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From: Russell King - ARM Linux <linux@arm.linux.org.uk>
To: linux-arm-kernel@lists.infradead.org, linux-omap@vger.kernel.org
Subject: [PATCH 12/14] ARM: v6k: do not disable CPU_32v6K based on platform selection
Date: Mon, 17 Jan 2011 19:25:04 +0000	[thread overview]
Message-ID: <E1PeuhM-0003T1-Js@rmk-PC.arm.linux.org.uk> (raw)
In-Reply-To: <20110117192050.GE23331@n2100.arm.linux.org.uk>

CPU_32v6K controls whether we use the ARMv6K extension instructions in
the kernel, and in some places whether we use SMP-safe code sequences
(eg, bitops.)

MX3 prevents the selection of this option to ensure that it is not
enabled for their CPU, which is ARMv6 only.  Now that we've split the
CPU_V6 option, V6K support won't be offered for MX3 anymore.

OMAP prevents the selection of this option in an attempt to produce a
kernel which runs on architectures from ARMv6 to ARMv7 MPCore.  We now
achieve this in a different way (see the previous patches).

As such, we no longer need to offer this as a configuration option to
the user.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 arch/arm/mm/Kconfig |   14 +++-----------
 1 files changed, 3 insertions(+), 11 deletions(-)

diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
index 29215f5..ca1238b 100644
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -405,7 +405,7 @@ config CPU_V6
 config CPU_V6K
 	bool "Support ARM V6K processor" if ARCH_INTEGRATOR || MACH_REALVIEW_EB || MACH_REALVIEW_PBX
 	select CPU_32v6
-	select CPU_32v6K if !ARCH_OMAP2
+	select CPU_32v6K
 	select CPU_ABRT_EV6
 	select CPU_PABRT_V6
 	select CPU_CACHE_V6
@@ -418,7 +418,7 @@ config CPU_V6K
 # ARMv7
 config CPU_V7
 	bool "Support ARM V7 processor" if ARCH_INTEGRATOR || MACH_REALVIEW_EB || MACH_REALVIEW_PBX
-	select CPU_32v6K if !ARCH_OMAP2
+	select CPU_32v6K
 	select CPU_32v7
 	select CPU_ABRT_EV7
 	select CPU_PABRT_V7
@@ -461,15 +461,7 @@ config CPU_32v6
 	select CPU_USE_DOMAINS if CPU_V6 && MMU
 
 config CPU_32v6K
-	bool "Support ARM V6K processor extensions" if !SMP
-	depends on CPU_V6 || CPU_V6K || CPU_V7
-	default y if SMP && !(ARCH_MX3 || ARCH_OMAP2)
-	help
-	  Say Y here if your ARMv6 processor supports the 'K' extension.
-	  This enables the kernel to use some instructions not present
-	  on previous processors, and as such a kernel build with this
-	  enabled will not boot on processors with do not support these
-	  instructions.
+	bool
 
 config CPU_32v7
 	bool
-- 
1.6.2.5


WARNING: multiple messages have this Message-ID (diff)
From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 12/14] ARM: v6k: do not disable CPU_32v6K based on platform selection
Date: Mon, 17 Jan 2011 19:25:04 +0000	[thread overview]
Message-ID: <E1PeuhM-0003T1-Js@rmk-PC.arm.linux.org.uk> (raw)
In-Reply-To: <20110117192050.GE23331@n2100.arm.linux.org.uk>

CPU_32v6K controls whether we use the ARMv6K extension instructions in
the kernel, and in some places whether we use SMP-safe code sequences
(eg, bitops.)

MX3 prevents the selection of this option to ensure that it is not
enabled for their CPU, which is ARMv6 only.  Now that we've split the
CPU_V6 option, V6K support won't be offered for MX3 anymore.

OMAP prevents the selection of this option in an attempt to produce a
kernel which runs on architectures from ARMv6 to ARMv7 MPCore.  We now
achieve this in a different way (see the previous patches).

As such, we no longer need to offer this as a configuration option to
the user.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 arch/arm/mm/Kconfig |   14 +++-----------
 1 files changed, 3 insertions(+), 11 deletions(-)

diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
index 29215f5..ca1238b 100644
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -405,7 +405,7 @@ config CPU_V6
 config CPU_V6K
 	bool "Support ARM V6K processor" if ARCH_INTEGRATOR || MACH_REALVIEW_EB || MACH_REALVIEW_PBX
 	select CPU_32v6
-	select CPU_32v6K if !ARCH_OMAP2
+	select CPU_32v6K
 	select CPU_ABRT_EV6
 	select CPU_PABRT_V6
 	select CPU_CACHE_V6
@@ -418,7 +418,7 @@ config CPU_V6K
 # ARMv7
 config CPU_V7
 	bool "Support ARM V7 processor" if ARCH_INTEGRATOR || MACH_REALVIEW_EB || MACH_REALVIEW_PBX
-	select CPU_32v6K if !ARCH_OMAP2
+	select CPU_32v6K
 	select CPU_32v7
 	select CPU_ABRT_EV7
 	select CPU_PABRT_V7
@@ -461,15 +461,7 @@ config CPU_32v6
 	select CPU_USE_DOMAINS if CPU_V6 && MMU
 
 config CPU_32v6K
-	bool "Support ARM V6K processor extensions" if !SMP
-	depends on CPU_V6 || CPU_V6K || CPU_V7
-	default y if SMP && !(ARCH_MX3 || ARCH_OMAP2)
-	help
-	  Say Y here if your ARMv6 processor supports the 'K' extension.
-	  This enables the kernel to use some instructions not present
-	  on previous processors, and as such a kernel build with this
-	  enabled will not boot on processors with do not support these
-	  instructions.
+	bool
 
 config CPU_32v7
 	bool
-- 
1.6.2.5

  parent reply	other threads:[~2011-01-17 19:25 UTC|newest]

