diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 5b06a98ffd4c..f08c287b6242 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -10771,7 +10771,7 @@ static void __noclone vmx_vcpu_run(struct kvm_vcpu *vcpu)
 	else if (static_branch_unlikely(&mds_user_clear))
 		mds_clear_cpu_buffers();
 
-	asm(
+	asm volatile (
 		/* Store host registers */
 		"push %%" _ASM_DX "; push %%" _ASM_BP ";"
 		"push %%" _ASM_CX " \n\t" /* placeholder for guest rcx */
@@ -10882,7 +10882,8 @@ static void __noclone vmx_vcpu_run(struct kvm_vcpu *vcpu)
 		".global vmx_return \n\t"
 		"vmx_return: " _ASM_PTR " 2b \n\t"
 		".popsection"
-	      : : "c"(vmx), "d"((unsigned long)HOST_RSP), "S"(evmcs_rsp),
+	      : "=c"((int){0}), "=d"((int){0}), "=S"((int){0})
+	      : "c"(vmx), "d"((unsigned long)HOST_RSP), "S"(evmcs_rsp),
 		[launched]"i"(offsetof(struct vcpu_vmx, __launched)),
 		[fail]"i"(offsetof(struct vcpu_vmx, fail)),
 		[host_rsp]"i"(offsetof(struct vcpu_vmx, host_rsp)),