diff mbox series

[1/1] kernel-module-split: fix conf file generation when KERNEL_SPLIT_MODULES=0

Message ID 20250605131235.366013-1-dixitparmar19@gmail.com
State New
Headers show
Series [1/1] kernel-module-split: fix conf file generation when KERNEL_SPLIT_MODULES=0 | expand

Commit Message

Dixit Parmar June 5, 2025, 1:12 p.m. UTC
KERNEL_MODULE_AUTOLOAD defines the list of the kernel modules to be autoloaded
on boot. kernel-module-split.bbclass generates the required modules.load.d and
conf files for each kernel module. This conf files inturn read by system service
to perform module loading and configuration. When a kernel module is added to
KERNEL_MODULE_AUTOLOAD the conf files must be generated in all cases.
When KERNEL_SPLIT_MODULES=0 modprobe and autoload conf files are not
getting generated for the kernel modules.
To fix that enhanced the class implementation by separating out conf
file handling mechanism in two functions, generate_conf_files() and
frob_metadata(). generate_conf_files() handles no-split case where as
frob_metadata() keeps handling the existing case for spliting the modules.
Splitted common handling/generation of conf files stuff in to handle_conf_files()
function which gets invoked by both frob_metadata() and generate_conf_files()
on top of the scenario specific handling done in respective functions.
This implementation covers generation of the conf files for in-tree kernel
modules as well as standalone kernel module built as seperate package/recipe.

[YOCTO #15145]

Signed-off-by: Dixit Parmar <dixitparmar19@gmail.com>

---
Previous version of the patch: https://lists.openembedded.org/g/openembedded-core/topic/111815220
oe-selftest patch: https://lists.openembedded.org/g/openembedded-core/message/218013

Validated these changes by the oe-selftest:
1. With the existing implementation the kernel_module_split.KernelSplitAutoloadTest.test_split_modules_disabled
test case fails because the autoload/modconf .conf files are not getting generated for each modules.
2. With this fix both enabled & disabled testcases are passed. Below are test case running results.

$ oe-selftest -r kernel_module_split.KernelSplitAutoloadTest.test_split_modules_disabled
2025-05-29 16:17:29,377 - oe-selftest - INFO - Adding layer libraries:
2025-05-29 16:17:29,377 - oe-selftest - INFO -  /data/home/diparmar/workspace/test/yocto-contri/poky/meta/lib
2025-05-29 16:17:29,377 - oe-selftest - INFO -  /data/home/diparmar/workspace/test/yocto-contri/poky/meta-yocto-bsp/lib
2025-05-29 16:17:29,377 - oe-selftest - INFO -  /data/home/diparmar/workspace/test/yocto-contri/poky/meta-selftest/lib
2025-05-29 16:17:29,378 - oe-selftest - INFO - Checking base configuration is valid/parsable
NOTE: Starting bitbake server...
2025-05-29 16:17:30,926 - oe-selftest - INFO - Adding: "include selftest.inc" in /data/home/diparmar/workspace/test/yocto-contri/poky/build-st/conf/local.conf
2025-05-29 16:17:30,927 - oe-selftest - INFO - Adding: "include bblayers.inc" in bblayers.conf
2025-05-29 16:17:30,927 - oe-selftest - INFO - test_split_modules_disabled (kernel_module_split.KernelSplitAutoloadTest)
2025-05-29 16:19:51,512 - oe-selftest - INFO -  ... ok
2025-05-29 16:20:00,367 - oe-selftest - INFO - ----------------------------------------------------------------------
2025-05-29 16:20:00,368 - oe-selftest - INFO - Ran 1 test in 149.890s
2025-05-29 16:20:00,368 - oe-selftest - INFO - OK
2025-05-29 16:20:09,019 - oe-selftest - INFO - RESULTS:
2025-05-29 16:20:09,019 - oe-selftest - INFO - RESULTS - kernel_module_split.KernelSplitAutoloadTest.test_split_modules_disabled: PASSED (140.59s)
2025-05-29 16:20:09,036 - oe-selftest - INFO - SUMMARY:
2025-05-29 16:20:09,037 - oe-selftest - INFO - oe-selftest () - Ran 1 test in 149.891s
2025-05-29 16:20:09,037 - oe-selftest - INFO - oe-selftest - OK - All required tests passed (successes=1, skipped=0, failures=0, errors=0)

