From: Jason Wang <jasowang@redhat.com>
To: mst@redhat.com, jasowang@redhat.com
Cc: virtualization@lists.linux-foundation.org,
linux-kernel@vger.kernel.org, f.hetzelt@tu-berlin.de,
david.kaplan@amd.com, konrad.wilk@oracle.com,
Amit Shah <amit@kernel.org>
Subject: [PATCH 3/9] virtio-console: switch to use .validate()
Date: Mon, 13 Sep 2021 13:53:47 +0800 [thread overview]
Message-ID: <20210913055353.35219-4-jasowang@redhat.com> (raw)
In-Reply-To: <20210913055353.35219-1-jasowang@redhat.com>
This patch switches to use validate() to filter out the features that
is not supported by the rproc.
Cc: Amit Shah <amit@kernel.org>
Signed-off-by: Jason Wang <jasowang@redhat.com>
---
drivers/char/virtio_console.c | 41 ++++++++++++++++++++++-------------
1 file changed, 26 insertions(+), 15 deletions(-)
diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c
index 7eaf303a7a86..daeed31df622 100644
--- a/drivers/char/virtio_console.c
+++ b/drivers/char/virtio_console.c
@@ -1172,9 +1172,7 @@ static void resize_console(struct port *port)
vdev = port->portdev->vdev;
- /* Don't test F_SIZE at all if we're rproc: not a valid feature! */
- if (!is_rproc_serial(vdev) &&
- virtio_has_feature(vdev, VIRTIO_CONSOLE_F_SIZE))
+ if (virtio_has_feature(vdev, VIRTIO_CONSOLE_F_SIZE))
hvc_resize(port->cons.hvc, port->cons.ws);
}
@@ -1981,6 +1979,29 @@ static void virtcons_remove(struct virtio_device *vdev)
kfree(portdev);
}
+static int virtcons_validate(struct virtio_device *vdev)
+{
+ if (is_rproc_serial(vdev)) {
+ /* Don't test F_SIZE at all if we're rproc: not a
+ * valid feature! */
+ __virtio_clear_bit(vdev, VIRTIO_CONSOLE_F_SIZE);
+ /* Don't test MULTIPORT at all if we're rproc: not a
+ * valid feature! */
+ __virtio_clear_bit(vdev, VIRTIO_CONSOLE_F_MULTIPORT);
+ }
+
+ /* We only need a config space if features are offered */
+ if (!vdev->config->get &&
+ (virtio_has_feature(vdev, VIRTIO_CONSOLE_F_SIZE)
+ || virtio_has_feature(vdev, VIRTIO_CONSOLE_F_MULTIPORT))) {
+ dev_err(&vdev->dev, "%s failure: config access disabled\n",
+ __func__);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
/*
* Once we're further in boot, we get probed like any other virtio
* device.
@@ -1996,15 +2017,6 @@ static int virtcons_probe(struct virtio_device *vdev)
bool multiport;
bool early = early_put_chars != NULL;
- /* We only need a config space if features are offered */
- if (!vdev->config->get &&
- (virtio_has_feature(vdev, VIRTIO_CONSOLE_F_SIZE)
- || virtio_has_feature(vdev, VIRTIO_CONSOLE_F_MULTIPORT))) {
- dev_err(&vdev->dev, "%s failure: config access disabled\n",
- __func__);
- return -EINVAL;
- }
-
/* Ensure to read early_put_chars now */
barrier();
@@ -2031,9 +2043,7 @@ static int virtcons_probe(struct virtio_device *vdev)
multiport = false;
portdev->max_nr_ports = 1;
- /* Don't test MULTIPORT at all if we're rproc: not a valid feature! */
- if (!is_rproc_serial(vdev) &&
- virtio_cread_feature(vdev, VIRTIO_CONSOLE_F_MULTIPORT,
