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
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
