On Wed, Apr 30, 2025 at 07:27:50PM +0530, Anshul Dalal wrote: > As discussed here[1], the go command causes undefined behavior when used > for running custom OSes since the icache might hold outdated data. OSes > usually also expect the MMU to be disabled upon execution. > > Therefore this patch adds a call to cleanup_before_linux before we jump > to the loaded program/os which disables both the caches and the MMU. > This makes the go command's behavior consistent with riscv platforms. > > NOTE: This might cause regressions with users expecting a configured MMU > but I'm unsure if it's a supported use case for the go command anyway. > > [1]: https://lore.kernel.org/u-boot/d9dxl95mtq8i.3euy0c6m2l...@ti.com/ > > Signed-off-by: Anshul Dalal <ansh...@ti.com>
This is the inverse of what needs to be done, sorry. RISC-V shouldn't be doing this type of cleanup. I know it sounds reductive but "go means go". We have all of the other bootX commands for "prepare the system and boot the thing at $address". -- Tom
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