On 04.09.24 12:16, Siddharth Vadapalli wrote: > On Wed, Sep 04, 2024 at 12:00:11PM +0200, Jan Kiszka wrote: >> From: Jan Kiszka <jan.kiszka@xxxxxxxxxxx> >> >> The PVU on the AM65 SoC is capable of restricting DMA from PCIe devices >> to specific regions of host memory. Add the optional property >> "memory-regions" to point to such regions of memory when PVU is used. >> >> Since the PVU deals with system physical addresses, utilizing the PVU >> with PCIe devices also requires setting up the VMAP registers to map the >> Requester ID of the PCIe device to the CBA Virtual ID, which in turn is >> mapped to the system physical address. Hence, describe the VMAP >> registers which are optionally unless the PVU shall used for PCIe. > > The last line above seems to be accidentally modified when compared to > the one at: > https://lore.kernel.org/r/ada462d5-157a-4e11-ba25-d412a2bb678f@xxxxxx/ > "Hence, describe the VMAP registers which are optionally > configured whenever PVU is used for PCIe." > > If you intended to modify it, then the sentence appears distorted. > Yeah, I wanted to make the original sentence clearer but failed: "...which are optional unless the PVU shall be used for PCIe." Jan -- Siemens AG, Technology Linux Expert Center
