* [PATCH] rootfs: run kernel-install after update-initramfs
@ 2026-04-15 12:55 srinuvasan.a via isar-users
2026-04-15 13:05 ` 'Jan Kiszka' via isar-users
2026-04-17 7:35 ` 'Quirin Gylstorff' via isar-users
0 siblings, 2 replies; 7+ messages in thread
From: srinuvasan.a via isar-users @ 2026-04-15 12:55 UTC (permalink / raw)
To: isar-users; +Cc: srinuvasan, Shivaschandra KL
From: srinuvasan <srinuvasan.a@siemens.com>
When efibootguard is used as the primary bootloader and
systemd-boot as secondary, the WIC plugin expects /boot/EFI/Linux
to contain a unified kernel image for first boot.
Run kernel-install after update-initramfs to ensure the unified
kernel image is generated and placed correctly.
Invoke kernel-install for UKI generation only when:
- ukify binary is available
- /usr/lib/kernel/install.conf exists
Signed-off-by: Shivaschandra KL <shivaschandra.k-l@siemens.com>
Signed-off-by: srinuvasan <srinuvasan.a@siemens.com>
---
meta/classes-recipe/rootfs.bbclass | 20 +++++++++++++++++---
1 file changed, 17 insertions(+), 3 deletions(-)
diff --git a/meta/classes-recipe/rootfs.bbclass b/meta/classes-recipe/rootfs.bbclass
index a9233111..9024f006 100644
--- a/meta/classes-recipe/rootfs.bbclass
+++ b/meta/classes-recipe/rootfs.bbclass
@@ -14,10 +14,20 @@ ROOTFS_DISTRO ?= "${DISTRO}"
ROOTFS_USE_DRACUT ??= ""
def initramfs_generator_cmdline(d):
- rootfs_packages = d.getVar('ROOTFS_PACKAGES') or ''
+ rootfs_packages = d.getVar('ROOTFS_PACKAGES') or ''
+
if 'dracut' in rootfs_packages or bb.utils.to_boolean(d.getVar('ROOTFS_USE_DRACUT')):
- return "dracut --force --kver \"$kernel_version\""
- return "update-initramfs -u -v -k \"$kernel_version\""
+ return 'dracut --force --kver "$kernel_version"'
+
+ cmdline = 'update-initramfs -u -v -k "$kernel_version"'
+
+ cmdline += (
+ '; command -v ukify >/dev/null && [ -f /usr/lib/kernel/install.conf ] && '
+ 'kernel-install add "$kernel_version" "/boot/${kernel##*/}" '
+ '"/boot/initrd.img-$kernel_version" || :'
+ )
+
+ return cmdline
ROOTFS_PACKAGES ?= ""
ROOTFS_VARDEPS ?= ""
@@ -627,6 +637,10 @@ python do_generate_initramfs_setscene () {
}
rootfs_generate_initramfs[progress] = "custom:rootfs_progress.InitrdProgressHandler"
+rootfs_generate_initramfs:prepend() {
+ export kernel
+}
+
rootfs_generate_initramfs() {
if [ -n "$(sudo find '${ROOTFSDIR}/boot' -type f -name 'vmlinu[xz]*')" ]; then
for kernel in ${ROOTFSDIR}/boot/vmlinu[xz]-*; do
--
2.39.5
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^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH] rootfs: run kernel-install after update-initramfs
2026-04-15 12:55 [PATCH] rootfs: run kernel-install after update-initramfs srinuvasan.a via isar-users
@ 2026-04-15 13:05 ` 'Jan Kiszka' via isar-users
2026-04-16 12:16 ` Srinuvasan Arjunan
2026-04-17 4:55 ` 'Arjunan, Srinu' via isar-users
2026-04-17 7:35 ` 'Quirin Gylstorff' via isar-users
1 sibling, 2 replies; 7+ messages in thread
From: 'Jan Kiszka' via isar-users @ 2026-04-15 13:05 UTC (permalink / raw)
To: srinuvasan.a, isar-users; +Cc: Shivaschandra KL
On 15.04.26 14:55, srinuvasan.a via isar-users wrote:
> From: srinuvasan <srinuvasan.a@siemens.com>
>
> When efibootguard is used as the primary bootloader and
> systemd-boot as secondary, the WIC plugin expects /boot/EFI/Linux
> to contain a unified kernel image for first boot.
