Re: [PATCH v8 07/12] ARM: sunxi: Add initialization of CNTVOFF

Mylène Josserand
2018-05-02T13:28:37Z

Hi Maxime,

On Wed, 2 May 2018 15:08:42 +0200
Maxime Ripard <maxime.ripard@bootlin.com> wrote:

> On Tue, May 01, 2018 at 02:31:26PM +0200, Mylène Josserand wrote:
> > Add the initialization of CNTVOFF for sun8i-a83t.
> >
> > For boot CPU, create a new machine that handles this
> > function's call in an "init_early" callback. We need to initialize
> > CNTVOFF before the arch timer's initialization otherwise, it will
> > not be taken into account and fails to boot correctly.
> > Because of that, this function can't be called in SMP's early_initcall
> > function which is called after timer's init.
> >
> > For secondary CPUs, add this function into secondary_startup
> > assembly entry.
> >
> > Signed-off-by: Mylène Josserand <mylene.josserand@bootlin.com>
> > Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
> > ---
> > arch/arm/mach-sunxi/headsmp.S | 1 +
> > arch/arm/mach-sunxi/sunxi.c | 20 +++++++++++++++++++-
> > 2 files changed, 20 insertions(+), 1 deletion(-)
> >
> > diff --git a/arch/arm/mach-sunxi/headsmp.S b/arch/arm/mach-sunxi/headsmp.S
> > index 37dc772701f3..32d76be98541 100644
> > --- a/arch/arm/mach-sunxi/headsmp.S
> > +++ b/arch/arm/mach-sunxi/headsmp.S
> > @@ -71,6 +71,7 @@ ENDPROC(sunxi_mc_smp_cluster_cache_enable)
> >
> > ENTRY(sunxi_mc_smp_secondary_startup)
> > bl sunxi_mc_smp_cluster_cache_enable
> > + bl secure_cntvoff_init
> > b secondary_startup
> > ENDPROC(sunxi_mc_smp_secondary_startup)
> >
> > diff --git a/arch/arm/mach-sunxi/sunxi.c b/arch/arm/mach-sunxi/sunxi.c
> > index 5e9602ce1573..2770a31a9278 100644
> > --- a/arch/arm/mach-sunxi/sunxi.c
> > +++ b/arch/arm/mach-sunxi/sunxi.c
> > @@ -16,6 +16,7 @@
> > #include <linux/platform_device.h>
> >
> > #include <asm/mach/arch.h>
> > +#include <asm/secure_cntvoff.h>
> >
> > static const char * const sunxi_board_dt_compat[] = {
> > "allwinner,sun4i-a10",
> > @@ -62,7 +63,6 @@ MACHINE_END
> > static const char * const sun8i_board_dt_compat[] = {
> > "allwinner,sun8i-a23",
> > "allwinner,sun8i-a33",
> > - "allwinner,sun8i-a83t",
> > "allwinner,sun8i-h2-plus",
> > "allwinner,sun8i-h3",
> > "allwinner,sun8i-r40",
> > @@ -75,6 +75,24 @@ DT_MACHINE_START(SUN8I_DT, "Allwinner sun8i Family")
> > .dt_compat = sun8i_board_dt_compat,
> > MACHINE_END
> >
> > +void __init sun8i_a83t_cntvoff_init(void)
> > +{
> > +#ifdef CONFIG_SMP
> > + secure_cntvoff_init();
> > +#endif
> > +}
> > +
> > +static const char * const sun8i_a83t_cntvoff_board_dt_compat[] = {
> > + "allwinner,sun8i-a83t",
> > + NULL,
> > +};
> > +
> > +DT_MACHINE_START(SUN8I_CNTVOFF_DT, "Allwinner sun8i-a83t board")
>
> I put my Acked-by on the condition that you would fix this. And you
> still didn't.

Grrr, stupid me.
I modified the names of functions but I forgot the machine. Sorry
about that.

Best regards,

--
Mylène Josserand, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering