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x86/xen: remove 32-bit awareness from startup_xen

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startup_xen is still 32-bit aware, even if no longer needed.

Replace the register macros by the 64-bit register names for making
it more readable.

Signed-off-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/20211028081221.2475-5-jgross@suse.com
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
This commit is contained in:
Juergen Gross 2021-10-28 10:12:21 +02:00 committed by Boris Ostrovsky
parent 3ac876e8b5
commit eae446b765
1 changed files with 6 additions and 6 deletions
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12
arch/x86/xen/xen-head.S
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@ -45,13 +45,13 @@ SYM_CODE_START(startup_xen)
/* Clear .bss */
xor %eax,%eax
mov $__bss_start, %_ASM_DI
mov $__bss_stop, %_ASM_CX
sub %_ASM_DI, %_ASM_CX
shr $__ASM_SEL(2, 3), %_ASM_CX
rep __ASM_SIZE(stos)
mov $__bss_start, %rdi
mov $__bss_stop, %rcx
sub %rdi, %rcx
shr $3, %rcx
rep stosq
mov %_ASM_SI, xen_start_info
mov %rsi, xen_start_info
mov initial_stack(%rip), %rsp
/* Set up %gs.