In case Dcache is enabled while the ECDSA authentication function is called via BootROM ROM API, the MMU tables are set up and the BootROM region is not marked as executable, so an attempt to run code from it results in a hang. Mark the BootROM region as executable as suggested by Patrick to prevent the hang.
Signed-off-by: Marek Vasut marex@denx.de --- Cc: Alexandru Gagniuc mr.nuke.me@gmail.com Cc: Patrice Chotard patrice.chotard@foss.st.com Cc: Patrick Delaunay patrick.delaunay@foss.st.com --- V2: - Initialize reenable_dcache variable V3: - Mark BootROM as executable instead --- arch/arm/mach-stm32mp/ecdsa_romapi.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/arch/arm/mach-stm32mp/ecdsa_romapi.c b/arch/arm/mach-stm32mp/ecdsa_romapi.c index a2f63ff879f..6156526253c 100644 --- a/arch/arm/mach-stm32mp/ecdsa_romapi.c +++ b/arch/arm/mach-stm32mp/ecdsa_romapi.c @@ -81,6 +81,10 @@ static int romapi_ecdsa_verify(struct udevice *dev, memcpy(raw_key + 32, pubkey->y, 32);
stm32mp_rom_get_ecdsa_functions(&rom); + + /* Mark BootROM region as executable. */ + mmu_set_region_dcache_behaviour(0, SZ_2M, DCACHE_DEFAULT_OPTION); + rom_ret = rom.ecdsa_verify_signature(hash, raw_key, signature, algo);
return rom_ret == ROM_API_SUCCESS ? 0 : -EPERM;