 we should now clear the OVF flag in the
+ counter's CCCR. However, p4_isuspend() already
+ did that as a side-effect of clearing the CCCR
+ in order to stop the i-mode counters. */
+ }
+ }
+ if (lvtpc_reinit_needed)
+ apic_write(APIC_LVTPC, LOCAL_PERFCTR_VECTOR);
+ return pmc_mask;
+}
+
+static inline int check_ireset(const struct perfctr_cpu_state *state)
+{
+ unsigned int nrctrs, i;
+
+ i = state->control.nractrs;
+ nrctrs = i + state->control.nrictrs;
+ for(; i < nrctrs; ++i)
+ if (state->control.ireset[i] >= 0)
+ return -EINVAL;
+ return 0;
+}
+
+static inline void setup_imode_start_values(struct perfctr_cpu_state *state)
+{
+ unsigned int cstatus, nrctrs, i;
+
+ cstatus = state->cstatus;
+ nrctrs = perfctr_cstatus_nrctrs(cstatus);
+ for(i = perfctr_cstatus_nractrs(cstatus); i < nrctrs; ++i)
+ state->pmc[i].start = state->control.ireset[i];
+}
+
+#else /* PERFCTR_INTERRUPT_SUPPORT */
+static inline void perfctr_cpu_isuspend(struct perfctr_cpu_state *state) { }
+static inline void perfctr_cpu_iresume(const struct perfctr_cpu_state *state) { }
+static inline int check_ireset(const struct perfctr_cpu_state *state) { return 0; }
+static inline void setup_imode_start_values(struct perfctr_cpu_state *state) { }
+#endif /* PERFCTR_INTERRUPT_SUPPORT */
+
+static int (*check_control)(struct perfctr_cpu_state*, int);
+int perfctr_cpu_update_control(struct perfctr_cpu_state *state, int is_global)
+{
+ int err;
+
+ clear_isuspend_cpu(state);
+ state->cstatus = 0;
+
+ /* disallow i-mode counters if we cannot catch the interrupts */
+ if (!(perfctr_info.cpu_features & PERFCTR_FEATURE_PCINT)
+ && state->control.nrictrs)
+ return -EPERM;
+
+ err = check_control(state, is_global);
+ if (err < 0)
+ return err;
+ err = check_ireset(state);
+ if (err < 0)
+ return err;
+ state->cstatus = perfctr_mk_cstatus(state->control.tsc_on,
+ state->control.nractrs,
+ state->control.nrictrs);
+ setup_imode_start_values(state);
+ return 0;
+}
+
+void perfctr_cpu_suspend(struct perfctr_cpu_state *state)
+{
+ unsigned int i, cstatus, nractrs;
+ struct perfctr_low_ctrs now;
+
+ if (perfctr_cstatus_has_ictrs(state->cstatus))
+ perfctr_cpu_isuspend(state);
+ perfctr_cpu_read_counters(state, &now);
+ cstatus = state->cstatus;
+ if (perfctr_cstatus_has_tsc(cstatus))
+ state->tsc_sum += now.tsc - state->tsc_start;
+ nractrs = perfctr_cstatus_nractrs(cstatus);
+ for(i = 0; i < nractrs; ++i)
+ state->pmc[i].sum += now.pmc[i] - state->pmc[i].start;
+ /* perfctr_cpu_disable_rdpmc(); */ /* not for x86 */
+}
+
+void perfctr_cpu_resume(struct perfctr_cpu_state *state)
+{
+ if (perfctr_cstatus_has_ictrs(state->cstatus))
+ perfctr_cpu_iresume(state);
+ /* perfctr_cpu_enable_rdpmc(); */ /* not for x86 or global-mode */
+ perfctr_cpu_write_control(state);
+ //perfctr_cpu_read_counters(state, &state->start);
+ {
+ struct perfctr_low_ctrs now;
+ unsigned int i, cstatus, nrctrs;
+ perfctr_cpu_read_counters(state, &now);
+ cstatus = state->cstatus;
+ if (perfctr_cstatus_has_tsc(cstatus))
+ state->tsc_start = now.tsc;
+ nrctrs = perfctr_cstatus_nractrs(cstatus);
+ for(i = 0; i < nrctrs; ++i)
+ state->pmc[i].start = now.pmc[i];
+ }
+ /* XXX: if (SMP && start.tsc == now.tsc) ++now.tsc; */
+}
+
+void perfctr_cpu_sample(struct perfctr_cpu_state *state)
+{
+ unsigned int i, cstatus, nractrs;
+ struct perfctr_low_ctrs now;
+
+ perfctr_cpu_read_counters(state, &now);
+ cstatus = state->cstatus;
+ if (perfctr_cstatus_has_tsc(cstatus)) {
+ state->tsc_sum += now.tsc - state->tsc_start;
+ state->tsc_start = now.tsc;
+ }
+ nractrs = perfctr_cstatus_nractrs(cstatus);
+ for(i = 0; i < nractrs; ++i) {
+ state->pmc[i].sum += now.pmc[i] - state->pmc[i].start;
+ state->pmc[i].start = now.pmc[i];
+ }
+}
+
+static void (*clear_counters)(void);
+static void perfctr_cpu_clear_counters(void)
+{
+ return clear_counters();
+}
+
+/****************************************************************
+ * *
+ * Processor detection and initialisation procedures. *
+ * *
+ ****************************************************************/
+
+static inline void clear_perfctr_cpus_forbidden_mask(void)
+{
+#if !defined(perfctr_cpus_forbidden_mask)
+ cpus_clear(perfctr_cpus_forbidden_mask);
+#endif
+}
+
+static inline void set_perfctr_cpus_forbidden_mask(cpumask_t mask)
+{
+#if !defined(perfctr_cpus_forbidden_mask)
+ perfctr_cpus_forbidden_mask = mask;
+#endif
+}
+
+/* see comment above at redirect_call() */
+static void __init finalise_backpatching(void)
+{
+ struct per_cpu_cache *cache;
+ struct perfctr_cpu_state state;
+ cpumask_t old_mask;
+
+ old_mask = perfctr_cpus_forbidden_mask;
+ clear_perfctr_cpus_forbidden_mask();
+
+ cache = &__get_cpu_var(per_cpu_cache);
+ memset(cache, 0, sizeof *cache);
+ memset(&state, 0, sizeof state);
+ state.cstatus =
+ (perfctr_info.cpu_features & PERFCTR_FEATURE_PCINT)
+ ? perfctr_mk_cstatus(0, 0, 1)
+ : 0;
+ perfctr_cpu_sample(&state);
+ perfctr_cpu_resume(&state);
+ perfctr_cpu_suspend(&state);
+
+ set_perfctr_cpus_forbidden_mask(old_mask);
+
+ redirect_call_disable = 1;
+}
+
+#ifdef CONFIG_SMP
+
+cpumask_t perfctr_cpus_forbidden_mask;
+
+static void __init p4_ht_mask_setup_cpu(void *forbidden)
+{
+ unsigned int local_apic_physical_id = cpuid_ebx(1) >> 24;
+ unsigned int logical_processor_id = local_apic_physical_id & 1;
+ if (logical_processor_id != 0)
+ /* We rely on cpu_set() being atomic! */
+ cpu_set(smp_processor_id(), *(cpumask_t*)forbidden);
+}
+
+static int __init p4_ht_smp_init(void)
+{
+ cpumask_t forbidden;
+ unsigned int cpu;
+
+ cpus_clear(forbidden);
+ smp_call_function(p4_ht_mask_setup_cpu, &forbidden, 1, 1);
+ p4_ht_mask_setup_cpu(&forbidden);
+ if (cpus_empty(forbidden))
+ return 0;
+ perfctr_cpus_forbidden_mask = forbidden;
+ printk(KERN_INFO "perfctr/x86.c: hyper-threaded P4s detected:"
+ " restricting access for CPUs");
+ for(cpu = 0; cpu < NR_CPUS; ++cpu)
+ if (cpu_isset(cpu, forbidden))
+ printk(" %u", cpu);
+ printk("\n");
+ return 0;
+}
+#else /* SMP */
+#define p4_ht_smp_init() (0)
+#endif /* SMP */
+
+static int __init p4_ht_init(void)
+{
+ unsigned int nr_siblings;
+
+ if (!cpu_has_ht)
+ return 0;
+ nr_siblings = (cpuid_ebx(1) >> 16) & 0xFF;
+ if (nr_siblings > 2) {
+ printk(KERN_WARNING "perfctr/x86.c: hyper-threaded P4s detected:"
+ " unsupported number of siblings: %u -- bailing out\n",
+ nr_siblings);
+ return -ENODEV;
+ }
+ if (nr_siblings < 2)
+ return 0;
+ p4_is_ht = 1; /* needed even in a UP kernel */
+ return p4_ht_smp_init();
+}
+
+static int __init intel_init(void)
+{
+ static char p5_name[] __initdata = "Intel P5";
+ static char p6_name[] __initdata = "Intel P6";
+ static char p4_name[] __initdata = "Intel P4";
+ unsigned int misc_enable;
+
+ if (!cpu_has_tsc)
+ return -ENODEV;
+ switch (current_cpu_data.x86) {
+ case 5:
+ if (cpu_has_mmx) {
+ read_counters = rdpmc_read_counters;
+
+ /* Avoid Pentium Erratum 74. */
+ if (current_cpu_data.x86_model == 4 &&
+ (current_cpu_data.x86_mask == 4 ||
+ (current_cpu_data.x86_mask == 3 &&
+ ((cpuid_eax(1) >> 12) & 0x3) == 1)))
+ perfctr_info.cpu_features &= ~PERFCTR_FEATURE_RDPMC;
+ } else {
+ perfctr_info.cpu_features &= ~PERFCTR_FEATURE_RDPMC;
+ read_counters = p5_read_counters;
+ }
+ perfctr_set_tests_type(PTT_P5);
+ perfctr_cpu_name = p5_name;
+ write_control = p5_write_control;
+ check_control = p5_check_control;
+ clear_counters = p5_clear_counters;
+ return 0;
+ case 6:
+ if (current_cpu_data.x86_model == 9) { /* Pentium M */
+ /* Pentium M added the MISC_ENABLE MSR from P4. */
+ rdmsr_low(MSR_IA32_MISC_ENABLE, misc_enable);
+ if (!(misc_enable & MSR_IA32_MISC_ENABLE_PERF_AVAIL))
+ break;
+ /* Erratum Y3 probably does not apply since we
+ read only the low 32 bits. */
+ } else if (current_cpu_data.x86_model < 3) { /* Pentium Pro */
+ /* Avoid Pentium Pro Erratum 26. */
+ if (current_cpu_data.x86_mask < 9)
+ perfctr_info.cpu_features &= ~PERFCTR_FEATURE_RDPMC;
+ }
+ perfctr_set_tests_type(PTT_P6);
+ perfctr_cpu_name = p6_name;
+ read_counters = rdpmc_read_counters;
+ write_control = p6_write_control;
+ check_control = p6_check_control;
+ clear_counters = p6_clear_counters;
+#if PERFCTR_INTERRUPT_SUPPORT
+ if (cpu_has_apic) {
+ perfctr_info.cpu_features |= PERFCTR_FEATURE_PCINT;
+ cpu_isuspend = p6_isuspend;
+ cpu_iresume = p6_iresume;
+ /* P-M apparently inherited P4's LVTPC auto-masking :-( */
+ if (current_cpu_data.x86_model == 9)
+ lvtpc_reinit_needed = 1;
