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KVM: x86: Allow ARAT CPU feature 

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>
This commit is contained in:
Jan Kiszka 2015-05-24 17:22:38 +02:00 committed by Paolo Bonzini
parent c028dd6bb6
commit e453aa0f7e
1 changed files with 6 additions and 1 deletions
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7
arch/x86/kvm/cpuid.c
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@ -415,6 +415,12 @@ static inline int __do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
} }
break; break;
} }
case 6: /* Thermal management */
entry->eax = 0x4; /* allow ARAT */
entry->ebx = 0;
entry->ecx = 0;
entry->edx = 0;
break;
case 7: { case 7: {
entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
/* Mask ebx against host capability word 9 */ /* 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; break;
case 3: /* Processor serial number */ case 3: /* Processor serial number */
case 5: /* MONITOR/MWAIT */ case 5: /* MONITOR/MWAIT */
case 6: /* Thermal management */
case 0xC0000002: case 0xC0000002:
case 0xC0000003: case 0xC0000003:
case 0xC0000004: case 0xC0000004: