On Fri, Apr 20, 2018 at 11:10:17PM +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@xxxxxxxxxxx>
> ---
> 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..ddc439f6269b 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_cntvoff_init(void)
> +{
> +#ifdef CONFIG_SMP
> + secure_cntvoff_init();
> +#endif
> +}
> +
> +static const char * const sun8i_cntvoff_board_dt_compat[] = {
> + "allwinner,sun8i-a83t",
> + NULL,
> +};
> +
> +DT_MACHINE_START(SUN8I_CNTVOFF_DT, "Allwinner sun8i-a83t board")
This name still doesn't really make much sense. It's an A83t, that's
it.
Apart from the other minor comment I had, and once that name has been
fixed:
Acked-by: Maxime Ripard <maxime.ripard@xxxxxxxxxxx>
Maxime
--
Maxime Ripard, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com
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