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diff --git a/usr.sbin/bhyve/acpi_device.h b/usr.sbin/bhyve/acpi_device.h
--- a/usr.sbin/bhyve/acpi_device.h
+++ b/usr.sbin/bhyve/acpi_device.h
@@ -28,13 +28,14 @@
* Creates an ACPI device.
*
* @param[out] new_dev Returns the newly create ACPI device.
+ * @param[in] parent Pointer to the parent object which is an ACPI device.
* @param[in] vm_ctx VM context the ACPI device is created in.
* @param[in] emul Device emulation struct. It contains some information
* like the name of the ACPI device and some device specific
* functions.
*/
-int acpi_device_create(struct acpi_device **new_dev, struct vmctx *vm_ctx,
- const struct acpi_device_emul *emul);
+int acpi_device_create(struct acpi_device **new_dev, void *parent,
+ struct vmctx *vm_ctx, const struct acpi_device_emul *emul);
void acpi_device_destroy(struct acpi_device *dev);
int acpi_device_add_res_fixed_ioport(struct acpi_device *dev, UINT16 port,
@@ -42,5 +43,7 @@
int acpi_device_add_res_fixed_memory32(struct acpi_device *dev,
UINT8 write_protected, UINT32 address, UINT32 length);
+void *acpi_device_get_parent(const struct acpi_device *dev);
+
int acpi_device_build_table(const struct acpi_device *dev);
int acpi_device_write_dsdt(const struct acpi_device *dev);
diff --git a/usr.sbin/bhyve/acpi_device.c b/usr.sbin/bhyve/acpi_device.c
--- a/usr.sbin/bhyve/acpi_device.c
+++ b/usr.sbin/bhyve/acpi_device.c
@@ -36,18 +36,20 @@
* Holds information about an ACPI device.
*
* @param vm_ctx VM context the ACPI device was created in.
+ * @param parent A pointer to the parent device emulation.
* @param emul Device emulation struct. It contains some information like the
name of the ACPI device and some device specific functions.
* @param crs Current resources used by the ACPI device.
*/
struct acpi_device {
struct vmctx *vm_ctx;
+ void *parent;
const struct acpi_device_emul *emul;
SLIST_HEAD(acpi_resource_list, acpi_resource_list_entry) crs;
};
int
-acpi_device_create(struct acpi_device **const new_dev,
+acpi_device_create(struct acpi_device **const new_dev, void *const parent,
struct vmctx *const vm_ctx, const struct acpi_device_emul *const emul)
{
assert(new_dev != NULL);
@@ -60,6 +62,7 @@
}
dev->vm_ctx = vm_ctx;
+ dev->parent = parent;
dev->emul = emul;
SLIST_INIT(&dev->crs);
@@ -136,6 +139,14 @@
return (0);
}
+void *
+acpi_device_get_parent(const struct acpi_device *const dev)
+{
+ assert(dev != NULL);
+
+ return (dev->parent);
+}
+
int
acpi_device_build_table(const struct acpi_device *const dev)
{
diff --git a/usr.sbin/bhyve/qemu_fwcfg.c b/usr.sbin/bhyve/qemu_fwcfg.c
--- a/usr.sbin/bhyve/qemu_fwcfg.c
+++ b/usr.sbin/bhyve/qemu_fwcfg.c
@@ -382,7 +382,7 @@
* tables and register io ports for fwcfg, if it's used.
*/
if (strcmp(lpc_fwcfg(), "qemu") == 0) {
- error = acpi_device_create(&fwcfg_sc.acpi_dev, ctx,
+ error = acpi_device_create(&fwcfg_sc.acpi_dev, fwcfg_sc, ctx,
&qemu_fwcfg_acpi_device_emul);
if (error) {
warnx("%s: failed to create ACPI device for QEMU FwCfg",

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