[PATCH for-next v2 1/2] xen/arm: Include asm/asm-offsets.h and asm/macros.h on every assembly files

[Julien Grall <julien@xxxxxxx>]

From: Julien Grall <jgrall@xxxxxxxxxx>

In a follow-up patch we may want to automatically replace some
mnemonics (such as ret) with a different sequence.

To ensure all the assembly files will include asm/macros.h it is best to
automatically include it on single assembly. This can be done via
config.h.

It was necessary to include a few more headers as dependency:
  - <asm/asm_defns.h> to define sizeof_*
  - <xen/page-size.h> which is already a latent issue given STACK_ORDER
  rely on PAGE_SIZE.

Unfortunately the build system will use -D__ASSEMBLY__ when generating
the linker script. A new option -D__LINKER__ is introduceed and used for
the linker script to avoid including headers (such as asm/macros.h) that
may not be compatible with the syntax.

Lastly, take the opportunity to remove both asm/asm-offsets.h and
asm/macros.h from the various assembly files as they are now
automagically included.

Signed-off-by: Julien Grall <jgrall@xxxxxxxxxx>
---
 xen/arch/arm/Makefile                | 2 +-
 xen/arch/arm/arm32/entry.S           | 1 -
 xen/arch/arm/arm32/head.S            | 1 -
 xen/arch/arm/arm32/proc-v7.S         | 1 -
 xen/arch/arm/arm64/debug-cadence.inc | 1 -
 xen/arch/arm/arm64/debug-pl011.inc   | 2 --
 xen/arch/arm/arm64/entry.S           | 2 --
 xen/arch/arm/arm64/head.S            | 2 --
 xen/arch/arm/arm64/smc.S             | 3 ---
 xen/include/asm-arm/config.h         | 6 ++++++
 10 files changed, 7 insertions(+), 14 deletions(-)

diff --git a/xen/arch/arm/Makefile b/xen/arch/arm/Makefile
index 16e6523e2cc6..9ffc3f771c51 100644
--- a/xen/arch/arm/Makefile
+++ b/xen/arch/arm/Makefile
@@ -135,7 +135,7 @@ asm-offsets.s: $(TARGET_SUBARCH)/asm-offsets.c
        $(CC) $(filter-out -flto,$(c_flags)) -S -o $@ $<
 
 xen.lds: xen.lds.S
-       $(CPP) -P $(a_flags) -MQ $@ -o $@ $<
+       $(CPP) -P $(a_flags) -D__LINKER__ -MQ $@ -o $@ $<
 
 dtb.o: $(CONFIG_DTB_FILE)
 
diff --git a/xen/arch/arm/arm32/entry.S b/xen/arch/arm/arm32/entry.S
index b228d44b190c..f2f1bc7a3158 100644
--- a/xen/arch/arm/arm32/entry.S
+++ b/xen/arch/arm/arm32/entry.S
@@ -1,4 +1,3 @@
-#include <asm/asm_defns.h>
 #include <asm/sysregs.h>
 #include <asm/regs.h>
 #include <asm/alternative.h>
diff --git a/xen/arch/arm/arm32/head.S b/xen/arch/arm/arm32/head.S
index c404fa973e9b..9084023a6ed9 100644
--- a/xen/arch/arm/arm32/head.S
+++ b/xen/arch/arm/arm32/head.S
@@ -18,7 +18,6 @@
  */
 
 #include <asm/page.h>
-#include <asm/asm_defns.h>
 #include <asm/early_printk.h>
 
 #define ZIMAGE_MAGIC_NUMBER 0x016f2818
diff --git a/xen/arch/arm/arm32/proc-v7.S b/xen/arch/arm/arm32/proc-v7.S
index 46bfc7a9074c..1efde2d72da0 100644
--- a/xen/arch/arm/arm32/proc-v7.S
+++ b/xen/arch/arm/arm32/proc-v7.S
@@ -17,7 +17,6 @@
  * GNU General Public License for more details.
  */
 