===

$ oe-selftest -r kernel_module_split.KernelSplitAutoloadTest.test_split_modules_enabled
2025-05-29 16:20:53,538 - oe-selftest - INFO - Adding layer libraries:
2025-05-29 16:20:53,538 - oe-selftest - INFO -  /data/home/diparmar/workspace/test/yocto-contri/poky/meta/lib
2025-05-29 16:20:53,538 - oe-selftest - INFO -  /data/home/diparmar/workspace/test/yocto-contri/poky/meta-yocto-bsp/lib
2025-05-29 16:20:53,538 - oe-selftest - INFO -  /data/home/diparmar/workspace/test/yocto-contri/poky/meta-selftest/lib
2025-05-29 16:20:53,540 - oe-selftest - INFO - Checking base configuration is valid/parsable
NOTE: Starting bitbake server...
2025-05-29 16:20:55,000 - oe-selftest - INFO - Adding: "include selftest.inc" in /data/home/diparmar/workspace/test/yocto-contri/poky/build-st/conf/local.conf
2025-05-29 16:20:55,001 - oe-selftest - INFO - Adding: "include bblayers.inc" in bblayers.conf
2025-05-29 16:20:55,001 - oe-selftest - INFO - test_split_modules_enabled (kernel_module_split.KernelSplitAutoloadTest)
2025-05-29 16:23:08,930 - oe-selftest - INFO -  ... ok
2025-05-29 16:23:19,735 - oe-selftest - INFO - ----------------------------------------------------------------------
2025-05-29 16:23:19,735 - oe-selftest - INFO - Ran 1 test in 145.057s
2025-05-29 16:23:19,736 - oe-selftest - INFO - OK
2025-05-29 16:23:28,312 - oe-selftest - INFO - RESULTS:
2025-05-29 16:23:28,313 - oe-selftest - INFO - RESULTS - kernel_module_split.KernelSplitAutoloadTest.test_split_modules_enabled: PASSED (133.93s)
2025-05-29 16:23:28,321 - oe-selftest - INFO - SUMMARY:
2025-05-29 16:23:28,322 - oe-selftest - INFO - oe-selftest () - Ran 1 test in 145.058s
2025-05-29 16:23:28,322 - oe-selftest - INFO - oe-selftest - OK - All required tests passed (successes=1, skipped=0, failures=0, errors=0)
---
 .../kernel-module-split.bbclass               | 74 +++++++++++++++----
 1 file changed, 59 insertions(+), 15 deletions(-)

Comments

Bruce Ashfield June 5, 2025, 1:16 p.m. UTC | #1
On Thu, Jun 5, 2025 at 9:12 AM Dixit Parmar via lists.openembedded.org
<dixitparmar19=gmail.com@lists.openembedded.org> wrote:

> KERNEL_MODULE_AUTOLOAD defines the list of the kernel modules to be
> autoloaded
> on boot. kernel-module-split.bbclass generates the required modules.load.d
> and
> conf files for each kernel module. This conf files inturn read by system
> service
> to perform module loading and configuration. When a kernel module is added
> to
> KERNEL_MODULE_AUTOLOAD the conf files must be generated in all cases.
> When KERNEL_SPLIT_MODULES=0 modprobe and autoload conf files are not
> getting generated for the kernel modules.
> To fix that enhanced the class implementation by separating out conf
> file handling mechanism in two functions, generate_conf_files() and
> frob_metadata(). generate_conf_files() handles no-split case where as
> frob_metadata() keeps handling the existing case for spliting the modules.
> Splitted common handling/generation of conf files stuff in to
> handle_conf_files()
> function which gets invoked by both frob_metadata() and
> generate_conf_files()
> on top of the scenario specific handling done in respective functions.
> This implementation covers generation of the conf files for in-tree kernel
> modules as well as standalone kernel module built as seperate
> package/recipe.
>
> [YOCTO #15145]
>
> Signed-off-by: Dixit Parmar <dixitparmar19@gmail.com>
>
> ---
> Previous version of the patch:
> https://lists.openembedded.org/g/openembedded-core/topic/111815220
> oe-selftest
> <https://lists.openembedded.org/g/openembedded-core/topic/111815220oe-selftest>
> patch: https://lists.openembedded.org/g/openembedded-core/message/218013
>
> Validated these changes by the oe-selftest:
> 1. With the existing implementation the
> kernel_module_split.KernelSplitAutoloadTest.test_split_modules_disabled
> test case fails because the autoload/modconf .conf files are not getting
> generated for each modules.
> 2. With this fix both enabled & disabled testcases are passed. Below are
> test case running results.
>
> $ oe-selftest -r
> kernel_module_split.KernelSplitAutoloadTest.test_split_modules_disabled
> 2025-05-29 16:17:29,377 - oe-selftest - INFO - Adding layer libraries:
> 2025-05-29 16:17:29,377 - oe-selftest - INFO -
> /data/home/diparmar/workspace/test/yocto-contri/poky/meta/lib
> 2025-05-29 16:17:29,377 - oe-selftest - INFO -
> /data/home/diparmar/workspace/test/yocto-contri/poky/meta-yocto-bsp/lib
> 2025-05-29 16:17:29,377 - oe-selftest - INFO -
> /data/home/diparmar/workspace/test/yocto-contri/poky/meta-selftest/lib
> 2025-05-29 16:17:29,378 - oe-selftest - INFO - Checking base configuration
> is valid/parsable
> NOTE: Starting bitbake server...
> 2025-05-29 16:17:30,926 - oe-selftest - INFO - Adding: "include
> selftest.inc" in
> /data/home/diparmar/workspace/test/yocto-contri/poky/build-st/conf/local.conf
> 2025-05-29 16:17:30,927 - oe-selftest - INFO - Adding: "include
> bblayers.inc" in bblayers.conf
> 2025-05-29 16:17:30,927 - oe-selftest - INFO - test_split_modules_disabled
> (kernel_module_split.KernelSplitAutoloadTest)
> 2025-05-29 16:19:51,512 - oe-selftest - INFO -  ... ok
> 2025-05-29 16:20:00,367 - oe-selftest - INFO -
> ----------------------------------------------------------------------
> 2025-05-29 16:20:00,368 - oe-selftest - INFO - Ran 1 test in 149.890s
> 2025-05-29 16:20:00,368 - oe-selftest - INFO - OK
> 2025-05-29 16:20:09,019 - oe-selftest - INFO - RESULTS:
> 2025-05-29 16:20:09,019 - oe-selftest - INFO - RESULTS -
> kernel_module_split.KernelSplitAutoloadTest.test_split_modules_disabled:
> PASSED (140.59s)
> 2025-05-29 16:20:09,036 - oe-selftest - INFO - SUMMARY:
> 2025-05-29 16:20:09,037 - oe-selftest - INFO - oe-selftest () - Ran 1 test
> in 149.891s
> 2025-05-29 16:20:09,037 - oe-selftest - INFO - oe-selftest - OK - All
> required tests passed (successes=1, skipped=0, failures=0, errors=0)
>
> ===
>
> $ oe-selftest -r
> kernel_module_split.KernelSplitAutoloadTest.test_split_modules_enabled
> 2025-05-29 16:20:53,538 - oe-selftest - INFO - Adding layer libraries:
> 2025-05-29 16:20:53,538 - oe-selftest - INFO -
> /data/home/diparmar/workspace/test/yocto-contri/poky/meta/lib
> 2025-05-29 16:20:53,538 - oe-selftest - INFO -
> /data/home/diparmar/workspace/test/yocto-contri/poky/meta-yocto-bsp/lib
> 2025-05-29 16:20:53,538 - oe-selftest - INFO -
> /data/home/diparmar/workspace/test/yocto-contri/poky/meta-selftest/lib
> 2025-05-29 16:20:53,540 - oe-selftest - INFO - Checking base configuration
> is valid/parsable
> NOTE: Starting bitbake server...
> 2025-05-29 16:20:55,000 - oe-selftest - INFO - Adding: "include
> selftest.inc" in
> /data/home/diparmar/workspace/test/yocto-contri/poky/build-st/conf/local.conf
> 2025-05-29 16:20:55,001 - oe-selftest - INFO - Adding: "include
> bblayers.inc" in bblayers.conf
> 2025-05-29 16:20:55,001 - oe-selftest - INFO - test_split_modules_enabled
> (kernel_module_split.KernelSplitAutoloadTest)
> 2025-05-29 16:23:08,930 - oe-selftest - INFO -  ... ok
> 2025-05-29 16:23:19,735 - oe-selftest - INFO -
> ----------------------------------------------------------------------
> 2025-05-29 16:23:19,735 - oe-selftest - INFO - Ran 1 test in 145.057s
> 2025-05-29 16:23:19,736 - oe-selftest - INFO - OK
> 2025-05-29 16:23:28,312 - oe-selftest - INFO - RESULTS:
> 2025-05-29 16:23:28,313 - oe-selftest - INFO - RESULTS -
> kernel_module_split.KernelSplitAutoloadTest.test_split_modules_enabled:
> PASSED (133.93s)
> 2025-05-29 16:23:28,321 - oe-selftest - INFO - SUMMARY:
> 2025-05-29 16:23:28,322 - oe-selftest - INFO - oe-selftest () - Ran 1 test
> in 145.058s
> 2025-05-29 16:23:28,322 - oe-selftest - INFO - oe-selftest - OK - All
> required tests passed (successes=1, skipped=0, failures=0, errors=0)
>

