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From: Xi Ruoyao <xry111@mengyan1223.wang>
To: linux-mips@vger.kernel.org
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
	linux-kernel@vger.kernel.org, Huacai Chen <chenhuacai@kernel.org>
Subject: [PATCH] mips: remove reference to "newer Loongson-3"
Date: Sun, 29 Aug 2021 20:49:09 +0800	[thread overview]
Message-ID: <0b7c9431efb12c2d957fcc53ec8f0743725d61b3.camel@mengyan1223.wang> (raw)

Newest Loongson-3 processors have moved to use LoongArch architecture.
Sadly, the LL/SC issue is still existing on both latest Loongson-3
processors using MIPS64 (Loongson-3A4000) and LoongArch
(Loongson-3A5000).

As it's very unlikely there will be new Loongson-3 processors using
MIPS64, let's stop people from false hoping.

Signed-off-by: Xi Ruoyao <xry111@mengyan1223.wang>
Cc: Huacai Chen <chenhuacai@kernel.org>
---

Huacai: how's the status of LL/SC issue on Loongson-2K?  If
the issue exists on it as well, we can just force
CPU_LOONGSON3_WORKAROUNDS when CONFIG_CPU_LOONGSON64 and
CONFIG_SMP are both selected.

 arch/mips/Kconfig | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 6dfb27d531dd..ff5f344a371e 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1433,19 +1433,14 @@ config LOONGSON3_ENHANCEMENT
 	  new Loongson-3 machines only, please say 'Y' here.
 
 config CPU_LOONGSON3_WORKAROUNDS
-	bool "Old Loongson-3 LLSC Workarounds"
+	bool "Loongson-3 LLSC Workarounds"
 	default y if SMP
 	depends on CPU_LOONGSON64
 	help
 	  Loongson-3 processors have the llsc issues which require workarounds.
 	  Without workarounds the system may hang unexpectedly.
 
-	  Newer Loongson-3 will fix these issues and no workarounds are needed.
-	  The workarounds have no significant side effect on them but may
-	  decrease the performance of the system so this option should be
-	  disabled unless the kernel is intended to be run on old systems.
-
-	  If unsure, please say Y.
+	  Say Y, unless you know what you are doing.
 
 config CPU_LOONGSON3_CPUCFG_EMULATION
 	bool "Emulate the CPUCFG instruction on older Loongson cores"
-- 
2.33.0



             reply	other threads:[~2021-08-29 12:54 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-29 12:49 Xi Ruoyao [this message]
2021-08-30  2:32 ` [PATCH] mips: remove reference to "newer Loongson-3" Jiaxun Yang
2021-08-30 12:28   ` Xi Ruoyao
2021-08-30 16:14     ` Jiaxun Yang
2021-08-30 16:25       ` Xi Ruoyao
2022-03-07 12:24 ` Thomas Bogendoerfer

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