From: Marek Vasut Date: Thu, 12 Jan 2023 17:58:39 +0000 (+0100) Subject: ARM: stm32: Fix ECDSA authentication with Dcache enabled X-Git-Url: http://git.dujemihanovic.xyz/img/static/git-logo.png?a=commitdiff_plain;h=bbafbc044dcab06eccba0dc6a7235a0c6e782484;p=u-boot.git ARM: stm32: Fix ECDSA authentication with Dcache enabled 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. Reviewed-by: Patrice Chotard Reviewed-by: Patrick Delaunay Signed-off-by: Marek Vasut --- diff --git a/arch/arm/mach-stm32mp/ecdsa_romapi.c b/arch/arm/mach-stm32mp/ecdsa_romapi.c index a2f63ff879..6156526253 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;