[PATCH v5 2/6] xen: define ACPI and DT device info sections macros

[Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>]

Introduce 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>
Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
---
Changes in V5:
 - drop macros parameter for ACPI_DEV_INFO and DT_DEV_INFO.
 - add Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
---
Changes in V4:
 - rename ADEV_INFO to ACPI_DEV_INFO.
 - refactor ADEV_INFO and DT_DEV_INFO: add alignment and DECL_SECTION.
---
 Changes in V3:
  - drop SEC* at the end of ACPI AND DT device info
    section mancros.
  - refactor ADEV_INFO and DT_DEV_INFO macros.
---
 xen/include/xen/xen.lds.h | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/xen/include/xen/xen.lds.h b/xen/include/xen/xen.lds.h
index c6178bdc42..16a9b1ba03 100644
--- a/xen/include/xen/xen.lds.h
+++ b/xen/include/xen/xen.lds.h
@@ -120,6 +120,14 @@
 
 /* List of constructs other than *_SECTIONS in alphabetical order. */
 
+#define ACPI_DEV_INFO        \
+  . = ALIGN(POINTER_ALIGN);  \
+  DECL_SECTION(.adev.info) { \
+      _asdevice = .;         \
+      *(.adev.info)          \
+      _aedevice = .;         \
+  } :text
+
 #define BUGFRAMES                               \
     __start_bug_frames_0 = .;                   \
     *(.bug_frames.0)                            \
@@ -137,6 +145,14 @@
     *(.bug_frames.3)                            \
     __stop_bug_frames_3 = .;
 
+#define DT_DEV_INFO         \
+  . = ALIGN(POINTER_ALIGN); \
+  DECL_SECTION(.dev.info) { \
+       _sdevice = .;        \
+       *(.dev.info)         \
+       _edevice = .;        \
+  } :text
+
 #ifdef CONFIG_HYPFS
 #define HYPFS_PARAM              \
        . = ALIGN(POINTER_ALIGN); \
-- 
2.46.1