Merge remote-tracking branch 'remotes/mst/tags/for_upstream' into staging

virtio, vhost, pc: fixes, features

writeable fw cfg blobs which will be used for guest to host
communication
fixes and cleanups all over the place

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

# gpg: Signature made Thu 19 Jan 2017 21:08:04 GMT
# gpg:                using RSA key 0x281F0DB8D28D5469
# gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>"
# gpg:                 aka "Michael S. Tsirkin <mst@redhat.com>"
# Primary key fingerprint: 0270 606B 6F3C DF3D 0B17  0970 C350 3912 AFBE 8E67
#      Subkey fingerprint: 5D09 FD08 71C8 F85B 94CA  8A0D 281F 0DB8 D28D 5469

* remotes/mst/tags/for_upstream:
  virtio: force VIRTIO_F_IOMMU_PLATFORM
  virtio: fix up max size checks
  vhost: drop VHOST_F_DEVICE_IOTLB
  update-linux-headers.sh: support __bitwise
  virtio_crypto: header update
  pci_regs: update to latest linux
  virtio-mmio: switch to linux headers
  virtio_mmio: add standard header file
  virtio: drop an obsolete comment
  fw-cfg: bump "x-file-slots" to 0x20 for 2.9+ machine types
  pc: Add 2.9 machine-types
  fw-cfg: turn FW_CFG_FILE_SLOTS into a device property
  fw-cfg: support writeable blobs
  vhost_net: device IOTLB support
  virtio: disable notifications again after poll succeeded
  Revert "virtio: turn vq->notification into a nested counter"
  virtio-net: enable ioeventfd even if vhost=off

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 99 insertions, 0 deletions

diff --git a/hw/virtio/vhost-backend.c b/hw/virtio/vhost-backend.c
index 272a5ec584..be927b891e 100644
--- a/hw/virtio/vhost-backend.c
+++ b/hw/virtio/vhost-backend.c
@@ -185,6 +185,102 @@ static int vhost_kernel_vsock_set_running(struct vhost_dev *dev, int start)
 }
 #endif /* CONFIG_VHOST_VSOCK */
 
+static void vhost_kernel_iotlb_read(void *opaque)
+{
+    struct vhost_dev *dev = opaque;
+    struct vhost_msg msg;
+    ssize_t len;
+
+    while ((len = read((uintptr_t)dev->opaque, &msg, sizeof msg)) > 0) {
+        struct vhost_iotlb_msg *imsg = &msg.iotlb;
+        if (len < sizeof msg) {
+            error_report("Wrong vhost message len: %d", (int)len);
+            break;
+        }
+        if (msg.type != VHOST_IOTLB_MSG) {
+            error_report("Unknown vhost iotlb message type");
+            break;
+        }
+        switch (imsg->type) {
+        case VHOST_IOTLB_MISS:
+            vhost_device_iotlb_miss(dev, imsg->iova,
+                                    imsg->perm != VHOST_ACCESS_RO);
+            break;
+        case VHOST_IOTLB_UPDATE:
+        case VHOST_IOTLB_INVALIDATE:
+            error_report("Unexpected IOTLB message type");
+            break;
+        case VHOST_IOTLB_ACCESS_FAIL:
+            /* FIXME: report device iotlb error */
+            break;
+        default:
+            break;
+        }
+    }
+}
+
+static int vhost_kernel_update_device_iotlb(struct vhost_dev *dev,
+                                            uint64_t iova, uint64_t uaddr,
+                                            uint64_t len,
+                                            IOMMUAccessFlags perm)
+{
+    struct vhost_msg msg;
+    msg.type = VHOST_IOTLB_MSG;
+    msg.iotlb.iova =  iova;
+    msg.iotlb.uaddr = uaddr;
+    msg.iotlb.size = len;
+    msg.iotlb.type = VHOST_IOTLB_UPDATE;
+
+    switch (perm) {
+    case IOMMU_RO:
+        msg.iotlb.perm = VHOST_ACCESS_RO;
+        break;
+    case IOMMU_WO:
+        msg.iotlb.perm = VHOST_ACCESS_WO;
+        break;
+    case IOMMU_RW:
+        msg.iotlb.perm = VHOST_ACCESS_RW;
+        break;
+    default:
+        g_assert_not_reached();
+    }
+
+    if (write((uintptr_t)dev->opaque, &msg, sizeof msg) != sizeof msg) {
+        error_report("Fail to update device iotlb");
+        return -EFAULT;
+    }
+
+    return 0;
+}
+
+static int vhost_kernel_invalidate_device_iotlb(struct vhost_dev *dev,
+                                                uint64_t iova, uint64_t len)
+{
+    struct vhost_msg msg;
+
+    msg.type = VHOST_IOTLB_MSG;
+    msg.iotlb.iova = iova;
+    msg.iotlb.size = len;
+    msg.iotlb.type = VHOST_IOTLB_INVALIDATE;
+
+    if (write((uintptr_t)dev->opaque, &msg, sizeof msg) != sizeof msg) {
+        error_report("Fail to invalidate device iotlb");
+        return -EFAULT;
+    }
+
+    return 0;
+}
+
+static void vhost_kernel_set_iotlb_callback(struct vhost_dev *dev,
+                                           int enabled)
+{
+    if (enabled)
+        qemu_set_fd_handler((uintptr_t)dev->opaque,
+                            vhost_kernel_iotlb_read, NULL, dev);
+    else
+        qemu_set_fd_handler((uintptr_t)dev->opaque, NULL, NULL, NULL);
+}
+
 static const VhostOps kernel_ops = {
         .backend_type = VHOST_BACKEND_TYPE_KERNEL,
         .vhost_backend_init = vhost_kernel_init,
@@ -214,6 +310,9 @@ static const VhostOps kernel_ops = {
         .vhost_vsock_set_guest_cid = vhost_kernel_vsock_set_guest_cid,
         .vhost_vsock_set_running = vhost_kernel_vsock_set_running,
 #endif /* CONFIG_VHOST_VSOCK */
+        .vhost_set_iotlb_callback = vhost_kernel_set_iotlb_callback,
+        .vhost_update_device_iotlb = vhost_kernel_update_device_iotlb,
+        .vhost_invalidate_device_iotlb = vhost_kernel_invalidate_device_iotlb,
 };
 
 int vhost_set_backend_type(struct vhost_dev *dev, VhostBackendType backend_type)