ACPI: usage of sandbox virtual addresses

[Heinrich Schuchardt]

On 12/26/23 10:50, Simon Glass wrote:
> Hi Heinrich,
>
> On Tue, Dec 26, 2023 at 8:56 AM Heinrich Schuchardt <xypron.glpk at gmx.de> wrote:
>>
>> Hello Simon,
>>
>> currently we use sandbox virtual addresses in all ACPI tables. This
>> means that an application started by the U-Boot sandbox consuming these
>> tables will crash due to accessing invalid addresses.
>>
>> Shouldn't the ACPI tables be migrated to use valid pointers?
>
> The confusion arises due to the difference between addresses and
> pointers. If we store addresses in the ACPI tables, then things should
> work.
>
> My approach has been to avoid using casts, but instead use
> map_sysmem() and mem_to_sysmem().
>
> Which particular piece of code is wrong in this case?

Tables DSDT, XSDT, RSDP, FADT in the sandbox contain sandbox virtual
addresses instead of pointers to real host memory.

All code referring to these tables should be changed.

Best regards

Heinrich