-#include <asm/asm_defns.h>
 #include <asm/arm32/processor.h>
 #include <asm/sysregs.h>
 
diff --git a/xen/arch/arm/arm64/debug-cadence.inc 
b/xen/arch/arm/arm64/debug-cadence.inc
index 7df0abe4756f..0b6f2e094e18 100644
--- a/xen/arch/arm/arm64/debug-cadence.inc
+++ b/xen/arch/arm/arm64/debug-cadence.inc
@@ -17,7 +17,6 @@
  * GNU General Public License for more details.
  */
 
-#include <asm/asm_defns.h>
 #include <asm/cadence-uart.h>
 
 /*
diff --git a/xen/arch/arm/arm64/debug-pl011.inc 
b/xen/arch/arm/arm64/debug-pl011.inc
index 385deff49b1b..1928a2e3ffbb 100644
--- a/xen/arch/arm/arm64/debug-pl011.inc
+++ b/xen/arch/arm/arm64/debug-pl011.inc
@@ -16,8 +16,6 @@
  * GNU General Public License for more details.
  */
 
-#include <asm/asm_defns.h>
-
 /*
  * PL011 UART initialization
  * xb: register which containts the UART base address
diff --git a/xen/arch/arm/arm64/entry.S b/xen/arch/arm/arm64/entry.S
index 175ea2981e72..ab9a65fc1475 100644
--- a/xen/arch/arm/arm64/entry.S
+++ b/xen/arch/arm/arm64/entry.S
@@ -1,6 +1,4 @@
-#include <asm/asm_defns.h>
 #include <asm/current.h>
-#include <asm/macros.h>
 #include <asm/regs.h>
 #include <asm/alternative.h>
 #include <asm/smccc.h>
diff --git a/xen/arch/arm/arm64/head.S b/xen/arch/arm/arm64/head.S
index 5d44667bd89d..fa7a3ffd2926 100644
--- a/xen/arch/arm/arm64/head.S
+++ b/xen/arch/arm/arm64/head.S
@@ -21,11 +21,9 @@
  */
 
 #include <asm/page.h>
-#include <asm/asm_defns.h>
 #include <asm/early_printk.h>
 #include <efi/efierr.h>
 #include <asm/arm64/efibind.h>
-#include <asm/arm64/macros.h>
 
 #define PT_PT     0xf7f /* nG=1 AF=1 SH=11 AP=01 NS=1 ATTR=111 T=1 P=1 */
 #define PT_MEM    0xf7d /* nG=1 AF=1 SH=11 AP=01 NS=1 ATTR=111 T=0 P=1 */
diff --git a/xen/arch/arm/arm64/smc.S b/xen/arch/arm/arm64/smc.S
index b0752be57e8f..91bae62dd4d2 100644
--- a/xen/arch/arm/arm64/smc.S
+++ b/xen/arch/arm/arm64/smc.S
@@ -13,9 +13,6 @@
  * GNU General Public License for more details.
  */
 
-#include <asm/asm_defns.h>
-#include <asm/macros.h>
-
 /*
  * void __arm_smccc_1_0_smc(register_t a0, register_t a1, register_t a2,
  *                          register_t a3, register_t a4, register_t a5,
diff --git a/xen/include/asm-arm/config.h b/xen/include/asm-arm/config.h
index 5c10c755db46..51273b9db1fc 100644
--- a/xen/include/asm-arm/config.h
+++ b/xen/include/asm-arm/config.h
@@ -69,6 +69,7 @@
 #endif
 
 #include <xen/const.h>
+#include <xen/page-size.h>
 
 /*
  * Common ARM32 and ARM64 layout:
@@ -190,6 +191,11 @@ extern unsigned long frametable_virt_end;
 #define watchdog_disable() ((void)0)
 #define watchdog_enable()  ((void)0)
 
+#if defined(__ASSEMBLY__) && !defined(__LINKER__)
+#include <asm/asm-offsets.h>
+#include <asm/macros.h>
+#endif
+
 #endif /* __ARM_CONFIG_H__ */
 /*
  * Local variables:
-- 
2.17.1