KVM: x86: Allow ARAT CPU feature
authorJan Kiszka <jan.kiszka@siemens.com>
Sun, 24 May 2015 15:22:38 +0000 (17:22 +0200)
committerPaolo Bonzini <pbonzini@redhat.com>
Thu, 28 May 2015 08:43:37 +0000 (10:43 +0200)
There is no reason to deny this feature to guests. We are emulating the
APIC timer, thus are exposing it without stops in power-saving states.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
arch/x86/kvm/cpuid.c

index 92a74a0..9dadf8d 100644 (file)
@@ -415,6 +415,12 @@ static inline int __do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
                }
                break;
        }
+       case 6: /* Thermal management */
+               entry->eax = 0x4; /* allow ARAT */
+               entry->ebx = 0;
+               entry->ecx = 0;
+               entry->edx = 0;
+               break;
        case 7: {
                entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
                /* Mask ebx against host capability word 9 */
@@ -591,7 +597,6 @@ static inline int __do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
                break;
        case 3: /* Processor serial number */
        case 5: /* MONITOR/MWAIT */
-       case 6: /* Thermal management */
        case 0xC0000002:
        case 0xC0000003:
        case 0xC0000004: