On Thu, Mar 30, 2023 at 08:01:42PM -0400, Denys Dmytriyenko wrote:
> On Thu, Mar 30, 2023 at 04:24:40PM -0500, Ryan Eatmon via 
> lists.yoctoproject.org wrote:
> > While we are mirgrating to kernel v6.1 and u-boot 2023.04, we want to
> > keep kernel 5.10 and u-boot 2021.01 "working" for anyone looking at
> > kirkstone.
> 
> 
> >  One of the changes we are looking at changing is the signing of entries 
> > in the fitImage.
> 
> You might want to rephrase this one :)
> 
> 
> > To try and acheive a limited parity with dunfell while we work on the
> > migration, this creates a class that implements the logic that was in
> > dunfell and applies that class to the 5.10 kernel.
> 
> Maybe mention falling back to using SECDEV tooling for now instead of 
> uboot-sign class, with the plan to get back and clean it up later?
> 
> 
> > Signed-off-by: Ryan Eatmon <[email protected]>

The comments are minor and can be addressed while merging w/o resending a new 
revision, so:

Reviewed-by: Denys Dmytriyenko <[email protected]>


> > ---
> >  .../classes/kernel-fitimage-ti-u-boot.bbclass | 214 ++++++++++++++++++
> >  .../linux/linux-ti-staging_5.10.bb            |   2 +
> >  2 files changed, 216 insertions(+)
> >  create mode 100644 meta-ti-bsp/classes/kernel-fitimage-ti-u-boot.bbclass
> > 
> > diff --git a/meta-ti-bsp/classes/kernel-fitimage-ti-u-boot.bbclass 
> > b/meta-ti-bsp/classes/kernel-fitimage-ti-u-boot.bbclass
> > new file mode 100644
> > index 00000000..503c6d25
> > --- /dev/null
> > +++ b/meta-ti-bsp/classes/kernel-fitimage-ti-u-boot.bbclass
> > @@ -0,0 +1,214 @@
> > +
> > +inherit ti-secdev
> > +
> > +# The TI u-boot requires that the kernel image is signed.  To not overload 
> > the
> > +# entire kernel-fitimage.bbclass from oe-core, we just overwrite one 
> > function
> > +# and do the signing in there.
> 
> I'm wondering how the inherit ordering is handled in this case and whether 
> there are any chances of a race - which fitimage_assemble will be used?
> 
> 
> > +#
> > +# Assemble fitImage
> > +#
> > +# $1 ... .its filename
> > +# $2 ... fitImage name
> > +# $3 ... include ramdisk
> > +fitimage_assemble() {
> > +   kernelcount=1
> > +   dtbcount=""
> > +   DTBS=""
> > +   ramdiskcount=$3
> > +   setupcount=""
> > +   bootscr_id=""
> > +   rm -f $1 arch/${ARCH}/boot/$2
> > +
> > +   if [ -n "${UBOOT_SIGN_IMG_KEYNAME}" -a "${UBOOT_SIGN_KEYNAME}" = 
> > "${UBOOT_SIGN_IMG_KEYNAME}" ]; then
> > +           bbfatal "Keys used to sign images and configuration nodes must 
> > be different."
> > +   fi
> 
> <snip>
> 
> 
> > +}
> > +
> > +fitimage_ti_secure() {
> > +   if test -n "${TI_SECURE_DEV_PKG}"; then
> > +           export TI_SECURE_DEV_PKG=${TI_SECURE_DEV_PKG}
> > +           ${TI_SECURE_DEV_PKG}/scripts/secure-binary-image.sh $1 $2
> > +   else
> > +           cp $1 $2
> > +   fi
> > +}
> > +
> > diff --git a/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging_5.10.bb 
> > b/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging_5.10.bb
> > index cc67188a..f3793baf 100644
> > --- a/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging_5.10.bb
> > +++ b/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging_5.10.bb
> > @@ -3,6 +3,8 @@ SUMMARY = "Linux kernel for TI devices"
> >  LICENSE = "GPL-2.0-only"
> >  LIC_FILES_CHKSUM = "file://COPYING;md5=6bc538ed5bd9a7fc9398086aedcd7e46"
> >  
> > +KERNEL_CLASSES += "${@bb.utils.contains('TFA_PLATFORM', 'k3', 
> > 'kernel-fitimage-ti-u-boot', '', d)}"
> 
> "contains" does a substring search, a bit faster to use "conditional" here:
> 
> KERNEL_CLASSES += "${@oe.utils.cconditional('TFA_PLATFORM', 'k3', 
> 'kernel-fitimage-ti-u-boot', '', d)}"
> 
> or even a simple Python if-else directly:
> 
> KERNEL_CLASSES += "${@ 'kernel-fitimage-ti-u-boot' if 
> d.getVar('TFA_PLATFORM') == 'k3' else ''}"
> 
> 
> > +
> >  inherit kernel
> >  
> >  DEFCONFIG_BUILDER = "${S}/ti_config_fragments/defconfig_builder.sh"
> > -- 
> > 2.17.1
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