hw/acpi: Introduce acpi_builtin() helper

acpi_builtin() can be used to check at runtime whether
the ACPI subsystem is built in a qemu-system binary.

Reviewed-by: Ani Sinha <anisinha@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20250307223949.54040-3-philmd@linaro.org>

diff --git a/hw/acpi/acpi-stub.c b/hw/acpi/acpi-stub.c
index e268ce9b1a9c7d9199ba776f084b8f199cd4f5c5..790bf509e5d86bc73550cc3bff80ba3691fb80f0 100644 (file)
--- a/hw/acpi/acpi-stub.c
+++ b/hw/acpi/acpi-stub.c
@@ -25,3 +25,8 @@ void acpi_table_add(const QemuOpts *opts, Error **errp)
 {
     g_assert_not_reached();
 }
+
+bool acpi_builtin(void)
+{
+    return false;
+}

diff --git a/hw/acpi/core.c b/hw/acpi/core.c
index 870391ed7c8a7ffc1c9332baaeb0ade48eef075f..58f8964e130909de86d16071b0b55bba377b61bc 100644 (file)
--- a/hw/acpi/core.c
+++ b/hw/acpi/core.c
@@ -78,6 +78,11 @@ static void acpi_register_config(void)
 
 opts_init(acpi_register_config);
 
+bool acpi_builtin(void)
+{
+    return true;
+}
+
 static int acpi_checksum(const uint8_t *data, int len)
 {
     int sum, i;

diff --git a/include/hw/acpi/acpi.h b/include/hw/acpi/acpi.h
index e0e51e85b418fce46c100d0e5293b0ba07313b8b..d1a4fa2af8480a0e32fd9f3a6f280f02a3799014 100644 (file)
--- a/include/hw/acpi/acpi.h
+++ b/include/hw/acpi/acpi.h
@@ -150,6 +150,9 @@ struct ACPIREGS {
     Notifier wakeup;
 };
 
+/* Return whether ACPI subsystem is built in */
+bool acpi_builtin(void);
+
 /* PM_TMR */
 void acpi_pm_tmr_update(ACPIREGS *ar, bool enable);
 void acpi_pm_tmr_calc_overflow_time(ACPIREGS *ar);