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Message-ID: <20250205110651.26280-4-jgross@suse.com> Date: Wed, 5 Feb 2025 12:06:51 +0100 From: Juergen Gross <jgross@...e.com> To: linux-kernel@...r.kernel.org, x86@...nel.org Cc: Juergen Gross <jgross@...e.com>, Boris Ostrovsky <boris.ostrovsky@...cle.com>, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>, "H. Peter Anvin" <hpa@...or.com>, xen-devel@...ts.xenproject.org Subject: [PATCH v2 3/3] x86/xen: remove unneeded dummy push from xen_hypercall_hvm() 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@...e.com> --- arch/x86/xen/xen-head.S | 6 ------ 1 file changed, 6 deletions(-) diff --git a/arch/x86/xen/xen-head.S b/arch/x86/xen/xen-head.S index 4e481b0eefc9..894edf8d6d62 100644 --- a/arch/x86/xen/xen-head.S +++ b/arch/x86/xen/xen-head.S @@ -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 -- 2.43.0
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