virtio/test: fix up after IOTLB changes

Allow building vringh without IOTLB (that's the case for userspace
builds, will be useful for CAIF/VOD down the road too).
Update for API tweaks.
Don't include vringh with userspace builds.

Cc: Jason Wang <jasowang@redhat.com>
Cc: Eugenio Pérez <eperezma@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>

drivers/vhost/Kconfig

@@ -3,6 +3,8 @@ config VHOST_IOTLB
 	tristate
 	help
 	  Generic IOTLB implementation for vhost and vringh.
+	  This option is selected by any driver which needs to support
+	  an IOMMU in software.
 
 config VHOST_RING
 	tristate

drivers/vhost/test.c

@@ -120,7 +120,7 @@ static int vhost_test_open(struct inode *inode, struct file *f)
 	vqs[VHOST_TEST_VQ] = &n->vqs[VHOST_TEST_VQ];
 	n->vqs[VHOST_TEST_VQ].handle_kick = handle_vq_kick;
 	vhost_dev_init(dev, vqs, VHOST_TEST_VQ_MAX, UIO_MAXIOV,
-		       VHOST_TEST_PKT_WEIGHT, VHOST_TEST_WEIGHT);
+		       VHOST_TEST_PKT_WEIGHT, VHOST_TEST_WEIGHT, NULL);
 
 	f->private_data = n;
 
@@ -225,7 +225,7 @@ static long vhost_test_reset_owner(struct vhost_test *n)
 {
 	void *priv = NULL;
 	long err;
-	struct vhost_umem *umem;
+	struct vhost_iotlb *umem;
 
 	mutex_lock(&n->dev.mutex);
 	err = vhost_dev_check_owner(&n->dev);

drivers/vhost/vringh.c

@@ -13,9 +13,11 @@
 #include <linux/uaccess.h>
 #include <linux/slab.h>
 #include <linux/export.h>
+#if IS_REACHABLE(CONFIG_VHOST_IOTLB)
 #include <linux/bvec.h>
 #include <linux/highmem.h>
 #include <linux/vhost_iotlb.h>
+#endif
 #include <uapi/linux/virtio_config.h>
 
 static __printf(1,2) __cold void vringh_bad(const char *fmt, ...)
@@ -1059,6 +1061,8 @@ int vringh_need_notify_kern(struct vringh *vrh)
 }
 EXPORT_SYMBOL(vringh_need_notify_kern);
 
+#if IS_REACHABLE(CONFIG_VHOST_IOTLB)
+
 static int iotlb_translate(const struct vringh *vrh,
 			   u64 addr, u64 len, struct bio_vec iov[],
 			   int iov_size, u32 perm)
@@ -1416,5 +1420,6 @@ int vringh_need_notify_iotlb(struct vringh *vrh)
 }
 EXPORT_SYMBOL(vringh_need_notify_iotlb);
 
+#endif
 
 MODULE_LICENSE("GPL");

include/linux/vringh.h

@@ -14,8 +14,10 @@
 #include <linux/virtio_byteorder.h>
 #include <linux/uio.h>
 #include <linux/slab.h>
+#if IS_REACHABLE(CONFIG_VHOST_IOTLB)
 #include <linux/dma-direction.h>
 #include <linux/vhost_iotlb.h>
+#endif
 #include <asm/barrier.h>
 
 /* virtio_ring with information needed for host access. */
@@ -254,6 +256,8 @@ static inline __virtio64 cpu_to_vringh64(const struct vringh *vrh, u64 val)
 	return __cpu_to_virtio64(vringh_is_little_endian(vrh), val);
 }
 
+#if IS_REACHABLE(CONFIG_VHOST_IOTLB)
+
 void vringh_set_iotlb(struct vringh *vrh, struct vhost_iotlb *iotlb);
 
 int vringh_init_iotlb(struct vringh *vrh, u64 features,
@@ -284,4 +288,6 @@ void vringh_notify_disable_iotlb(struct vringh *vrh);
 
 int vringh_need_notify_iotlb(struct vringh *vrh);
 
+#endif /* CONFIG_VHOST_IOTLB */
+
 #endif /* _LINUX_VRINGH_H */

tools/virtio/Makefile

@@ -4,7 +4,7 @@ test: virtio_test vringh_test
 virtio_test: virtio_ring.o virtio_test.o
 vringh_test: vringh_test.o vringh.o virtio_ring.o
 
-CFLAGS += -g -O2 -Werror -Wall -I. -I../include/ -I ../../usr/include/ -Wno-pointer-sign -fno-strict-overflow -fno-strict-aliasing -fno-common -MMD -U_FORTIFY_SOURCE
+CFLAGS += -g -O2 -Werror -Wall -I. -I../include/ -I ../../usr/include/ -Wno-pointer-sign -fno-strict-overflow -fno-strict-aliasing -fno-common -MMD -U_FORTIFY_SOURCE -include ../../include/linux/kconfig.h
 vpath %.c ../../drivers/virtio ../../drivers/vhost
 mod:
 	${MAKE} -C `pwd`/../.. M=`pwd`/vhost_test V=${V}
@@ -22,7 +22,8 @@ OOT_CONFIGS=\
 	CONFIG_VHOST=m \
 	CONFIG_VHOST_NET=n \
 	CONFIG_VHOST_SCSI=n \
-	CONFIG_VHOST_VSOCK=n
+	CONFIG_VHOST_VSOCK=n \
+	CONFIG_VHOST_RING=n
 OOT_BUILD=KCFLAGS="-I "${OOT_VHOST} ${MAKE} -C ${OOT_KSRC} V=${V}
 oot-build:
 	echo "UNSUPPORTED! Don't use the resulting modules in production!"