>
Err, where/how do you define "primary" and "secondary" EFI bootloaders?
Note that EBG is isar-cip-core, and there we definitely do not have such
a concept. Can you elaborate what you want to achieve?
> Run kernel-install after update-initramfs to ensure the unified
> kernel image is generated and placed correctly.
>
> Invoke kernel-install for UKI generation only when:
> - ukify binary is available
> - /usr/lib/kernel/install.conf exists
>
> Signed-off-by: Shivaschandra KL <shivaschandra.k-l@siemens.com>
> Signed-off-by: srinuvasan <srinuvasan.a@siemens.com>
> ---
> meta/classes-recipe/rootfs.bbclass | 20 +++++++++++++++++---
> 1 file changed, 17 insertions(+), 3 deletions(-)
>
> diff --git a/meta/classes-recipe/rootfs.bbclass b/meta/classes-recipe/rootfs.bbclass
> index a9233111..9024f006 100644
> --- a/meta/classes-recipe/rootfs.bbclass
> +++ b/meta/classes-recipe/rootfs.bbclass
> @@ -14,10 +14,20 @@ ROOTFS_DISTRO ?= "${DISTRO}"
> ROOTFS_USE_DRACUT ??= ""
>
> def initramfs_generator_cmdline(d):
> - rootfs_packages = d.getVar('ROOTFS_PACKAGES') or ''
> + rootfs_packages = d.getVar('ROOTFS_PACKAGES') or ''
> +
> if 'dracut' in rootfs_packages or bb.utils.to_boolean(d.getVar('ROOTFS_USE_DRACUT')):
> - return "dracut --force --kver \"$kernel_version\""
> - return "update-initramfs -u -v -k \"$kernel_version\""
> + return 'dracut --force --kver "$kernel_version"'
> +
> + cmdline = 'update-initramfs -u -v -k "$kernel_version"'
> +
> + cmdline += (
> + '; command -v ukify >/dev/null && [ -f /usr/lib/kernel/install.conf ] && '
Who is using ukify? No one in isar or isar-cip-core at least. Are you
referring to an out-of-tree wic plugin with these changes?
In-tree (Isar), we still need to enable
meta/scripts/lib/wic/plugins/source/bootimg-efi-isar.py to generate
UKIs. But that would be systemd-boot UKI-only, no EBG then.
Jan
> + 'kernel-install add "$kernel_version" "/boot/${kernel##*/}" '
> + '"/boot/initrd.img-$kernel_version" || :'
> + )
> +
> + return cmdline
>
> ROOTFS_PACKAGES ?= ""
> ROOTFS_VARDEPS ?= ""
> @@ -627,6 +637,10 @@ python do_generate_initramfs_setscene () {
> }
>
> rootfs_generate_initramfs[progress] = "custom:rootfs_progress.InitrdProgressHandler"
> +rootfs_generate_initramfs:prepend() {
> + export kernel
> +}
> +
> rootfs_generate_initramfs() {
> if [ -n "$(sudo find '${ROOTFSDIR}/boot' -type f -name 'vmlinu[xz]*')" ]; then
> for kernel in ${ROOTFSDIR}/boot/vmlinu[xz]-*; do
--
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Linux Expert Center
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^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH] rootfs: run kernel-install after update-initramfs
2026-04-15 13:05 ` 'Jan Kiszka' via isar-users
@ 2026-04-16 12:16 ` Srinuvasan Arjunan
2026-04-20 9:33 ` Srinuvasan Arjunan
2026-04-17 4:55 ` 'Arjunan, Srinu' via isar-users
1 sibling, 1 reply; 7+ messages in thread
From: Srinuvasan Arjunan @ 2026-04-16 12:16 UTC (permalink / raw)
To: isar-users
[-- Attachment #1.1: Type: text/plain, Size: 4328 bytes --]
On Wednesday, April 15, 2026 at 6:35:30 PM UTC+5:30 Jan Kiszka wrote:
On 15.04.26 14:55, srinuvasan.a via isar-users wrote:
> From: srinuvasan <srinuv...@siemens.com>
>
> When efibootguard is used as the primary bootloader and
> systemd-boot as secondary, the WIC plugin expects /boot/EFI/Linux
> to contain a unified kernel image for first boot.
>
Err, where/how do you define "primary" and "secondary" EFI bootloaders?
Note that EBG is isar-cip-core, and there we definitely do not have such
a concept. Can you elaborate what you want to achieve?
> Run kernel-install after update-initramfs to ensure the unified
> kernel image is generated and placed correctly.
>
> Invoke kernel-install for UKI generation only when:
> - ukify binary is available
> - /usr/lib/kernel/install.conf exists
>
> Signed-off-by: Shivaschandra KL <shivasch...@siemens.com>
> Signed-off-by: srinuvasan <srinuv...@siemens.com>
> ---
> meta/classes-recipe/rootfs.bbclass | 20 +++++++++++++++++---
> 1 file changed, 17 insertions(+), 3 deletions(-)
>
> diff --git a/meta/classes-recipe/rootfs.bbclass
b/meta/classes-recipe/rootfs.bbclass
> index a9233111..9024f006 100644
> --- a/meta/classes-recipe/rootfs.bbclass
> +++ b/meta/classes-recipe/rootfs.bbclass
> @@ -14,10 +14,20 @@ ROOTFS_DISTRO ?= "${DISTRO}"
> ROOTFS_USE_DRACUT ??= ""
>
> def initramfs_generator_cmdline(d):
> - rootfs_packages = d.getVar('ROOTFS_PACKAGES') or ''
> + rootfs_packages = d.getVar('ROOTFS_PACKAGES') or ''
> +
> if 'dracut' in rootfs_packages or
bb.utils.to_boolean(d.getVar('ROOTFS_USE_DRACUT')):
> - return "dracut --force --kver \"$kernel_version\""
> - return "update-initramfs -u -v -k \"$kernel_version\""
> + return 'dracut --force --kver "$kernel_version"'
> +
> + cmdline = 'update-initramfs -u -v -k "$kernel_version"'
> +
> + cmdline += (
> + '; command -v ukify >/dev/null && [ -f /usr/lib/kernel/install.conf ]
&& '
Who is using ukify? No one in isar or isar-cip-core at least. Are you
referring to an out-of-tree wic plugin with these changes?
In-tree (Isar), we still need to enable
meta/scripts/lib/wic/plugins/source/bootimg-efi-isar.py to generate
UKIs. But that would be systemd-boot UKI-only, no EBG then.
Jan
Hi Jan,
In our downstream project, we use a combination of EBG and systemd-boot,
along with UKI (ukify) images.
EBG acts as the primary bootloader to enable watchdog support during early
boot, while systemd-boot is used as a secondary bootloader to select the
appropriate Btrfs snapshot along with its corresponding UKI image.
If the system fails to be successfully “blessed” (e.g., due to issues
detected during validation of a newly created Btrfs snapshot), we need a
mechanism to fall back to a previously working snapshot and its associated
UKI image. This fallback selection is handled by systemd-boot.
To support this flow, the WIC plugin expects /boot/EFI/Linux to contain the
unified kernel image required for the first boot.
Therefore, we run kernel-install after update-initramfs to ensure that the
unified kernel image is properly generated and placed in the expected
location.
Many thanks,
Srinu
> + 'kernel-install add "$kernel_version" "/boot/${kernel##*/}" '
> + '"/boot/initrd.img-$kernel_version" || :'
> + )
> +
> + return cmdline
>
> ROOTFS_PACKAGES ?= ""
> ROOTFS_VARDEPS ?= ""
> @@ -627,6 +637,10 @@ python do_generate_initramfs_setscene () {
> }
>
> rootfs_generate_initramfs[progress] =
"custom:rootfs_progress.InitrdProgressHandler"
> +rootfs_generate_initramfs:prepend() {
> + export kernel
> +}
> +
> rootfs_generate_initramfs() {
> if [ -n "$(sudo find '${ROOTFSDIR}/boot' -type f -name 'vmlinu[xz]*')" ];
then
> for kernel in ${ROOTFSDIR}/boot/vmlinu[xz]-*; do
--
Siemens AG, Foundational Technologies
Linux Expert Center
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^ permalink raw reply [flat|nested] 7+ messages in thread
* RE: [PATCH] rootfs: run kernel-install after update-initramfs
2026-04-15 13:05 ` 'Jan Kiszka' via isar-users
2026-04-16 12:16 ` Srinuvasan Arjunan
@ 2026-04-17 4:55 ` 'Arjunan, Srinu' via isar-users
2026-04-17 7:27 ` 'Jan Kiszka' via isar-users
1 sibling, 1 reply; 7+ messages in thread
From: 'Arjunan, Srinu' via isar-users @ 2026-04-17 4:55 UTC (permalink / raw)
To: Kiszka, Jan, isar-users; +Cc: K L, Shivaschandra
> Err, where/how do you define "primary" and "secondary" EFI bootloaders?
