Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

[GitHub/exynos8895/android_kernel_samsung_universal8895.git] / arch / x86 / kvm / lapic.c

diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 1ac0093907800cd1d0e24393059b4e706d1384d2..9736529ade08d727cbaa7db12a330ce86e5ea9c6 100644 (file)
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -140,6 +140,8 @@ static inline int kvm_apic_id(struct kvm_lapic *apic)
        return (kvm_apic_get_reg(apic, APIC_ID) >> 24) & 0xff;
 }
 
+#define KVM_X2APIC_CID_BITS 0
+
 static void recalculate_apic_map(struct kvm *kvm)
 {
        struct kvm_apic_map *new, *old = NULL;
@@ -177,7 +179,8 @@ static void recalculate_apic_map(struct kvm *kvm)
                if (apic_x2apic_mode(apic)) {
                        new->ldr_bits = 32;
                        new->cid_shift = 16;
-                       new->cid_mask = new->lid_mask = 0xffff;
+                       new->cid_mask = (1 << KVM_X2APIC_CID_BITS) - 1;
+                       new->lid_mask = 0xffff;
                } else if (kvm_apic_sw_enabled(apic) &&
                                !new->cid_mask /* flat mode */ &&
                                kvm_apic_get_reg(apic, APIC_DFR) == APIC_DFR_CLUSTER) {
@@ -838,7 +841,8 @@ static u32 apic_get_tmcct(struct kvm_lapic *apic)
        ASSERT(apic != NULL);
 
        /* if initial count is 0, current count should also be 0 */
-       if (kvm_apic_get_reg(apic, APIC_TMICT) == 0)
+       if (kvm_apic_get_reg(apic, APIC_TMICT) == 0 ||
+               apic->lapic_timer.period == 0)
                return 0;
 
        remaining = hrtimer_get_remaining(&apic->lapic_timer.timer);
@@ -1343,8 +1347,12 @@ void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value)
                return;
        }
 
+       if (!kvm_vcpu_is_bsp(apic->vcpu))
+               value &= ~MSR_IA32_APICBASE_BSP;
+       vcpu->arch.apic_base = value;
+
        /* update jump label if enable bit changes */
-       if ((vcpu->arch.apic_base ^ value) & MSR_IA32_APICBASE_ENABLE) {
+       if ((old_value ^ value) & MSR_IA32_APICBASE_ENABLE) {
                if (value & MSR_IA32_APICBASE_ENABLE)
                        static_key_slow_dec_deferred(&apic_hw_disabled);
                else
@@ -1352,10 +1360,6 @@ void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value)
                recalculate_apic_map(vcpu->kvm);
        }
 
-       if (!kvm_vcpu_is_bsp(apic->vcpu))
-               value &= ~MSR_IA32_APICBASE_BSP;
-
-       vcpu->arch.apic_base = value;
        if ((old_value ^ value) & X2APIC_ENABLE) {
                if (value & X2APIC_ENABLE) {
                        u32 id = kvm_apic_id(apic);
@@ -1688,7 +1692,6 @@ static void apic_sync_pv_eoi_from_guest(struct kvm_vcpu *vcpu,
 void kvm_lapic_sync_from_vapic(struct kvm_vcpu *vcpu)
 {
        u32 data;
-       void *vapic;
 
        if (test_bit(KVM_APIC_PV_EOI_PENDING, &vcpu->arch.apic_attention))
                apic_sync_pv_eoi_from_guest(vcpu, vcpu->arch.apic);
@@ -1696,9 +1699,8 @@ void kvm_lapic_sync_from_vapic(struct kvm_vcpu *vcpu)
        if (!test_bit(KVM_APIC_CHECK_VAPIC, &vcpu->arch.apic_attention))
                return;
 
-       vapic = kmap_atomic(vcpu->arch.apic->vapic_page);
-       data = *(u32 *)(vapic + offset_in_page(vcpu->arch.apic->vapic_addr));
-       kunmap_atomic(vapic);
+       kvm_read_guest_cached(vcpu->kvm, &vcpu->arch.apic->vapic_cache, &data,
+                               sizeof(u32));
 
        apic_set_tpr(vcpu->arch.apic, data & 0xff);
 }
@@ -1734,7 +1736,6 @@ void kvm_lapic_sync_to_vapic(struct kvm_vcpu *vcpu)
        u32 data, tpr;
        int max_irr, max_isr;
        struct kvm_lapic *apic = vcpu->arch.apic;
-       void *vapic;
 
        apic_sync_pv_eoi_to_guest(vcpu, apic);
 
@@ -1750,18 +1751,24 @@ void kvm_lapic_sync_to_vapic(struct kvm_vcpu *vcpu)
                max_isr = 0;
        data = (tpr & 0xff) | ((max_isr & 0xf0) << 8) | (max_irr << 24);
 
-       vapic = kmap_atomic(vcpu->arch.apic->vapic_page);
-       *(u32 *)(vapic + offset_in_page(vcpu->arch.apic->vapic_addr)) = data;
-       kunmap_atomic(vapic);
+       kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.apic->vapic_cache, &data,
+                               sizeof(u32));
 }
 
-void kvm_lapic_set_vapic_addr(struct kvm_vcpu *vcpu, gpa_t vapic_addr)
+int kvm_lapic_set_vapic_addr(struct kvm_vcpu *vcpu, gpa_t vapic_addr)
 {
-       vcpu->arch.apic->vapic_addr = vapic_addr;
-       if (vapic_addr)
+       if (vapic_addr) {
+               if (kvm_gfn_to_hva_cache_init(vcpu->kvm,
+                                       &vcpu->arch.apic->vapic_cache,
+                                       vapic_addr, sizeof(u32)))
+                       return -EINVAL;
                __set_bit(KVM_APIC_CHECK_VAPIC, &vcpu->arch.apic_attention);
-       else
+       } else {
                __clear_bit(KVM_APIC_CHECK_VAPIC, &vcpu->arch.apic_attention);
+       }
+
+       vcpu->arch.apic->vapic_addr = vapic_addr;
+       return 0;
 }
 
 int kvm_x2apic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data)