With the tests, this version looks good to me!

Bruce



> ---
>  .../kernel-module-split.bbclass               | 74 +++++++++++++++----
>  1 file changed, 59 insertions(+), 15 deletions(-)
>
> diff --git a/meta/classes-recipe/kernel-module-split.bbclass
> b/meta/classes-recipe/kernel-module-split.bbclass
> index 9487365eb7..843f301f99 100644
> --- a/meta/classes-recipe/kernel-module-split.bbclass
> +++ b/meta/classes-recipe/kernel-module-split.bbclass
> @@ -86,11 +86,7 @@ python split_kernel_module_packages () {
>              vals[m.group(1)] = m.group(2)
>          return vals
>
> -    def frob_metadata(file, pkg, pattern, format, basename):
> -        vals = extract_modinfo(file)
> -
> -        dvar = d.getVar('PKGD')
> -
> +    def handle_conf_files(d, basename, pkg):
>          # If autoloading is requested, output
> ${modulesloaddir}/<name>.conf and append
>          # appropriate modprobe commands to the postinst
>          autoloadlist = (d.getVar("KERNEL_MODULE_AUTOLOAD") or "").split()
> @@ -101,7 +97,7 @@ python split_kernel_module_packages () {
>              bb.warn("module_autoload_%s is defined but '%s' isn't
> included in KERNEL_MODULE_AUTOLOAD, please add it there" % (basename,
> basename))
>          if basename in autoloadlist:
>              conf = '%s/%s.conf' % (d.getVar('modulesloaddir'), basename)
> -            name = '%s%s' % (dvar, conf)
> +            name = '%s%s' % (d.getVar('PKGD'), conf)
>              os.makedirs(os.path.dirname(name), exist_ok=True)
>              with open(name, 'w') as f:
>                  if autoload:
> @@ -114,7 +110,7 @@ python split_kernel_module_packages () {
>              d.appendVar('CONFFILES:%s' % pkg, conf2append)
>              postinst = d.getVar('pkg_postinst:%s' % pkg)
>              if not postinst:
> -                bb.fatal("pkg_postinst:%s not defined" % pkg)
> +                postinst = d.getVar('pkg_postinst:modules')
>              postinst += d.getVar('autoload_postinst_fragment') %
> (autoload or basename)
>              d.setVar('pkg_postinst:%s' % pkg, postinst)
>
> @@ -123,7 +119,7 @@ python split_kernel_module_packages () {
>          modconf = d.getVar('module_conf_%s' % basename)
>          if modconf and basename in modconflist:
>              conf = '%s/%s.conf' % (d.getVar('modprobedir'), basename)
> -            name = '%s%s' % (dvar, conf)
> +            name = '%s%s' % (d.getVar('PKGD'), conf)
>              os.makedirs(os.path.dirname(name), exist_ok=True)
>              with open(name, 'w') as f:
>                  f.write("%s\n" % modconf)
> @@ -134,6 +130,54 @@ python split_kernel_module_packages () {
>          elif modconf:
>              bb.error("Please ensure module %s is listed in
> KERNEL_MODULE_PROBECONF since module_conf_%s is set" % (basename, basename))
>
> +    def generate_conf_files(d, root, file_regex, output_pattern):
> +        """
> +        Arguments:
> +        root           -- the path in which to search. Contains system
> lib path
> +                          so needs expansion.
> +        file_regex     -- regular expression to match searched files. Use
> +                          parentheses () to mark the part of this
> expression
> +                          that should be used to derive the module name
> (to be
> +                          substituted where %s is used in other function
> +                          arguments as noted below)
> +        output_pattern -- pattern to use for the package names. Must
> include %s.
> +        """
> +        import re, stat
> +
> +        dvar = d.getVar('PKGD')
> +        root = d.expand(root)
> +
> +        # if the root directory doesn't exist, it's fatal - exit from the
> current execution.
> +        if not os.path.exists(dvar + root):
> +            bb.fatal("kernel module root directory path does not exist")
> +
> +        # walk through kernel module directory. for each entry in the
> directory, check if it
> +        # matches the desired regex pattern and file type. if it
> fullfills, process it to generate
> +        # it's conf file based on its package name.
> +        for walkroot, dirs, files in os.walk(dvar + root):
> +            for file in files:
> +                relpath = os.path.join(walkroot, file).replace(dvar +
> root + '/', '', 1)
> +                if not relpath:
> +                    continue
> +                m = re.match(file_regex, os.path.basename(relpath))
> +                if not m:
