From: Guo Ren <guoren@xxxxxxxxxxxxxxxxx> The firmware of riscv (such as opensbi) occupy 2MB(64bit) / 4MB(32bit) in Linux. It's very wasteful to small memory footprint soc chip such as Allwinner D1s/F133. The kernel parameter gives a chance to users to set the proper size of the firmware and get more than 1.5MB of memory. Signed-off-by: Guo Ren <guoren@xxxxxxxxxxxxxxxxx> Cc: Palmer Dabbelt <palmer@xxxxxxxxxxx> Cc: Anup Patel <anup.patel@xxxxxxx> Cc: Atish Patra <atishp@xxxxxxxxxxxx> --- Documentation/admin-guide/kernel-parameters.txt | 3 +++ 1 file changed, 3 insertions(+) diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 9725c546a0d4..ee505743c8f4 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -4964,6 +4964,9 @@ [KNL] Disable ring 3 MONITOR/MWAIT feature on supported CPUs. + riscv.fwsz=nn[KMG] + [RISC-V] Determine firmware size to save memory + ro [KNL] Mount root device read-only on boot rodata= [KNL] -- 2.25.1
