Re: [PATCH v6 0/5] linux-custom: Split up binaries from kernel headers to kbuild package

["Koch, Stefan" <stefan-koch@siemens.com>]

On Tue, 2024-04-23 at 22:22 +0300, Uladzimir Bely wrote:
> On Wed, 2024-02-14 at 11:10 +0100, 'Stefan Koch' via isar-users
> wrote:
> > Hi
> > 
> > This updated v6 patchset implement suggestions from reviewed v4
> > patchset.
> > It's now a set of five patches:
> > - linux-custom: Set PROVIDES variable using bitbake overrides
> > - linux-custom: Split up binaries from kernel headers to kbuild
> > package
> > - linux-custom: Provide target and host specific kernel kbuild
> > packages
> > - linux-module: Support emulated module build with cross-compiled
> > kernel
> > - docs: Update custom_kernel docs for split up of kernel scripts
> > and
> > tools
> > 
> > The first commit sets the PROVIDES variable using
> > bitbake overrides instead of python code.
> > 
> > Swap out the binaries from the kernel headers
> > into kernel kbuild package is the main use-case
> > introduced by the second commit
> > "Split up binaries from kernel headers to kbuild package"
> > 
> > The third commit "Provide target and host specific kernel kbuild
> > packages"
> > introduces that the binaries could be swapped out into host and
> > target
> > specific kernel kbuild packages.
> > 
> > Support of emulated module build with a cross-compiled kernel build
> > is introduced by the fourth commit.
> > 
> > These are the main development goals:
> > 
> > 1. Solve already known isar custom kernel
> > limitations from doc/custom_kernel.inc
> > - kernel headers package does not support both native
> >   and cross compilation of kernel modules when cross built
> > 
> > 2. Honor recommendations for future from doc/custom_kernel.inc
> > - Generate kernel headers packages for both host and target
> >   when using cross build
> > 
> > 3. Add extensions known from debian kernel packages structure
> > - Generate a kernel headers package without binaries
> > - Create specific kernel kbuild packages that
> >   will ship the "scripts" and "tools" binaries
> > - Use symlinks to point to the "scripts" and "tools" binaries
> > 
> > 4. Be user friendly
> > - Avoid redundant configuration of kernel source definitions with
> > user
> >   actions to enable kbuild package generation
> > - Use already known way to include linux-custom.inc in just one
> >   own bitbake recipe that provides the kernel source definitions
> > - Keep known user behavior for existing build configurations:
> >   just update isar, and use the new linux-kbuild bitbake target
> >   to create the kbuild target package when cross building
> > 
> > Best regards
> > 
> > Stefan
> > 
> > Stefan Koch (5):
> >   linux-custom: Set PROVIDES variable using bitbake overrides
> >   linux-custom: Split up binaries from kernel headers to kbuild
> > package
> >   linux-custom: Provide target and host specific kernel kbuild
> > packages
> >   linux-module: Support emulated module build with cross-compiled
> > kernel
> >   docs: Update custom_kernel docs for split up of kernel scripts
> > and
> >     tools
> > 
> >  RECIPE-API-CHANGELOG.md                       | 31 ++++++++
> >  doc/custom_kernel.md                          | 18 +++--
> >  meta/recipes-kernel/linux-module/module.inc   |  3 +-
> >  .../linux/classes/kbuildtarget.bbclass        |  8 ++
> >  .../linux/files/debian/control.tmpl           | 15 +++-
> >  .../linux/files/debian/isar/build.tmpl        | 13 +++-
> >  .../linux/files/debian/isar/common.tmpl       | 11 +++
> >  .../linux/files/debian/isar/install.tmpl      | 75 ++++++++++++++-
> > --
> > --
> >  meta/recipes-kernel/linux/linux-custom.inc    | 65 +++++++++++++--
> > -
> >  meta/recipes-kernel/linux/linux-distro.bb     |  1 +
> >  10 files changed, 199 insertions(+), 41 deletions(-)
> >  create mode 100644 meta/recipes-
> > kernel/linux/classes/kbuildtarget.bbclass
> > 
> > -- 
> > 2.39.2
> > 
> 
> Applied to next, excluding patch 4 (causing build failures on amd64
> arch), as discussed on maillist.
Thanks. I'll send fixed patch 4 now...
> 
> Thanks.

-- 
Stefan Koch
Siemens AG
www.siemens.com