Hi all, Today's linux-next merge of the kvm tree got a conflict in arch/x86/include/asm/kvm_para.h between commit c3709e6734da ("x86, kvm: KVM paravirt kernels don't check for CPUID being unavailable") from the tip tree and commit 9b72d3b07dd9 ("KVM guest: make kvm_para_available() check hypervisor bit reading cpuid leaf") from the kvm tree. Just context changes. I fixed it up (see below) and can carry the fix as necessary. -- Cheers, Stephen Rothwell sfr@canb.auug.org.au diff --cc arch/x86/include/asm/kvm_para.h index 183922e,a7a7a94..0000000 --- a/arch/x86/include/asm/kvm_para.h +++ b/arch/x86/include/asm/kvm_para.h @@@ -170,17 -178,16 +178,19 @@@ static inline int kvm_para_available(vo 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); - memcpy(signature + 8, &edx, 4); - signature[12] = 0; + 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; - if (strcmp(signature, "KVMKVMKVM") == 0) - return 1; + if (strcmp(signature, "KVMKVMKVM") == 0) + return 1; + } return 0; }