Re: [PATCH v4] ARM: i.MX8M: smccc: allow SIP_BUILDINFO call on all imx8m variants

[Sascha Hauer <sha@pengutronix.de>]

On Thu, Jan 12, 2023 at 01:57:27PM +0000, SCHNEIDER Johannes wrote:
> Hoi,
> 
> reasoning is that the common config switch limits the codeblock to
> imx8m boards only... or at least was, since on second thought: this is
> inside imx8m.c... so the previous version with current_el might be
> better? preferences? :-)

I like the current_el() approach better. As you said imx8m_init() is
called on i.MX8M only anyway, so no need to limit execution to i.MX8M.
Also just having CONFIG_FIRMWARE_IMX8MQ_ATF enabled doesn't necessarily
mean that the board code has actually loaded the TF-A binary. Using
current_el() gracefuly handles this case as well.

Sascha

> 
> regards
> 
> ________________________________________
> From: Ahmad Fatoum <a.fatoum@pengutronix.de>
> Sent: Thursday, January 12, 2023 13:56
> To: SCHNEIDER Johannes; barebox@lists.infradead.org
> Subject: Re: [PATCH v4] ARM: i.MX8M: smccc: allow SIP_BUILDINFO call on all imx8m variants
> 
> This email is not from Hexagon’s Office 365 instance. Please be careful while clicking links, opening attachments, or replying to this email.
> 
> 
> Hello Johannes,
> 
> On 12.01.23 09:15, Johannes Schneider wrote:
> > By adding a common config switch, the imx8m_init code becomes generic
> > for all board variants (and slightly less confusing).
> >
> > Signed-off-by: Johannes Schneider <johannes.schneider@leica-geosystems.com>
> >
> > ---
> > v4: add missing common switch
> >
> > v3: redid patch with suggested common config switch
> 
> I am fine with either current_el() check or what you do here,
> but given that you switched between them in revisions, I am
> curious what the reasoning is.
> 
> Cheers,
> Ahmad
> 
> >
> > v2: was:
> > [PATCH v2 1/1] ARM: i.MX8M: smccc: fix firmware_atf check
> >
> > v1: or'ed all IS_ENABLED(FIRMWARE_IMX8M[mnpq]_ATF
> > ---
> >  arch/arm/mach-imx/imx8m.c | 2 +-
> >  firmware/Kconfig          | 7 +++++++
> >  2 files changed, 8 insertions(+), 1 deletion(-)
> >
> > diff --git a/arch/arm/mach-imx/imx8m.c b/arch/arm/mach-imx/imx8m.c
> > index 9758525b54..4399dc7dd5 100644
> > --- a/arch/arm/mach-imx/imx8m.c
> > +++ b/arch/arm/mach-imx/imx8m.c
> > @@ -61,7 +61,7 @@ static int imx8m_init(const char *cputypestr)
> >       pr_info("%s unique ID: %llx\n", cputypestr, imx8m_uid());
> >
> >       if (IS_ENABLED(CONFIG_ARM_SMCCC) &&
> > -         IS_ENABLED(CONFIG_FIRMWARE_IMX8MQ_ATF)) {
> > +         IS_ENABLED(CONFIG_FIRMWARE_IMX8M_ATF)) {
> >               arm_smccc_smc(IMX_SIP_BUILDINFO,
> >                             IMX_SIP_BUILDINFO_GET_COMMITHASH,
> >                             0, 0, 0, 0, 0, 0, &res);
> > diff --git a/firmware/Kconfig b/firmware/Kconfig
> > index b4a6fd9137..09ad85c539 100644
> > --- a/firmware/Kconfig
> > +++ b/firmware/Kconfig
> > @@ -12,17 +12,24 @@ config FIRMWARE_IMX_LPDDR4_PMU_TRAIN
> >  config FIRMWARE_IMX_DDR4_PMU_TRAIN
> >               bool
> >
> > +config FIRMWARE_IMX8M_ATF
> > +     bool
> > +
> >  config FIRMWARE_IMX8MM_ATF
> >          bool
> > +     select FIRMWARE_IMX8M_ATF
> 
> Your whitespacing are ok, but I see now that the file has
> a mix of whitespace and tabs. I just sent out a patch for
> this.
> 
> Cheers,
> Ahmad
> 
> >
> >  config FIRMWARE_IMX8MN_ATF
> >          bool
> > +     select FIRMWARE_IMX8M_ATF
> >
> >  config FIRMWARE_IMX8MP_ATF
> >          bool
> > +     select FIRMWARE_IMX8M_ATF
> >
> >  config FIRMWARE_IMX8MQ_ATF
> >          bool
> > +     select FIRMWARE_IMX8M_ATF
> >
> >  config FIRMWARE_CCBV2_OPTEE
> >       bool
> 
> --
> Pengutronix e.K.                           |                             |
> Steuerwalder Str. 21                       | https://eur02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.pengutronix.de%2F&data=05%7C01%7C%7C70cd0fd76baf40bfb3f208daf49c74d9%7C1b16ab3eb8f64fe39f3e2db7fe549f6a%7C0%7C0%7C638091250067510526%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=%2B6RznkD0xTQ5Z%2BWuYN4NC4pvjVbFIMRaffz90gnyh3s%3D&reserved=0  |
> 31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
> Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |
> 
> 
> 

-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |