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-rw-r--r--hw/acpi/core.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/hw/acpi/core.c b/hw/acpi/core.c
index 0f201d8c6d..fe6215af4a 100644
--- a/hw/acpi/core.c
+++ b/hw/acpi/core.c
@@ -528,6 +528,7 @@ void acpi_pm_tmr_init(ACPIREGS *ar, acpi_update_sci_fn update_sci,
ar->tmr.timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, acpi_pm_tmr_timer, ar);
memory_region_init_io(&ar->tmr.io, memory_region_owner(parent),
&acpi_pm_tmr_ops, ar, "acpi-tmr", 4);
+ memory_region_clear_global_locking(&ar->tmr.io);
memory_region_add_subregion(parent, 8, &ar->tmr.io);
}