addr = gfn_to_hva(kvm, gfn);
if (kvm_is_error_hva(addr))
return -EFAULT;
+ pagefault_disable();
r = __copy_from_user_inatomic(data, (void __user *)addr + offset, len);
+ pagefault_enable();
if (r)
return -EFAULT;
return 0;
if (vmf->pgoff == 0)
page = virt_to_page(vcpu->run);
+#ifdef CONFIG_X86
else if (vmf->pgoff == KVM_PIO_PAGE_OFFSET)
page = virt_to_page(vcpu->arch.pio_data);
+#endif
else
return VM_FAULT_SIGBUS;
get_page(page);
return 0;
}
-static struct file_operations kvm_vcpu_fops = {
+static const struct file_operations kvm_vcpu_fops = {
.release = kvm_vcpu_release,
.unlocked_ioctl = kvm_vcpu_ioctl,
.compat_ioctl = kvm_vcpu_ioctl,
return 0;
}
-static struct file_operations kvm_vm_fops = {
+static const struct file_operations kvm_vm_fops = {
.release = kvm_vm_release,
.unlocked_ioctl = kvm_vm_ioctl,
.compat_ioctl = kvm_vm_ioctl,
r = -EINVAL;
if (arg)
goto out;
- r = 2 * PAGE_SIZE;
+ r = PAGE_SIZE; /* struct kvm_run */
+#ifdef CONFIG_X86
+ r += PAGE_SIZE; /* pio data page */
+#endif
break;
default:
return kvm_arch_dev_ioctl(filp, ioctl, arg);