+ }
+#endif
+ return 0;
+ case 15: /* Pentium 4 */
+ rdmsr_low(MSR_IA32_MISC_ENABLE, misc_enable);
+ if (!(misc_enable & MSR_IA32_MISC_ENABLE_PERF_AVAIL))
+ break;
+ if (p4_ht_init() != 0)
+ break;
+ if (current_cpu_data.x86_model <= 2)
+ p4_IQ_ESCR_ok = 1;
+ if (current_cpu_data.x86_model >= 2)
+ p4_extended_cascade_ok = 1;
+ perfctr_set_tests_type(PTT_P4);
+ perfctr_cpu_name = p4_name;
+ read_counters = rdpmc_read_counters;
+ write_control = p4_write_control;
+ check_control = p4_check_control;
+ clear_counters = p4_clear_counters;
+#if PERFCTR_INTERRUPT_SUPPORT
+ if (cpu_has_apic) {
+ perfctr_info.cpu_features |= PERFCTR_FEATURE_PCINT;
+ cpu_isuspend = p4_isuspend;
+ cpu_iresume = p4_iresume;
+ lvtpc_reinit_needed = 1;
+ }
+#endif
+ return 0;
+ }
+ return -ENODEV;
+}
+
+static int __init amd_init(void)
+{
+ static char amd_name[] __initdata = "AMD K7/K8";
+
+ if (!cpu_has_tsc)
+ return -ENODEV;
+ switch (current_cpu_data.x86) {
+ case 6: /* K7 */
+ case 15: /* K8. Like a K7 with a different event set. */
+ break;
+ default:
+ return -ENODEV;
+ }
+ perfctr_set_tests_type(PTT_AMD);
+ perfctr_cpu_name = amd_name;
+ read_counters = rdpmc_read_counters;
+ write_control = k7_write_control;
+ check_control = k7_check_control;
+ clear_counters = k7_clear_counters;
+#if PERFCTR_INTERRUPT_SUPPORT
+ if (cpu_has_apic) {
+ perfctr_info.cpu_features |= PERFCTR_FEATURE_PCINT;
+ cpu_isuspend = k7_isuspend;
+ cpu_iresume = k7_iresume;
+ }
+#endif
+ return 0;
+}
+
+static int __init cyrix_init(void)
+{
+ static char mii_name[] __initdata = "Cyrix 6x86MX/MII/III";
+ if (!cpu_has_tsc)
+ return -ENODEV;
+ switch (current_cpu_data.x86) {
+ case 6: /* 6x86MX, MII, or III */
+ perfctr_set_tests_type(PTT_P5);
+ perfctr_cpu_name = mii_name;
+ read_counters = rdpmc_read_counters;
+ write_control = p5_write_control;
+ check_control = mii_check_control;
+ clear_counters = p5_clear_counters;
+ return 0;
+ }
+ return -ENODEV;
+}
+
+static int __init centaur_init(void)
+{
+#if !defined(CONFIG_X86_TSC)
+ static char winchip_name[] __initdata = "WinChip C6/2/3";
+#endif
+ static char vc3_name[] __initdata = "VIA C3";
+ switch (current_cpu_data.x86) {
+#if !defined(CONFIG_X86_TSC)
+ case 5:
+ switch (current_cpu_data.x86_model) {
+ case 4: /* WinChip C6 */
+ case 8: /* WinChip 2, 2A, or 2B */
+ case 9: /* WinChip 3, a 2A with larger cache and lower voltage */
+ break;
+ default:
+ return -ENODEV;
+ }
+ perfctr_set_tests_type(PTT_WINCHIP);
+ perfctr_cpu_name = winchip_name;
+ /*
+ * TSC must be inaccessible for perfctrs to work.
+ */
+ if (!(read_cr4() & X86_CR4_TSD) || cpu_has_tsc)
+ return -ENODEV;
+ perfctr_info.cpu_features &= ~PERFCTR_FEATURE_RDTSC;
+ read_counters = rdpmc_read_counters;
+ write_control = c6_write_control;
+ check_control = c6_check_control;
+ clear_counters = p5_clear_counters;
+ return 0;
+#endif
+ case 6: /* VIA C3 */
+ if (!cpu_has_tsc)
+ return -ENODEV;
+ switch (current_cpu_data.x86_model) {
+ case 6: /* Cyrix III */
+ case 7: /* Samuel 2, Ezra (steppings >= 8) */
+ case 8: /* Ezra-T */
+ case 9: /* Antaur/Nehemiah */
+ break;
+ default:
+ return -ENODEV;
+ }
+ perfctr_set_tests_type(PTT_VC3);
+ perfctr_cpu_name = vc3_name;
+ read_counters = rdpmc_read_counters;
+ write_control = p6_write_control;
+ check_control = vc3_check_control;
+ clear_counters = vc3_clear_counters;
+ return 0;
+ }
+ return -ENODEV;
+}
+
+static int __init generic_init(void)
+{
+ static char generic_name[] __initdata = "Generic x86 with TSC";
+ if (!cpu_has_tsc)
+ return -ENODEV;
+ perfctr_info.cpu_features &= ~PERFCTR_FEATURE_RDPMC;
+ perfctr_set_tests_type(PTT_GENERIC);
+ perfctr_cpu_name = generic_name;
+ check_control = generic_check_control;
+ write_control = p6_write_control;
+ read_counters = rdpmc_read_counters;
+ clear_counters = generic_clear_counters;
+ return 0;
+}
+
+static void perfctr_cpu_invalidate_cache(void)
+{
+ /*
+ * per_cpu_cache[] is initialised to contain "impossible"
+ * evntsel values guaranteed to differ from anything accepted
+ * by perfctr_cpu_update_control().
+ * All-bits-one works for all currently supported processors.
+ * The memset also sets the ids to -1, which is intentional.