> +                    continue
> +                file_f = os.path.join(dvar + root, relpath)
> +                mode = os.lstat(file_f).st_mode
> +                if not (stat.S_ISREG(mode) or (allow_links and
> stat.S_ISLNK(mode)) or (allow_dirs and stat.S_ISDIR(mode))):
> +                    continue
> +
> +                basename = m.group(1)
> +                on = legitimize_package_name(basename)
> +                pkg = output_pattern % on
> +                handle_conf_files(d, basename, pkg)
> +
> +    def frob_metadata(file, pkg, pattern, format, basename):
> +        vals = extract_modinfo(file)
> +        dvar = d.getVar('PKGD')
> +
> +        handle_conf_files(d, basename, pkg)
> +
>          if "description" in vals:
>              old_desc = d.getVar('DESCRIPTION:' + pkg) or ""
>              d.setVar('DESCRIPTION:' + pkg, old_desc + "; " +
> vals["description"])
> @@ -167,19 +211,19 @@ python split_kernel_module_packages () {
>      postinst = d.getVar('pkg_postinst:modules')
>      postrm = d.getVar('pkg_postrm:modules')
>
> +    module_regex = r'^(.*)\.k?o(?:\.(gz|xz|zst))?$'
> +    module_pattern_prefix = d.getVar('KERNEL_MODULE_PACKAGE_PREFIX')
> +    module_pattern_suffix = d.getVar('KERNEL_MODULE_PACKAGE_SUFFIX')
> +    module_pattern = module_pattern_prefix + kernel_package_name +
> '-module-%s' + module_pattern_suffix
> +
>      if splitmods != '1':
>          d.appendVar('FILES:' + metapkg, '%s %s %s/modules' %
>              (d.getVar('modulesloaddir'), d.getVar('modprobedir'),
> d.getVar("nonarch_base_libdir")))
>          d.appendVar('pkg_postinst:%s' % metapkg, postinst)
> -        d.prependVar('pkg_postrm:%s' % metapkg, postrm);
> +        d.prependVar('pkg_postrm:%s' % metapkg, postrm)
> +        generate_conf_files(d, root='${nonarch_base_libdir}/modules',
> file_regex=module_regex, output_pattern=module_pattern)
>          return
>
> -    module_regex = r'^(.*)\.k?o(?:\.(gz|xz|zst))?$'
> -
> -    module_pattern_prefix = d.getVar('KERNEL_MODULE_PACKAGE_PREFIX')
> -    module_pattern_suffix = d.getVar('KERNEL_MODULE_PACKAGE_SUFFIX')
> -    module_pattern = module_pattern_prefix + kernel_package_name +
> '-module-%s' + module_pattern_suffix
> -
>      modules = do_split_packages(d, root='${nonarch_base_libdir}/modules',
> file_regex=module_regex, output_pattern=module_pattern, description='%s
> kernel module', postinst=postinst, postrm=postrm, recursive=True,
> hook=frob_metadata, extra_depends='%s-%s' % (kernel_package_name,
> kernel_version))
>      if modules:
>          d.appendVar('RDEPENDS:' + metapkg, ' '+' '.join(modules))
> --
> 2.43.0
>
>
> -=-=-=-=-=-=-=-=-=-=-=-
> Links: You receive all messages sent to this group.
> View/Reply Online (#218016):
> https://lists.openembedded.org/g/openembedded-core/message/218016
> Mute This Topic: https://lists.openembedded.org/mt/113484744/1050810
> Group Owner: openembedded-core+owner@lists.openembedded.org
> Unsubscribe: https://lists.openembedded.org/g/openembedded-core/unsub [
> bruce.ashfield@gmail.com]
> -=-=-=-=-=-=-=-=-=-=-=-
>
>
Mathieu Dubois-Briand June 6, 2025, 8:02 a.m. UTC | #2
On Thu Jun 5, 2025 at 3:12 PM CEST, Dixit Parmar via lists.openembedded.org wrote:
> KERNEL_MODULE_AUTOLOAD defines the list of the kernel modules to be autoloaded
> on boot. kernel-module-split.bbclass generates the required modules.load.d and
> conf files for each kernel module. This conf files inturn read by system service
> to perform module loading and configuration. When a kernel module is added to
> KERNEL_MODULE_AUTOLOAD the conf files must be generated in all cases.
> When KERNEL_SPLIT_MODULES=0 modprobe and autoload conf files are not
> getting generated for the kernel modules.
> To fix that enhanced the class implementation by separating out conf
> file handling mechanism in two functions, generate_conf_files() and
> frob_metadata(). generate_conf_files() handles no-split case where as
> frob_metadata() keeps handling the existing case for spliting the modules.
> Splitted common handling/generation of conf files stuff in to handle_conf_files()
> function which gets invoked by both frob_metadata() and generate_conf_files()
> on top of the scenario specific handling done in respective functions.
> This implementation covers generation of the conf files for in-tree kernel
> modules as well as standalone kernel module built as seperate package/recipe.
>
> [YOCTO #15145]
>
> Signed-off-by: Dixit Parmar <dixitparmar19@gmail.com>
>
> ---