> Note that EBG is isar-cip-core, and there we definitely do not have such a concept. Can you
> elaborate what you want to achieve?
In our downstream project, we use a combination of EBG and systemd-boot, along with UKI (ukify) images.
EBG acts as the primary bootloader to enable watchdog support during early boot,
while systemd-boot is used as a secondary bootloader to select the appropriate Btrfs snapshot along with its corresponding UKI image.
If the system fails to be successfully “blessed” (e.g., due to issues detected during validation of a newly created Btrfs snapshot),
we need a mechanism to fall back to a previously working snapshot and its associated UKI image. This fallback selection is handled by systemd-boot.
To support this flow, the WIC plugin expects /boot/EFI/Linux to contain the unified kernel image required for the first boot.
Therefore, we run kernel-install after update-initramfs to ensure that the unified kernel image is properly
generated and placed in the expected location.
Many thanks,
Srinu
-----Original Message-----
From: Kiszka, Jan (FT RPD CED) <jan.kiszka@siemens.com>
Sent: 15 April 2026 18:35
To: Arjunan, Srinu (FT FDS CES LX PBU 2) <srinuvasan.a@siemens.com>; isar-users@googlegroups.com
Cc: K L, Shivaschandra (FT FDS CES LX PBU 1) <shivaschandra.k-l@siemens.com>
Subject: Re: [PATCH] rootfs: run kernel-install after update-initramfs
On 15.04.26 14:55, srinuvasan.a via isar-users wrote:
> From: srinuvasan <srinuvasan.a@siemens.com>
>
> When efibootguard is used as the primary bootloader and systemd-boot
> as secondary, the WIC plugin expects /boot/EFI/Linux to contain a
> unified kernel image for first boot.
>
Err, where/how do you define "primary" and "secondary" EFI bootloaders?
Note that EBG is isar-cip-core, and there we definitely do not have such a concept. Can you elaborate what you want to achieve?
> Run kernel-install after update-initramfs to ensure the unified kernel
> image is generated and placed correctly.
>
> Invoke kernel-install for UKI generation only when:
> - ukify binary is available
> - /usr/lib/kernel/install.conf exists
>
> Signed-off-by: Shivaschandra KL <shivaschandra.k-l@siemens.com>
> Signed-off-by: srinuvasan <srinuvasan.a@siemens.com>
> ---
> meta/classes-recipe/rootfs.bbclass | 20 +++++++++++++++++---
> 1 file changed, 17 insertions(+), 3 deletions(-)
>
> diff --git a/meta/classes-recipe/rootfs.bbclass
> b/meta/classes-recipe/rootfs.bbclass
> index a9233111..9024f006 100644
> --- a/meta/classes-recipe/rootfs.bbclass
> +++ b/meta/classes-recipe/rootfs.bbclass
> @@ -14,10 +14,20 @@ ROOTFS_DISTRO ?= "${DISTRO}"
> ROOTFS_USE_DRACUT ??= ""
>
> def initramfs_generator_cmdline(d):
> - rootfs_packages = d.getVar('ROOTFS_PACKAGES') or ''
> + rootfs_packages = d.getVar('ROOTFS_PACKAGES') or ''
> +
> if 'dracut' in rootfs_packages or bb.utils.to_boolean(d.getVar('ROOTFS_USE_DRACUT')):
> - return "dracut --force --kver \"$kernel_version\""
> - return "update-initramfs -u -v -k \"$kernel_version\""
> + return 'dracut --force --kver "$kernel_version"'
> +
> + cmdline = 'update-initramfs -u -v -k "$kernel_version"'
> +
> + cmdline += (
> + '; command -v ukify >/dev/null && [ -f /usr/lib/kernel/install.conf ] && '
Who is using ukify? No one in isar or isar-cip-core at least. Are you referring to an out-of-tree wic plugin with these changes?
