[PATCH v2 08/15] xen/asm-generic: introduce generic header percpu.h

[Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>]

Signed-off-by: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
---
Changes in V2:
        - use smp_processor_id() instead of get_processor_id().
        - update commit message .
---
 xen/include/asm-generic/percpu.h | 35 ++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 xen/include/asm-generic/percpu.h

diff --git a/xen/include/asm-generic/percpu.h b/xen/include/asm-generic/percpu.h
new file mode 100644
index 0000000000..85a3f3ef17
--- /dev/null
+++ b/xen/include/asm-generic/percpu.h
@@ -0,0 +1,35 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef __ASM_GENERIC_PERCPU_H__
+#define __ASM_GENERIC_PERCPU_H__
+
+#ifndef __ASSEMBLY__
+
+#include <xen/types.h>
+
+extern char __per_cpu_start[], __per_cpu_data_end[];
+extern unsigned long __per_cpu_offset[NR_CPUS];
+void percpu_init_areas(void);
+
+#define per_cpu(var, cpu)  \
+    (*RELOC_HIDE(&per_cpu__##var, __per_cpu_offset[cpu]))
+
+#define this_cpu(var) \
+    (*RELOC_HIDE(&per_cpu__##var, __per_cpu_offset[smp_processor_id()]))
+
+#define per_cpu_ptr(var, cpu)  \
+    (*RELOC_HIDE(var, __per_cpu_offset[cpu]))
+#define this_cpu_ptr(var) \
+    (*RELOC_HIDE(var, smp_processor_id()))
+
+#endif
+
+#endif /* __ASM_GENERIC_PERCPU_H__ */
+
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "BSD"
+ * c-basic-offset: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
-- 
2.41.0