Hi Dixit,

I have some conflicts while trying to apply this on master branch. Do
you confirm this is targeting master?
diff mbox series

Patch

diff --git a/meta/classes-recipe/kernel-module-split.bbclass b/meta/classes-recipe/kernel-module-split.bbclass
index 9487365eb7..843f301f99 100644
--- a/meta/classes-recipe/kernel-module-split.bbclass
+++ b/meta/classes-recipe/kernel-module-split.bbclass
@@ -86,11 +86,7 @@  python split_kernel_module_packages () {
             vals[m.group(1)] = m.group(2)
         return vals
 
-    def frob_metadata(file, pkg, pattern, format, basename):
-        vals = extract_modinfo(file)
-
-        dvar = d.getVar('PKGD')
-
+    def handle_conf_files(d, basename, pkg):
         # If autoloading is requested, output ${modulesloaddir}/<name>.conf and append
         # appropriate modprobe commands to the postinst
         autoloadlist = (d.getVar("KERNEL_MODULE_AUTOLOAD") or "").split()
@@ -101,7 +97,7 @@  python split_kernel_module_packages () {
             bb.warn("module_autoload_%s is defined but '%s' isn't included in KERNEL_MODULE_AUTOLOAD, please add it there" % (basename, basename))
         if basename in autoloadlist:
             conf = '%s/%s.conf' % (d.getVar('modulesloaddir'), basename)
-            name = '%s%s' % (dvar, conf)
+            name = '%s%s' % (d.getVar('PKGD'), conf)
             os.makedirs(os.path.dirname(name), exist_ok=True)
             with open(name, 'w') as f:
                 if autoload:
@@ -114,7 +110,7 @@  python split_kernel_module_packages () {
             d.appendVar('CONFFILES:%s' % pkg, conf2append)
             postinst = d.getVar('pkg_postinst:%s' % pkg)
             if not postinst:
-                bb.fatal("pkg_postinst:%s not defined" % pkg)
+                postinst = d.getVar('pkg_postinst:modules')
             postinst += d.getVar('autoload_postinst_fragment') % (autoload or basename)
             d.setVar('pkg_postinst:%s' % pkg, postinst)
 
@@ -123,7 +119,7 @@  python split_kernel_module_packages () {
         modconf = d.getVar('module_conf_%s' % basename)
         if modconf and basename in modconflist:
             conf = '%s/%s.conf' % (d.getVar('modprobedir'), basename)
-            name = '%s%s' % (dvar, conf)
+            name = '%s%s' % (d.getVar('PKGD'), conf)
             os.makedirs(os.path.dirname(name), exist_ok=True)
             with open(name, 'w') as f:
                 f.write("%s\n" % modconf)
@@ -134,6 +130,54 @@  python split_kernel_module_packages () {
         elif modconf:
             bb.error("Please ensure module %s is listed in KERNEL_MODULE_PROBECONF since module_conf_%s is set" % (basename, basename))
 
