perfcounters: add fixed-mode PMC enumeration

Enumerate fixed-mode PMCs based on CPUID, and feed that into the
perfcounter code.

Does not use fixed-mode PMCs yet.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 23 insertions, 0 deletions

diff --git a/arch/x86/include/asm/perf_counter.h b/arch/x86/include/asm/perf_counter.h
index dd5a4a559e2d..945a315e6d62 100644
--- a/arch/x86/include/asm/perf_counter.h
+++ b/arch/x86/include/asm/perf_counter.h
@@ -41,6 +41,29 @@ union cpuid10_eax {
         unsigned int full;
 };
 
+union cpuid10_edx {
+        struct {
+                unsigned int num_counters_fixed:4;
+                unsigned int reserved:28;
+        } split;
+        unsigned int full;
+};
+
+
+/*
+ * Fixed-purpose performance counters:
+ */
+
+/* Instr_Retired.Any: */
+#define MSR_ARCH_PERFMON_FIXED_CTR0                     0x309
+
+/* CPU_CLK_Unhalted.Core: */
+#define MSR_ARCH_PERFMON_FIXED_CTR1                     0x30a
+
+/* CPU_CLK_Unhalted.Ref: */
+#define MSR_ARCH_PERFMON_FIXED_CTR2                     0x30b
+
+
 #ifdef CONFIG_PERF_COUNTERS
 extern void init_hw_perf_counters(void);
 extern void perf_counters_lapic_init(int nmi);