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memory: mtk-smi: Add enable IOMMU SMC command for MM master

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For concerns about security, the register to enable/disable IOMMU of
SMI LARB should only be configured in secure world. Thus, we add some
SMC command for multimedia master to enable/disable MM IOMMU in ATF by
setting the register of SMI LARB. This function is prepared for MT8188.

Signed-off-by: Chengci.Xu <chengci.xu@mediatek.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220817124608.10062-4-chengci.xu@mediatek.com
This commit is contained in:
Chengci.Xu 2022-08-17 20:46:07 +08:00 • committed by Krzysztof Kozlowski
parent 8c1561edc0
commit 4e508b259e
3 changed files with 26 additions and 0 deletions
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3
include/linux/soc/mediatek/mtk_sip_svc.h
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@ -22,4 +22,7 @@
ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, MTK_SIP_SMC_CONVENTION, \
ARM_SMCCC_OWNER_SIP, fn_id)
/* IOMMU related SMC call */
#define MTK_SIP_KERNEL_IOMMU_CONTROL MTK_SIP_SMC_CMD(0x514)
#endif