Hi Atish, On Fri, Dec 18, 2020 at 5:48 AM Atish Patra <atish.pa...@wdc.com> wrote: > > Currently, we place the DTB at 2MB from 4GB or end of DRAM which ever is > lesser. However, Linux kernel can address only 1GB of memory for RV32. > Thus, it can not map anything beyond 3GB (assuming 2GB is the starting > address). > As a result, it can not process DT and panic if opensbi dynamic firmware > is used. > > Fix this by placing the DTB at 2MB from 3GB or end of DRAM whichever is lower. > > Signed-off-by: Atish Patra <atish.pa...@wdc.com> > --- > hw/riscv/boot.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) >
With this patch, 32-bit sifive_u still does not boot kernel with the following patch applied on 5.10: https://patchwork.kernel.org/project/linux-riscv/patch/20201217074855.1948743-1-atish.pa...@wdc.com/ Command I used: $ qemu-system-riscv32 -nographic -M sifive_u -m 1G -smp 5 -kernel arch/riscv/boot/Image 32-bit virt cannot boot the same kernel image with memory set to 2G either: $ qemu-system-riscv32 -nographic -M virt -m 2G -smp 4 -kernel arch/riscv/boot/Image Regards, Bin