[PATCH 12/18] ARM64: mmu: add dynamic optee memory mapping support

[Ahmad Fatoum]

On 11.01.24 12:48, Marco Felsch wrote:
> Use the dynamic optee memory base address for the early mapping if
> possible and fallback to the static mapping if the query failed.
> 
> Signed-off-by: Marco Felsch <m.felsch at pengutronix.de>

This patch fails to apply on next.

> ---
>  arch/arm/cpu/mmu_64.c      | 14 ++++++++++++--
>  arch/arm/mach-imx/esdctl.c |  4 ++++
>  common/Makefile            |  2 +-
>  3 files changed, 17 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/arm/cpu/mmu_64.c b/arch/arm/cpu/mmu_64.c
> index c6ea63e655ad..69fd2218c1fc 100644
> --- a/arch/arm/cpu/mmu_64.c
> +++ b/arch/arm/cpu/mmu_64.c
> @@ -20,6 +20,7 @@
>  #include <memory.h>
>  #include <asm/system_info.h>
>  #include <linux/pagemap.h>
> +#include <tee/optee.h>
>  
>  #include "mmu_64.h"
>  
> @@ -297,6 +298,7 @@ void dma_flush_range(void *ptr, size_t size)
>  void mmu_early_enable(unsigned long membase, unsigned long memsize)
>  {
>  	int el;
> +	u64 optee_membase;
>  	unsigned long ttb = arm_mem_ttb(membase + memsize);
>  
>  	pr_debug("enabling MMU, ttb @ 0x%08lx\n", ttb);
> @@ -309,8 +311,16 @@ void mmu_early_enable(unsigned long membase, unsigned long memsize)
>  	memset((void *)ttb, 0, GRANULE_SIZE);
>  
>  	early_remap_range(0, 1UL << (BITS_PER_VA - 1), MAP_UNCACHED);
> -	early_remap_range(membase, memsize - OPTEE_SIZE, MAP_CACHED);
> -	early_remap_range(membase + memsize - OPTEE_SIZE, OPTEE_SIZE, MAP_FAULT);
> +
> +	if (optee_get_membase(&optee_membase)) {
> +		/* Fallback and place OP-TEE at the memory end region */
> +		early_remap_range(membase, memsize - OPTEE_SIZE, MAP_CACHED);
> +		early_remap_range(membase + memsize - OPTEE_SIZE, OPTEE_SIZE, MAP_FAULT);
> +	} else {
> +		early_remap_range(membase, memsize, MAP_CACHED);
> +		early_remap_range(optee_membase, OPTEE_SIZE, MAP_FAULT);
> +	}
> +
>  	early_remap_range(PAGE_ALIGN_DOWN((uintptr_t)_stext), PAGE_ALIGN(_etext - _stext), MAP_CACHED);
>  
>  	mmu_enable();
> diff --git a/arch/arm/mach-imx/esdctl.c b/arch/arm/mach-imx/esdctl.c
> index ac35a2de66f1..47c43d75ec75 100644
> --- a/arch/arm/mach-imx/esdctl.c
> +++ b/arch/arm/mach-imx/esdctl.c
> @@ -29,6 +29,8 @@
>  #include <mach/imx/imx8m-regs.h>
>  #include <mach/imx/imx7-regs.h>
>  #include <mach/imx/imx9-regs.h>
> +#include <mach/imx/scratch.h>
> +#include <tee/optee.h>
>  
>  struct imx_esdctl_data {
>  	unsigned long base0;
> @@ -1004,6 +1006,8 @@ resource_size_t imx8m_barebox_earlymem_size(unsigned buswidth)
>  
>  static void __noreturn imx8m_barebox_entry(void *boarddata, unsigned buswidth)
>  {
> +	imx8m_init_scratch_space(buswidth, false);
> +	optee_set_membase(imx8m_scratch_get_optee_hdr());
>  	barebox_arm_entry(MX8M_DDR_CSD1_BASE_ADDR,
>  			  imx8m_barebox_earlymem_size(buswidth), boarddata);
>  }
> diff --git a/common/Makefile b/common/Makefile
> index 7fb864f61480..c31cbab9e48f 100644
> --- a/common/Makefile
> +++ b/common/Makefile
> @@ -80,7 +80,7 @@ obj-$(CONFIG_BAREBOX_UPDATE_IMX_NAND_FCB) += imx-bbu-nand-fcb.o
>  obj-$(CONFIG_BOOT)		+= boot.o
>  obj-$(CONFIG_SERIAL_DEV_BUS)	+= serdev.o
>  obj-$(CONFIG_USBGADGET_START)	+= usbgadget.o
> -pbl-$(CONFIG_PBL_OPTEE)		+= optee.o
> +obj-pbl-$(CONFIG_PBL_OPTEE)	+= optee.o
>  obj-$(CONFIG_BOOTM_OPTEE)	+= optee.o
>  obj-$(CONFIG_FASTBOOT_BASE)	+= fastboot.o
>  

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