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x86/xen: remove unneeded dummy push from xen_hypercall_hvm()

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Stack alignment of the kernel in 64-bit mode is 8, not 16, so the
dummy push in xen_hypercall_hvm() for aligning the stack to 16 bytes
can be removed.

Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
This commit is contained in:
Juergen Gross 2025-02-05 11:24:47 +01:00
parent 0bd797b801
commit aaf5eefd37
1 changed files with 0 additions and 6 deletions
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6
arch/x86/xen/xen-head.S
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@ -100,9 +100,6 @@ SYM_FUNC_START(xen_hypercall_hvm)
push %r10
push %r9
push %r8
#ifdef CONFIG_FRAME_POINTER
pushq $0 /* Dummy push for stack alignment. */
#endif
#endif
/* Set the vendor specific function. */
call __xen_hypercall_setfunc
@ -119,9 +116,6 @@ SYM_FUNC_START(xen_hypercall_hvm)
#else
lea xen_hypercall_amd(%rip), %rcx
cmp %rax, %rcx
#ifdef CONFIG_FRAME_POINTER
pop %rax /* Dummy pop. */
#endif
pop %r8
pop %r9
pop %r10