Thread overview: 254+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-01-17 19:20 [PATCH 00/14] Fix issues with ARMv6+v6k+v7 kernels Russell King - ARM Linux
2011-01-17 19:20 ` Russell King - ARM Linux
2011-01-17 19:21 ` [PATCH 01/14] ARM: bitops: ensure set/clear/change bitops take a word-aligned pointer Russell King - ARM Linux
2011-01-17 19:21   ` Russell King - ARM Linux
2011-01-18  6:00   ` Nicolas Pitre
2011-01-18  6:00     ` Nicolas Pitre
2011-01-18 14:30     ` Russell King - ARM Linux
2011-01-18 14:30       ` Russell King - ARM Linux
2011-01-18 18:20       ` Nicolas Pitre
2011-01-18 18:20         ` Nicolas Pitre
2011-01-18 15:11     ` Catalin Marinas
2011-01-18 15:11       ` Catalin Marinas
2011-01-25 19:50   ` Tony Lindgren
2011-01-25 19:50     ` Tony Lindgren
2011-01-17 19:21 ` [PATCH 02/14] ARM: bitops: switch set/clear/change bitops to use ldrex/strex Russell King - ARM Linux
2011-01-17 19:21   ` Russell King - ARM Linux
2011-01-18  5:42   ` Nicolas Pitre
2011-01-18  5:42     ` Nicolas Pitre
2011-01-23  0:16   ` Russell King - ARM Linux
2011-01-23  0:16     ` Russell King - ARM Linux
2011-01-23  4:44     ` Nicolas Pitre
2011-01-23  4:44       ` Nicolas Pitre
2011-01-23  9:35       ` Russell King - ARM Linux
2011-01-23  9:35         ` Russell King - ARM Linux
2011-01-24  8:38         ` Poddar, Sourav
2011-01-24  8:38           ` Poddar, Sourav
2011-01-24  8:57           ` Poddar, Sourav
2011-01-24  8:57             ` Poddar, Sourav
2011-01-24 10:28             ` Russell King - ARM Linux
2011-01-24 10:28               ` Russell King - ARM Linux
2011-01-24 13:47               ` Poddar, Sourav
2011-01-24 13:47                 ` Poddar, Sourav
2011-01-24 14:11                 ` Russell King - ARM Linux
2011-01-24 14:11                   ` Russell King - ARM Linux
2011-01-24 14:54                   ` Poddar, Sourav
2011-01-24 14:54                     ` Poddar, Sourav
2011-01-24 15:00                     ` Russell King - ARM Linux
2011-01-24 15:00                       ` Russell King - ARM Linux
2011-01-25 13:57     ` Will Deacon
2011-01-25 13:57     ` Will Deacon
2011-01-25 14:11       ` Russell King - ARM Linux
2011-01-25 14:11         ` Russell King - ARM Linux
2011-01-25 14:19         ` Will Deacon
2011-01-25 14:19         ` Will Deacon
     [not found]     ` <000601cbbc97$cc6955d0$653c0170$%deacon@arm.com>
2011-01-25 21:38       ` Nicolas Pitre
2011-01-25 21:38         ` Nicolas Pitre
2011-01-25 19:51   ` Tony Lindgren
2011-01-25 19:51     ` Tony Lindgren
2011-01-17 19:22 ` [PATCH 03/14] ARM: v6k: remove CPU_32v6K dependencies in asm/spinlock.h Russell King - ARM Linux
2011-01-17 19:22   ` Russell King - ARM Linux
2011-01-17 23:13   ` Tony Lindgren
2011-01-17 23:13     ` Tony Lindgren
2011-01-25 16:43   ` Dave Martin
2011-01-25 16:43     ` Dave Martin
2011-01-25 16:59     ` Russell King - ARM Linux
2011-01-25 16:59       ` Russell King - ARM Linux
2011-01-25 17:33       ` Dave Martin
2011-01-25 17:33         ` Dave Martin
2011-01-25 17:46         ` Russell King - ARM Linux
2011-01-25 17:46           ` Russell King - ARM Linux
2011-01-25 21:21           ` Nicolas Pitre
2011-01-25 21:21             ` Nicolas Pitre
2011-01-26 11:11             ` Dave Martin
2011-01-26 11:11               ` Dave Martin
2011-01-26 12:44               ` Russell King - ARM Linux
2011-01-26 12:44                 ` Russell King - ARM Linux
2011-01-26 17:25                 ` [PATCH] ARM: Avoid discarding sections that might have SMP_ON_UP fixups Dave P. Martin
2011-01-26 17:25                   ` Dave P. Martin
2011-01-26 21:31                   ` Nicolas Pitre
2011-01-26 21:31                     ` Nicolas Pitre
2011-01-27 14:37                     ` [PATCH v2] ARM: Avoid discarding sections that might have SMP_ON_UP fixups " Dave Martin
2011-01-27 14:37                       ` Dave Martin
2011-01-27 16:46                       ` Russell King - ARM Linux
2011-01-27 16:46                         ` Russell King - ARM Linux
2011-02-09 14:22                   ` [PATCH] ARM: Avoid discarding sections that might have " Russell King - ARM Linux
2011-02-09 14:22                     ` Russell King - ARM Linux
2011-02-10 12:56                     ` Russell King - ARM Linux
2011-02-10 12:56                       ` Russell King - ARM Linux
2011-02-10 14:11                       ` Dave Martin
2011-02-10 14:11                         ` Dave Martin
2011-02-10 14:13                         ` Dave Martin
2011-02-10 14:13                           ` Dave Martin
2011-02-10 14:46                           ` Russell King - ARM Linux
2011-02-10 14:46                             ` Russell King - ARM Linux
