[PATCH v2 1/5] xen: define ACPI and DT device info sections macros

[Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>]

Introduce conditional macros to define device
information sections based on the configuration of ACPI
or device tree support. These sections are required for
common code of device initialization and getting an information
about a device.

These macros are expected to be used across different
architectures (Arm, PPC, RISC-V), so they are moved to
the common xen/xen.lds.h, based on their original definition
in Arm.

Signed-off-by: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
---
Changes in v2:
 - New patch.
---
 xen/include/xen/xen.lds.h | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/xen/include/xen/xen.lds.h b/xen/include/xen/xen.lds.h
index a17810bb28..aa7301139d 100644
--- a/xen/include/xen/xen.lds.h
+++ b/xen/include/xen/xen.lds.h
@@ -114,6 +114,21 @@
 
 /* List of constructs other than *_SECTIONS in alphabetical order. */
 
+#define USE_DECL_SECTION(x) DECL_SECTION(x)
+
+#define NOUSE_DECL_SECTION(x) x :
+
+#ifdef CONFIG_ACPI
+#define ACPI_DEV_INFO_SEC(secname, DECL_SECTION_MACROS_NAME)  \
+    DECL_SECTION_MACROS_NAME(secname) {                     \
+      _asdevice = .;                                        \
+      *(secname)                                            \
+      _aedevice = .;                                        \
+    } :text
+#else
+#define ACPI_DEV_INFO_SEC(secname, DECL_SECTION_MACROS_NAME)
+#endif /* CONFIG_ACPI */
+
 #define BUGFRAMES                               \
     __start_bug_frames_0 = .;                   \
     *(.bug_frames.0)                            \
@@ -131,6 +146,17 @@
     *(.bug_frames.3)                            \
     __stop_bug_frames_3 = .;
 
+#ifdef CONFIG_HAS_DEVICE_TREE
+#define DT_DEV_INFO_SEC(secname, DECL_SECTION_MACROS_NAME)  \
+    DECL_SECTION_MACROS_NAME(secname) {                     \
+      _sdevice = .;                                         \
+      *(secname)                                            \
+      _edevice = .;                                         \
+    } :text
+#else
+#define DECL_DT_DEV_INFO_SEC(secname, DECL_SECTION_MACROS_NAME)
+#endif /* CONFIG_HAS_DEVICE_TREE */
+
 #ifdef CONFIG_HYPFS
 #define HYPFS_PARAM              \
        . = ALIGN(POINTER_ALIGN); \
-- 
2.46.0