From: Suman Anna s-anna@ti.com
[ Upstream commit 9afeefcf06fc7b4bdab06a6e2cb06745bded34dd ]
The K3 PRUs are 32-bit processors and in general have some limitations in using the standard ARMv8 memcpy function for loading firmware segments, so the driver already uses a custom memcpy implementation. This added logic however is limited to only IRAMs at the moment, but the loading into Data RAMs is not completely ok either and does generate a kernel crash for unaligned accesses.
Fix these crashes by removing the existing IRAM logic limitation and extending the custom memcpy usage to Data RAMs as well for all K3 SoCs.
Fixes: 1d39f4d19921 ("remoteproc: pru: Add support for various PRU cores on K3 AM65x SoCs") Signed-off-by: Suman Anna s-anna@ti.com Link: https://lore.kernel.org/r/20210315205859.19590-1-s-anna@ti.com Signed-off-by: Bjorn Andersson bjorn.andersson@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/remoteproc/pru_rproc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/remoteproc/pru_rproc.c b/drivers/remoteproc/pru_rproc.c index 2667919d76b3..16979c1cd2f4 100644 --- a/drivers/remoteproc/pru_rproc.c +++ b/drivers/remoteproc/pru_rproc.c @@ -585,7 +585,7 @@ pru_rproc_load_elf_segments(struct rproc *rproc, const struct firmware *fw) break; }
- if (pru->data->is_k3 && is_iram) { + if (pru->data->is_k3) { ret = pru_rproc_memcpy(ptr, elf_data + phdr->p_offset, filesz); if (ret) {