This patch (against 2.4.1-ac19) includes the following UP-APIC updates:
* Power Management: If the kernel's UP-APIC code enabled the local APIC
because the BIOS chose not to, it is imperative that the kernel also
disables the local APIC before entering apm/acpi suspend mode. Failure
to do this causes suspend failures and hard system hangs.
The patch fixes apm suspend problems at least on my ASUS P3B-F and
Petr Vandrovec's A7V. (Petr had to use the "standard" UHCI support,
the alternate "JE" one dies after resume.)
* Maciej Rozycki's SMP kernel on UP hardware fix: smpboot needs to call
APIC_unit_uniprocessor() in order to activate the NMI watchdog.
* Code cleanups in nmi.c. Moved P6/K7 setup code to their own functions.
Simplified the P6 code.
* NMI rate reduction for UP-APIC: the 100Hz default rate is excessive for
normal systems, 1Hz suffices. It turns out we cannot start at 1Hz due to
this interacting badly with check_nmi_watchdog() and the watchdog itself,
so the rate is reduced after check_nmi_watchdog() is done.
Some people see much less than 100 NMI/s with the current code in 2.4.1-ac.
I _believe_ it has to do with APM being enabled or not: with APM disabled
the kernel will 'hlt' when idle, which will stop the CPU clock and thus
the perfctr generating NMIs until the next timer irq.
/Mikael
diff -ruN linux-2.4.1-ac19/arch/i386/kernel/apic.c linux-2.4.1-ac19-upapic/arch/i386/kernel/apic.c
--- linux-2.4.1-ac19/arch/i386/kernel/apic.c Tue Feb 20 14:11:36 2001
+++ linux-2.4.1-ac19-upapic/arch/i386/kernel/apic.c Tue Feb 20 14:10:48 2001
@@ -9,6 +9,7 @@
* and Rolf G. Tews
* for testing these extensively.
* Maciej W. Rozycki : Various updates and fixes.
+ * Mikael Pettersson : Power Management for UP-APIC.
*/
#include <linux/config.h>
@@ -379,14 +380,169 @@
setup_apic_nmi_watchdog();
}
+#ifdef CONFIG_PM
+
+#include <linux/slab.h>
+#include <linux/pm.h>
+
+static struct {
+ /* 'active' is true if the local APIC was enabled by us and
+ not the BIOS; this signifies that we are also responsible
+ for disabling it before entering apm/acpi suspend */
+ int active;
+ /* 'perfctr_pmdev' is here because the current (2.4.1) PM
+ callback system doesn't handle hierarchical dependencies */
+ struct pm_dev *perfctr_pmdev;
+ /* r/w apic fields */
+ unsigned int apic_id;
+ unsigned int apic_taskpri;
+ unsigned int apic_ldr;
+ unsigned int apic_dfr;
+ unsigned int apic_spiv;
+ unsigned int apic_lvtt;
+ unsigned int apic_lvtpc;
+ unsigned int apic_lvt0;
+ unsigned int apic_lvt1;
+ unsigned int apic_lvterr;
+ unsigned int apic_tmict;
+ unsigned int apic_tdcr;
+} apic_pm_state;
+
+static void apic_pm_suspend(void *data)
+{
+ unsigned int l, h;
+ unsigned long flags;
+
+ if (apic_pm_state.perfctr_pmdev)
+ pm_send(apic_pm_state.perfctr_pmdev, PM_SUSPEND, data);
+ apic_pm_state.apic_id = apic_read(APIC_ID);
+ apic_pm_state.apic_taskpri = apic_read(APIC_TASKPRI);
+ apic_pm_state.apic_ldr = apic_read(APIC_LDR);
+ apic_pm_state.apic_dfr = apic_read(APIC_DFR);
+ apic_pm_state.apic_spiv = apic_read(APIC_SPIV);
+ apic_pm_state.apic_lvtt = apic_read(APIC_LVTT);
+ apic_pm_state.apic_lvtpc = apic_read(APIC_LVTPC);
