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authorLiu Jinsong <jinsong.liu@intel.com>2013-01-24 20:16:59 +0800
committerKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2013-02-19 22:02:25 -0500
commitdcb93b96cec723783a81e8cac7df62feaf964792 (patch)
tree475c9e6d52c87d6063a7a94511a29d25c294921d /include/xen
parent07d0c943663f82d9682856c0a7db7145a6c911d6 (diff)
xen/stub: driver for memory hotplug
This patch create a file (xen-stub.c) for Xen stub drivers. Xen stub drivers are used to reserve space for Xen drivers, i.e. memory hotplug and cpu hotplug, and to block native drivers loaded, so that real Xen drivers can be modular and loaded on demand. This patch is specific for Xen memory hotplug (other Xen logic can add stub drivers on their own). The xen stub driver will occupied earlier via subsys_initcall (than native memory hotplug driver via module_init and so blocking native). Later real Xen memory hotplug logic will unregister the stub driver and register itself to take effect on demand. Signed-off-by: Liu Jinsong <jinsong.liu@intel.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'include/xen')
-rw-r--r--include/xen/acpi.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/xen/acpi.h b/include/xen/acpi.h
index 48a9c0171b6..ce7e5264b32 100644
--- a/include/xen/acpi.h
+++ b/include/xen/acpi.h
@@ -40,6 +40,13 @@
#include <xen/xen.h>
#include <linux/acpi.h>
+#define ACPI_MEMORY_DEVICE_CLASS "memory"
+#define ACPI_MEMORY_DEVICE_HID "PNP0C80"
+#define ACPI_MEMORY_DEVICE_NAME "Hotplug Mem Device"
+
+int xen_stub_memory_device_init(void);
+void xen_stub_memory_device_exit(void);
+
int xen_acpi_notify_hypervisor_state(u8 sleep_state,
u32 pm1a_cnt, u32 pm1b_cnd);