linux-kernel - [PATCH] kvm: add proper frame pointer logic for vmx

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Date:   Tue, 15 Jan 2019 01:44:59 -0500
From:   Qian Cai <cai@....pw>
To:     pbonzini@...hat.com, rkrcmar@...hat.com
Cc:     sean.j.christopherson@...el.com, tglx@...utronix.de,
        mingo@...hat.com, bp@...en8.de, hpa@...or.com, x86@...nel.org,
        kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Qian Cai <cai@....pw>
Subject: [PATCH] kvm: add proper frame pointer logic for vmx

compilation warning since v5.0-rc1,

arch/x86/kvm/vmx/vmx.o: warning: objtool: vmx_vcpu_run.part.17()+0x3171:
call without frame pointer save/setup

Fixes: 453eafbe65f (KVM: VMX: Move VM-Enter + VM-Exit handling to
non-inline sub-routines)
Signed-off-by: Qian Cai <cai@....pw>
---
 arch/x86/kvm/vmx/vmenter.S | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kvm/vmx/vmenter.S b/arch/x86/kvm/vmx/vmenter.S
index bcef2c7e9bc4..874dd3030dee 100644
--- a/arch/x86/kvm/vmx/vmenter.S
+++ b/arch/x86/kvm/vmx/vmenter.S
@@ -1,6 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 #include <linux/linkage.h>
 #include <asm/asm.h>
+#include <asm/frame.h>
 
 	.text
 
@@ -20,18 +21,22 @@
  */
 ENTRY(vmx_vmenter)
 	/* EFLAGS.ZF is set if VMCS.LAUNCHED == 0 */
+	FRAME_BEGIN
 	je 2f
 
 1:	vmresume
+	FRAME_END
 	ret
 
 2:	vmlaunch
+	FRAME_END
 	ret
 
 3:	cmpb $0, kvm_rebooting
 	jne 4f
 	call kvm_spurious_fault
-4:	ret
+4:	FRAME_END
+	ret
 
 	.pushsection .fixup, "ax"
 5:	jmp 3b
-- 
2.17.2 (Apple Git-113)