[xen master] x86/entry: Reduce assembly instruction size

[patchbot@xxxxxxx]

commit 02c6ad45154b6dc47f588c98099b9084ee94c894
Author:     Frediano Ziglio <frediano.ziglio@xxxxxxxxx>
AuthorDate: Tue Feb 6 11:57:05 2024 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Tue Feb 6 11:57:05 2024 +0100

    x86/entry: Reduce assembly instruction size
    
    Use 32 bit versions in all cases, not only for registers till 8th.
    This reduces the encoding from (example with r14):
    
         49 c7 c6 ff 7f 00 00    mov    $0x7fff,%r14
    
    to
    
         41 be ff 7f 00 00       mov    $0x7fff,%r14d
    
    Signed-off-by: Frediano Ziglio <frediano.ziglio@xxxxxxxxx>
    Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 xen/arch/x86/include/asm/asm_defns.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/arch/x86/include/asm/asm_defns.h 
b/xen/arch/x86/include/asm/asm_defns.h
index 51bf1cf1e6..a9a6c21c76 100644
--- a/xen/arch/x86/include/asm/asm_defns.h
+++ b/xen/arch/x86/include/asm/asm_defns.h
@@ -136,7 +136,7 @@ register unsigned long current_stack_pointer asm("rsp");
 #define STACK_CPUINFO_FIELD(field) (1 - CPUINFO_sizeof + CPUINFO_##field)
 #define GET_STACK_END(reg)                        \
         .if .Lr##reg >= 8;                        \
-        movq $STACK_SIZE-1, %r##reg;              \
+        movl $STACK_SIZE-1, %r##reg##d;           \
         .else;                                    \
         movl $STACK_SIZE-1, %e##reg;              \
         .endif;                                   \
--
generated by git-patchbot for /home/xen/git/xen.git#master