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Date: Thu, 7 Oct 2021 02:05:09 +0000
From: "Longpeng (Mike, Cloud Infrastructure Service Product Dept.)"
<longpeng2@...wei.com>
To: "Paraschiv, Andra-Irina" <andraprs@...zon.com>
CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"Gonglei (Arei)" <arei.gonglei@...wei.com>,
"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
"kamal@...onical.com" <kamal@...onical.com>,
"pbonzini@...hat.com" <pbonzini@...hat.com>,
"sgarzare@...hat.com" <sgarzare@...hat.com>,
"stefanha@...hat.com" <stefanha@...hat.com>,
"vkuznets@...hat.com" <vkuznets@...hat.com>,
"ne-devel-upstream@...zon.com" <ne-devel-upstream@...zon.com>,
"lexnv@...zon.com" <lexnv@...zon.com>,
"alcioa@...zon.com" <alcioa@...zon.com>
Subject: RE: [PATCH v2 3/4] nitro_enclaves: add test framework for the misc
functionality
> -----Original Message-----
> From: Paraschiv, Andra-Irina [mailto:andraprs@...zon.com]
> Sent: Sunday, October 3, 2021 9:50 PM
> To: Longpeng (Mike, Cloud Infrastructure Service Product Dept.)
> <longpeng2@...wei.com>
> Cc: linux-kernel@...r.kernel.org; Gonglei (Arei) <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.
>
OK, thanks.
> >
> > 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".
>
OK.
> >
> > 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
>
OK, thanks.
> > + 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-y
> our-first-test
>
Both of these two ways are supported in kernel, for example [2].
There are two reasons why I choose this way:
1. The functions (to test) in "ne_misc_dev.c" are 'static', we cannot invoke
them in "ne_misc_dev_test.c".
2. kunit_test_suite defines a module init function internal, and "ne_misc_dev.c"
also defines one, so they cannot be compiled into one module.
[2]
https://elixir.bootlin.com/linux/v5.15-rc4/source/drivers/mmc/host/sdhci-of-aspeed.c#L612
> > +
> > 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
>
>
>
> Amazon Development Center (Romania) S.R.L. registered office: 27A Sf. Lazar
> Street, UBC5, floor 2, Iasi, Iasi County, 700045, Romania. Registered in Romania.
> Registration number J22/2621/2005.
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