[PATCH v2] configs: KASLR OPTEE RNG support for K3 devices
Bryan Brattlof
bb at ti.com
Fri Jul 11 14:17:41 CEST 2025
On July 11, 2025 thus sayeth Gokul Praveen:
> Hi Bryan,
>
> On 10/07/25 19:47, Bryan Brattlof wrote:
> > On July 10, 2025 thus sayeth Gokul:
> > > From: Gokul Praveen <g-praveen at ti.com>
> > >
> > > KASLR, or Kernel Address Space Layout Randomization, is a security
> > > feature in the Linux kernel that randomizes the memory location
> > > where the kernel is loaded during boot.
> > >
> > > OP-TEE RNG is a Random Number Generator (RNG) component within the
> > > Open Portable Trusted Execution Environment (OP-TEE) which provides
> > > a random number to U-BOOT and U-BOOT provides this random number
> > > as seed value to the LINUX kernel for KASLR.
> > >
> > > Add KASLR OPTEE RNG support across K3 devices by enabling the required
> > > configs.
> > >
> > > Signed-off-by: Gokul Praveen <g-praveen at ti.com>
> > > ---
> > > v2<==> v1
> > > ===========
> > > * Added 'if' condition for configs to avoid enabling this feature
> > > in R5.
> >
> > Works for me.
> >
> > Reviewed-by: Bryan Brattlof <bb at ti.com>
> >
> > >
> > > Boot logs Link :
> > >
> > > https://gist.github.com/GokulPraveen2001/44aa8c0962438c12ffc55e6ed67742e5
> >
> > Just curious are you enabling the kaslrseed command for this build? It
> > looks like you're using TI's evil vendor scripts but I assumed the
> > kaslrseed command was disabled.
>
> Can you elaborate more on this,Bryan?
>
> Actually, we are not using the kaslrseed device tree property. Is that what
> you meant,Bryan?
Everything in this boot log is tagged as dirty. So I'm just trying to
ensure I've got everything setup correctly.
I was curious what you are doing to generate the line:
KASLR SEED OPTEE SET SUCCESSFULLY
before we jump to the kernel.
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