From: guoren@kernel.org
To: guoren@kernel.org, anup@brainfault.org, palmer@dabbelt.com,
atishp@rivosinc.com
Cc: linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org,
linux-doc@vger.kernel.org, Guo Ren <guoren@linux.alibaba.com>,
Anup Patel <anup.patel@wdc.com>
Subject: [RFC PATCH 3/3] riscv: Add riscv.fwsz kernel parameter
Date: Tue, 23 Nov 2021 09:57:17 +0800 [thread overview]
Message-ID: <20211123015717.542631-4-guoren@kernel.org> (raw)
In-Reply-To: <20211123015717.542631-1-guoren@kernel.org>
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.
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Anup Patel <anup.patel@wdc.com>
Cc: Atish Patra <atishp@rivosinc.com>
---
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
next prev parent reply other threads:[~2021-11-23 1:57 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-23 1:57 [RFC PATCH 0/3] riscv: Add riscv.fwsz kernel parameter to save memory guoren
2021-11-23 1:57 ` [RFC PATCH 1/3] riscv: Remove 2MB offset in the mm layout guoren
2021-11-23 3:56 ` Anup Patel
2021-11-23 6:18 ` Guo Ren
2021-11-23 13:37 ` Alexandre Ghiti
2021-11-24 11:58 ` Guo Ren
2021-11-24 15:09 ` Alexandre ghiti
2021-11-23 1:57 ` [RFC PATCH 2/3] riscv: Add early_param to decrease firmware region guoren
2021-11-23 3:44 ` Anup Patel
2021-11-23 11:53 ` Jessica Clarke
2021-11-23 13:37 ` Alexandre Ghiti
2021-11-23 1:57 ` guoren [this message]
2021-11-23 2:34 ` [RFC PATCH 3/3] riscv: Add riscv.fwsz kernel parameter Randy Dunlap
2021-11-23 3:21 ` Guo Ren
2021-11-23 3:45 ` Anup Patel
2021-11-23 19:33 ` [RFC PATCH 0/3] riscv: Add riscv.fwsz kernel parameter to save memory Heiko Stübner
2021-11-23 20:01 ` Atish Patra
2021-11-23 21:50 ` Heiko Stübner
2021-11-24 6:49 ` Guo Ren
2021-11-24 12:13 ` Heiko Stübner
2021-11-24 14:25 ` Guo Ren
2021-11-24 6:42 ` Guo Ren
2021-11-24 12:16 ` Heiko Stübner
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