In-tree (Isar), we still need to enable
meta/scripts/lib/wic/plugins/source/bootimg-efi-isar.py to generate UKIs. But that would be systemd-boot UKI-only, no EBG then.
Jan
> + 'kernel-install add "$kernel_version" "/boot/${kernel##*/}" '
> + '"/boot/initrd.img-$kernel_version" || :'
> + )
> +
> + return cmdline
>
> ROOTFS_PACKAGES ?= ""
> ROOTFS_VARDEPS ?= ""
> @@ -627,6 +637,10 @@ python do_generate_initramfs_setscene () { }
>
> rootfs_generate_initramfs[progress] = "custom:rootfs_progress.InitrdProgressHandler"
> +rootfs_generate_initramfs:prepend() {
> + export kernel
> +}
> +
> rootfs_generate_initramfs() {
> if [ -n "$(sudo find '${ROOTFSDIR}/boot' -type f -name 'vmlinu[xz]*')" ]; then
> for kernel in ${ROOTFSDIR}/boot/vmlinu[xz]-*; do
--
Siemens AG, Foundational Technologies
Linux Expert Center
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^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH] rootfs: run kernel-install after update-initramfs
2026-04-17 4:55 ` 'Arjunan, Srinu' via isar-users
@ 2026-04-17 7:27 ` 'Jan Kiszka' via isar-users
0 siblings, 0 replies; 7+ messages in thread
From: 'Jan Kiszka' via isar-users @ 2026-04-17 7:27 UTC (permalink / raw)
To: Arjunan, Srinu (FT FDS CES LX PBU 2), isar-users
Cc: K L, Shivaschandra (FT FDS CES LX PBU 1)
On 17.04.26 06:55, Arjunan, Srinu (FT FDS CES LX PBU 2) wrote:
>> Err, where/how do you define "primary" and "secondary" EFI bootloaders?
>> Note that EBG is isar-cip-core, and there we definitely do not have such a concept. Can you
>> elaborate what you want to achieve?
>
> In our downstream project, we use a combination of EBG and systemd-boot, along with UKI (ukify) images.
>
> EBG acts as the primary bootloader to enable watchdog support during early boot,
> while systemd-boot is used as a secondary bootloader to select the appropriate Btrfs snapshot along with its corresponding UKI image.
https://gitlab.com/cip-project/cip-core/isar-cip-core/-/commits/wip/abvar?ref_type=heads
Please contribute/continue so that we can find a standard and robust
version is CIP. Last version I saw internally was just broken.
Jan
--
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^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH] rootfs: run kernel-install after update-initramfs
2026-04-15 12:55 [PATCH] rootfs: run kernel-install after update-initramfs srinuvasan.a via isar-users
2026-04-15 13:05 ` 'Jan Kiszka' via isar-users
@ 2026-04-17 7:35 ` 'Quirin Gylstorff' via isar-users
1 sibling, 0 replies; 7+ messages in thread
From: 'Quirin Gylstorff' via isar-users @ 2026-04-17 7:35 UTC (permalink / raw)
To: isar-users
On 4/15/26 2:55 PM, srinuvasan.a via isar-users wrote:
> From: srinuvasan <srinuvasan.a@siemens.com>
>
> When efibootguard is used as the primary bootloader and
> systemd-boot as secondary, the WIC plugin expects /boot/EFI/Linux
> to contain a unified kernel image for first boot.
>
> Run kernel-install after update-initramfs to ensure the unified
> kernel image is generated and placed correctly.
