5 files changed, 21 insertions, 16 deletions

diff --git a/arch/x86/kvm/i8254.c b/arch/x86/kvm/i8254.c
index 296aba49472a..15578f180e59 100644
--- a/arch/x86/kvm/i8254.c
+++ b/arch/x86/kvm/i8254.c
@@ -467,6 +467,9 @@ static int pit_ioport_read(struct kvm_io_device *this,
                 return -EOPNOTSUPP;
 
         addr &= KVM_PIT_CHANNEL_MASK;
+        if (addr == 3)
+                return 0;
+
         s = &pit_state->channels[addr];
 
         mutex_lock(&pit_state->lock);
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 3063a0c4858b..ba8c045da782 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -373,6 +373,12 @@ static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode,
                 if (unlikely(!apic_enabled(apic)))
                         break;
 
+                if (trig_mode) {
+                        apic_debug("level trig mode for vector %d", vector);
+                        apic_set_vector(vector, apic->regs + APIC_TMR);
+                } else
+                        apic_clear_vector(vector, apic->regs + APIC_TMR);
+
                 result = !apic_test_and_set_irr(vector, apic);
                 trace_kvm_apic_accept_irq(vcpu->vcpu_id, delivery_mode,
                                           trig_mode, vector, !result);
@@ -383,11 +389,6 @@ static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode,
                         break;
                 }
 
-                if (trig_mode) {
-                        apic_debug("level trig mode for vector %d", vector);
-                        apic_set_vector(vector, apic->regs + APIC_TMR);
-                } else
-                        apic_clear_vector(vector, apic->regs + APIC_TMR);
                 kvm_vcpu_kick(vcpu);
                 break;
 
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 4c3e5b2314cb..89a49fb46a27 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -477,7 +477,7 @@ static int host_mapping_level(struct kvm *kvm, gfn_t gfn)
 
         addr = gfn_to_hva(kvm, gfn);
         if (kvm_is_error_hva(addr))
-                return page_size;
+                return PT_PAGE_TABLE_LEVEL;
 
         down_read(&current->mm->mmap_sem);
         vma = find_vma(current->mm, addr);
@@ -515,11 +515,9 @@ static int mapping_level(struct kvm_vcpu *vcpu, gfn_t large_gfn)
         if (host_level == PT_PAGE_TABLE_LEVEL)
                 return host_level;
 
-        for (level = PT_DIRECTORY_LEVEL; level <= host_level; ++level) {
-
+        for (level = PT_DIRECTORY_LEVEL; level <= host_level; ++level)
                 if (has_wrprotected_page(vcpu->kvm, large_gfn, level))
                         break;
-        }
 
         return level - 1;
 }
diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h
index 58a0f1e88596..ede2131a9225 100644
--- a/arch/x86/kvm/paging_tmpl.h
+++ b/arch/x86/kvm/paging_tmpl.h
@@ -150,7 +150,9 @@ walk:
                 walker->table_gfn[walker->level - 1] = table_gfn;
                 walker->pte_gpa[walker->level - 1] = pte_gpa;
 
-                kvm_read_guest(vcpu->kvm, pte_gpa, &pte, sizeof(pte));
+                if (kvm_read_guest(vcpu->kvm, pte_gpa, &pte, sizeof(pte)))
+                        goto not_present;
+
                 trace_kvm_mmu_paging_element(pte, walker->level);
 
                 if (!is_present_gpte(pte))
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 6651dbf58675..a1e1bc9d412d 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -670,7 +670,7 @@ static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock)
 {
         static int version;
         struct pvclock_wall_clock wc;
-        struct timespec now, sys, boot;
+        struct timespec boot;
 
         if (!wall_clock)
                 return;
@@ -685,9 +685,7 @@ static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock)
          * wall clock specified here.  guest system time equals host
          * system time for us, thus we must fill in host boot time here.
          */
-        now = current_kernel_time();
-        ktime_get_ts(&sys);
-        boot = ns_to_timespec(timespec_to_ns(&now) - timespec_to_ns(&sys));
+        getboottime(&boot);
 
         wc.sec = boot.tv_sec;
         wc.nsec = boot.tv_nsec;
@@ -762,6 +760,7 @@ static void kvm_write_guest_time(struct kvm_vcpu *v)
         local_irq_save(flags);
         kvm_get_msr(v, MSR_IA32_TSC, &vcpu->hv_clock.tsc_timestamp);
         ktime_get_ts(&ts);
+        monotonic_to_bootbased(&ts);
         local_irq_restore(flags);
 
         /* With all the info we got, fill in the values */
@@ -5072,12 +5071,13 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
                                        GFP_KERNEL);
         if (!vcpu->arch.mce_banks) {
                 r = -ENOMEM;
-                goto fail_mmu_destroy;
+                goto fail_free_lapic;
         }
         vcpu->arch.mcg_cap = KVM_MAX_MCE_BANKS;
 
         return 0;
-
+fail_free_lapic:
+        kvm_free_lapic(vcpu);
 fail_mmu_destroy:
         kvm_mmu_destroy(vcpu);
 fail_free_pio_data:
@@ -5088,6 +5088,7 @@ fail:
 
 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
 {
+        kfree(vcpu->arch.mce_banks);
         kvm_free_lapic(vcpu);
         down_read(&vcpu->kvm->slots_lock);
         kvm_mmu_destroy(vcpu);