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Commit 371bcf64 authored by Glauber Costa's avatar Glauber Costa Committed by Avi Kivity
Browse files

KVM: x86: Tell the guest we'll warn it about tsc stability 



This patch puts up the flag that tells the guest that we'll warn it
about the tsc being trustworthy or not. By now, we also say
it is not.

Signed-off-by: default avatarGlauber Costa <glommer@redhat.com>
Acked-by: default avatarZachary Amsden <zamsden@redhat.com>
Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
parent 3a0d7256

arch/x86/kvm/x86.c

+4 −1
Original line number Diff line number Diff line
@@ -857,6 +857,8 @@ static void kvm_write_guest_time(struct kvm_vcpu *v) 
	vcpu->hv_clock.system_time = ts.tv_nsec +

				     (NSEC_PER_SEC * (u64)ts.tv_sec) + v->kvm->arch.kvmclock_offset;



	vcpu->hv_clock.flags = 0;



	/*

	 * The interface expects us to write an even number signaling that the

	 * update is finished. Since the guest won't see the intermediate
@@ -1984,7 +1986,8 @@ static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function, 
	case KVM_CPUID_FEATURES:

		entry->eax = (1 << KVM_FEATURE_CLOCKSOURCE) |

			     (1 << KVM_FEATURE_NOP_IO_DELAY) |

			     (1 << KVM_FEATURE_CLOCKSOURCE2);

			     (1 << KVM_FEATURE_CLOCKSOURCE2) |

			     (1 << KVM_FEATURE_CLOCKSOURCE_STABLE_BIT);

		entry->ebx = 0;

		entry->ecx = 0;

		entry->edx = 0;