>
> Invoke kernel-install for UKI generation only when:
> - ukify binary is available
> - /usr/lib/kernel/install.conf exists
>
> Signed-off-by: Shivaschandra KL <shivaschandra.k-l@siemens.com>
> Signed-off-by: srinuvasan <srinuvasan.a@siemens.com>
> ---
> meta/classes-recipe/rootfs.bbclass | 20 +++++++++++++++++---
> 1 file changed, 17 insertions(+), 3 deletions(-)
>
> diff --git a/meta/classes-recipe/rootfs.bbclass b/meta/classes-recipe/rootfs.bbclass
> index a9233111..9024f006 100644
> --- a/meta/classes-recipe/rootfs.bbclass
> +++ b/meta/classes-recipe/rootfs.bbclass
> @@ -14,10 +14,20 @@ ROOTFS_DISTRO ?= "${DISTRO}"
> ROOTFS_USE_DRACUT ??= ""
>
> def initramfs_generator_cmdline(d):
> - rootfs_packages = d.getVar('ROOTFS_PACKAGES') or ''
> + rootfs_packages = d.getVar('ROOTFS_PACKAGES') or ''
> +
> if 'dracut' in rootfs_packages or bb.utils.to_boolean(d.getVar('ROOTFS_USE_DRACUT')):
> - return "dracut --force --kver \"$kernel_version\""
> - return "update-initramfs -u -v -k \"$kernel_version\""
> + return 'dracut --force --kver "$kernel_version"'
> +
> + cmdline = 'update-initramfs -u -v -k "$kernel_version"'
> +
> + cmdline += (
> + '; command -v ukify >/dev/null && [ -f /usr/lib/kernel/install.conf ] && '
> + 'kernel-install add "$kernel_version" "/boot/${kernel##*/}" '
> + '"/boot/initrd.img-$kernel_version" || :'
Why are you not using the uki build of dracut?
Quirin
> + )
> +
> + return cmdline
>
> ROOTFS_PACKAGES ?= ""
> ROOTFS_VARDEPS ?= ""
> @@ -627,6 +637,10 @@ python do_generate_initramfs_setscene () {
> }
>
> rootfs_generate_initramfs[progress] = "custom:rootfs_progress.InitrdProgressHandler"
> +rootfs_generate_initramfs:prepend() {
> + export kernel
> +}
> +
> rootfs_generate_initramfs() {
> if [ -n "$(sudo find '${ROOTFSDIR}/boot' -type f -name 'vmlinu[xz]*')" ]; then
> for kernel in ${ROOTFSDIR}/boot/vmlinu[xz]-*; do
--
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^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH] rootfs: run kernel-install after update-initramfs
2026-04-16 12:16 ` Srinuvasan Arjunan
@ 2026-04-20 9:33 ` Srinuvasan Arjunan
0 siblings, 0 replies; 7+ messages in thread
From: Srinuvasan Arjunan @ 2026-04-20 9:33 UTC (permalink / raw)
To: isar-users
[-- Attachment #1.1: Type: text/plain, Size: 4750 bytes --]
Please ignore my previous message—it was accidentally sent from my end.
Apologies for the confusion.
Many thanks,
Srinu
On Monday, April 20, 2026 at 2:53:20 PM UTC+5:30 Srinuvasan Arjunan wrote:
> On Wednesday, April 15, 2026 at 6:35:30 PM UTC+5:30 Jan Kiszka wrote:
>
> On 15.04.26 14:55, srinuvasan.a via isar-users wrote:
> > From: srinuvasan <srinuv...@siemens.com>
> >
> > When efibootguard is used as the primary bootloader and
> > systemd-boot as secondary, the WIC plugin expects /boot/EFI/Linux
> > to contain a unified kernel image for first boot.
> >
>
> Err, where/how do you define "primary" and "secondary" EFI bootloaders?
> Note that EBG is isar-cip-core, and there we definitely do not have such
> a concept. Can you elaborate what you want to achieve?
>
> > Run kernel-install after update-initramfs to ensure the unified
> > kernel image is generated and placed correctly.