+ */
+ memset(&__get_cpu_var(per_cpu_cache), ~0,
+ sizeof(struct per_cpu_cache));
+}
+
+static void perfctr_cpu_init_one(void *ignore)
+{
+ /* PREEMPT note: when called via smp_call_function(),
+ this is in IRQ context with preemption disabled. */
+ perfctr_cpu_clear_counters();
+ perfctr_cpu_invalidate_cache();
+ if (cpu_has_apic)
+ apic_write(APIC_LVTPC, LOCAL_PERFCTR_VECTOR);
+ if (perfctr_info.cpu_features & PERFCTR_FEATURE_RDPMC)
+ set_in_cr4_local(X86_CR4_PCE);
+}
+
+static void perfctr_cpu_exit_one(void *ignore)
+{
+ /* PREEMPT note: when called via smp_call_function(),
+ this is in IRQ context with preemption disabled. */
+ perfctr_cpu_clear_counters();
+ perfctr_cpu_invalidate_cache();
+ if (cpu_has_apic)
+ apic_write(APIC_LVTPC, APIC_DM_NMI | APIC_LVT_MASKED);
+ if (perfctr_info.cpu_features & PERFCTR_FEATURE_RDPMC)
+ clear_in_cr4_local(X86_CR4_PCE);
+}
+
+#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_PM)
+
+static void perfctr_pm_suspend(void)
+{
+ /* XXX: clear control registers */
+ printk("perfctr/x86: PM suspend\n");
+}
+
+static void perfctr_pm_resume(void)
+{
+ /* XXX: reload control registers */
+ printk("perfctr/x86: PM resume\n");
+}
+
+#include <linux/sysdev.h>
+
+static int perfctr_device_suspend(struct sys_device *dev, u32 state)
+{
+ perfctr_pm_suspend();
+ return 0;
+}
+
+static int perfctr_device_resume(struct sys_device *dev)
+{
+ perfctr_pm_resume();
+ return 0;
+}
+
+static struct sysdev_class perfctr_sysclass = {
+ set_kset_name("perfctr"),
+ .resume = perfctr_device_resume,
+ .suspend = perfctr_device_suspend,
+};
+
+static struct sys_device device_perfctr = {
+ .id = 0,
+ .cls = &perfctr_sysclass,
+};
+
+static void x86_pm_init(void)
+{
+ if (sysdev_class_register(&perfctr_sysclass) == 0)
+ sysdev_register(&device_perfctr);
+}
+
+static void x86_pm_exit(void)
+{
+ sysdev_unregister(&device_perfctr);
+ sysdev_class_unregister(&perfctr_sysclass);
+}
+
+#else
+
+static inline void x86_pm_init(void) { }
+static inline void x86_pm_exit(void) { }
+
+#endif /* CONFIG_X86_LOCAL_APIC && CONFIG_PM */
+
+#if !defined(CONFIG_X86_LOCAL_APIC)
+static inline int reserve_lapic_nmi(void) { return 0; }
+static inline void release_lapic_nmi(void) { }
+#endif
+
+static void do_init_tests(void)
+{
+#ifdef CONFIG_PERFCTR_INIT_TESTS
+ if (reserve_lapic_nmi() >= 0) {
+ perfctr_x86_init_tests();
+ release_lapic_nmi();
+ }
+#endif
+}
+
+static int init_done;
+
+int __init perfctr_cpu_init(void)
+{
+ int err = -ENODEV;
+
+ preempt_disable();
+
+ /* RDPMC and RDTSC are on by default. They will be disabled
+ by the init procedures if necessary. */
+ perfctr_info.cpu_features = PERFCTR_FEATURE_RDPMC | PERFCTR_FEATURE_RDTSC;
+
+ if (cpu_has_msr) {
+ switch (current_cpu_data.x86_vendor) {
+ case X86_VENDOR_INTEL:
+ err = intel_init();
+ break;
+ case X86_VENDOR_AMD:
+ err = amd_init();
+ break;
+ case X86_VENDOR_CYRIX:
+ err = cyrix_init();
+ break;
+ case X86_VENDOR_CENTAUR:
+ err = centaur_init();
+ }
+ }
+ if (err) {
+ err = generic_init(); /* last resort */
+ if (err)
+ goto out;
+ }
+ do_init_tests();
+ finalise_backpatching();
+
+ perfctr_info.cpu_khz = cpu_khz;
+ perfctr_info.tsc_to_cpu_mult = 1;
+ init_done = 1;
+
+ out:
+ preempt_enable();
+ return err;
+}
+
+void __exit perfctr_cpu_exit(void)
+{
+}
+
+/****************************************************************
+ * *
+ * Hardware reservation. *
+ * *
+ ****************************************************************/
+
+static DECLARE_MUTEX(mutex);
+static const char *current_service = 0;
+
+const char *perfctr_cpu_reserve(const char *service)
+{
+ const char *ret;
+
+ if (!init_done)
+ return "unsupported hardware";
+ down(&mutex);
+ ret = current_service;
+ if (ret)
+ goto out_up;
+ ret = "unknown driver (oprofile?)";
+ if (reserve_lapic_nmi() < 0)
+ goto out_up;
+ current_service = service;
+ if (perfctr_info.cpu_features & PERFCTR_FEATURE_RDPMC)
+ mmu_cr4_features |= X86_CR4_PCE;
+ on_each_cpu(perfctr_cpu_init_one, NULL, 1, 1);
+ perfctr_cpu_set_ihandler(NULL);
+ x86_pm_init();
+ ret = NULL;
+ out_up:
+ up(&mutex);
+ return ret;
+}
+
+void perfctr_cpu_release(const char *service)
+{
+ down(&mutex);
+ if (service != current_service) {
+ printk(KERN_ERR "%s: attempt by %s to release while reserved by %s\n",
+ __FUNCTION__, service, current_service);
+ goto out_up;
+ }
+ /* power down the counters */
+ if (perfctr_info.cpu_features & PERFCTR_FEATURE_RDPMC)
+ mmu_cr4_features &= ~X86_CR4_PCE;
+ on_each_cpu(perfctr_cpu_exit_one, NULL, 1, 1);
+ perfctr_cpu_set_ihandler(NULL);
+ x86_pm_exit();
+ current_service = 0;
+ release_lapic_nmi();
+ out_up:
+ up(&mutex);
+}
diff -ruN linux-2.6.7-rc1-mm1/drivers/perfctr/x86_tests.c \
linux-2.6.7-rc1-mm1.perfctr-2.7.3.i386/drivers/perfctr/x86_tests.c
--- linux-2.6.7-rc1-mm1/drivers/perfctr/x86_tests.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.7-rc1-mm1.perfctr-2.7.3.i386/drivers/perfctr/x86_tests.c 2004-05-31 23:45:13.692821000 \
+0200 @@ -0,0 +1,275 @@
+/* $Id: x86_tests.c,v 1.28 2004/05/23 23:22:44 mikpe Exp $
+ * Performance-monitoring counters driver.
+ * Optional x86/x86_64-specific init-time tests.
