kernel: add per-cpu data section to kernel image

include/socks/cpu.h

@@ -0,0 +1,13 @@
+#ifndef SOCKS_CPU_H_
+#define SOCKS_CPU_H_
+
+#include <socks/bitmap.h>
+
+/* maximum number of processor cores that the kernel can support.
+   TODO move to build config option */
+#define CPU_MAX 128
+
+DECLARE_BITMAP(cpu_available, CPU_MAX);
+DECLARE_BITMAP(cpu_online, CPU_MAX);
+
+#endif

include/socks/percpu.h

@@ -0,0 +1,15 @@
+#ifndef SOCKS_PERCPU_H_
+#define SOCKS_PERCPU_H_
+
+#include <socks/compiler.h>
+
+#define DEFINE_PERCPU_VAR(type, name) \
+	__section(".data.percpu") type name
+
+#define percpu_get(var) __percpu_get(var)
+
+#define percpu_put(var)
+
+extern void *__percpu_get(void *var);
+
+#endif