oprofile: Introduce op_x86_phys_to_virt()
This new function translates physical to virtual counter numbers.
Signed-off-by: Robert Richter <robert.richter@amd.com>
diff --git a/arch/x86/oprofile/nmi_int.c b/arch/x86/oprofile/nmi_int.c
index b211d33..02b57b8 100644
--- a/arch/x86/oprofile/nmi_int.c
+++ b/arch/x86/oprofile/nmi_int.c
@@ -27,12 +27,6 @@
#include "op_counter.h"
#include "op_x86_model.h"
-
-#ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX
-DEFINE_PER_CPU(int, switch_index);
-#endif
-
-
static struct op_x86_model_spec const *model;
static DEFINE_PER_CPU(struct op_msrs, cpu_msrs);
static DEFINE_PER_CPU(unsigned long, saved_lvtpc);
@@ -103,6 +97,21 @@
}
}
+#ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX
+
+static DEFINE_PER_CPU(int, switch_index);
+
+inline int op_x86_phys_to_virt(int phys)
+{
+ return __get_cpu_var(switch_index) + phys;
+}
+
+#else
+
+inline int op_x86_phys_to_virt(int phys) { return phys; }
+
+#endif
+
static void free_msrs(void)
{
int i;
@@ -248,31 +257,25 @@
static void nmi_cpu_save_mpx_registers(struct op_msrs *msrs)
{
- unsigned int si = __get_cpu_var(switch_index);
struct op_msr *multiplex = msrs->multiplex;
- unsigned int i;
+ int i;
for (i = 0; i < model->num_counters; ++i) {
- int offset = i + si;
- if (multiplex[offset].addr) {
- rdmsrl(multiplex[offset].addr,
- multiplex[offset].saved);
- }
+ int virt = op_x86_phys_to_virt(i);
+ if (multiplex[virt].addr)
+ rdmsrl(multiplex[virt].addr, multiplex[virt].saved);
}
}
static void nmi_cpu_restore_mpx_registers(struct op_msrs *msrs)
{
- unsigned int si = __get_cpu_var(switch_index);
struct op_msr *multiplex = msrs->multiplex;
- unsigned int i;
+ int i;
for (i = 0; i < model->num_counters; ++i) {
- int offset = i + si;
- if (multiplex[offset].addr) {
- wrmsrl(multiplex[offset].addr,
- multiplex[offset].saved);
- }
+ int virt = op_x86_phys_to_virt(i);
+ if (multiplex[virt].addr)
+ wrmsrl(multiplex[virt].addr, multiplex[virt].saved);
}
}
