Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

Pull virtio/vhost fixes from Michael Tsirkin:
 - test fixes
 - a vsock fix

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  tools/virtio: add dma stubs
  vhost/test: fix after swiotlb changes
  vhost/vsock: drop space available check for TX vq
  ringtest: test build fix

8 files changed, 60 insertions, 12 deletions

diff --git a/drivers/vhost/test.c b/drivers/vhost/test.c
index 388eec4e1a90..97fb2f8fa930 100644
--- a/drivers/vhost/test.c
+++ b/drivers/vhost/test.c
@@ -220,20 +220,20 @@ static long vhost_test_reset_owner(struct vhost_test *n)
 {
         void *priv = NULL;
         long err;
-        struct vhost_memory *memory;
+        struct vhost_umem *umem;
 
         mutex_lock(&n->dev.mutex);
         err = vhost_dev_check_owner(&n->dev);
         if (err)
                 goto done;
-        memory = vhost_dev_reset_owner_prepare();
-        if (!memory) {
+        umem = vhost_dev_reset_owner_prepare();
+        if (!umem) {
                 err = -ENOMEM;
                 goto done;
         }
         vhost_test_stop(n, &priv);
         vhost_test_flush(n);
-        vhost_dev_reset_owner(&n->dev, memory);
+        vhost_dev_reset_owner(&n->dev, umem);
 done:
         mutex_unlock(&n->dev.mutex);
         return err;
diff --git a/net/vmw_vsock/virtio_transport.c b/net/vmw_vsock/virtio_transport.c
index 699dfabdbccd..936d7eee62d0 100644
--- a/net/vmw_vsock/virtio_transport.c
+++ b/net/vmw_vsock/virtio_transport.c
@@ -87,9 +87,6 @@ virtio_transport_send_pkt_work(struct work_struct *work)
 
         vq = vsock->vqs[VSOCK_VQ_TX];
 
-        /* Avoid unnecessary interrupts while we're processing the ring */
-        virtqueue_disable_cb(vq);
-
         for (;;) {
                 struct virtio_vsock_pkt *pkt;
                 struct scatterlist hdr, buf, *sgs[2];
@@ -99,7 +96,6 @@ virtio_transport_send_pkt_work(struct work_struct *work)
                 spin_lock_bh(&vsock->send_pkt_list_lock);
                 if (list_empty(&vsock->send_pkt_list)) {
                         spin_unlock_bh(&vsock->send_pkt_list_lock);
-                        virtqueue_enable_cb(vq);
                         break;
                 }
 
@@ -118,13 +114,13 @@ virtio_transport_send_pkt_work(struct work_struct *work)
                 }
 
                 ret = virtqueue_add_sgs(vq, sgs, out_sg, in_sg, pkt, GFP_KERNEL);
+                /* Usually this means that there is no more space available in
+                 * the vq
+                 */
                 if (ret < 0) {
                         spin_lock_bh(&vsock->send_pkt_list_lock);
                         list_add(&pkt->list, &vsock->send_pkt_list);
                         spin_unlock_bh(&vsock->send_pkt_list_lock);
-
-                        if (!virtqueue_enable_cb(vq) && ret == -ENOSPC)
-                                continue; /* retry now that we have more space */
                         break;
                 }
 
diff --git a/tools/virtio/linux/dma-mapping.h b/tools/virtio/linux/dma-mapping.h
index 4f93af89ae16..18601f6689b9 100644
--- a/tools/virtio/linux/dma-mapping.h
+++ b/tools/virtio/linux/dma-mapping.h
@@ -14,4 +14,20 @@ enum dma_data_direction {
         DMA_NONE = 3,
 };
 
+#define dma_alloc_coherent(d, s, hp, f) ({ \
+        void *__dma_alloc_coherent_p = kmalloc((s), (f)); \
+        *(hp) = (unsigned long)__dma_alloc_coherent_p; \
+        __dma_alloc_coherent_p; \
+})
+
+#define dma_free_coherent(d, s, p, h) kfree(p)
+
+#define dma_map_page(d, p, o, s, dir) (page_to_phys(p) + (o))
+
+#define dma_map_single(d, p, s, dir) (virt_to_phys(p))
+#define dma_mapping_error(...) (0)
+
+#define dma_unmap_single(...) do { } while (0)
+#define dma_unmap_page(...) do { } while (0)
+
 #endif
diff --git a/tools/virtio/linux/kernel.h b/tools/virtio/linux/kernel.h
index 033849948215..d9554fc3f340 100644
--- a/tools/virtio/linux/kernel.h
+++ b/tools/virtio/linux/kernel.h
@@ -20,7 +20,9 @@
 
