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Merge branch 'feature/extmem_alloc_for_s2_v4.2' into 'release/v4.2'

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External memory allocation policy support  for ESP32-S2 (GitHub PR) (v4.2)

See merge request espressif/esp-idf!13620
This commit is contained in:
Jiang Jiang Jian
2021-05-26 03:43:13 +00:00
parent b860069c10 06bf491f13
commit 841aca897c
1 changed files with 7 additions and 2 deletions
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9
components/mbedtls/Kconfig
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@ -15,17 +15,22 @@ menu "mbedTLS"
mbedtls_platform_set_calloc_free() function
- Internal IRAM memory wherever applicable else internal DRAM
Recommended mode here is always internal, since that is most preferred
Recommended mode here is always internal (*), since that is most preferred
from security perspective. But if application requirement does not
allow sufficient free internal memory then alternate mode can be
selected.
(*) In case of ESP32-S2, hardware allows encryption of external
SPIRAM contents provided hardware flash encryption feature is enabled.
In that case, using external SPIRAM allocation strategy is also safe choice
from security perspective.
config MBEDTLS_INTERNAL_MEM_ALLOC
bool "Internal memory"
config MBEDTLS_EXTERNAL_MEM_ALLOC
bool "External SPIRAM"
depends on ESP32_SPIRAM_SUPPORT
depends on SPIRAM_USE_CAPS_ALLOC || SPIRAM_USE_MALLOC
config MBEDTLS_DEFAULT_MEM_ALLOC
bool "Default alloc mode"