From: dave.martin@linaro.org (Dave Martin)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 1/2] ARM: Thumb-2: Make CONFIG_THUMB2_KERNEL depend on !CPU_V6
Date: Thu, 9 Dec 2010 11:59:41 +0000 [thread overview]
Message-ID: <1291895982-4775-2-git-send-email-dave.martin@linaro.org> (raw)
In-Reply-To: <1291895982-4775-1-git-send-email-dave.martin@linaro.org>
This makes sense, because Thumb-2 code can't execute on plain
ARMv6 processors.
This will avoid accidentally configuring a broken kernel where the
config otherwise would allow multiple architecture versions to
coexist in the same kernel.
Not adding !CPU_V5 etc., because the chance of anyone trying to
put v5 and v7 in the same kernel is low, and I'm not aware of
any mach which can do this. These could be added later if it
matters.
Note that the rules may need to be refined if support for the
ARM1156J(F)-S processor is later added to the kernel, since this
processor supports the rare ARMv6T2 extensions, which add support
for Thumb-2 and a few other ARMv7 features.
Signed-off-by: Dave Martin <dave.martin@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
---
arch/arm/Kconfig | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index db524e7..f9ca7f3 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1311,7 +1311,7 @@ config HZ
config THUMB2_KERNEL
bool "Compile the kernel in Thumb-2 mode"
- depends on CPU_V7 && EXPERIMENTAL
+ depends on CPU_V7 && !CPU_V6 && EXPERIMENTAL
select AEABI
select ARM_ASM_UNIFIED
help
--
1.7.1
next prev parent reply other threads:[~2010-12-09 11:59 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-09 11:59 [PATCH 0/2] ARM: Thumb-2: Fix Kconfig rules to avoid nonworking configs Dave Martin
2010-12-09 11:59 ` Dave Martin [this message]
2010-12-09 18:34 ` [PATCH 1/2] ARM: Thumb-2: Make CONFIG_THUMB2_KERNEL depend on !CPU_V6 Nicolas Pitre
2010-12-10 5:47 ` Santosh Shilimkar
2011-02-04 10:47 ` Santosh Shilimkar
2010-12-09 11:59 ` [PATCH 2/2] ARM: Make CONFIG_FPE_NWFPE depend on !CONFIG_THUMB2_KERNEL Dave Martin
2010-12-09 18:32 ` Nicolas Pitre
2010-12-10 5:48 ` Santosh Shilimkar
2011-02-04 10:47 ` Santosh Shilimkar
2011-02-04 11:03 ` Russell King - ARM Linux
2011-02-04 12:01 ` Dave Martin
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