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<bl4ckb0ne>
lynxeye: what's the role of MMUv2_PTE_EXCEPTION? I see that the vivante driver doesn't always enable it
<bl4ckb0ne>
I get a different mmu error when disabling it in `etnaviv_iommuv2_ensure_stlb`
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<lynxeye>
bl4ckb0ne: The exception bit tells the MMU to raise a fault when the page isn't present. Without the exception bit the access will succeed from the requestor perspective, but will be retargeted to a dummy location.
<bl4ckb0ne>
so thats why we get a page not present on fault
<bl4ckb0ne>
i removed the `memset` call in the func and got a `slave not present` this time on 0xDF282400
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<bl4ckb0ne>
so that addr is a dummy location? ive been looking for it, its persistant across reboots so it might be an offset
<lynxeye>
bl4ckb0ne: The dummy location is the *SAFE_ADDR* programmed in etnaviv_iommu_v2.c
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<bl4ckb0ne>
bad_page_dma?
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