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

[Marco Felsch]

On 24-01-11, Ahmad Fatoum wrote:
> 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.

Argh.. I used the most recent version which is 2023.12.0 for this
development. Shall I rebase it on next or on master?

Regards,
  Marco


> 
> > ---
> >  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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