+ *
+ * Copyright (C) 1999-2004 Mikael Pettersson
+ */
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/fs.h>
+#include <linux/perfctr.h>
+#include <asm/msr.h>
+#undef MSR_P6_PERFCTR0
+#undef MSR_P4_IQ_CCCR0
+#undef MSR_P4_CRU_ESCR0
+#include <asm/fixmap.h>
+#include <asm/apic.h>
+#include <asm/timex.h> /* cpu_khz */
+#include "x86_tests.h"
+
+#define MSR_P5_CESR 0x11
+#define MSR_P5_CTR0 0x12
+#define P5_CESR_VAL (0x16 | (3<<6))
+#define MSR_P6_PERFCTR0 0xC1
+#define MSR_P6_EVNTSEL0 0x186
+#define P6_EVNTSEL0_VAL (0xC0 | (3<<16) | (1<<22))
+#define MSR_K7_EVNTSEL0 0xC0010000
+#define MSR_K7_PERFCTR0 0xC0010004
+#define K7_EVNTSEL0_VAL (0xC0 | (3<<16) | (1<<22))
+#define VC3_EVNTSEL1_VAL 0xC0
+#define MSR_P4_IQ_COUNTER0 0x30C
+#define MSR_P4_IQ_CCCR0 0x36C
+#define MSR_P4_CRU_ESCR0 0x3B8
+#define P4_CRU_ESCR0_VAL ((2<<25) | (1<<9) | (0x3<<2))
+#define P4_IQ_CCCR0_VAL ((0x3<<16) | (4<<13) | (1<<12))
+
+#define NITER 64
+#define X2(S) S";"S
+#define X8(S) X2(X2(X2(S)))
+
+#ifdef __x86_64__
+#define CR4MOV "movq"
+#else
+#define CR4MOV "movl"
+#endif
+
+static void __init do_rdpmc(unsigned pmc, unsigned unused2)
+{
+ unsigned i;
+ for(i = 0; i < NITER/8; ++i)
+ __asm__ __volatile__(X8("rdpmc") : : "c"(pmc) : "eax", "edx");
+}
+
+static void __init do_rdmsr(unsigned msr, unsigned unused2)
+{
+ unsigned i;
+ for(i = 0; i < NITER/8; ++i)
+ __asm__ __volatile__(X8("rdmsr") : : "c"(msr) : "eax", "edx");
+}
+
+static void __init do_wrmsr(unsigned msr, unsigned data)
+{
+ unsigned i;
+ for(i = 0; i < NITER/8; ++i)
+ __asm__ __volatile__(X8("wrmsr") : : "c"(msr), "a"(data), "d"(0));
+}
+
+static void __init do_rdcr4(unsigned unused1, unsigned unused2)
+{
+ unsigned i;
+ unsigned long dummy;
+ for(i = 0; i < NITER/8; ++i)
+ __asm__ __volatile__(X8(CR4MOV" %%cr4,%0") : "=r"(dummy));
+}
+
+static void __init do_wrcr4(unsigned cr4, unsigned unused2)
+{
+ unsigned i;
+ for(i = 0; i < NITER/8; ++i)
+ __asm__ __volatile__(X8(CR4MOV" %0,%%cr4") : : "r"((long)cr4));
+}
+
+static void __init do_rdtsc(unsigned unused1, unsigned unused2)
+{
+ unsigned i;
+ for(i = 0; i < NITER/8; ++i)
+ __asm__ __volatile__(X8("rdtsc") : : : "eax", "edx");
+}
+
+static void __init do_wrlvtpc(unsigned val, unsigned unused2)
+{
+ unsigned i;
+ for(i = 0; i < NITER/8; ++i) {
+ apic_write(APIC_LVTPC, val);
+ apic_write(APIC_LVTPC, val);
+ apic_write(APIC_LVTPC, val);
+ apic_write(APIC_LVTPC, val);
+ apic_write(APIC_LVTPC, val);
+ apic_write(APIC_LVTPC, val);
+ apic_write(APIC_LVTPC, val);
+ apic_write(APIC_LVTPC, val);
+ }
+}
+
+static void __init do_empty_loop(unsigned unused1, unsigned unused2)
+{
+ unsigned i;
+ for(i = 0; i < NITER/8; ++i)
+ __asm__ __volatile__("" : : "c"(0));
+}
+
+static unsigned __init run(void (*doit)(unsigned, unsigned),
+ unsigned arg1, unsigned arg2)
+{
+ unsigned start, dummy, stop;
+ rdtsc(start, dummy);
+ (*doit)(arg1, arg2); /* should take < 2^32 cycles to complete */
+ rdtsc(stop, dummy);
+ return stop - start;
+}
+
+static void __init init_tests_message(void)
+{
+ printk(KERN_INFO "Please email the following PERFCTR INIT lines "
+ "to mikpe@csd.uu.se\n"
+ KERN_INFO "To remove this message, rebuild the driver "
+ "with CONFIG_PERFCTR_INIT_TESTS=n\n");
+ printk(KERN_INFO "PERFCTR INIT: vendor %u, family %u, model %u, stepping %u, clock %u kHz\n",
+ current_cpu_data.x86_vendor,
+ current_cpu_data.x86,
+ current_cpu_data.x86_model,
+ current_cpu_data.x86_mask,
+ (unsigned int)cpu_khz);
+}
+
+static void __init
+measure_overheads(unsigned msr_evntsel0, unsigned evntsel0, unsigned msr_perfctr0,
+ unsigned msr_cccr, unsigned cccr_val)
+{
+ int i;
+ unsigned int loop, ticks[12];
+ const char *name[12];
+
+ if (msr_evntsel0)
+ wrmsr(msr_evntsel0, 0, 0);
+ if (msr_cccr)
+ wrmsr(msr_cccr, 0, 0);
+
+ name[0] = "rdtsc";
+ ticks[0] = run(do_rdtsc, 0, 0);
+ name[1] = "rdpmc";
+ ticks[1] = (perfctr_info.cpu_features & PERFCTR_FEATURE_RDPMC)
+ ? run(do_rdpmc,1,0) : 0;
+ name[2] = "rdmsr (counter)";