2011-02-10 18:29                             ` Dave Martin
2011-02-10 18:29                               ` Dave Martin
2011-02-10 19:11                               ` Russell King - ARM Linux
2011-02-10 19:11                                 ` Russell King - ARM Linux
2011-02-11  9:33                                 ` Dave Martin
2011-02-11  9:33                                   ` Dave Martin
2011-02-11 10:13                                   ` Russell King - ARM Linux
2011-02-11 10:13                                     ` Russell King - ARM Linux
2011-02-11 10:52                                     ` Dave Martin
2011-02-11 10:52                                       ` Dave Martin
2011-02-11 16:05                                       ` Russell King - ARM Linux
2011-02-11 16:05                                         ` Russell King - ARM Linux
2011-02-11 16:17                                         ` Dave Martin
2011-02-11 16:17                                           ` Dave Martin
2011-02-11 16:32                                           ` Russell King - ARM Linux
2011-02-11 16:32                                             ` Russell King - ARM Linux
2011-02-16 16:35                                             ` Dave Martin
2011-02-16 16:35                                               ` Dave Martin
2011-02-18 17:52                                               ` Dave Martin
2011-02-18 17:52                                                 ` Dave Martin
2011-01-26 15:42               ` [PATCH 03/14] ARM: v6k: remove CPU_32v6K dependencies in asm/spinlock.h Nicolas Pitre
2011-01-26 15:42                 ` Nicolas Pitre
2011-01-26 15:52                 ` Russell King - ARM Linux
2011-01-26 15:52                   ` Russell King - ARM Linux
2011-01-26 16:59                   ` Dave Martin
2011-01-26 16:59                     ` Dave Martin
2011-01-26 21:06                     ` Nicolas Pitre
2011-01-26 21:06                       ` Nicolas Pitre
2011-01-27 11:44                       ` Dave P. Martin
2011-01-27 11:44                         ` Dave P. Martin
2011-01-17 19:22 ` [PATCH 04/14] ARM: v6k: introduce CPU_V6K option Russell King - ARM Linux
2011-01-17 19:22   ` Russell King - ARM Linux
2011-01-17 23:14   ` Tony Lindgren
2011-01-17 23:14     ` Tony Lindgren
2011-01-18 10:36   ` Will Deacon
2011-01-18 10:36   ` Will Deacon
2011-01-18 11:09     ` Russell King - ARM Linux
2011-01-18 11:09       ` Russell King - ARM Linux
2011-01-18 13:35       ` Russell King - ARM Linux
2011-01-18 13:35         ` Russell King - ARM Linux
2011-01-18 15:22         ` Will Deacon
2011-01-18 15:22         ` Will Deacon
2011-01-17 19:22 ` [PATCH 05/14] ARM: v6k: Realview EB 11MPCore and PB11MPCore use V6K architecture CPUs Russell King - ARM Linux
2011-01-17 19:22   ` Russell King - ARM Linux
2011-01-17 19:23 ` [PATCH 06/14] ARM: v6k: Dove platforms " Russell King - ARM Linux
2011-01-17 19:23   ` Russell King - ARM Linux
2011-01-17 23:39   ` Nicolas Pitre
2011-01-17 23:39     ` Nicolas Pitre
2011-01-17 19:23 ` [PATCH 07/14] ARM: v6k: select clear exclusive code seqences according to V6 variants Russell King - ARM Linux
2011-01-17 19:23   ` Russell King - ARM Linux
2011-01-17 23:15   ` Tony Lindgren
2011-01-17 23:15     ` Tony Lindgren
2011-01-17 19:23 ` [PATCH 08/14] ARM: v6k: select cmpxchg code sequences " Russell King - ARM Linux
2011-01-17 19:23   ` Russell King - ARM Linux
2011-01-17 23:18   ` Tony Lindgren
2011-01-17 23:18     ` Tony Lindgren
2011-01-17 19:24 ` [PATCH 09/14] ARM: v6k: select generic atomic64 code " Russell King - ARM Linux
2011-01-17 19:24   ` Russell King - ARM Linux
2011-01-17 23:21   ` Tony Lindgren
2011-01-17 23:21     ` Tony Lindgren
2011-01-18 10:24   ` Will Deacon
2011-01-18 10:24   ` Will Deacon
2011-01-17 19:24 ` [PATCH 10/14] ARM: v6k: select TLS register " Russell King - ARM Linux
2011-01-17 19:24   ` Russell King - ARM Linux
2011-01-17 22:23   ` Nicolas Pitre
2011-01-17 22:23     ` Nicolas Pitre
2011-01-17 22:36     ` Russell King - ARM Linux
2011-01-17 22:36       ` Russell King - ARM Linux
2011-01-17 22:52       ` Russell King - ARM Linux
2011-01-17 22:52         ` Russell King - ARM Linux
2011-01-18  4:27         ` Nicolas Pitre
2011-01-18  4:27           ` Nicolas Pitre
2011-01-18  4:25       ` Nicolas Pitre
2011-01-18  4:25         ` Nicolas Pitre
2011-01-17 23:21     ` Tony Lindgren
2011-01-17 23:21       ` Tony Lindgren
2011-01-17 19:24 ` [PATCH 11/14] ARM: v6k: use CPU domain feature if we include support for arch < ARMv6K Russell King - ARM Linux
2011-01-17 19:24   ` Russell King - ARM Linux
2011-01-17 22:03   ` Nicolas Pitre
2011-01-17 22:03     ` Nicolas Pitre
