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feat(imx8mm): restrict peripheral access to secure world

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This restricts and locks all security relevant peripherals to only be
changeable by the secure world. Otherwise the normal world can simply
change the access settings and defeat all security measures put in
place.

Change-Id: I484a2c8164e58b68256d829470e00d5ec473e266
Signed-off-by: Stefan Kerkmann <s.kerkmann@pengutronix.de>
This commit is contained in:
Stefan Kerkmann 2024-03-04 12:00:57 +01:00
parent f4b11e59b8
commit 1156c76361
1 changed files with 3 additions and 1 deletions
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4
plat/imx/imx8m/imx8mm/imx8mm_bl31_setup.c
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@ -77,7 +77,9 @@ static const struct imx_rdc_cfg rdc[] = {
static const struct imx_csu_cfg csu_cfg[] = {
/* peripherals csl setting */
CSU_CSLx(0x1, CSU_SEC_LEVEL_0, UNLOCKED),
CSU_CSLx(CSU_CSL_RDC, CSU_SEC_LEVEL_3, LOCKED),
CSU_CSLx(CSU_CSL_TZASC, CSU_SEC_LEVEL_5, LOCKED),
CSU_CSLx(CSU_CSL_CSU, CSU_SEC_LEVEL_5, LOCKED),
/* master HP0~1 */