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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


WARNING: multiple messages have this Message-ID (diff)
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


_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv

  parent reply	other threads:[~2021-11-23  1:57 UTC|newest]

Thread overview: 46+ 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 ` guoren
2021-11-23  1:57 ` [RFC PATCH 1/3] riscv: Remove 2MB offset in the mm layout guoren
2021-11-23  1:57   ` guoren
2021-11-23  3:56   ` Anup Patel
2021-11-23  3:56     ` Anup Patel
2021-11-23  6:18     ` Guo Ren
2021-11-23  6:18       ` Guo Ren
2021-11-23 13:37     ` Alexandre Ghiti
2021-11-23 13:37       ` Alexandre Ghiti
2021-11-24 11:58       ` Guo Ren
2021-11-24 11:58         ` Guo Ren
2021-11-24 15:09         ` Alexandre ghiti
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  1:57   ` guoren
2021-11-23  3:44   ` Anup Patel
2021-11-23  3:44     ` Anup Patel
2021-11-23 11:53     ` Jessica Clarke
2021-11-23 11:53       ` Jessica Clarke
2021-11-23 13:37       ` Alexandre Ghiti
2021-11-23 13:37         ` Alexandre Ghiti
2021-11-23  1:57 ` guoren [this message]
2021-11-23  1:57   ` [RFC PATCH 3/3] riscv: Add riscv.fwsz kernel parameter guoren
2021-11-23  2:34   ` Randy Dunlap
2021-11-23  2:34     ` Randy Dunlap
2021-11-23  3:21     ` Guo Ren
2021-11-23  3:21       ` Guo Ren
2021-11-23  3:45   ` Anup Patel
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 19:33   ` Heiko Stübner
2021-11-23 20:01   ` Atish Patra
2021-11-23 20:01     ` Atish Patra
2021-11-23 21:50     ` Heiko Stübner
2021-11-23 21:50       ` Heiko Stübner
2021-11-24  6:49     ` Guo Ren
2021-11-24  6:49       ` Guo Ren
2021-11-24 12:13       ` Heiko Stübner
2021-11-24 12:13         ` Heiko Stübner
2021-11-24 14:25         ` Guo Ren
2021-11-24 14:25           ` Guo Ren
2021-11-24  6:42   ` Guo Ren
2021-11-24  6:42     ` Guo Ren
2021-11-24 12:16     ` Heiko Stübner
2021-11-24 12:16       ` Heiko Stübner

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