2011-01-17 23:23     ` Tony Lindgren
2011-01-17 23:23       ` Tony Lindgren
2011-01-27 18:14   ` Catalin Marinas
2011-01-27 18:14     ` Catalin Marinas
2011-01-27 18:59     ` Russell King - ARM Linux
2011-01-27 18:59       ` Russell King - ARM Linux
2011-01-28  9:46       ` Catalin Marinas
2011-01-28  9:46         ` Catalin Marinas
2011-01-28  9:59         ` Russell King - ARM Linux
2011-01-28  9:59           ` Russell King - ARM Linux
2011-01-28 10:46           ` Catalin Marinas
2011-01-28 10:46             ` Catalin Marinas
2011-01-28 11:06             ` Russell King - ARM Linux
2011-01-28 11:06               ` Russell King - ARM Linux
2011-01-28 12:25               ` Catalin Marinas
2011-01-28 12:25                 ` Catalin Marinas
2011-01-28 13:05                 ` Russell King - ARM Linux
2011-01-28 13:05                   ` Russell King - ARM Linux
2011-01-28 13:10                   ` Catalin Marinas
2011-01-28 13:10                     ` Catalin Marinas
2011-01-28 13:22                     ` Russell King - ARM Linux
2011-01-28 13:22                       ` Russell King - ARM Linux
2011-01-28 13:21                 ` Russell King - ARM Linux
2011-01-28 13:21                   ` Russell King - ARM Linux
2011-01-28 15:11                   ` Catalin Marinas
2011-01-28 15:11                     ` Catalin Marinas
2011-01-28 16:49                     ` Tony Lindgren
2011-01-28 16:49                       ` Tony Lindgren
2011-01-17 19:25 ` Russell King - ARM Linux [this message]
2011-01-17 19:25   ` [PATCH 12/14] ARM: v6k: do not disable CPU_32v6K based on platform selection Russell King - ARM Linux
2011-01-17 23:24   ` Tony Lindgren
2011-01-17 23:24     ` Tony Lindgren
2011-01-17 19:25 ` [PATCH 13/14] ARM: v6k: allow swp emulation again when ARMv7 is enabled Russell King - ARM Linux
2011-01-17 19:25   ` Russell King - ARM Linux
2011-01-17 23:24   ` Tony Lindgren
2011-01-17 23:24     ` Tony Lindgren
2011-01-17 19:25 ` [PATCH 14/14] ARM: v6k: only allow SMP if we have v6k or v7 CPU Russell King - ARM Linux
2011-01-17 19:25   ` Russell King - ARM Linux
2011-01-17 23:25   ` Tony Lindgren
2011-01-17 23:25     ` Tony Lindgren
2011-01-17 22:21 ` [PATCH 00/14] Fix issues with ARMv6+v6k+v7 kernels Tony Lindgren
2011-01-17 22:21   ` Tony Lindgren
2011-01-18 14:30 ` Kirill A. Shutemov
2011-01-18 14:30   ` Kirill A. Shutemov
2011-01-18 14:40   ` Russell King - ARM Linux
2011-01-18 14:40     ` Russell King - ARM Linux
2011-01-18 14:44     ` Kirill A. Shutemov
2011-01-18 14:44       ` Kirill A. Shutemov
2011-01-18 15:01       ` Russell King - ARM Linux
2011-01-18 15:01         ` Russell King - ARM Linux
2011-02-08 16:36 ` Santosh Shilimkar
2011-02-08 16:36   ` Santosh Shilimkar
2011-02-08 16:47   ` Russell King - ARM Linux
2011-02-08 16:47     ` Russell King - ARM Linux
2011-02-08 16:58     ` Santosh Shilimkar
2011-02-08 16:58       ` Santosh Shilimkar
2011-02-08 20:43       ` Nicolas Pitre
2011-02-08 20:43         ` Nicolas Pitre
2011-02-09  0:35         ` Tony Lindgren
2011-02-09  0:35           ` Tony Lindgren
2011-02-09  6:04           ` Santosh Shilimkar
2011-02-09  6:04             ` Santosh Shilimkar
2011-02-09  9:48             ` Dave Martin
2011-02-09  9:48               ` Dave Martin
2011-02-09 10:00               ` Santosh Shilimkar
2011-02-09 10:00                 ` Santosh Shilimkar
2011-02-09 16:24                 ` Tony Lindgren
2011-02-09 16:24                   ` Tony Lindgren
2011-02-09 16:27                   ` Santosh Shilimkar
2011-02-09 16:27                     ` Santosh Shilimkar
2011-02-09 16:32                   ` Russell King - ARM Linux
2011-02-09 16:32                     ` Russell King - ARM Linux
2011-02-09 16:44                     ` Russell King - ARM Linux
2011-02-09 16:44                       ` Russell King - ARM Linux
2011-02-09 16:45                     ` Nicolas Pitre
2011-02-09 16:45                       ` Nicolas Pitre
2011-02-09 17:48                       ` Tony Lindgren
2011-02-09 17:48                         ` Tony Lindgren
2011-02-09 10:01     ` Catalin Marinas
2011-02-09 10:01       ` Catalin Marinas
2011-02-10 13:04       ` Russell King - ARM Linux
2011-02-10 13:04         ` Russell King - ARM Linux
2011-02-10 13:12         ` Catalin Marinas
2011-02-10 13:12           ` Catalin Marinas
2011-02-10 13:16           ` Russell King - ARM Linux
2011-02-10 13:16             ` Russell King - ARM Linux
2011-02-11 20:45           ` Nicolas Pitre
2011-02-11 20:45             ` Nicolas Pitre
2011-02-11 21:07             ` Russell King - ARM Linux
2011-02-11 21:07               ` Russell King - ARM Linux

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