linux-kernel - Re: [PATCH v3 3/4] nitro_enclaves: Add KUnit tests setup for the misc device functionality

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Message-ID: <58693f94-f110-a1cf-d464-df2107f56529@amazon.com>
Date:   Fri, 15 Oct 2021 16:58:25 +0300
From:   "Paraschiv, Andra-Irina" <andraprs@...zon.com>
To:     "Longpeng(Mike)" <longpeng2@...wei.com>
CC:     <arei.gonglei@...wei.com>, <gregkh@...uxfoundation.org>,
        <kamal@...onical.com>, <pbonzini@...hat.com>,
        <sgarzare@...hat.com>, <stefanha@...hat.com>,
        <vkuznets@...hat.com>, <linux-kernel@...r.kernel.org>,
        <ne-devel-upstream@...zon.com>, <lexnv@...zon.com>,
        <alcioa@...zon.com>
Subject: Re: [PATCH v3 3/4] nitro_enclaves: Add KUnit tests setup for the misc
 device functionality



On 09/10/2021 04:32, Longpeng(Mike) wrote:
> From: Longpeng <longpeng2@...wei.com>
> 
> Add the initial setup for the KUnit tests that will target the Nitro
> Enclaves misc device functionality.
> 
> Signed-off-by: Longpeng <longpeng2@...wei.com>
> ---
> Changes v2 -> v3:
>    - update the commit title and commit message.  [Andra]
>    - use "misc_dev"/"misc device"/"MISC_DEV" to be more specific.  [Andra]
> ---
>   drivers/virt/nitro_enclaves/Kconfig            |  9 +++++++++
>   drivers/virt/nitro_enclaves/ne_misc_dev.c      | 27 ++++++++++++++++++++++++++
>   drivers/virt/nitro_enclaves/ne_misc_dev_test.c | 17 ++++++++++++++++
>   3 files changed, 53 insertions(+)
>   create mode 100644 drivers/virt/nitro_enclaves/ne_misc_dev_test.c
> 
> diff --git a/drivers/virt/nitro_enclaves/Kconfig b/drivers/virt/nitro_enclaves/Kconfig
> index 8c9387a..90802b1 100644
> --- a/drivers/virt/nitro_enclaves/Kconfig
> +++ b/drivers/virt/nitro_enclaves/Kconfig
> @@ -18,3 +18,12 @@ config NITRO_ENCLAVES
>   
>   	  To compile this driver as a module, choose M here.
>   	  The module will be called nitro_enclaves.
> +
> +config NITRO_ENCLAVES_MISC_DEV_TEST
> +	bool "Tests for the misc device functionality of the Nitro enclaves"

Nitro enclaves => Nitro Enclaves

> +	depends on NITRO_ENCLAVES && KUNIT=y
> +	help
> +	  Enable KUnit tests for the misc device functionality of the Nitro
> +	  Enclaves. Select this option only if you will boot the kernel for
> +	  the purpose of running unit tests (e.g. under UML or qemu). If
> +	  unsure, say N.
> diff --git a/drivers/virt/nitro_enclaves/ne_misc_dev.c b/drivers/virt/nitro_enclaves/ne_misc_dev.c
> index a8fa56b..f895fc3 100644
> --- a/drivers/virt/nitro_enclaves/ne_misc_dev.c
> +++ b/drivers/virt/nitro_enclaves/ne_misc_dev.c
> @@ -1756,8 +1756,33 @@ static long ne_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
>   	return 0;
>   }
>   
> +#if defined(CONFIG_NITRO_ENCLAVES_MISC_DEV_TEST)
> +#include "ne_misc_dev_test.c"
> +
> +static inline int ne_misc_dev_test_init(void)
> +{
> +	return __kunit_test_suites_init(ne_misc_dev_test_suites);
> +}
> +
> +static inline void ne_misc_dev_test_exit(void)
> +{
> +	__kunit_test_suites_exit(ne_misc_dev_test_suites);
> +}
> +#else
> +static inline int ne_misc_dev_test_init(void)
> +{
> +	return 0;
> +}
> +
> +static inline void ne_misc_dev_test_exit(void)
> +{
> +}
> +#endif
> +
>   static int __init ne_init(void)
>   {
> +	ne_misc_dev_test_init();

Let's have:

int rc = 0;

and then check the return code of "ne_misc_dev_test_init()".

> +
>   	mutex_init(&ne_cpu_pool.mutex);
>   
>   	return pci_register_driver(&ne_pci_driver);
> @@ -1768,6 +1793,8 @@ static void __exit ne_exit(void)
>   	pci_unregister_driver(&ne_pci_driver);
>   
>   	ne_teardown_cpu_pool();
> +
> +	ne_misc_dev_test_exit();
>   }
>   
>   module_init(ne_init);
> diff --git a/drivers/virt/nitro_enclaves/ne_misc_dev_test.c b/drivers/virt/nitro_enclaves/ne_misc_dev_test.c
> new file mode 100644
> index 0000000..bcb755e
> --- /dev/null
> +++ b/drivers/virt/nitro_enclaves/ne_misc_dev_test.c
> @@ -0,0 +1,17 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later

Let's keep the same marker as in the other files of the NE kernel driver 
codebase.

// SPDX-License-Identifier: GPL-2.0

Thanks,
Andra

> +
> +#include <kunit/test.h>
> +
> +static struct kunit_case ne_misc_dev_test_cases[] = {
> +	{}
> +};
> +
> +static struct kunit_suite ne_misc_dev_test_suite = {
> +	.name = "ne_misc_dev_test",
> +	.test_cases = ne_misc_dev_test_cases,
> +};
> +
> +static struct kunit_suite *ne_misc_dev_test_suites[] = {
> +	&ne_misc_dev_test_suite,
> +	NULL
> +};
> 



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