+ apic_pm_state.apic_lvt0 = apic_read(APIC_LVT0);
+ apic_pm_state.apic_lvt1 = apic_read(APIC_LVT1);
+ apic_pm_state.apic_lvterr = apic_read(APIC_LVTERR);
+ apic_pm_state.apic_tmict = apic_read(APIC_TMICT);
+ apic_pm_state.apic_tdcr = apic_read(APIC_TDCR);
+ __save_flags(flags);
+ __cli();
+ disable_local_APIC();
+ rdmsr(MSR_IA32_APICBASE, l, h);
+ l &= ~MSR_IA32_APICBASE_ENABLE;
+ wrmsr(MSR_IA32_APICBASE, l, h);
+ __restore_flags(flags);
+}
+
+static void apic_pm_resume(void *data)
+{
+ unsigned int l, h;
+ unsigned long flags;
+
+ __save_flags(flags);
+ __cli();
+ rdmsr(MSR_IA32_APICBASE, l, h);
+ l &= ~MSR_IA32_APICBASE_BASE;
+ l |= MSR_IA32_APICBASE_ENABLE | APIC_DEFAULT_PHYS_BASE;
+ wrmsr(MSR_IA32_APICBASE, l, h);
+ apic_write(APIC_ID, apic_pm_state.apic_id);
+ apic_write(APIC_DFR, apic_pm_state.apic_dfr);
+ apic_write(APIC_LDR, apic_pm_state.apic_ldr);
+ apic_write(APIC_TASKPRI, apic_pm_state.apic_taskpri);
+ apic_write(APIC_SPIV, apic_pm_state.apic_spiv);
+ apic_write(APIC_LVT0, apic_pm_state.apic_lvt0);
+ apic_write(APIC_LVT1, apic_pm_state.apic_lvt1);
+ apic_write(APIC_ESR, 0);
+ apic_read(APIC_ESR);
+ apic_write(APIC_LVTERR, apic_pm_state.apic_lvterr);
+ apic_write(APIC_ESR, 0);
+ apic_read(APIC_ESR);
+ apic_write(APIC_LVTPC, apic_pm_state.apic_lvtpc);
+ apic_write(APIC_LVTT, apic_pm_state.apic_lvtt);
+ apic_write(APIC_TDCR, apic_pm_state.apic_tdcr);
+ apic_write(APIC_TMICT, apic_pm_state.apic_tmict);
+ __restore_flags(flags);
+ if (apic_pm_state.perfctr_pmdev)
+ pm_send(apic_pm_state.perfctr_pmdev, PM_RESUME, data);
+}
+
+static int apic_pm_callback(struct pm_dev *dev, pm_request_t rqst, void *data)
+{
+ switch (rqst) {
+ case PM_SUSPEND:
+ apic_pm_suspend(data);
+ break;
+ case PM_RESUME:
+ apic_pm_resume(data);
+ break;
+ }
+ return 0;
+}
+
+/* perfctr driver should call this instead of pm_register() */
+struct pm_dev *apic_pm_register(pm_dev_t type,
+ unsigned long id,
+ pm_callback callback)
+{
+ struct pm_dev *dev;
+
+ if (!apic_pm_state.active)
+ return pm_register(type, id, callback);
+ if (apic_pm_state.perfctr_pmdev)
+ return NULL; /* we're busy */
+ dev = kmalloc(sizeof(struct pm_dev), GFP_KERNEL);
+ if (dev) {
+ memset(dev, 0, sizeof(*dev));
+ dev->type = type;
+ dev->id = id;
+ dev->callback = callback;
+ apic_pm_state.perfctr_pmdev = dev;
+ }
+ return dev;
+}
+
+/* perfctr driver should call this instead of pm_unregister() */
+void apic_pm_unregister(struct pm_dev *dev)
+{
+ if (!apic_pm_state.active) {
+ pm_unregister(dev);
+ } else if (dev == apic_pm_state.perfctr_pmdev) {
+ apic_pm_state.perfctr_pmdev = NULL;
+ kfree(dev);
+ }
+}
+
+static void __init apic_pm_init1(void)
+{
+ /* can't pm_register() at this early stage in the boot process
+ (causes an immediate reboot), so just set the flag */
+ apic_pm_state.active = 1;
+}
+
+static void __init apic_pm_init2(void)
+{
+ if (apic_pm_state.active)
+ pm_register(PM_SYS_DEV, 0, apic_pm_callback);
+}
+
+#else /* CONFIG_PM */
+
+static inline void apic_pm_init1(void) { }
+static inline void apic_pm_init2(void) { }
+
+#endif /* CONFIG_PM */
+
/*
* Detect and enable local APICs on non-SMP boards.
* Original code written by Keir Fraser.
