diff options
Diffstat (limited to 'arch/x86/kvm/lapic.c')
| -rw-r--r-- | arch/x86/kvm/lapic.c | 25 |
1 files changed, 15 insertions, 10 deletions
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index c98b44d0ffe6..6e8ce5a1a05d 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -160,29 +160,34 @@ static void recalculate_apic_map(struct kvm *kvm) if (!kvm_apic_present(vcpu)) continue; - /* - * All APICs have to be configured in the same mode by an OS. - * We take advatage of this while building logical id loockup - * table. After reset APICs are in xapic/flat mode, so if we - * find apic with different setting we assume this is the mode - * OS wants all apics to be in; build lookup table accordingly. - */ if (apic_x2apic_mode(apic)) { new->ldr_bits = 32; new->cid_shift = 16; new->cid_mask = (1 << KVM_X2APIC_CID_BITS) - 1; new->lid_mask = 0xffff; new->broadcast = X2APIC_BROADCAST; - break; - } else if (kvm_apic_sw_enabled(apic)) { + } else if (kvm_apic_get_reg(apic, APIC_LDR)) { if (kvm_apic_get_reg(apic, APIC_DFR) == APIC_DFR_CLUSTER) { new->cid_shift = 4; new->cid_mask = 0xf; new->lid_mask = 0xf; + } else { + new->cid_shift = 8; + new->cid_mask = 0; + new->lid_mask = 0xff; } - break; } + + /* + * All APICs have to be configured in the same mode by an OS. + * We take advatage of this while building logical id loockup + * table. After reset APICs are in software disabled mode, so if + * we find apic with different setting we assume this is the mode + * OS wants all apics to be in; build lookup table accordingly. + */ + if (kvm_apic_sw_enabled(apic)) + break; } kvm_for_each_vcpu(i, vcpu, kvm) { |