mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-22 03:03:05 +00:00
53 lines
1.4 KiB
C
53 lines
1.4 KiB
C
|
// SPDX-License-Identifier: GPL-2.0+
|
||
|
|
/*
|
||
|
|
* Copyright (c) 2022 Google, Inc.
|
||
|
|
* Written by Andrew Scull <ascull@google.com>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <common.h>
|
||
|
|
#include <dm.h>
|
||
|
|
#include <virtio_types.h>
|
||
|
|
#include <virtio.h>
|
||
|
|
#include <virtio_ring.h>
|
||
|
|
#include <dm/device-internal.h>
|
||
|
|
#include <dm/test.h>
|
||
|
|
#include <rng.h>
|
||
|
|
#include <test/test.h>
|
||
|
|
#include <test/ut.h>
|
||
|
|
|
||
|
|
/* This is a brittle means of getting access to the virtqueue */
|
||
|
|
struct virtio_rng_priv {
|
||
|
|
struct virtqueue *rng_vq;
|
||
|
|
};
|
||
|
|
|
||
|
|
/* Test the virtio-rng driver validates the used size */
|
||
|
|
static int dm_test_virtio_rng_check_len(struct unit_test_state *uts)
|
||
|
|
{
|
||
|
|
struct udevice *bus, *dev;
|
||
|
|
struct virtio_rng_priv *priv;
|
||
|
|
u8 buffer[16];
|
||
|
|
|
||
|
|
/* check probe success */
|
||
|
|
ut_assertok(uclass_first_device(UCLASS_VIRTIO, &bus));
|
||
|
|
ut_assertnonnull(bus);
|
||
|
|
|
||
|
|
/* check the child virtio-rng device is bound */
|
||
|
|
ut_assertok(device_find_first_child(bus, &dev));
|
||
|
|
ut_assertnonnull(dev);
|
||
|
|
|
||
|
|
/* probe the virtio-rng driver */
|
||
|
|
ut_assertok(device_probe(dev));
|
||
|
|
|
||
|
|
/* simulate the device returning the buffer with too much data */
|
||
|
|
priv = dev_get_priv(dev);
|
||
|
|
priv->rng_vq->vring.used->idx = 1;
|
||
|
|
priv->rng_vq->vring.used->ring[0].id = 0;
|
||
|
|
priv->rng_vq->vring.used->ring[0].len = U32_MAX;
|
||
|
|
|
||
|
|
/* check the driver gracefully handles the error */
|
||
|
|
ut_asserteq(-EIO, dm_rng_read(dev, buffer, sizeof(buffer)));
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
DM_TEST(dm_test_virtio_rng_check_len, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);
|