linux-kernel - Re: [PATCH v2 3/4] nitro_enclaves: add test framework for the misc functionality

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Message-ID: <ccb2b514-6fb7-440a-b498-037f0163e0c3@amazon.com>
Date:   Sun, 3 Oct 2021 16:49:54 +0300
From:   "Paraschiv, Andra-Irina" <andraprs@...zon.com>
To:     "Longpeng(Mike)" <longpeng2@...wei.com>
CC:     <linux-kernel@...r.kernel.org>, <arei.gonglei@...wei.com>,
        <gregkh@...uxfoundation.org>, <kamal@...onical.com>,
        <pbonzini@...hat.com>, <sgarzare@...hat.com>,
        <stefanha@...hat.com>, <vkuznets@...hat.com>,
        <ne-devel-upstream@...zon.com>, <lexnv@...zon.com>,
        <alcioa@...zon.com>
Subject: Re: [PATCH v2 3/4] nitro_enclaves: add test framework for the misc
 functionality



On 21/09/2021 18:10, Longpeng(Mike) wrote:
> Add test framework for the misc functionality.

Let's add more specifics here.

nitro_enclaves: Add KUnit tests setup for the misc device functionality

Add the initial setup for the KUnit tests that will target the Nitro 
Enclaves misc device functionality.

> 
> Signed-off-by: Longpeng(Mike) <longpeng2@...wei.com>
> ---
>   drivers/virt/nitro_enclaves/Kconfig        |  8 ++++++++
>   drivers/virt/nitro_enclaves/ne_misc_dev.c  | 27 +++++++++++++++++++++++++++
>   drivers/virt/nitro_enclaves/ne_misc_test.c | 17 +++++++++++++++++
>   3 files changed, 52 insertions(+)
>   create mode 100644 drivers/virt/nitro_enclaves/ne_misc_test.c

Please modify in all places where necessary to mention Nitro Enclaves 
"misc device", instead of just "misc", to be more specific.

For example, here can be "ne_misc_dev_test.c".

> 
> diff --git a/drivers/virt/nitro_enclaves/Kconfig b/drivers/virt/nitro_enclaves/Kconfig
> index 8c9387a..24c54da 100644
> --- a/drivers/virt/nitro_enclaves/Kconfig
> +++ b/drivers/virt/nitro_enclaves/Kconfig
> @@ -18,3 +18,11 @@ config NITRO_ENCLAVES
>   
>   	  To compile this driver as a module, choose M here.
>   	  The module will be called nitro_enclaves.
> +
> +config NITRO_ENCLAVES_MISC_TEST

NITRO_ENCLAVES_MISC_DEV_TEST

> +	bool "Tests for the misc functionality of Nitro enclaves"

misc device functionality of the Nitro Enclaves

> +	depends on NITRO_ENCLAVES && KUNIT=y
> +	help
> +	  Enable KUnit tests for the misc functionality of Nitro Enclaves. Select

misc device functionality of the Nitro Enclaves

> +	  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 d551b88..0131e1b 100644
> --- a/drivers/virt/nitro_enclaves/ne_misc_dev.c
> +++ b/drivers/virt/nitro_enclaves/ne_misc_dev.c
> @@ -1735,8 +1735,33 @@ static long ne_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
>   	return 0;
>   }
>   
> +#if defined(CONFIG_NITRO_ENCLAVES_MISC_TEST)
> +#include "ne_misc_test.c"
> +
> +static inline int ne_misc_test_init(void)
> +{
> +	return __kunit_test_suites_init(ne_misc_test_suites);
> +}
> +
> +static inline void ne_misc_test_exit(void)
> +{
> +	__kunit_test_suites_exit(ne_misc_test_suites);
> +}
> +#else
> +static inline int ne_misc_test_init(void)
> +{
> +	return 0;
> +}
> +
> +static inline void ne_misc_test_exit(void)
> +{
> +}
> +#endif

s/misc/misc_dev/g

Why are these needed? Can't the test suite be setup using 
"kunit_test_suite" as in the KUnit documentation example [1]?

Wouldn't be necessary to conditionally compile the ne_misc_dev_test, 
based on the kernel config above?

[1] 
https://www.kernel.org/doc/html/latest/dev-tools/kunit/start.html#writing-your-first-test

> +
>   static int __init ne_init(void)
>   {
> +	ne_misc_test_init();
> +
>   	mutex_init(&ne_cpu_pool.mutex);
>   
>   	return pci_register_driver(&ne_pci_driver);
> @@ -1747,6 +1772,8 @@ static void __exit ne_exit(void)
>   	pci_unregister_driver(&ne_pci_driver);
>   
>   	ne_teardown_cpu_pool();
> +
> +	ne_misc_test_exit();
>   }
>   
>   module_init(ne_init);
> diff --git a/drivers/virt/nitro_enclaves/ne_misc_test.c b/drivers/virt/nitro_enclaves/ne_misc_test.c
> new file mode 100644
> index 0000000..3426c35
> --- /dev/null
> +++ b/drivers/virt/nitro_enclaves/ne_misc_test.c
> @@ -0,0 +1,17 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +
> +#include <kunit/test.h>
> +
> +static struct kunit_case ne_misc_test_cases[] = {
> +	{}
> +};
> +
> +static struct kunit_suite ne_misc_test_suite = {
> +	.name = "ne_misc_test",
> +	.test_cases = ne_misc_test_cases,
> +};
> +
> +static struct kunit_suite *ne_misc_test_suites[] = {
> +	&ne_misc_test_suite,
> +	NULL
> +};
> 

Can replace "ne_misc" with "ne_misc_dev".

Thanks,
Andra



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