KVM: nVMX: Don't leak L1 MMIO regions to L2

[linux-2.6-microblaze.git] / arch / x86 / kvm / x86.c

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 661e2bf..ff395f8 100644 (file)
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -360,8 +360,7 @@ EXPORT_SYMBOL_GPL(kvm_set_apic_base);
 asmlinkage __visible void kvm_spurious_fault(void)
 {
        /* Fault while not rebooting.  We want the trace. */
-       if (!kvm_rebooting)
-               BUG();
+       BUG_ON(!kvm_rebooting);
 }
 EXPORT_SYMBOL_GPL(kvm_spurious_fault);
 
@@ -2537,6 +2536,7 @@ static int kvm_pv_enable_async_pf(struct kvm_vcpu *vcpu, u64 data)
 static void kvmclock_reset(struct kvm_vcpu *vcpu)
 {
        vcpu->arch.pv_time_enabled = false;
+       vcpu->arch.time = 0;
 }
 
 static void kvm_vcpu_flush_tlb(struct kvm_vcpu *vcpu, bool invalidate_gpa)
@@ -2702,8 +2702,6 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
        case MSR_KVM_SYSTEM_TIME: {
                struct kvm_arch *ka = &vcpu->kvm->arch;
 
-               kvmclock_reset(vcpu);
-
                if (vcpu->vcpu_id == 0 && !msr_info->host_initiated) {
                        bool tmp = (msr == MSR_KVM_SYSTEM_TIME);
 
@@ -2717,14 +2715,13 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
                kvm_make_request(KVM_REQ_GLOBAL_CLOCK_UPDATE, vcpu);
 
                /* we verify if the enable bit is set... */
+               vcpu->arch.pv_time_enabled = false;
                if (!(data & 1))
                        break;
 
-               if (kvm_gfn_to_hva_cache_init(vcpu->kvm,
+               if (!kvm_gfn_to_hva_cache_init(vcpu->kvm,
                     &vcpu->arch.pv_time, data & ~1ULL,
                     sizeof(struct pvclock_vcpu_time_info)))
-                       vcpu->arch.pv_time_enabled = false;
-               else
                        vcpu->arch.pv_time_enabled = true;
 
                break;
@@ -7941,8 +7938,12 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
        bool req_immediate_exit = false;
 
        if (kvm_request_pending(vcpu)) {
-               if (kvm_check_request(KVM_REQ_GET_VMCS12_PAGES, vcpu))
-                       kvm_x86_ops->get_vmcs12_pages(vcpu);
+               if (kvm_check_request(KVM_REQ_GET_VMCS12_PAGES, vcpu)) {
+                       if (unlikely(!kvm_x86_ops->get_vmcs12_pages(vcpu))) {
+                               r = 0;
+                               goto out;
+                       }
+               }
                if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu))
                        kvm_mmu_unload(vcpu);
                if (kvm_check_request(KVM_REQ_MIGRATE_TIMER, vcpu))