Hi Sibi, On Tue, Jan 17, 2023 at 02:28:29PM +0530, Sibi Sankar wrote: > The memory region allocated using dma_alloc_attr with no kernel mapping > attribute set would still be a part of the linear kernel map. Any access > to this region by the application processor after assigning it to the > remote Q6 will result in a XPU violation. Fix this by replacing the > dynamically allocated memory region with a no-map carveout and unmap the > modem metadata memory region before passing control to the remote Q6. > The addition of the carveout and memunmap is required only on SoCs that > mandate memory protection before transferring control to Q6, hence the > driver falls back to dynamic memory allocation in the absence of the > modem metadata carveout. [...] > remoteproc: qcom_q6v5_mss: Use a carveout to authenticate modem > headers With this change now merged, am I ok to downgrade the arm64 arch_dma_prep_coherent() back to a clean? Thanks, Will
