[PATCH v14 7/9] xen/riscv: use .insn with operands to support the older gas

[Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>]

Support for specifying "raw" insns was added only in 2.38.
To support older version it would be better switch to .insn
with operands.

The following compilation error occurs:
  ./arch/riscv/include/asm/processor.h: Assembler messages:
  ./arch/riscv/include/asm/processor.h:70: Error: unrecognized opcode 
`0x0100000F'
In case of the following Binutils:
  $ riscv64-linux-gnu-as --version
  GNU assembler (GNU Binutils for Debian) 2.35.2

Suggested-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Signed-off-by: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
Suggested-by: Jan Beulich <jbeulich@xxxxxxxx>
---
Andrew,

Could you please take a look if you are okay with suggested
changes.

Thanks in advance.
---
 Changes in V14:
  - add Suggested-By: Jan Beulich <jbeulich@xxxxxxxx>
  - switch from "raw" insn to .insn with operands to support older gas.
---
 Changes in V13:
  - new patch
---
 xen/arch/riscv/include/asm/processor.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/arch/riscv/include/asm/processor.h 
b/xen/arch/riscv/include/asm/processor.h
index 6846151717..3ae164c265 100644
--- a/xen/arch/riscv/include/asm/processor.h
+++ b/xen/arch/riscv/include/asm/processor.h
@@ -67,7 +67,7 @@ static inline void cpu_relax(void)
     __asm__ __volatile__ ( "pause" );
 #else
     /* Encoding of the pause instruction */
-    __asm__ __volatile__ ( ".insn 0x0100000F" );
+    __asm__ __volatile__ ( ".insn r MISC_MEM, 0, 0, x0, x0, x16" );
 #endif
 
     barrier();
-- 
2.45.2