accel/hvf: Implement AccelClass::get_vcpu_stats() handler

Co-developed-by: Mads Ynddal <mads@ynddal.dk>
Signed-off-by: Mads Ynddal <mads@ynddal.dk>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250715104015.72663-8-philmd@linaro.org>

1 files changed, 25 insertions, 0 deletions

diff --git a/accel/hvf/hvf-accel-ops.c b/accel/hvf/hvf-accel-ops.c
index 214454b..d488d6a 100644
--- a/accel/hvf/hvf-accel-ops.c
+++ b/accel/hvf/hvf-accel-ops.c
@@ -58,6 +58,7 @@
 #include "system/cpus.h"
 #include "system/hvf.h"
 #include "system/hvf_int.h"
+#include <mach/mach_time.h>
 
 HVFState *hvf_state;
 
@@ -118,6 +119,12 @@ static void dummy_signal(int sig)
 {
 }
 
+static void do_hvf_get_vcpu_exec_time(CPUState *cpu, run_on_cpu_data arg)
+{
+    int r = hv_vcpu_get_exec_time(cpu->accel->fd, arg.host_ptr);
+    assert_hvf_ok(r);
+}
+
 static void hvf_vcpu_destroy(CPUState *cpu)
 {
     hv_return_t ret = hv_vcpu_destroy(cpu->accel->fd);
@@ -347,6 +354,21 @@ static void hvf_remove_all_breakpoints(CPUState *cpu)
     }
 }
 
+static void hvf_get_vcpu_stats(CPUState *cpu, GString *buf)
+{
+    uint64_t time_mach; /* units of mach_absolute_time() */
+
+    run_on_cpu(cpu, do_hvf_get_vcpu_exec_time, RUN_ON_CPU_HOST_PTR(&time_mach));
+
+    mach_timebase_info_data_t timebase;
+    mach_timebase_info(&timebase);
+    uint64_t time_ns = time_mach * timebase.numer / timebase.denom;
+
+    g_string_append_printf(buf, "HVF cumulative execution time: %llu.%.3llus\n",
+                                 time_ns / 1000000000,
+                                (time_ns % 1000000000) / 1000000);
+}
+
 static void hvf_accel_ops_class_init(ObjectClass *oc, const void *data)
 {
     AccelOpsClass *ops = ACCEL_OPS_CLASS(oc);
@@ -365,7 +387,10 @@ static void hvf_accel_ops_class_init(ObjectClass *oc, const void *data)
     ops->remove_all_breakpoints = hvf_remove_all_breakpoints;
     ops->update_guest_debug = hvf_update_guest_debug;
     ops->supports_guest_debug = hvf_arch_supports_guest_debug;
+
+    ops->get_vcpu_stats = hvf_get_vcpu_stats;
 };
+
 static const TypeInfo hvf_accel_ops_type = {
     .name = ACCEL_OPS_NAME("hvf"),