+    def generate_conf_files(d, root, file_regex, output_pattern):
+        """
+        Arguments:
+        root           -- the path in which to search. Contains system lib path
+                          so needs expansion.
+        file_regex     -- regular expression to match searched files. Use
+                          parentheses () to mark the part of this expression
+                          that should be used to derive the module name (to be
+                          substituted where %s is used in other function
+                          arguments as noted below)
+        output_pattern -- pattern to use for the package names. Must include %s.
+        """
+        import re, stat
+
+        dvar = d.getVar('PKGD')
+        root = d.expand(root)
+
+        # if the root directory doesn't exist, it's fatal - exit from the current execution.
+        if not os.path.exists(dvar + root):
+            bb.fatal("kernel module root directory path does not exist")
+
+        # walk through kernel module directory. for each entry in the directory, check if it
+        # matches the desired regex pattern and file type. if it fullfills, process it to generate
+        # it's conf file based on its package name.
+        for walkroot, dirs, files in os.walk(dvar + root):
+            for file in files:
+                relpath = os.path.join(walkroot, file).replace(dvar + root + '/', '', 1)
+                if not relpath:
+                    continue
+                m = re.match(file_regex, os.path.basename(relpath))
+                if not m:
+                    continue
+                file_f = os.path.join(dvar + root, relpath)
+                mode = os.lstat(file_f).st_mode
+                if not (stat.S_ISREG(mode) or (allow_links and stat.S_ISLNK(mode)) or (allow_dirs and stat.S_ISDIR(mode))):
+                    continue
+
+                basename = m.group(1)
+                on = legitimize_package_name(basename)
+                pkg = output_pattern % on
+                handle_conf_files(d, basename, pkg)
+
+    def frob_metadata(file, pkg, pattern, format, basename):
+        vals = extract_modinfo(file)
+        dvar = d.getVar('PKGD')
+
+        handle_conf_files(d, basename, pkg)
+
         if "description" in vals:
             old_desc = d.getVar('DESCRIPTION:' + pkg) or ""
             d.setVar('DESCRIPTION:' + pkg, old_desc + "; " + vals["description"])
@@ -167,19 +211,19 @@  python split_kernel_module_packages () {
     postinst = d.getVar('pkg_postinst:modules')
     postrm = d.getVar('pkg_postrm:modules')
 
+    module_regex = r'^(.*)\.k?o(?:\.(gz|xz|zst))?$'
+    module_pattern_prefix = d.getVar('KERNEL_MODULE_PACKAGE_PREFIX')
+    module_pattern_suffix = d.getVar('KERNEL_MODULE_PACKAGE_SUFFIX')
+    module_pattern = module_pattern_prefix + kernel_package_name + '-module-%s' + module_pattern_suffix
+
     if splitmods != '1':
         d.appendVar('FILES:' + metapkg, '%s %s %s/modules' %
             (d.getVar('modulesloaddir'), d.getVar('modprobedir'), d.getVar("nonarch_base_libdir")))
         d.appendVar('pkg_postinst:%s' % metapkg, postinst)
-        d.prependVar('pkg_postrm:%s' % metapkg, postrm);
+        d.prependVar('pkg_postrm:%s' % metapkg, postrm)
+        generate_conf_files(d, root='${nonarch_base_libdir}/modules', file_regex=module_regex, output_pattern=module_pattern)
         return
 
-    module_regex = r'^(.*)\.k?o(?:\.(gz|xz|zst))?$'
-
-    module_pattern_prefix = d.getVar('KERNEL_MODULE_PACKAGE_PREFIX')
-    module_pattern_suffix = d.getVar('KERNEL_MODULE_PACKAGE_SUFFIX')
-    module_pattern = module_pattern_prefix + kernel_package_name + '-module-%s' + module_pattern_suffix
-
     modules = do_split_packages(d, root='${nonarch_base_libdir}/modules', file_regex=module_regex, output_pattern=module_pattern, description='%s kernel module', postinst=postinst, postrm=postrm, recursive=True, hook=frob_metadata, extra_depends='%s-%s' % (kernel_package_name, kernel_version))
     if modules:
         d.appendVar('RDEPENDS:' + metapkg, ' '+' '.join(modules))