On Sun, Apr 19, 2020 at 3:32 AM Atish Patra <atish.pa...@wdc.com> wrote: > > Linux booting protocol mandates that register "a0" contains the hartid. > However, U-Boot can not pass the hartid via a0 during via standard UEFI > protocol. DT nodes are commonly used to pass such information to the OS. > > Add a DT node under chosen node to indicate the boot hartid. EFI stub > in Linux kernel will parse this node and pass it to the real kernel > in "a0" before jumping to it. > > Signed-off-by: Atish Patra <atish.pa...@wdc.com> > Reviewed-by: Rick Chen <r...@andestech.com> > Reviewed-by: Bin Meng <bmeng...@gmail.com> > Tested-by: Heinrich Schuchardt <xypron.g...@gmx.de> > --- > arch/riscv/lib/bootm.c | 22 ++++++++++++++++++++++ > 1 file changed, 22 insertions(+) >
Verified on booting OS, and dump DTB /chosen node Tested-by: Bin Meng <bmeng...@gmail.com>
