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authorRobert Richter <robert.richter@amd.com>2010-02-25 19:16:46 +0100
committerRobert Richter <robert.richter@amd.com>2010-02-26 15:19:03 +0100
commit68dc819ce829f7e7977a56524e710473bdb55115 (patch)
tree639908a6534dc9ee4780d62ad9f5f28d52e58b7d /arch/x86
parent8588d1067147e14d1dd521fbadd1d2564f8cc794 (diff)
downloadlinux-2.6.38-lt-ux500-68dc819ce829f7e7977a56524e710473bdb55115.tar.gz
oprofile/x86: fix perfctr nmi reservation for mulitplexing
Multiple virtual counters share one physical counter. The reservation of virtual counters fails due to duplicate allocation of the same counter. The counters are already reserved. Thus, virtual counter reservation may removed at all. This also makes the code easier. Cc: stable@kernel.org Signed-off-by: Robert Richter <robert.richter@amd.com>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/oprofile/nmi_int.c11
-rw-r--r--arch/x86/oprofile/op_model_amd.c19
2 files changed, 6 insertions, 24 deletions
diff --git a/arch/x86/oprofile/nmi_int.c b/arch/x86/oprofile/nmi_int.c
index 3347f696edc..7170d1e2989 100644
--- a/arch/x86/oprofile/nmi_int.c
+++ b/arch/x86/oprofile/nmi_int.c
@@ -179,7 +179,6 @@ static void nmi_cpu_setup_mux(int cpu, struct op_msrs const * const msrs)
if (counter_config[i].enabled) {
multiplex[i].saved = -(u64)counter_config[i].count;
} else {
- multiplex[i].addr = 0;
multiplex[i].saved = 0;
}
}
@@ -189,25 +188,27 @@ static void nmi_cpu_setup_mux(int cpu, struct op_msrs const * const msrs)
static void nmi_cpu_save_mpx_registers(struct op_msrs *msrs)
{
+ struct op_msr *counters = msrs->counters;
struct op_msr *multiplex = msrs->multiplex;
int i;
for (i = 0; i < model->num_counters; ++i) {
int virt = op_x86_phys_to_virt(i);
- if (multiplex[virt].addr)
- rdmsrl(multiplex[virt].addr, multiplex[virt].saved);
+ if (counters[i].addr)
+ rdmsrl(counters[i].addr, multiplex[virt].saved);
}
}
static void nmi_cpu_restore_mpx_registers(struct op_msrs *msrs)
{
+ struct op_msr *counters = msrs->counters;
struct op_msr *multiplex = msrs->multiplex;
int i;
for (i = 0; i < model->num_counters; ++i) {
int virt = op_x86_phys_to_virt(i);
- if (multiplex[virt].addr)
- wrmsrl(multiplex[virt].addr, multiplex[virt].saved);
+ if (counters[i].addr)
+ wrmsrl(counters[i].addr, multiplex[virt].saved);
}
}
diff --git a/arch/x86/oprofile/op_model_amd.c b/arch/x86/oprofile/op_model_amd.c
index ef9d735dea3..2aab018a7a5 100644
--- a/arch/x86/oprofile/op_model_amd.c
+++ b/arch/x86/oprofile/op_model_amd.c
@@ -118,19 +118,6 @@ static u32 get_ibs_caps(void)
#ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX
-static void op_mux_fill_in_addresses(struct op_msrs * const msrs)
-{
- int i;
-
- for (i = 0; i < NUM_VIRT_COUNTERS; i++) {
- int hw_counter = op_x86_virt_to_phys(i);
- if (reserve_perfctr_nmi(MSR_K7_PERFCTR0 + i))
- msrs->multiplex[i].addr = MSR_K7_PERFCTR0 + hw_counter;
- else
- msrs->multiplex[i].addr = 0;
- }
-}
-
static void op_mux_switch_ctrl(struct op_x86_model_spec const *model,
struct op_msrs const * const msrs)
{
@@ -149,10 +136,6 @@ static void op_mux_switch_ctrl(struct op_x86_model_spec const *model,
}
}
-#else
-
-static inline void op_mux_fill_in_addresses(struct op_msrs * const msrs) { }
-
#endif
/* functions for op_amd_spec */
@@ -174,8 +157,6 @@ static void op_amd_fill_in_addresses(struct op_msrs * const msrs)
else
msrs->controls[i].addr = 0;
}
-
- op_mux_fill_in_addresses(msrs);
}
static void op_amd_setup_ctrs(struct op_x86_model_spec const *model,