[PATCH next] arm: mach-k3: use Kconfig options for ATF/OPTEE size

[Dhruva Gole]

On Mar 10, 2026 at 14:36:27 +0530, Anshul Dalal wrote:
> The reserved memory sizes for ATF and OPTEE were hard-coded for K3
> devices, this patch replaces them with a Kconfig option allowing for
> easier modifications.
> 
> Signed-off-by: Anshul Dalal <anshuld at ti.com>
> ---

Looks good to me in general,

Reviewed-by: Dhruva Gole <d-gole at ti.com>

>  arch/arm/dts/k3-binman.dtsi   |  4 ++--
>  arch/arm/mach-k3/Kconfig      | 15 +++++++++++++++
>  arch/arm/mach-k3/common_fdt.c |  5 +++--
>  3 files changed, 20 insertions(+), 4 deletions(-)
> 
> diff --git a/arch/arm/dts/k3-binman.dtsi b/arch/arm/dts/k3-binman.dtsi
> index 0fd93f9536a..ad127663d03 100644
> --- a/arch/arm/dts/k3-binman.dtsi
> +++ b/arch/arm/dts/k3-binman.dtsi
> @@ -477,7 +477,7 @@
>  						FWPERM_SECURE_PRIV_RWCD |
>  						FWPERM_SECURE_USER_RWCD)>;
>  		start_address = <0x0 CONFIG_K3_ATF_LOAD_ADDR>;
> -		end_address = <0x0 (CONFIG_K3_ATF_LOAD_ADDR + 0x1ffff)>;
> +		end_address = <0x0 (CONFIG_K3_ATF_LOAD_ADDR + CONFIG_K3_ATF_RESERVED_SIZE - 1)>;
>  	};
>  	firewall_armv8_optee_fg: template-8 {
>  		control = <(FWCTRL_EN | FWCTRL_LOCK |
> @@ -486,7 +486,7 @@
>  						FWPERM_SECURE_PRIV_RWCD |
>  						FWPERM_SECURE_USER_RWCD)>;
>  		start_address = <0x0 CONFIG_K3_OPTEE_LOAD_ADDR>;
> -		end_address = <0x0 (CONFIG_K3_OPTEE_LOAD_ADDR + 0x17fffff)>;
> +		end_address = <0x0 (CONFIG_K3_OPTEE_LOAD_ADDR + CONFIG_K3_OPTEE_RESERVED_SIZE - 1)>;
>  	};
>  
>  	ti_falcon_template: template-9 {
> diff --git a/arch/arm/mach-k3/Kconfig b/arch/arm/mach-k3/Kconfig
> index 1b8c0b1eb96..ba1130a7996 100644
> --- a/arch/arm/mach-k3/Kconfig
> +++ b/arch/arm/mach-k3/Kconfig
> @@ -130,6 +130,14 @@ config K3_ATF_LOAD_ADDR
>  	  The load address for the ATF image. This value is used to build the
>  	  FIT image header that places ATF in memory where it will run.
>  
> +config K3_ATF_RESERVED_SIZE
> +	hex "Reserved DDR size for ATF"
> +	default 0x80000 if (SOC_K3_AM625 || SOC_K3_AM62A7 || SOC_K3_AM62P5 || SOC_K3_J722S)
> +	default 0x20000
> +	help
> +	  The runtime DDR size reserved for ATF. This value is used to fixup the
> +	  kernel device-tree's reserved-memory node for ATF.
> +
>  config K3_OPTEE_LOAD_ADDR
>  	hex "Load address of OPTEE image"
>  	default 0x9e800000
> @@ -137,6 +145,13 @@ config K3_OPTEE_LOAD_ADDR
>  	  The load address for the OPTEE image. This value defaults to 0x9e800000
>  	  if not provided in the board defconfig file.
>  
> +config K3_OPTEE_RESERVED_SIZE
> +	hex "Reserved DDR size for OPTEE"
> +	default 0x1800000
> +	help
> +	  The runtime DDR size reserved for OPTEE. This value is used to fixup the
> +	  kernel device-tree's reserved-memory node for OPTEE.
> +
>  config K3_DM_FW
>  	bool "Separate DM firmware image"
>  	depends on CPU_V7R && !SOC_K3_AM642 && !SOC_K3_AM654 && !CLK_TI_SCI && !TI_SCI_POWER_DOMAIN
> diff --git a/arch/arm/mach-k3/common_fdt.c b/arch/arm/mach-k3/common_fdt.c
> index cb0fb8274a5..39cb00c3f43 100644
> --- a/arch/arm/mach-k3/common_fdt.c
> +++ b/arch/arm/mach-k3/common_fdt.c
> @@ -173,12 +173,13 @@ int fdt_fixup_reserved(void *blob)
>  	int ret;
>  
>  	ret = fdt_fixup_reserved_memory(blob, "tfa", CONFIG_K3_ATF_LOAD_ADDR,
> -					0x80000);
> +					CONFIG_K3_ATF_RESERVED_SIZE);
>  	if (ret)
>  		return ret;
>  
>  	return fdt_fixup_reserved_memory(blob, "optee",
> -					 CONFIG_K3_OPTEE_LOAD_ADDR, 0x1800000);
> +					 CONFIG_K3_OPTEE_LOAD_ADDR,
> +					 CONFIG_K3_OPTEE_RESERVED_SIZE);
>  }
>  
>  static int fdt_fixup_critical_trips(void *blob, int zoneoffset, int maxc)
> 
> ---
> base-commit: 1e240f7206fccde4ec73ea432ab8360d321c5fe5
> change-id: 20260310-tfa_tee_addr_kconfig_refactor-2bf77949df0f
> 
> Best regards,
> -- 
> Anshul Dalal <anshuld at ti.com>
> 

-- 
Best regards,
Dhruva Gole
Texas Instruments Incorporated