On Wed, May 27, 2020 at 9:22 PM shuah <shuah@xxxxxxxxxx> wrote:
>
> On 5/27/20 1:30 AM, Yauheni Kaliuta wrote:
> > Hi, shuah!
> >
> >>>>>> On Tue, 26 May 2020 11:13:29 -0600, shuah wrote:
> >
> > > On 5/25/20 7:55 AM, Yauheni Kaliuta wrote:
> > >> Hi!
> > >>
> > >> I'm wondering how out of tree check is supposed to work for make
> > >> O=dir run_tests from selftests (or make -C ...) directory?
> > >>
> > >> (both with 051f278e9d81 ("kbuild: replace KBUILD_SRCTREE with
> > >> boolean building_out_of_srctree") and without)
> > >>
> > >> make M= ... does not work with run_tests.
> > >>
> >
> > > Kselftests run_tests target isn't intended for building and
> > > running tests OOT.
> >
> > But there is code there trying to handle it. All that OUTPUT
> > related things must be removed if it's broken, right? Can I post
> > a patch?
> >
> > > Also make M= doesn't make sense for them.
> >
> > Well, M=... at least includes all the makefiles.
> >
> > > There is no support to build OOT at the moment. I would like
> > > to get a better understanding of your use-case. Can you
> > > elaborate?
> >
> > I care about make install actually. But fixing it I had to deal
> > with OUTPUT. Looking a proper for that I found that it's a bit
> > broken.
> >
> >
>
> kselftest supports install of all all tests and a sub-set of tests
> both native and cross-builds.
>
> Simple case:
> If you want to build all tests and install to $HOME/install/
> This has a dependency on kernel being built in the source repo
> you are running the following install command from:
>
> In Kernel source root dir run:
> make kselftest-install O=$HOME/install
>
> You will find installed tests with run script to run them all
> under $HOME/install/kselftest/kselftest_install/
>
> If you run run_kselftest.sh under kselftest_install, it will run
> all the tests.
>
> You can use TARGETS var to build a sub-set of tests.
>
> In Kernel source root dir run:
> make kselftest-install TARGETS=bpf O=$HOME/install
>
Have you tried it with the recent bpf tree? ;)
(BTW, it is a bit misleading, it's building there, not installing).
>
> Native or cross-build case when you are doing relocatable
> builds.
>
> arm64 cross-build:
> # first do a relocatable kernel build in $HOME/arm64_build
> make O=$HOME/arm64_build/ ARCH=arm64 HOSTCC=gcc \
> CROSS_COMPILE=aarch64-linux-gnu- defconfig
>
> make O=$HOME/arm64_build/ ARCH=arm64 HOSTCC=gcc \
> CROSS_COMPILE=aarch64-linux-gnu- all
>
> # install selftests (all)
> make kselftest-install O=$HOME/arm64_build ARCH=arm64 \
> HOSTCC=gcc CROSS_COMPILE=aarch64-linux-gnu-
>
> # install selftests (just bpf)
> make kselftest-install TARGETS=bpf O=$HOME/arm64_build ARCH=arm64 \
> HOSTCC=gcc CROSS_COMPILE=aarch64-linux-gnu-
>
>
> You will find kselftest installed under
>
> $HOME/arm64_build/kselftest/kselftest_install
>
> You can use the same procedure for native builds as well
> assuming your native env. is x86_64
>
> # first do a relocatable kernel build in $HOME/x86_64_build
>
> make kselftest-install TARGETS=bpf O=$HOME/x86_64_build
>
> You will find kselftest installed under
>
> $HOME/x86_64_build/kselftest/kselftest_install
>
> It is on todo to update the documentation. :(
>
> thanks,
> -- Shuah
>
--
WBR, Yauheni
