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Subject[RFC PATCH 0/3] riscv: Add riscv.fwsz kernel parameter to save memory
Date
From: Guo Ren <guoren@linux.alibaba.com>

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.

Guo Ren (3):
riscv: Remove 2MB offset in the mm layout
riscv: Add early_param to decrease firmware region
riscv: Add riscv.fwsz kernel parameter

.../admin-guide/kernel-parameters.txt | 3 +++
arch/riscv/include/asm/page.h | 8 +++++++
arch/riscv/kernel/head.S | 10 +++-----
arch/riscv/kernel/vmlinux.lds.S | 5 ++--
arch/riscv/mm/init.c | 23 ++++++++++++++++---
5 files changed, 36 insertions(+), 13 deletions(-)

--
2.25.1

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