Bjorn, Ohad, is this one good to go? Can we proceed with the next step: https://marc.info/?l=kvm&m=159060274705978&w=2 Thanks Guennadi On Tue, Jul 07, 2020 at 09:38:37AM -0600, Mathieu Poirier wrote: > On Tue, 7 Jul 2020 at 09:34, Guennadi Liakhovetski > <guennadi.liakhovetski@xxxxxxxxxxxxxxx> wrote: > > > > According to the VirtIO 1.0 spec data, sent over virtual queues must > > be in little-endian format. Update the RPMsg VirtIO implementation > > to enforce that but let legacy configurations continue use native > > endianness. > > > > Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@xxxxxxxxxxxxxxx> > > Tested-by: Arnaud Pouliquen <arnaud.pouliquen@xxxxxx> > > --- > > > > Mathieu, I had to remove your "Reviewed-by" because this is a modified version... > > > > v4: fix a left-over use of an LE value in calculation - thanks to Arnaud for catching! > > It is indeed a good catch > > Reviewed-by: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> > > > > > v3: use the virtio_byteorder.h header > > > > v2: Following suggestions from Michael and Mathieu switch to using virtio16/32 > > types and conversion functions. > > > > drivers/rpmsg/virtio_rpmsg_bus.c | 63 +++++++++++++++++--------------- > > 1 file changed, 34 insertions(+), 29 deletions(-) > > > > diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c b/drivers/rpmsg/virtio_rpmsg_bus.c > > index 07d4f3374098..9006fc7f73d0 100644 > > --- a/drivers/rpmsg/virtio_rpmsg_bus.c > > +++ b/drivers/rpmsg/virtio_rpmsg_bus.c > > @@ -23,6 +23,7 @@ > > #include <linux/slab.h> > > #include <linux/sched.h> > > #include <linux/virtio.h> > > +#include <linux/virtio_byteorder.h> > > #include <linux/virtio_ids.h> > > #include <linux/virtio_config.h> > > #include <linux/wait.h> > > @@ -84,11 +85,11 @@ struct virtproc_info { > > * Every message sent(/received) on the rpmsg bus begins with this header. > > */ > > struct rpmsg_hdr { > > - u32 src; > > - u32 dst; > > - u32 reserved; > > - u16 len; > > - u16 flags; > > + __virtio32 src; > > + __virtio32 dst; > > + __virtio32 reserved; > > + __virtio16 len; > > + __virtio16 flags; > > u8 data[]; > > } __packed; > > > > @@ -106,8 +107,8 @@ struct rpmsg_hdr { > > */ > > struct rpmsg_ns_msg { > > char name[RPMSG_NAME_SIZE]; > > - u32 addr; > > - u32 flags; > > + __virtio32 addr; > > + __virtio32 flags; > > } __packed; > > > > /** > > @@ -335,8 +336,8 @@ static int virtio_rpmsg_announce_create(struct rpmsg_device *rpdev) > > struct rpmsg_ns_msg nsm; > > > > strncpy(nsm.name, rpdev->id.name, RPMSG_NAME_SIZE); > > - nsm.addr = rpdev->ept->addr; > > - nsm.flags = RPMSG_NS_CREATE; > > + nsm.addr = cpu_to_virtio32(vrp->vdev, rpdev->ept->addr); > > + nsm.flags = cpu_to_virtio32(vrp->vdev, RPMSG_NS_CREATE); > > > > err = rpmsg_sendto(rpdev->ept, &nsm, sizeof(nsm), RPMSG_NS_ADDR); > > if (err) > > @@ -359,8 +360,8 @@ static int virtio_rpmsg_announce_destroy(struct rpmsg_device *rpdev) > > struct rpmsg_ns_msg nsm; > > > > strncpy(nsm.name, rpdev->id.name, RPMSG_NAME_SIZE); > > - nsm.addr = rpdev->ept->addr; > > - nsm.flags = RPMSG_NS_DESTROY; > > + nsm.addr = cpu_to_virtio32(vrp->vdev, rpdev->ept->addr); > > + nsm.flags = cpu_to_virtio32(vrp->vdev, RPMSG_NS_DESTROY); > > > > err = rpmsg_sendto(rpdev->ept, &nsm, sizeof(nsm), RPMSG_NS_ADDR); > > if (err) > > @@ -612,18 +613,18 @@ static int rpmsg_send_offchannel_raw(struct rpmsg_device *rpdev, > > } > > } > > > > - msg->len = len; > > + msg->len = cpu_to_virtio16(vrp->vdev, len); > > msg->flags = 0; > > - msg->src = src; > > - msg->dst = dst; > > + msg->src = cpu_to_virtio32(vrp->vdev, src); > > + msg->dst = cpu_to_virtio32(vrp->vdev, dst); > > msg->reserved = 0; > > memcpy(msg->data, data, len); > > > > dev_dbg(dev, "TX From 0x%x, To 0x%x, Len %d, Flags %d, Reserved %d\n", > > - msg->src, msg->dst, msg->len, msg->flags, msg->reserved); > > + src, dst, len, msg->flags, msg->reserved); > > #if defined(CONFIG_DYNAMIC_DEBUG) > > dynamic_hex_dump("rpmsg_virtio TX: ", DUMP_PREFIX_NONE, 16, 1, > > - msg, sizeof(*msg) + msg->len, true); > > + msg, sizeof(*msg) + len, true); > > #endif > > > > rpmsg_sg_init(&sg, msg, sizeof(*msg) + len); > > @@ -704,13 +705,17 @@ static int rpmsg_recv_single(struct virtproc_info *vrp, struct device *dev, > > { > > struct rpmsg_endpoint *ept; > > struct scatterlist sg; > > + unsigned int msg_len = virtio16_to_cpu(vrp->vdev, msg->len); > > int err; > > > > dev_dbg(dev, "From: 0x%x, To: 0x%x, Len: %d, Flags: %d, Reserved: %d\n", > > - msg->src, msg->dst, msg->len, msg->flags, msg->reserved); > > + virtio32_to_cpu(vrp->vdev, msg->src), > > + virtio32_to_cpu(vrp->vdev, msg->dst), msg_len, > > + virtio16_to_cpu(vrp->vdev, msg->flags), > > + virtio32_to_cpu(vrp->vdev, msg->reserved)); > > #if defined(CONFIG_DYNAMIC_DEBUG) > > dynamic_hex_dump("rpmsg_virtio RX: ", DUMP_PREFIX_NONE, 16, 1, > > - msg, sizeof(*msg) + msg->len, true); > > + msg, sizeof(*msg) + msg_len, true); > > #endif > > > > /* > > @@ -718,15 +723,15 @@ static int rpmsg_recv_single(struct virtproc_info *vrp, struct device *dev, > > * the reported payload length. > > */ > > if (len > vrp->buf_size || > > - msg->len > (len - sizeof(struct rpmsg_hdr))) { > > - dev_warn(dev, "inbound msg too big: (%d, %d)\n", len, msg->len); > > + msg_len > (len - sizeof(struct rpmsg_hdr))) { > > + dev_warn(dev, "inbound msg too big: (%d, %d)\n", len, msg_len); > > return -EINVAL; > > } > > > > /* use the dst addr to fetch the callback of the appropriate user */ > > mutex_lock(&vrp->endpoints_lock); > > > > - ept = idr_find(&vrp->endpoints, msg->dst); > > + ept = idr_find(&vrp->endpoints, virtio32_to_cpu(vrp->vdev, msg->dst)); > > > > /* let's make sure no one deallocates ept while we use it */ > > if (ept) > > @@ -739,8 +744,8 @@ static int rpmsg_recv_single(struct virtproc_info *vrp, struct device *dev, > > mutex_lock(&ept->cb_lock); > > > > if (ept->cb) > > - ept->cb(ept->rpdev, msg->data, msg->len, ept->priv, > > - msg->src); > > + ept->cb(ept->rpdev, msg->data, msg_len, ept->priv, > > + virtio32_to_cpu(vrp->vdev, msg->src)); > > > > mutex_unlock(&ept->cb_lock); > > > > @@ -846,15 +851,15 @@ static int rpmsg_ns_cb(struct rpmsg_device *rpdev, void *data, int len, > > /* don't trust the remote processor for null terminating the name */ > > msg->name[RPMSG_NAME_SIZE - 1] = '\0'; > > > > - dev_info(dev, "%sing channel %s addr 0x%x\n", > > - msg->flags & RPMSG_NS_DESTROY ? "destroy" : "creat", > > - msg->name, msg->addr); > > - > > strncpy(chinfo.name, msg->name, sizeof(chinfo.name)); > > chinfo.src = RPMSG_ADDR_ANY; > > - chinfo.dst = msg->addr; > > + chinfo.dst = virtio32_to_cpu(vrp->vdev, msg->addr); > > + > > + dev_info(dev, "%sing channel %s addr 0x%x\n", > > + virtio32_to_cpu(vrp->vdev, msg->flags) & RPMSG_NS_DESTROY ? > > + "destroy" : "creat", msg->name, chinfo.dst); > > > > - if (msg->flags & RPMSG_NS_DESTROY) { > > + if (virtio32_to_cpu(vrp->vdev, msg->flags) & RPMSG_NS_DESTROY) { > > ret = rpmsg_unregister_device(&vrp->vdev->dev, &chinfo); > > if (ret) > > dev_err(dev, "rpmsg_destroy_channel failed: %d\n", ret); > > -- > > 2.27.0 > >
