static void kvm_free_vcpu(struct kvm_vcpu *vcpu)
{
+ vcpu_load(vcpu->kvm, vcpu_slot(vcpu));
kvm_mmu_destroy(vcpu);
+ vcpu_put(vcpu);
kvm_arch_ops->vcpu_free(vcpu);
}
vcpu->cr3 = cr3;
spin_lock(&vcpu->kvm->lock);
- vcpu->mmu.new_cr3(vcpu);
+ /*
+ * Does the new cr3 value map to physical memory? (Note, we
+ * catch an invalid cr3 even in real-mode, because it would
+ * cause trouble later on when we turn on paging anyway.)
+ *
+ * A real CPU would silently accept an invalid cr3 and would
+ * attempt to use it - with largely undefined (and often hard
+ * to debug) behavior on the guest side.
+ */
+ if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT)))
+ inject_gp(vcpu);
+ else
+ vcpu->mmu.new_cr3(vcpu);
spin_unlock(&vcpu->kvm->lock);
}
EXPORT_SYMBOL_GPL(set_cr3);
case MSR_IA32_APICBASE:
data = vcpu->apic_base;
break;
+ case MSR_IA32_MISC_ENABLE:
+ data = vcpu->ia32_misc_enable_msr;
+ break;
#ifdef CONFIG_X86_64
case MSR_EFER:
data = vcpu->shadow_efer;
case MSR_IA32_APICBASE:
vcpu->apic_base = data;
break;
+ case MSR_IA32_MISC_ENABLE:
+ vcpu->ia32_misc_enable_msr = data;
+ break;
default:
printk(KERN_ERR "kvm: unhandled wrmsr: 0x%x\n", msr);
return 1;
static unsigned num_msrs_to_save;
+static u32 emulated_msrs[] = {
+ MSR_IA32_MISC_ENABLE,
+};
+
static __init void kvm_init_msr_list(void)
{
u32 dummy[2];
if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list))
goto out;
n = msr_list.nmsrs;
- msr_list.nmsrs = num_msrs_to_save;
+ msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs);
if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list))
goto out;
r = -E2BIG;
if (copy_to_user(user_msr_list->indices, &msrs_to_save,
num_msrs_to_save * sizeof(u32)))
goto out;
+ if (copy_to_user(user_msr_list->indices
+ + num_msrs_to_save * sizeof(u32),
+ &emulated_msrs,
+ ARRAY_SIZE(emulated_msrs) * sizeof(u32)))
+ goto out;
r = 0;
break;
}