> >
> > Invoke kernel-install for UKI generation only when:
> > - ukify binary is available
> > - /usr/lib/kernel/install.conf exists
> >
> > Signed-off-by: Shivaschandra KL <shivasch...@siemens.com>
> > Signed-off-by: srinuvasan <srinuv...@siemens.com>
> > ---
> > meta/classes-recipe/rootfs.bbclass | 20 +++++++++++++++++---
> > 1 file changed, 17 insertions(+), 3 deletions(-)
> >
> > diff --git a/meta/classes-recipe/rootfs.bbclass
> b/meta/classes-recipe/rootfs.bbclass
> > index a9233111..9024f006 100644
> > --- a/meta/classes-recipe/rootfs.bbclass
> > +++ b/meta/classes-recipe/rootfs.bbclass
> > @@ -14,10 +14,20 @@ ROOTFS_DISTRO ?= "${DISTRO}"
> > ROOTFS_USE_DRACUT ??= ""
> >
> > def initramfs_generator_cmdline(d):
> > - rootfs_packages = d.getVar('ROOTFS_PACKAGES') or ''
> > + rootfs_packages = d.getVar('ROOTFS_PACKAGES') or ''
> > +
> > if 'dracut' in rootfs_packages or
> bb.utils.to_boolean(d.getVar('ROOTFS_USE_DRACUT')):
> > - return "dracut --force --kver \"$kernel_version\""
> > - return "update-initramfs -u -v -k \"$kernel_version\""
> > + return 'dracut --force --kver "$kernel_version"'
> > +
> > + cmdline = 'update-initramfs -u -v -k "$kernel_version"'
> > +
> > + cmdline += (
> > + '; command -v ukify >/dev/null && [ -f /usr/lib/kernel/install.conf ]
> && '
>
> Who is using ukify? No one in isar or isar-cip-core at least. Are you
> referring to an out-of-tree wic plugin with these changes?
>
> In-tree (Isar), we still need to enable
> meta/scripts/lib/wic/plugins/source/bootimg-efi-isar.py to generate
> UKIs. But that would be systemd-boot UKI-only, no EBG then.
>
> Jan
>
>
> Hi Jan,
>
> In our downstream project, we use a combination of EBG and systemd-boot,
> along with UKI (ukify) images.
>
> EBG acts as the primary bootloader to enable watchdog support during early
> boot, while systemd-boot is used as a secondary bootloader to select the
> appropriate Btrfs snapshot along with its corresponding UKI image.
>
> If the system fails to be successfully “blessed” (e.g., due to issues
> detected during validation of a newly created Btrfs snapshot), we need a
> mechanism to fall back to a previously working snapshot and its associated
> UKI image. This fallback selection is handled by systemd-boot.
>
> To support this flow, the WIC plugin expects /boot/EFI/Linux to contain
> the unified kernel image required for the first boot.
> Therefore, we run kernel-install after update-initramfs to ensure that the
> unified kernel image is properly generated and placed in the expected
> location.
>
> Many thanks,
> Srinu
>
> > + 'kernel-install add "$kernel_version" "/boot/${kernel##*/}" '
> > + '"/boot/initrd.img-$kernel_version" || :'
> > + )
> > +
> > + return cmdline
> >
> > ROOTFS_PACKAGES ?= ""
> > ROOTFS_VARDEPS ?= ""
> > @@ -627,6 +637,10 @@ python do_generate_initramfs_setscene () {
> > }
> >
> > rootfs_generate_initramfs[progress] =
> "custom:rootfs_progress.InitrdProgressHandler"
> > +rootfs_generate_initramfs:prepend() {
> > + export kernel
> > +}
> > +
> > rootfs_generate_initramfs() {
> > if [ -n "$(sudo find '${ROOTFSDIR}/boot' -type f -name 'vmlinu[xz]*')"
> ]; then
> > for kernel in ${ROOTFSDIR}/boot/vmlinu[xz]-*; do
>
>
> --
> Siemens AG, Foundational Technologies
> Linux Expert Center
>
>
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2026-04-15 12:55 [PATCH] rootfs: run kernel-install after update-initramfs srinuvasan.a via isar-users
2026-04-15 13:05 ` 'Jan Kiszka' via isar-users
2026-04-16 12:16 ` Srinuvasan Arjunan
2026-04-20 9:33 ` Srinuvasan Arjunan
2026-04-17 4:55 ` 'Arjunan, Srinu' via isar-users
2026-04-17 7:27 ` 'Jan Kiszka' via isar-users
2026-04-17 7:35 ` 'Quirin Gylstorff' via isar-users
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