*/
-int __init detect_init_APIC (void)
+static int __init detect_init_APIC (void)
{
u32 h, l, dummy, features;
+ int needs_pm = 0;
extern void get_cpu_vendor(struct cpuinfo_x86*);
/* Workaround for us being called before identify_cpu(). */
@@ -418,6 +574,7 @@
l &= ~MSR_IA32_APICBASE_BASE;
l |= MSR_IA32_APICBASE_ENABLE | APIC_DEFAULT_PHYS_BASE;
wrmsr(MSR_IA32_APICBASE, l, h);
+ needs_pm = 1;
}
}
/*
@@ -437,6 +594,9 @@
printk("Found and enabled local APIC!\n");
+ if (needs_pm)
+ apic_pm_init1();
+
return 0;
no_apic:
@@ -893,10 +1053,10 @@
* This initializes the IO-APIC and APIC hardware if this is
* a UP kernel.
*/
-void __init APIC_init_uniprocessor (void)
+int __init APIC_init_uniprocessor (void)
{
if (!smp_found_config && !cpu_has_apic)
- return;
+ return -1;
/*
* Complain if the BIOS pretends there is one.
@@ -904,7 +1064,7 @@
if (!cpu_has_apic && APIC_INTEGRATED(apic_version[boot_cpu_id])) {
printk(KERN_ERR "BIOS bug, local APIC #%d not detected!...\n",
boot_cpu_id);
- return;
+ return -1;
}
verify_local_APIC();
@@ -914,6 +1074,8 @@
phys_cpu_present_map = 1;
apic_write_around(APIC_ID, boot_cpu_id);
+ apic_pm_init2();
+
setup_local_APIC();
if (nmi_watchdog == NMI_LOCAL_APIC)
@@ -923,4 +1085,6 @@
setup_IO_APIC();
#endif
setup_APIC_clocks();
+
+ return 0;
}
diff -ruN linux-2.4.1-ac19/arch/i386/kernel/nmi.c linux-2.4.1-ac19-upapic/arch/i386/kernel/nmi.c
--- linux-2.4.1-ac19/arch/i386/kernel/nmi.c Tue Feb 20 14:11:36 2001
+++ linux-2.4.1-ac19-upapic/arch/i386/kernel/nmi.c Tue Feb 20 14:10:48 2001
@@ -4,6 +4,10 @@
* NMI watchdog support on APIC systems
*
* Started by Ingo Molnar <mingo@redhat.com>
+ *
+ * Fixes:
+ * Mikael Pettersson : AMD K7 support for local APIC NMI watchdog.
+ * Mikael Pettersson : Power Management for local APIC NMI watchdog.
*/
#include <linux/mm.h>
@@ -22,6 +26,22 @@
extern void bust_spinlocks(void);
unsigned int nmi_watchdog = NMI_IO_APIC;
+static unsigned int nmi_hz = HZ;
+unsigned int nmi_perfctr_msr; /* the MSR to reset in NMI handler */
+
+#define K7_EVNTSEL_ENABLE (1 << 22)
+#define K7_EVNTSEL_INT (1 << 20)
+#define K7_EVNTSEL_OS (1 << 17)
+#define K7_EVNTSEL_USR (1 << 16)
+#define K7_EVENT_CYCLES_PROCESSOR_IS_RUNNING 0x76
+#define K7_NMI_EVENT K7_EVENT_CYCLES_PROCESSOR_IS_RUNNING
+
+#define P6_EVNTSEL0_ENABLE (1 << 22)
+#define P6_EVNTSEL_INT (1 << 20)
+#define P6_EVNTSEL_OS (1 << 17)
+#define P6_EVNTSEL_USR (1 << 16)
+#define P6_EVENT_CPU_CLOCKS_NOT_HALTED 0x79
+#define P6_NMI_EVENT P6_EVENT_CPU_CLOCKS_NOT_HALTED
int __init check_nmi_watchdog (void)
{
@@ -32,7 +52,7 @@
memcpy(tmp, irq_stat, sizeof(tmp));
sti();
- mdelay((10*1000)/HZ); // wait 10 ticks
+ mdelay((10*1000)/nmi_hz); // wait 10 ticks
for (j = 0; j < smp_num_cpus; j++) {
cpu = cpu_logical_map(j);
@@ -42,6 +62,12 @@
}
}
printk("OK.\n");
+
+ /* now that we know it works we can reduce NMI frequency to
+ something more reasonable; makes a difference in some configs */
+ if (nmi_watchdog == NMI_LOCAL_APIC)
+ nmi_hz = 1;
+
return 0;
}
@@ -56,9 +82,9 @@
if (nmi == NMI_NONE)
nmi_watchdog = nmi;
/*
- * If any non-Intel x86 CPU has a local APIC, then
+ * If any other x86 CPU has a local APIC, then
* please test the NMI stuff there and send me the
- * missing bits. Right now Intel only.
