The instruction event is only enabled when icount is used, cycles are
always supported.
Note: Setting can_do_io=1 should not be done here. It is ugly and wrong,
but I am not sure of the proper way to handle this (See 'target/arm:
Filter cycle counter based on PMCCFILTR_EL0')
Signed-off-by: Aaron Lindsay <alind...@codeaurora.org>
---
target/arm/helper.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++--
1 file changed, 47 insertions(+), 2 deletions(-)
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 66e576a..5972984 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -14,6 +14,7 @@
#include "arm_ldst.h"
#include <zlib.h> /* For crc32 */
#include "exec/semihost.h"
+#include "sysemu/cpus.h"
#include "sysemu/kvm.h"
#define ARM_CPU_FREQ 1000000000 /* FIXME: 1 GHz, should be configurable */
@@ -901,8 +902,53 @@ typedef struct pm_event {
uint64_t (*get_count)(CPUARMState *);
} pm_event;
+static bool event_always_supported(CPUARMState *env)
+{
+ return true;
+}
+
+static uint64_t cycles_get_count(CPUARMState *env)
+{
+ uint64_t ret;
+ CPUState *cpu = ENV_GET_CPU(env);
+ uint32_t saved_can_do_io = cpu->can_do_io;
+ cpu->can_do_io = 1;
+
+ ret = muldiv64(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL),
+ ARM_CPU_FREQ, NANOSECONDS_PER_SECOND);
+
+ cpu->can_do_io = saved_can_do_io;
+ return ret;
+}
+
+static bool instructions_supported(CPUARMState *env)
+{
+ return use_icount == 1 /* Precise instruction counting */;
+}
+
+static uint64_t instructions_get_count(CPUARMState *env)
+{
+ uint64_t ret;
+ CPUState *cpu = ENV_GET_CPU(env);
+ uint32_t saved_can_do_io = cpu->can_do_io;
+ cpu->can_do_io = 1;
+
+ ret = (uint64_t)cpu_get_icount_raw();
+
+ cpu->can_do_io = saved_can_do_io;
+ return ret;
+}
+
#define SUPPORTED_EVENT_SENTINEL UINT16_MAX
static const pm_event pm_events[] = {
+ { .number = 0x008, /* INST_RETIRED */
+ .supported = instructions_supported,
+ .get_count = instructions_get_count
+ },
+ { .number = 0x011, /* CPU_CYCLES */
+ .supported = event_always_supported,
+ .get_count = cycles_get_count
+ },
{ .number = SUPPORTED_EVENT_SENTINEL }
};
static uint16_t supported_event_map[0x3f];
@@ -1087,8 +1133,7 @@ void pmccntr_sync(CPUARMState *env)
!pmu_counter_filtered(env, env->cp15.pmccfiltr_el0)) {
uint64_t temp_ticks;
- temp_ticks = muldiv64(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL),
- ARM_CPU_FREQ, NANOSECONDS_PER_SECOND);
+ temp_ticks = cycles_get_count(env);
if (env->cp15.c9_pmcr & PMCRD) {
/* Increment once every 64 processor clock cycles */
--
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