xen/acpi: ACPI cpu hotplug

This patch implement real Xen ACPI cpu hotplug driver as module.
When loaded, it replaces Xen stub driver.

For booting existed cpus, the driver enumerates them.
For hotadded cpus, which added at runtime and notify OS via
device or container event, the driver is invoked to add them,
parsing cpu information, hypercalling to Xen hypervisor to add
them, and finally setting up new /sys interface for them.

Signed-off-by: Liu Jinsong <jinsong.liu@intel.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/include/xen/interface/platform.h b/include/xen/interface/platform.h
index 2c4fb4bb07df..c57d5f67f702 100644
--- a/include/xen/interface/platform.h
+++ b/include/xen/interface/platform.h
@@ -324,6 +324,13 @@ struct xenpf_cpu_ol {
 };
 DEFINE_GUEST_HANDLE_STRUCT(xenpf_cpu_ol);
 
+#define XENPF_cpu_hotadd        58
+struct xenpf_cpu_hotadd {
+        uint32_t apic_id;
+        uint32_t acpi_id;
+        uint32_t pxm;
+};
+
 #define XENPF_mem_hotadd        59
 struct xenpf_mem_hotadd {
         uint64_t spfn;
@@ -361,6 +368,7 @@ struct xen_platform_op {
                 struct xenpf_set_processor_pminfo set_pminfo;
                 struct xenpf_pcpuinfo          pcpu_info;
                 struct xenpf_cpu_ol            cpu_ol;
+                struct xenpf_cpu_hotadd        cpu_add;
                 struct xenpf_mem_hotadd        mem_add;
                 struct xenpf_core_parking      core_parking;
                 uint8_t                        pad[128];