[U-Boot] [PATCH] apalis_imx6: allocate specific region of memory to OP-TEE

[Igor Opaniuk]

Hi Ricardo,

On Tue, Sep 3, 2019 at 4:53 PM Ricardo Salveti <ricardo at foundries.io> wrote:
>
> On Tue, Sep 3, 2019 at 12:09 AM Peng Fan <peng.fan at nxp.com> wrote:
> >
> > > Subject: [PATCH] apalis_imx6: allocate specific region of memory to OP-TEE
> > >
> > > OP-TEE uses the memory region defined by the maximum DRAM address
> > > minus CONFIG_OPTEE_TZDRAM_SIZE, so subtract
> > > CONFIG_OPTEE_TZDRAM_SIZE from the available DRAM size to avoid
> > > conflicts.
> > >
> > > Signed-off-by: Ricardo Salveti <ricardo at foundries.io>
> > > ---
> > >  board/toradex/apalis_imx6/apalis_imx6.c | 5 +++++
> > >  1 file changed, 5 insertions(+)
> > >
> > > diff --git a/board/toradex/apalis_imx6/apalis_imx6.c
> > > b/board/toradex/apalis_imx6/apalis_imx6.c
> > > index 6421a22c25..fa7fcc8d46 100644
> > > --- a/board/toradex/apalis_imx6/apalis_imx6.c
> > > +++ b/board/toradex/apalis_imx6/apalis_imx6.c
> > > @@ -75,6 +75,11 @@ int dram_init(void)
> > >       gd->ram_size = get_ram_size((void *)CONFIG_SYS_SDRAM_BASE,
> > >                                   (ulong)imx_ddr_size());
> > >
> > > +     /* Subtract the defined OPTEE runtime firmware length */ #ifdef
> > > +CONFIG_OPTEE_TZDRAM_SIZE
> > > +     gd->ram_size -= CONFIG_OPTEE_TZDRAM_SIZE; #endif
> > > +
> >
> > Has OPTEE been enabled? I not see that in defconfig.
>
> Not yet enable by default, this is just to make it compatible with OP-TEE.
>
> Should we have it enabled by default at apalis_imx6_defconfig? I could
> also send another patch to add a new config that has secure boot and
> OP-TEE enabled by default, as done with a few other imx targets.

IMHO, idea with a new config makes sense, as besides CONFIG_BOOTM_OPTEE=y
we should also add CONFIG_ARMV7_BOOT_SEC_DEFAULT=y  and provide
appropriate CONFIG_BOOTCOMMAND to boot TEE blob (although we're currently
in the middle of transition to distroboot usage by default, where we
can handle all this
in a boot script instead).

>
> Thanks,
> --
> Ricardo Salveti
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Thanks

-- 
Best regards - Freundliche Grüsse - Meilleures salutations

Igor Opaniuk

mailto: igor.opaniuk at gmail.com
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