+ if (virtio_cread_feature(vdev, VIRTIO_CONSOLE_F_MULTIPORT,
struct virtio_console_config, max_nr_ports,
&portdev->max_nr_ports) == 0) {
multiport = true;
@@ -2210,6 +2220,7 @@ static struct virtio_driver virtio_console = {
.driver.name = KBUILD_MODNAME,
.driver.owner = THIS_MODULE,
.id_table = id_table,
+ .validate = virtcons_validate,
.probe = virtcons_probe,
.remove = virtcons_remove,
.config_changed = config_intr,
--
2.25.1
next prev parent reply other threads:[~2021-09-13 5:54 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-13 5:53 [PATCH 0/9] More virtio hardening Jason Wang
2021-09-13 5:53 ` [PATCH 1/9] virtio-blk: validate num_queues during probe Jason Wang
2021-09-13 7:48 ` Stefano Garzarella
2021-09-14 2:29 ` Jason Wang
2021-09-13 12:05 ` Stefan Hajnoczi
2021-09-13 5:53 ` [PATCH 2/9] virtio: add doc for validate() method Jason Wang
2021-09-13 5:53 ` Jason Wang [this message]
2021-09-13 5:53 ` [PATCH 4/9] virtio_console: validate max_nr_ports before trying to use it Jason Wang
2021-09-13 5:53 ` [PATCH 5/9] virtio_config: introduce a new ready method Jason Wang
2021-09-13 5:53 ` [PATCH 6/9] virtio_pci: harden MSI-X interrupts Jason Wang
2021-09-13 6:03 ` Michael S. Tsirkin
2021-09-13 6:08 ` Jason Wang
2021-09-13 6:28 ` Michael S. Tsirkin
2021-09-13 6:34 ` Jason Wang
2021-09-13 6:37 ` Michael S. Tsirkin
2021-09-13 6:43 ` Jason Wang
2021-09-13 7:01 ` Michael S. Tsirkin
2021-09-13 7:15 ` Jason Wang
2021-09-13 6:50 ` Michael S. Tsirkin
2021-09-13 7:07 ` Jason Wang
2021-09-13 19:38 ` Thomas Gleixner
2021-09-13 20:54 ` Michael S. Tsirkin
2021-09-13 22:31 ` Thomas Gleixner
2021-09-14 2:20 ` Jason Wang
2021-09-14 8:29 ` Thomas Gleixner
2021-09-13 5:53 ` [PATCH 7/9] virtio-pci: harden INTX interrupts Jason Wang
2021-09-13 6:33 ` Michael S. Tsirkin
2021-09-13 6:36 ` Jason Wang
2021-09-13 6:41 ` Michael S. Tsirkin
2021-09-13 6:45 ` Jason Wang
2021-09-13 7:02 ` Michael S. Tsirkin
2021-09-13 7:17 ` Jason Wang
2021-09-13 21:36 ` Thomas Gleixner
2021-09-13 22:01 ` Michael S. Tsirkin
2021-09-13 22:20 ` Thomas Gleixner
2021-09-14 2:50 ` Jason Wang
2021-09-14 9:34 ` Boqun Feng
2021-09-14 11:03 ` Peter Zijlstra
2021-09-14 11:09 ` Thomas Gleixner
2021-09-13 5:53 ` [PATCH 8/9] virtio_ring: fix typos in vring_desc_extra Jason Wang
2021-09-13 5:53 ` [PATCH 9/9] virtio_ring: validate used buffer length Jason Wang
2021-09-13 6:36 ` Michael S. Tsirkin
2021-09-13 6:40 ` Jason Wang
2021-09-13 6:57 ` Michael S. Tsirkin
2021-09-13 7:13 ` Jason Wang
2021-10-05 7:42 ` [PATCH 0/9] More virtio hardening Michael S. Tsirkin
2021-10-11 7:36 ` Jason Wang
2021-10-11 12:36 ` Michael S. Tsirkin
2021-10-12 2:43 ` Jason Wang
2021-10-12 5:44 ` Michael S. Tsirkin
2021-10-12 6:11 ` Jason Wang
2021-10-12 6:35 ` Michael S. Tsirkin
2021-10-12 6:43 ` Jason Wang
2021-10-12 7:03 ` Michael S. Tsirkin
2021-10-12 8:46 ` Jason Wang
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