x86, kvm: KVM paravirt kernels don't check for CPUID being unavailable

[mv-sheeva.git] / arch / x86 / include / asm / kvm_para.h

diff --git a/arch/x86/include/asm/kvm_para.h b/arch/x86/include/asm/kvm_para.h
index 734c3767cfac96075b52a39a641d4430a4fb4102..183922e13de1aa83ead2959144378e96934d4608 100644 (file)
--- a/arch/x86/include/asm/kvm_para.h
+++ b/arch/x86/include/asm/kvm_para.h
@@ -170,6 +170,9 @@ 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 */
+
        cpuid(KVM_CPUID_SIGNATURE, &eax, &ebx, &ecx, &edx);
        memcpy(signature + 0, &ebx, 4);
        memcpy(signature + 4, &ecx, 4);