+ * missing bits. Right now Intel P6 and AMD K7 only.
*/
if ((nmi == NMI_LOCAL_APIC) &&
(boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) &&
@@ -79,73 +105,125 @@
__setup("nmi_watchdog=", setup_nmi_watchdog);
+#ifdef CONFIG_PM
+
+#include <linux/pm.h>
+
+struct pm_dev *nmi_pmdev;
+
+static void disable_apic_nmi_watchdog(void)
+{
+ switch (boot_cpu_data.x86_vendor) {
+ case X86_VENDOR_AMD:
+ wrmsr(MSR_K7_EVNTSEL0, 0, 0);
+ break;
+ case X86_VENDOR_INTEL:
+ wrmsr(MSR_IA32_EVNTSEL0, 0, 0);
+ break;
+ }
+}
+
+static int nmi_pm_callback(struct pm_dev *dev, pm_request_t rqst, void *data)
+{
+ switch (rqst) {
+ case PM_SUSPEND:
+ disable_apic_nmi_watchdog();
+ break;
+ case PM_RESUME:
+ setup_apic_nmi_watchdog();
+ break;
+ }
+ return 0;
+}
+
+static void nmi_pm_init(void)
+{
+ if (!nmi_pmdev)
+ nmi_pmdev = apic_pm_register(PM_SYS_DEV, 0, nmi_pm_callback);
+}
+
+#define __pminit /*empty*/
+
+#else /* CONFIG_PM */
+
+static inline void nmi_pm_init(void) { }
+
+#define __pminit __init
+
+#endif /* CONFIG_PM */
+
/*
* Activate the NMI watchdog via the local APIC.
* Original code written by Keith Owens.
- * AMD K7 code by Mikael Pettersson.
*/
-static unsigned int nmi_perfctr_msr; /* the MSR to reset in NMI handler */
-#define MSR_K7_EVNTSEL0 0xC0010000
-#define MSR_K7_PERFCTR0 0xC0010004
-/* Event 0x76 isn't listed in recent revisions of AMD #22007, and it
- slows down (but doesn't halt) when the CPU is idle. Unfortunately
- the K7 doesn't appear to have any other clock-like perfctr event. */
-#define K7_NMI_EVENT 0x76 /* CYCLES_PROCESSOR_IS_RUNNING */
-#define K7_NMI_EVNTSEL ((1<<20)|(3<<16)|K7_NMI_EVENT) /* INT,OS,USR,<event> */
-
-void __init setup_apic_nmi_watchdog (void)
-{
- int value;
-
- if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
- boot_cpu_data.x86 == 6) {
- unsigned i;
- unsigned evntsel;
-
- nmi_perfctr_msr = MSR_K7_PERFCTR0;
-
- for(i = 0; i < 4; ++i) {
- wrmsr(MSR_K7_EVNTSEL0+i, 0, 0);
- wrmsr(MSR_K7_PERFCTR0+i, 0, 0);
- }
+static void __pminit setup_k7_watchdog(void)
+{
+ int i;
+ unsigned int evntsel;
- evntsel = K7_NMI_EVNTSEL;
- wrmsr(MSR_K7_EVNTSEL0, evntsel, 0);
- printk("setting K7_PERFCTR0 to %08lx\n", -(cpu_khz/HZ*1000));
- wrmsr(MSR_K7_PERFCTR0, -(cpu_khz/HZ*1000), -1);
- printk("setting K7 LVTPC to DM_NMI\n");
- apic_write(APIC_LVTPC, APIC_DM_NMI);
- evntsel |= (1<<22); /* ENable */
