1 files changed, 23 insertions, 28 deletions

diff --git a/arch/x86/include/asm/kvm_para.h b/arch/x86/include/asm/kvm_para.h
index 5ed1f16187b..c7678e43465 100644
--- a/arch/x86/include/asm/kvm_para.h
+++ b/arch/x86/include/asm/kvm_para.h
@@ -27,7 +27,7 @@ static inline bool kvm_check_and_clear_guest_paused(void)
  *
  * Up to four arguments may be passed in rbx, rcx, rdx, and rsi respectively.
  * The hypercall number should be placed in rax and the return value will be
- * placed in rax.  No other registers will be clobbered unless explicited
+ * placed in rax.  No other registers will be clobbered unless explicitly
  * noted by the particular hypercall.
  */
 
@@ -85,43 +85,38 @@ static inline long kvm_hypercall4(unsigned int nr, unsigned long p1,
 	return ret;
 }
 
-static inline int kvm_para_available(void)
-{
-	unsigned int eax, ebx, ecx, edx;
-	char signature[13];
-
-	if (boot_cpu_data.cpuid_level < 0)
-		return 0;	/* So we don't blow up on old processors */
+#ifdef CONFIG_KVM_GUEST
+bool kvm_para_available(void);
+unsigned int kvm_arch_para_features(void);
+void __init kvm_guest_init(void);
+void kvm_async_pf_task_wait(u32 token);
+void kvm_async_pf_task_wake(u32 token);
+u32 kvm_read_and_reset_pf_reason(void);
+extern void kvm_disable_steal_time(void);
 
-	if (cpu_has_hypervisor) {
-		cpuid(KVM_CPUID_SIGNATURE, &eax, &ebx, &ecx, &edx);
-		memcpy(signature + 0, &ebx, 4);
-		memcpy(signature + 4, &ecx, 4);
-		memcpy(signature + 8, &edx, 4);
-		signature[12] = 0;
+#ifdef CONFIG_PARAVIRT_SPINLOCKS
+void __init kvm_spinlock_init(void);
+#else /* !CONFIG_PARAVIRT_SPINLOCKS */
+static inline void kvm_spinlock_init(void)
+{
+}
+#endif /* CONFIG_PARAVIRT_SPINLOCKS */
 
-		if (strcmp(signature, "KVMKVMKVM") == 0)
-			return 1;
-	}
+#else /* CONFIG_KVM_GUEST */
+#define kvm_guest_init() do {} while (0)
+#define kvm_async_pf_task_wait(T) do {} while(0)
+#define kvm_async_pf_task_wake(T) do {} while(0)
 
+static inline bool kvm_para_available(void)
+{
 	return 0;
 }
 
 static inline unsigned int kvm_arch_para_features(void)
 {
-	return cpuid_eax(KVM_CPUID_FEATURES);
+	return 0;
 }
 
-#ifdef CONFIG_KVM_GUEST
-void __init kvm_guest_init(void);
-void kvm_async_pf_task_wait(u32 token);
-void kvm_async_pf_task_wake(u32 token);
-u32 kvm_read_and_reset_pf_reason(void);
-extern void kvm_disable_steal_time(void);
-#else
-#define kvm_guest_init() do { } while (0)
-#define kvm_async_pf_task_wait(T) do {} while(0)
-#define kvm_async_pf_task_wake(T) do {} while(0)
 static inline u32 kvm_read_and_reset_pf_reason(void)
 {
 	return 0;