[LTP] [PATCH 2/2] ima_kexec.sh: Document kernel config dependencies

[Petr Vorel]

Hi Mimi, all,

> On Wed, 2026-01-07 at 16:57 +0100, Petr Vorel wrote:
> > CONFIG_HAVE_IMA_KEXEC=y is enough for test, ie. test is working with:

> >     # CONFIG_IMA_KEXEC is not set
> >     CONFIG_HAVE_IMA_KEXEC=y

> > Probably obvious as CONFIG_HAVE_IMA_KEXEC is arch specific and
> > CONFIG_IMA_KEXEC is "TPM PCRs are only reset on a hard reboot."
> > and ima_kexec.c requires CONFIG_HAVE_IMA_KEXEC (only parts are skipped
> > when CONFIG_IMA_KEXEC not set) but better to clarify for users.

> > Signed-off-by: Petr Vorel <pvorel@suse.cz>
> > ---
> >  testcases/kernel/security/integrity/ima/tests/ima_kexec.sh | 3 +++
> >  1 file changed, 3 insertions(+)

> > diff --git a/testcases/kernel/security/integrity/ima/tests/ima_kexec.sh b/testcases/kernel/security/integrity/ima/tests/ima_kexec.sh
> > index 7688690af2..de595fcdd7 100755
> > --- a/testcases/kernel/security/integrity/ima/tests/ima_kexec.sh
> > +++ b/testcases/kernel/security/integrity/ima/tests/ima_kexec.sh
> > @@ -6,8 +6,11 @@

> >  # Verify that kexec cmdline is measured correctly.
> >  # Test attempts to kexec the existing running kernel image.
> > +#
> >  # To kexec a different kernel image export IMA_KEXEC_IMAGE=<pathname>.
> >  # Test requires example IMA policy loadable with LTP_IMA_LOAD_POLICY=1.
> > +#
> > +# Test requires CONFIG_HAVE_IMA_KEXEC=y (CONFIG_IMA_KEXEC is not mandatory).

> Correct.  The test verifies that the kernel image is measured.  It does not
> execute the kexec, so there is no need for carrying the IMA measurement list
> across kexec (CONFIG_IMA_KEXEC).

Thanks for having a look! I merged with your RBT (as we dicussed).

Kind regards,
Petr

> >  TST_NEEDS_CMDS="grep kexec sed"
> >  TST_CNT=3