- printk("setting K7_EVNTSEL0 to %08x\n", evntsel);
- wrmsr(MSR_K7_EVNTSEL0, evntsel, 0);
- return;
+ nmi_perfctr_msr = MSR_K7_PERFCTR0;
+
+ for(i = 0; i < 4; ++i) {
+ wrmsr(MSR_K7_EVNTSEL0+i, 0, 0);
+ wrmsr(MSR_K7_PERFCTR0+i, 0, 0);
}
- nmi_perfctr_msr = MSR_IA32_PERFCTR1;
+ evntsel = K7_EVNTSEL_INT
+ | K7_EVNTSEL_OS
+ | K7_EVNTSEL_USR
+ | K7_NMI_EVENT;
+
+ wrmsr(MSR_K7_EVNTSEL0, evntsel, 0);
+ Dprintk("setting K7_PERFCTR0 to %08lx\n", -(cpu_khz/nmi_hz*1000));
+ wrmsr(MSR_K7_PERFCTR0, -(cpu_khz/nmi_hz*1000), -1);
+ apic_write(APIC_LVTPC, APIC_DM_NMI);
+ evntsel |= K7_EVNTSEL_ENABLE;
+ wrmsr(MSR_K7_EVNTSEL0, evntsel, 0);
+}
+
+static void __pminit setup_p6_watchdog(void)
+{
+ int i;
+ unsigned int evntsel;
- /* clear performance counters 0, 1 */
+ nmi_perfctr_msr = MSR_IA32_PERFCTR0;
- wrmsr(MSR_IA32_EVNTSEL0, 0, 0);
- wrmsr(MSR_IA32_EVNTSEL1, 0, 0);
- wrmsr(MSR_IA32_PERFCTR0, 0, 0);
- wrmsr(MSR_IA32_PERFCTR1, 0, 0);
-
- /* send local-APIC timer counter overflow event as an NMI */
-
- value = 1 << 20 /* Interrupt on overflow */
- | 1 << 17 /* OS mode */
- | 1 << 16 /* User mode */
- | 0x79; /* Event, cpu clocks not halted */
- wrmsr(MSR_IA32_EVNTSEL1, value, 0);
- printk("PERFCTR1: %08lx\n", -(cpu_khz/HZ*1000));
- wrmsr(MSR_IA32_PERFCTR1, -(cpu_khz/HZ*1000), 0);
-
- /* Enable performance counters, only using ctr1 */
-
- apic_write_around(APIC_LVTPC, APIC_DM_NMI);
- value = 1 << 22;
- wrmsr(MSR_IA32_EVNTSEL0, value, 0);
+ for(i = 0; i < 2; ++i) {
+ wrmsr(MSR_IA32_EVNTSEL0+i, 0, 0);
+ wrmsr(MSR_IA32_PERFCTR0+i, 0, 0);
+ }
+
+ evntsel = P6_EVNTSEL_INT
+ | P6_EVNTSEL_OS
+ | P6_EVNTSEL_USR
+ | P6_NMI_EVENT;
+
+ wrmsr(MSR_IA32_EVNTSEL0, evntsel, 0);
+ Dprintk("setting IA32_PERFCTR0 to %08lx\n", -(cpu_khz/nmi_hz*1000));
+ wrmsr(MSR_IA32_PERFCTR0, -(cpu_khz/nmi_hz*1000), 0);
+ apic_write(APIC_LVTPC, APIC_DM_NMI);
+ evntsel |= P6_EVNTSEL0_ENABLE;
+ wrmsr(MSR_IA32_EVNTSEL0, evntsel, 0);
+}
+
+void __pminit setup_apic_nmi_watchdog (void)
+{
+ switch (boot_cpu_data.x86_vendor) {
+ case X86_VENDOR_AMD:
+ if (boot_cpu_data.x86 != 6)
+ return;
+ setup_k7_watchdog();
+ break;
+ case X86_VENDOR_INTEL:
+ if (boot_cpu_data.x86 != 6)
+ return;
+ setup_p6_watchdog();
+ break;
+ default:
+ return;
+ }
+ nmi_pm_init();
}
static spinlock_t nmi_print_lock = SPIN_LOCK_UNLOCKED;
@@ -184,7 +262,7 @@
* wait a few IRQs (5 seconds) before doing the oops ...