+ ticks[2] = msr_perfctr0 ? run(do_rdmsr, msr_perfctr0, 0) : 0;
+ name[3] = msr_cccr ? "rdmsr (escr)" : "rdmsr (evntsel)";
+ ticks[3] = msr_evntsel0 ? run(do_rdmsr, msr_evntsel0, 0) : 0;
+ name[4] = "wrmsr (counter)";
+ ticks[4] = msr_perfctr0 ? run(do_wrmsr, msr_perfctr0, 0) : 0;
+ name[5] = msr_cccr ? "wrmsr (escr)" : "wrmsr (evntsel)";
+ ticks[5] = msr_evntsel0 ? run(do_wrmsr, msr_evntsel0, evntsel0) : 0;
+ name[6] = "read cr4";
+ ticks[6] = run(do_rdcr4, 0, 0);
+ name[7] = "write cr4";
+ ticks[7] = run(do_wrcr4, read_cr4(), 0);
+ name[8] = "rdpmc (fast)";
+ ticks[8] = msr_cccr ? run(do_rdpmc, 0x80000001, 0) : 0;
+ name[9] = "rdmsr (cccr)";
+ ticks[9] = msr_cccr ? run(do_rdmsr, msr_cccr, 0) : 0;
+ name[10] = "wrmsr (cccr)";
+ ticks[10] = msr_cccr ? run(do_wrmsr, msr_cccr, cccr_val) : 0;
+ name[11] = "write LVTPC";
+ ticks[11] = (perfctr_info.cpu_features & PERFCTR_FEATURE_PCINT)
+ ? run(do_wrlvtpc, APIC_DM_NMI|APIC_LVT_MASKED, 0) : 0;
+
+ loop = run(do_empty_loop, 0, 0);
+
+ if (msr_evntsel0)
+ wrmsr(msr_evntsel0, 0, 0);
+ if (msr_cccr)
+ wrmsr(msr_cccr, 0, 0);
+
+ init_tests_message();
+ printk(KERN_INFO "PERFCTR INIT: NITER == %u\n", NITER);
+ printk(KERN_INFO "PERFCTR INIT: loop overhead is %u cycles\n", loop);
+ for(i = 0; i < ARRAY_SIZE(ticks); ++i) {
+ unsigned int x;
+ if (!ticks[i])
+ continue;
+ x = ((ticks[i] - loop) * 10) / NITER;
+ printk(KERN_INFO "PERFCTR INIT: %s cost is %u.%u cycles (%u total)\n",
+ name[i], x/10, x%10, ticks[i]);
+ }
+}
+
+#ifndef __x86_64__
+static inline void perfctr_p5_init_tests(void)
+{
+ measure_overheads(MSR_P5_CESR, P5_CESR_VAL, MSR_P5_CTR0, 0, 0);
+}
+
+static inline void perfctr_p6_init_tests(void)
+{
+ measure_overheads(MSR_P6_EVNTSEL0, P6_EVNTSEL0_VAL, MSR_P6_PERFCTR0, 0, 0);
+}
+
+#if !defined(CONFIG_X86_TSC)
+static inline void perfctr_c6_init_tests(void)
+{
+ unsigned int cesr, dummy;
+
+ rdmsr(MSR_P5_CESR, cesr, dummy);
+ init_tests_message();
+ printk(KERN_INFO "PERFCTR INIT: boot CESR == %#08x\n", cesr);
+}
+#endif
+
+static inline void perfctr_vc3_init_tests(void)
+{
+ measure_overheads(MSR_P6_EVNTSEL0+1, VC3_EVNTSEL1_VAL, MSR_P6_PERFCTR0+1, 0, 0);
+}
+
+static inline void perfctr_p4_init_tests(void)
+{
+ measure_overheads(MSR_P4_CRU_ESCR0, P4_CRU_ESCR0_VAL, MSR_P4_IQ_COUNTER0,
+ MSR_P4_IQ_CCCR0, P4_IQ_CCCR0_VAL);
+}
+#endif /* !__x86_64__ */
+
+static inline void perfctr_k7_init_tests(void)
+{
+ measure_overheads(MSR_K7_EVNTSEL0, K7_EVNTSEL0_VAL, MSR_K7_PERFCTR0, 0, 0);
+}
+
+static inline void perfctr_generic_init_tests(void)
+{
+ measure_overheads(0, 0, 0, 0, 0);
+}
+
+enum perfctr_x86_tests_type perfctr_x86_tests_type __initdata = PTT_UNKNOWN;
+
+void __init perfctr_x86_init_tests(void)
+{
+ switch (perfctr_x86_tests_type) {
+#ifndef __x86_64__
+ case PTT_P5: /* Intel P5, P5MMX; Cyrix 6x86MX, MII, III */
+ perfctr_p5_init_tests();
+ break;
+ case PTT_P6: /* Intel PPro, PII, PIII, PENTM */
+ perfctr_p6_init_tests();
+ break;
+#if !defined(CONFIG_X86_TSC)
+ case PTT_WINCHIP: /* WinChip C6, 2, 3 */
+ perfctr_c6_init_tests();
+ break;
+#endif
+ case PTT_VC3: /* VIA C3 */
+ perfctr_vc3_init_tests();
+ break;
+ case PTT_P4: /* Intel P4 */
+ perfctr_p4_init_tests();
+ break;
+#endif /* !__x86_64__ */
+ case PTT_AMD: /* AMD K7, K8 */
+ perfctr_k7_init_tests();
+ break;
+ case PTT_GENERIC:
+ perfctr_generic_init_tests();
+ break;
+ default:
+ printk(KERN_INFO "%s: unknown CPU type %u\n",
+ __FUNCTION__, perfctr_x86_tests_type);
+ break;
+ }
+}
diff -ruN linux-2.6.7-rc1-mm1/drivers/perfctr/x86_tests.h \
linux-2.6.7-rc1-mm1.perfctr-2.7.3.i386/drivers/perfctr/x86_tests.h
--- linux-2.6.7-rc1-mm1/drivers/perfctr/x86_tests.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.7-rc1-mm1.perfctr-2.7.3.i386/drivers/perfctr/x86_tests.h 2004-05-31 23:45:13.692821000 \
+0200 @@ -0,0 +1,30 @@
+/* $Id: x86_tests.h,v 1.10 2004/05/22 20:48:57 mikpe Exp $
+ * Performance-monitoring counters driver.
+ * Optional x86/x86_64-specific init-time tests.
