How to mmap/unmmap in guest VM when enabled optee virtualization?

[myspark104]

Dear all,

I have already enabled the OP-TEE virtualization feature with CFG_VIRTUALIZATION=y in OP-TEE 3.18 on the device.
Now I use the core_mmu_add_mapping()/core_mmu_remove_mapping() to mmap/unmmap in optee guest VM. It used ok when mapping the PA, but it will panic when unmmap the matched VA.

E/TC:1 ? 0 tee_unmmap_region:70 core_mmu_remove_mapping() failed: 0xffff0000, va(0x71800000), size(0x1000)
D/TC:1 ? 0 tee_ta_invoke_command:916 Error: 8 of 4
D/TC:1 ? 0 check_pa_matches_va:2150 va 0x71a00000 unmapped, expect 0x1a6000000
E/TC:1 7 0 Panic at core/mm/core_mmu.c:2151 <check_pa_matches_va>
E/TC:1 7 0 TEE load address @ 0x71000000
E/TC:1 7 0 Call stack:
E/TC:1 7 0  0x71008988
E/TC:1 7 0  0x71014450
E/TC:1 7 0  0x7101e114

I found it only updates the global static_memory_map when calling core_mmu_add_mapping(), but the memory mmap table of guest VM is a new memory and copy from static_memory_map when creating guest VM, it doesn't update the memory mmap table of guest VM, so it can't find PA through the matched VA. Does it provide other APIs to mmap/unmmap in guest VM?

Thank you for your help!

[jenswi-linaro]

The code doesn't support unmapping with virtualization enabled after exiting to the normal world for the first time. We'll need to add support for that at some point.