*/
alert_counter[cpu]++;
- if (alert_counter[cpu] == 1*HZ) {
+ if (alert_counter[cpu] == 5*nmi_hz) {
spin_lock(&nmi_print_lock);
/*
* We are in trouble anyway, lets at least try
@@ -202,6 +280,6 @@
last_irq_sums[cpu] = sum;
alert_counter[cpu] = 0;
}
- if (cpu_has_apic && (nmi_watchdog == NMI_LOCAL_APIC))
- wrmsr(nmi_perfctr_msr, -(cpu_khz/HZ*1000), -1);
+ if (nmi_perfctr_msr)
+ wrmsr(nmi_perfctr_msr, -(cpu_khz/nmi_hz*1000), -1);
}
diff -ruN linux-2.4.1-ac19/arch/i386/kernel/smpboot.c linux-2.4.1-ac19-upapic/arch/i386/kernel/smpboot.c
--- linux-2.4.1-ac19/arch/i386/kernel/smpboot.c Tue Feb 20 14:11:36 2001
+++ linux-2.4.1-ac19-upapic/arch/i386/kernel/smpboot.c Tue Feb 20 14:10:48 2001
@@ -869,12 +869,15 @@
* get out of here now!
*/
if (!smp_found_config) {
- printk(KERN_NOTICE "SMP motherboard not detected. Using dummy APIC emulation.\n");
+ printk(KERN_NOTICE "SMP motherboard not detected.\n");
#ifndef CONFIG_VISWS
io_apic_irqs = 0;
#endif
cpu_online_map = phys_cpu_present_map = 1;
smp_num_cpus = 1;
+ if (APIC_init_uniprocessor())
+ printk(KERN_NOTICE "Local APIC not detected."
+ " Using dummy APIC emulation.\n");
goto smp_done;
}
@@ -1020,4 +1023,3 @@
smp_done:
zap_low_mappings();
}
-
diff -ruN linux-2.4.1-ac19/include/asm-i386/apic.h linux-2.4.1-ac19-upapic/include/asm-i386/apic.h
--- linux-2.4.1-ac19/include/asm-i386/apic.h Tue Feb 20 14:11:48 2001
+++ linux-2.4.1-ac19-upapic/include/asm-i386/apic.h Tue Feb 20 14:10:48 2001
@@ -2,6 +2,7 @@
#define __ASM_APIC_H
#include <linux/config.h>
+#include <linux/pm.h>
#include <asm/apicdef.h>
#include <asm/system.h>
@@ -69,7 +70,6 @@
extern int verify_local_APIC (void);
extern void cache_APIC_registers (void);
extern void sync_Arb_IDs (void);
-extern int detect_init_APIC (void);
extern void init_bsp_APIC (void);
extern void setup_local_APIC (void);
extern void init_apic_mappings (void);
@@ -77,18 +77,19 @@
extern void setup_APIC_clocks (void);
extern void setup_apic_nmi_watchdog (void);
extern inline void nmi_watchdog_tick (struct pt_regs * regs);
-extern void APIC_init_uniprocessor (void);
+extern int APIC_init_uniprocessor (void);
+
+extern struct pm_dev *apic_pm_register(pm_dev_t, unsigned long, pm_callback);
+extern void apic_pm_unregister(struct pm_dev*);
extern unsigned int apic_timer_irqs [NR_CPUS];
extern int check_nmi_watchdog (void);
extern unsigned int nmi_watchdog;
-enum nmi_watchdog_source_types {
- NMI_NONE = 0,
- NMI_IO_APIC = 1,
- NMI_LOCAL_APIC = 2,
- NMI_INVALID = 3
-};
+#define NMI_NONE 0
+#define NMI_IO_APIC 1
+#define NMI_LOCAL_APIC 2
+#define NMI_INVALID 3
#endif /* CONFIG_X86_LOCAL_APIC */
diff -ruN linux-2.4.1-ac19/include/asm-i386/msr.h linux-2.4.1-ac19-upapic/include/asm-i386/msr.h
--- linux-2.4.1-ac19/include/asm-i386/msr.h Tue Feb 20 14:11:48 2001
+++ linux-2.4.1-ac19-upapic/include/asm-i386/msr.h Tue Feb 20 14:10:48 2001
@@ -67,4 +67,7 @@
#define MSR_IA32_MC0_MISC_OFFSET 0x3
#define MSR_IA32_MC0_BANK_COUNT 0x4
-#endif
+#define MSR_K7_EVNTSEL0 0xC0010000
+#define MSR_K7_PERFCTR0 0xC0010004
+
+#endif /* __ASM_MSR_H */
-
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