[patch 5/8] 2.6.22-rc3 perfmon2 : IBS implementation for AMD64

Robert Richter
2007-06-15T16:59:47Z

This patch implements an initial AMD64 PMU configuration.

Signed-off-by: Robert Richter <robert.richter@amd.com>

Index: linux-2.6.22-rc3/arch/i386/perfmon/perfmon.c
===================================================================
--- linux-2.6.22-rc3.orig/arch/i386/perfmon/perfmon.c
+++ linux-2.6.22-rc3/arch/i386/perfmon/perfmon.c
@@ -325,6 +325,12 @@ static int pfm_stop_save_p6(struct pfm_c
return 0;
}

+static int pfm_stop_save_amd64(struct pfm_context *ctx,
+ struct pfm_event_set *set)
+{
+ return pfm_stop_save_p6(ctx, set);
+}
+
static int pfm_stop_save_core(struct pfm_context *ctx,
struct pfm_event_set *set)
{
@@ -843,6 +849,11 @@ static int __kprobes pfm_has_ovfl_p6(voi
return 0;
}

+static int __kprobes pfm_has_ovfl_amd64(void)
+{
+ return pfm_has_ovfl_p6();
+}
+
/*
* detect is counters have overflowed.
* return:
@@ -998,6 +1009,10 @@ int pfm_arch_pmu_config_init(struct _pfm
pfm_stop_save = pfm_stop_save_core;
pfm_has_ovfl = pfm_has_ovfl_core;
break;
+ case PFM_X86_PMU_AMD64:
+ pfm_stop_save = pfm_stop_save_amd64;
+ pfm_has_ovfl = pfm_has_ovfl_amd64;
+ break;
default:
PFM_INFO("unknown pmu_style=%d", arch_info->pmu_style);
return -EINVAL;
Index: linux-2.6.22-rc3/include/asm-i386/msr-index.h
===================================================================
--- linux-2.6.22-rc3.orig/include/asm-i386/msr-index.h
+++ linux-2.6.22-rc3/include/asm-i386/msr-index.h
@@ -73,7 +73,7 @@
#define MSR_P6_EVNTSEL0 0x00000186
#define MSR_P6_EVNTSEL1 0x00000187

-/* K7/K8 MSRs. Not complete. See the architecture manual for a more
+/* AMD64 MSRs. Not complete. See the architecture manual for a more
complete list. */

/* K8 MSRs */
Index: linux-2.6.22-rc3/arch/x86_64/perfmon/perfmon_k8.c
===================================================================
--- linux-2.6.22-rc3.orig/arch/x86_64/perfmon/perfmon_k8.c
+++ linux-2.6.22-rc3/arch/x86_64/perfmon/perfmon_k8.c
@@ -25,7 +25,7 @@
#include <asm/nmi.h>

MODULE_AUTHOR("Stephane Eranian <eranian@hpl.hp.com>");
-MODULE_DESCRIPTION("Athlon/Opteron 64 (K8) PMU description table");
+MODULE_DESCRIPTION("AMD64 PMU description table");
MODULE_LICENSE("GPL");

static int force_nmi;
@@ -45,7 +45,7 @@ static struct pfm_arch_pmu_info pfm_k8_p
/* pmd2 */ {{MSR_K7_PERFCTR2, 0}, 0, PFM_REGT_CTR},
/* pmd3 */ {{MSR_K7_PERFCTR3, 0}, 0, PFM_REGT_CTR},
},
- .pmu_style = PFM_X86_PMU_P6
+ .pmu_style = PFM_X86_PMU_AMD64
};

/*
@@ -331,11 +331,13 @@ static int pfm_k8_probe_pmu(void)
if (current_cpu_data.x86_max_cores > 1)
pfm_k8_setup_nb_event_control();

+ PFM_INFO("Using AMD64 PMU");
+
return 0;
}

-static struct pfm_pmu_config pfm_k8_pmu_conf={
- .pmu_name = "AMD K8",
+static struct pfm_pmu_config pfm_k8_pmu_conf = {
+ .pmu_name = "AMD64",
.counter_width = 47,
.pmd_desc = pfm_k8_pmd_desc,
.pmc_desc = pfm_k8_pmc_desc,
Index: linux-2.6.22-rc3/include/asm-i386/perfmon.h
===================================================================
--- linux-2.6.22-rc3.orig/include/asm-i386/perfmon.h
+++ linux-2.6.22-rc3/include/asm-i386/perfmon.h
@@ -98,16 +98,17 @@ struct pfm_arch_pmu_info {
/*
* X86 PMU style
*/
-#define PFM_X86_PMU_P4 1 /* Intel P4/Xeon/EM64T processor PMU */
-#define PFM_X86_PMU_P6 2 /* Intel P6/Pentium M, AMD X86-64 processor PMU */
-#define PFM_X86_PMU_CORE 3 /* Intel Core PMU */
+#define PFM_X86_PMU_P4 1 /* Intel P4/Xeon/EM64T processor PMU */
+#define PFM_X86_PMU_P6 2 /* Intel P6/Pentium M */
+#define PFM_X86_PMU_CORE 3 /* Intel Core PMU */
+#define PFM_X86_PMU_AMD64 4 /* AMD64 PMU (K8, family 10h) */

/*
* PMU feature flags
*/
-#define PFM_X86_FL_PMU_DS 0x1 /* Intel: support for Data Save Area (DS) */
-#define PFM_X86_FL_PMU_PEBS 0x2 /* Intel: support PEBS (implies DS) */
-#define PFM_X86_FL_USE_NMI 0x4 /* must use NMI interrupt */
+#define PFM_X86_FL_PMU_DS 0x01 /* Intel: support for Data Save Area (DS) */
+#define PFM_X86_FL_PMU_PEBS 0x02 /* Intel: support PEBS (implies DS) */
+#define PFM_X86_FL_USE_NMI 0x04 /* must use NMI interrupt */

void __pfm_read_reg_p4(const struct pfm_arch_ext_reg *xreg, u64 *val);
void __pfm_write_reg_p4(const struct pfm_arch_ext_reg *xreg, u64 val);