+ *
+ * Copyright (C) 1999-2004 Mikael Pettersson
+ */
+
+/* 'enum perfctr_x86_tests_type' classifies CPUs according
+ to relevance for perfctr_x86_init_tests(). */
+enum perfctr_x86_tests_type {
+ PTT_UNKNOWN,
+ PTT_GENERIC,
+ PTT_P5,
+ PTT_P6,
+ PTT_P4,
+ PTT_AMD,
+ PTT_WINCHIP,
+ PTT_VC3,
+};
+
+extern enum perfctr_x86_tests_type perfctr_x86_tests_type;
+
+static inline void perfctr_set_tests_type(enum perfctr_x86_tests_type t)
+{
+#ifdef CONFIG_PERFCTR_INIT_TESTS
+ perfctr_x86_tests_type = t;
+#endif
+}
+
+extern void perfctr_x86_init_tests(void);
diff -ruN linux-2.6.7-rc1-mm1/include/asm-i386/mach-default/irq_vectors.h \
linux-2.6.7-rc1-mm1.perfctr-2.7.3.i386/include/asm-i386/mach-default/irq_vectors.h
--- linux-2.6.7-rc1-mm1/include/asm-i386/mach-default/irq_vectors.h 2004-05-10 11:14:37.000000000 +0200
+++ linux-2.6.7-rc1-mm1.perfctr-2.7.3.i386/include/asm-i386/mach-default/irq_vectors.h 2004-05-31 \
23:45:13.692821000 +0200 @@ -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
diff -ruN linux-2.6.7-rc1-mm1/include/asm-i386/mach-pc9800/irq_vectors.h \
linux-2.6.7-rc1-mm1.perfctr-2.7.3.i386/include/asm-i386/mach-pc9800/irq_vectors.h
--- linux-2.6.7-rc1-mm1/include/asm-i386/mach-pc9800/irq_vectors.h 2004-01-09 13:19:11.000000000 +0100
+++ linux-2.6.7-rc1-mm1.perfctr-2.7.3.i386/include/asm-i386/mach-pc9800/irq_vectors.h 2004-05-31 \
23:45:13.692821000 +0200 @@ -59,14 +59,15 @@
* 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
diff -ruN linux-2.6.7-rc1-mm1/include/asm-i386/mach-visws/irq_vectors.h \
linux-2.6.7-rc1-mm1.perfctr-2.7.3.i386/include/asm-i386/mach-visws/irq_vectors.h
--- linux-2.6.7-rc1-mm1/include/asm-i386/mach-visws/irq_vectors.h 2004-01-09 13:19:11.000000000 +0100
+++ linux-2.6.7-rc1-mm1.perfctr-2.7.3.i386/include/asm-i386/mach-visws/irq_vectors.h 2004-05-31 \
23:45:13.692821000 +0200 @@ -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
diff -ruN linux-2.6.7-rc1-mm1/include/asm-i386/perfctr.h \
linux-2.6.7-rc1-mm1.perfctr-2.7.3.i386/include/asm-i386/perfctr.h
--- linux-2.6.7-rc1-mm1/include/asm-i386/perfctr.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.7-rc1-mm1.perfctr-2.7.3.i386/include/asm-i386/perfctr.h 2004-05-31 23:45:13.692821000 +0200
@@ -0,0 +1,200 @@
+/* $Id: perfctr.h,v 1.52 2004/05/23 22:36:34 mikpe Exp $
+ * x86/x86_64 Performance-Monitoring Counters driver
+ *
+ * Copyright (C) 1999-2004 Mikael Pettersson
+ */
+#ifndef _ASM_I386_PERFCTR_H
+#define _ASM_I386_PERFCTR_H
+
+/* cpu_type values */
+#define PERFCTR_X86_GENERIC 0 /* any x86 with rdtsc */
+#define PERFCTR_X86_INTEL_P5 1 /* no rdpmc */
+#define PERFCTR_X86_INTEL_P5MMX 2
+#define PERFCTR_X86_INTEL_P6 3
+#define PERFCTR_X86_INTEL_PII 4
+#define PERFCTR_X86_INTEL_PIII 5
+#define PERFCTR_X86_CYRIX_MII 6
+#define PERFCTR_X86_WINCHIP_C6 7 /* no rdtsc */
+#define PERFCTR_X86_WINCHIP_2 8 /* no rdtsc */
+#define PERFCTR_X86_AMD_K7 9
+#define PERFCTR_X86_VIA_C3 10 /* no pmc0 */
+#define PERFCTR_X86_INTEL_P4 11 /* model 0 and 1 */
+#define PERFCTR_X86_INTEL_P4M2 12 /* model 2 */
+#define PERFCTR_X86_AMD_K8 13
+#define PERFCTR_X86_INTEL_PENTM 14 /* Pentium M */
+#define PERFCTR_X86_AMD_K8C 15 /* Revision C */
+#define PERFCTR_X86_INTEL_P4M3 16 /* model 3 and above */
+
+struct perfctr_sum_ctrs {
+ unsigned long long tsc;
+ unsigned long long pmc[18];
+};
+
+struct perfctr_cpu_control {
+ unsigned int tsc_on;
+ unsigned int nractrs; /* # of a-mode counters */
+ unsigned int nrictrs; /* # of i-mode counters */
+ unsigned int pmc_map[18];
+ unsigned int evntsel[18]; /* one per counter, even on P5 */
+ struct {
+ unsigned int escr[18];
+ unsigned int pebs_enable; /* for replay tagging */
+ unsigned int pebs_matrix_vert; /* for replay tagging */
+ } p4;
+ int ireset[18]; /* < 0, for i-mode counters */
+ unsigned int _reserved1;
+ unsigned int _reserved2;
+ unsigned int _reserved3;
+ unsigned int _reserved4;
+};
+
+struct perfctr_cpu_state {
+ unsigned int cstatus;
+ struct { /* k1 is opaque in the user ABI */
+ unsigned int id;
+ int isuspend_cpu;
+ } k1;
+ /* The two tsc fields must be inlined. Placing them in a
+ sub-struct causes unwanted internal padding on x86-64. */
+ unsigned int tsc_start;
+ unsigned long long tsc_sum;
+ struct {
+ unsigned int map;
+ unsigned int start;
+ unsigned long long sum;
+ } pmc[18]; /* the size is not part of the user ABI */
+#ifdef __KERNEL__
+ struct perfctr_cpu_control control;
+ unsigned int p4_escr_map[18];
+#endif
+};
+
+/* cstatus is a re-encoding of control.tsc_on/nractrs/nrictrs
+ which should have less overhead in most cases */
+
+static inline
+unsigned int perfctr_mk_cstatus(unsigned int tsc_on, unsigned int nractrs,
+ unsigned int nrictrs)
+{
+ return (tsc_on<<31) | (nrictrs<<16) | ((nractrs+nrictrs)<<8) | nractrs;
+}
+
+static inline unsigned int perfctr_cstatus_enabled(unsigned int cstatus)
+{
+ return cstatus;
+}
+
+static inline int perfctr_cstatus_has_tsc(unsigned int cstatus)
+{
+ return (int)cstatus < 0; /* test and jump on sign */
+}
+
+static inline unsigned int perfctr_cstatus_nractrs(unsigned int cstatus)
+{
+ return cstatus & 0x7F; /* and with imm8 */
+}
+
+static inline unsigned int perfctr_cstatus_nrctrs(unsigned int cstatus)
+{
+ return (cstatus >> 8) & 0x7F;
+}
+
+static inline unsigned int perfctr_cstatus_has_ictrs(unsigned int cstatus)
+{
+ return cstatus & (0x7F << 16);
+}
+
+/*
+ * 'struct siginfo' support for perfctr overflow signals.