 #define PAGE_SIZE getpagesize()
 #define PAGE_MASK (~(PAGE_SIZE-1))
+#define PAGE_ALIGN(x) ((x + PAGE_SIZE - 1) & PAGE_MASK)
 
+typedef unsigned long long phys_addr_t;
 typedef unsigned long long dma_addr_t;
 typedef size_t __kernel_size_t;
 typedef unsigned int __wsum;
@@ -57,6 +59,11 @@ static inline void *kzalloc(size_t s, gfp_t gfp)
         return p;
 }
 
+static inline void *alloc_pages_exact(size_t s, gfp_t gfp)
+{
+        return kmalloc(s, gfp);
+}
+
 static inline void kfree(void *p)
 {
         if (p >= __kfree_ignore_start && p < __kfree_ignore_end)
@@ -64,6 +71,11 @@ static inline void kfree(void *p)
         free(p);
 }
 
+static inline void free_pages_exact(void *p, size_t s)
+{
+        kfree(p);
+}
+
 static inline void *krealloc(void *p, size_t s, gfp_t gfp)
 {
         return realloc(p, s);
@@ -105,6 +117,8 @@ static inline void free_page(unsigned long addr)
 #define dev_err(dev, format, ...) fprintf (stderr, format, ## __VA_ARGS__)
 #define dev_warn(dev, format, ...) fprintf (stderr, format, ## __VA_ARGS__)
 
+#define WARN_ON_ONCE(cond) ((cond) && fprintf (stderr, "WARNING\n"))
+
 #define min(x, y) ({                            \
         typeof(x) _min1 = (x);                  \
         typeof(y) _min2 = (y);                  \
diff --git a/tools/virtio/linux/slab.h b/tools/virtio/linux/slab.h
index 81baeac8ae40..7e1c1197d439 100644
--- a/tools/virtio/linux/slab.h
+++ b/tools/virtio/linux/slab.h
@@ -1,2 +1,6 @@
 #ifndef LINUX_SLAB_H
+#define GFP_KERNEL 0
+#define GFP_ATOMIC 0
+#define __GFP_NOWARN 0
+#define __GFP_ZERO 0
 #endif
diff --git a/tools/virtio/linux/virtio.h b/tools/virtio/linux/virtio.h
index ee125e714053..9377c8b4ac16 100644
--- a/tools/virtio/linux/virtio.h
+++ b/tools/virtio/linux/virtio.h
@@ -3,8 +3,12 @@
 #include <linux/scatterlist.h>
 #include <linux/kernel.h>
 
+struct device {
+        void *parent;
+};
+
 struct virtio_device {
-        void *dev;
+        struct device dev;
         u64 features;
 };
 
diff --git a/tools/virtio/linux/virtio_config.h b/tools/virtio/linux/virtio_config.h
index 57a6964a1e35..9ba11815e0a1 100644
--- a/tools/virtio/linux/virtio_config.h
+++ b/tools/virtio/linux/virtio_config.h
@@ -40,6 +40,19 @@ static inline void __virtio_clear_bit(struct virtio_device *vdev,
 #define virtio_has_feature(dev, feature) \
         (__virtio_test_bit((dev), feature))
 
+/**
+ * virtio_has_iommu_quirk - determine whether this device has the iommu quirk
+ * @vdev: the device
+ */
+static inline bool virtio_has_iommu_quirk(const struct virtio_device *vdev)
+{
+        /*
+         * Note the reverse polarity of the quirk feature (compared to most
+         * other features), this is for compatibility with legacy systems.
+         */
+        return !virtio_has_feature(vdev, VIRTIO_F_IOMMU_PLATFORM);
+}
+
 static inline bool virtio_is_little_endian(struct virtio_device *vdev)
 {
         return virtio_has_feature(vdev, VIRTIO_F_VERSION_1) ||
diff --git a/tools/virtio/ringtest/ptr_ring.c b/tools/virtio/ringtest/ptr_ring.c
index 68e4f9f0da3a..bd2ad1d3b7a9 100644
--- a/tools/virtio/ringtest/ptr_ring.c
+++ b/tools/virtio/ringtest/ptr_ring.c
@@ -13,6 +13,7 @@
 #define cache_line_size() SMP_CACHE_BYTES
 #define ____cacheline_aligned_in_smp __attribute__ ((aligned (SMP_CACHE_BYTES)))
 #define unlikely(x)    (__builtin_expect(!!(x), 0))
+#define likely(x)    (__builtin_expect(!!(x), 1))
 #define ALIGN(x, a) (((x) + (a) - 1) / (a) * (a))
 typedef pthread_spinlock_t  spinlock_t;