Add DSDT node for AppleSMC

AppleSMC (-device isa-applesmc) is required to boot OS X guests.
OS X expects a SMC node to be present in the ACPI DSDT. This patch
adds a SMC node to the DSDT, and dynamically patches the return value
of SMC._STA to either 0x0B if the chip is present, or otherwise to 0x00,
before booting the guest.

Signed-off-by: Gabriel Somlo <somlo@cmu.edu>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/include/hw/isa/isa.h b/include/hw/isa/isa.h
index fa45a5b094..e0c749f9e9 100644
--- a/include/hw/isa/isa.h
+++ b/include/hw/isa/isa.h
@@ -20,6 +20,13 @@
 #define TYPE_ISA_BUS "ISA"
 #define ISA_BUS(obj) OBJECT_CHECK(ISABus, (obj), TYPE_ISA_BUS)
 
+#define TYPE_APPLE_SMC "isa-applesmc"
+
+static inline bool applesmc_find(void)
+{
+    return object_resolve_path_type("", TYPE_APPLE_SMC, NULL);
+}
+
 typedef struct ISADeviceClass {
     DeviceClass parent_class;
 } ISADeviceClass;