+ * In unbuffered mode, si_code is set to SI_PMC_OVF and a bitmask
+ * describing which perfctrs overflowed is put in si_pmc_ovf_mask.
+ * A bitmask is used since more than one perfctr can have overflowed
+ * by the time the interrupt handler runs.
+ *
+ * glibc's <signal.h> doesn't seem to define __SI_FAULT or __SI_CODE(),
+ * and including <asm/siginfo.h> as well may cause redefinition errors,
+ * so the user and kernel values are different #defines here.
+ */
+#ifdef __KERNEL__
+#define SI_PMC_OVF (__SI_FAULT|'P')
+#else
+#define SI_PMC_OVF ('P')
+#endif
+#define si_pmc_ovf_mask _sifields._pad[0] /* XXX: use an unsigned field later */
+
+/* version number for user-visible CPU-specific data */
+#define PERFCTR_CPU_VERSION 0x0500 /* 5.0 */
+
+#ifdef __KERNEL__
+
+#if defined(CONFIG_PERFCTR)
+
+/* Driver init/exit. */
+extern int perfctr_cpu_init(void);
+extern void perfctr_cpu_exit(void);
+
+/* CPU type name. */
+extern char *perfctr_cpu_name;
+
+/* Hardware reservation. */
+extern const char *perfctr_cpu_reserve(const char *service);
+extern void perfctr_cpu_release(const char *service);
+
+/* PRE: state has no running interrupt-mode counters.
+ Check that the new control data is valid.
+ Update the driver's private control data.
+ is_global should be zero for per-process counters and non-zero
+ for global-mode counters. This matters for HT P4s, alas.
+ Returns a negative error code if the control data is invalid. */
+extern int perfctr_cpu_update_control(struct perfctr_cpu_state *state, int is_global);
+
+/* Read a-mode counters. Subtract from start and accumulate into sums.
+ Must be called with preemption disabled. */
+extern void perfctr_cpu_suspend(struct perfctr_cpu_state *state);
+
+/* Write control registers. Read a-mode counters into start.
+ Must be called with preemption disabled. */
+extern void perfctr_cpu_resume(struct perfctr_cpu_state *state);
+
+/* Perform an efficient combined suspend/resume operation.
+ Must be called with preemption disabled. */
+extern void perfctr_cpu_sample(struct perfctr_cpu_state *state);
+
+/* The type of a perfctr overflow interrupt handler.
+ It will be called in IRQ context, with preemption disabled. */
+typedef void (*perfctr_ihandler_t)(unsigned long pc);
+
+#if defined(CONFIG_X86_LOCAL_APIC)
+#define PERFCTR_INTERRUPT_SUPPORT 1
+#endif
+
+#if PERFCTR_INTERRUPT_SUPPORT
+extern void perfctr_cpu_set_ihandler(perfctr_ihandler_t);
+extern void perfctr_cpu_ireload(struct perfctr_cpu_state*);
+extern unsigned int perfctr_cpu_identify_overflow(struct perfctr_cpu_state*);
+#else
+static inline void perfctr_cpu_set_ihandler(perfctr_ihandler_t x) { }
+#endif
+
+#if defined(CONFIG_SMP)
+/* CPUs in `perfctr_cpus_forbidden_mask' must not use the
+ performance-monitoring counters. TSC use is unrestricted.
+ This is needed to prevent resource conflicts on hyper-threaded P4s.
+ The declaration of `perfctr_cpus_forbidden_mask' is in the driver's
+ private compat.h, since it needs to handle cpumask_t incompatibilities. */
+#define PERFCTR_CPUS_FORBIDDEN_MASK_NEEDED 1
+#endif
+
+#endif /* CONFIG_PERFCTR */
+
+#if defined(CONFIG_PERFCTR) && PERFCTR_INTERRUPT_SUPPORT
+asmlinkage void perfctr_interrupt(struct pt_regs*);
+#define perfctr_vector_init() \
+ set_intr_gate(LOCAL_PERFCTR_VECTOR, perfctr_interrupt)
+#else
+#define perfctr_vector_init() do{}while(0)
+#endif
+
+#endif /* __KERNEL__ */
+
+#endif /* _ASM_I386_PERFCTR_H */
diff -ruN linux-2.6.7-rc1-mm1/include/asm-i386/processor.h \
linux-2.6.7-rc1-mm1.perfctr-2.7.3.i386/include/asm-i386/processor.h
--- linux-2.6.7-rc1-mm1/include/asm-i386/processor.h 2004-05-30 15:59:30.000000000 +0200
+++ linux-2.6.7-rc1-mm1.perfctr-2.7.3.i386/include/asm-i386/processor.h 2004-05-31 23:45:13.692821000 \
+0200 @@ -422,6 +422,8 @@
unsigned int saved_fs, saved_gs;
/* IO permissions */
unsigned long *io_bitmap_ptr;
+/* performance counters */
+ struct vperfctr *perfctr;
};
#define INIT_THREAD { \
diff -ruN linux-2.6.7-rc1-mm1/include/asm-i386/unistd.h \
linux-2.6.7-rc1-mm1.perfctr-2.7.3.i386/include/asm-i386/unistd.h
--- linux-2.6.7-rc1-mm1/include/asm-i386/unistd.h 2004-05-30 15:59:08.000000000 +0200
+++ linux-2.6.7-rc1-mm1.perfctr-2.7.3.i386/include/asm-i386/unistd.h 2004-05-31 23:45:13.692821000 +0200
@@ -289,8 +289,14 @@
#define __NR_mq_notify (__NR_mq_open+4)
#define __NR_mq_getsetattr (__NR_mq_open+5)
#define __NR_sys_kexec_load 283
+#define __NR_perfctr_info 284
+#define __NR_vperfctr_open (__NR_perfctr_info+1)
+#define __NR_vperfctr_control (__NR_perfctr_info+2)
+#define __NR_vperfctr_unlink (__NR_perfctr_info+3)
+#define __NR_vperfctr_iresume (__NR_perfctr_info+4)
+#define __NR_vperfctr_read (__NR_perfctr_info+5)
-#define NR_syscalls 284
+#define NR_syscalls 290
/* user-visible error numbers are in the range -1 - -124: see <asm-i386/errno.h> */
-
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