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[PATCH 23/27] x86: debugctlmsr kconfig

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From: Roland McGrath <roland@...>
To: Andrew Morton <akpm@...>, Linus Torvalds <torvalds@...>
Cc: <linux-kernel@...>, Thomas Gleixner <tglx@...>, Ingo Molnar <mingo@...>, H. Peter Anvin <hpa@...>
Subject: [PATCH 23/27] x86: debugctlmsr kconfig
Date: Sunday, November 25, 2007 - 6:08 pm

This adds the (internal) Kconfig macro CONFIG_X86_DEBUGCTLMSR,
to be defined when configuring to support only hardware that
definitely supports MSR_IA32_DEBUGCTLMSR with the BTF flag.

The Intel documentation says "P6 family" and later processors all have it.
I think the Kconfig dependencies are right to have it set for those and
unset for others (i.e., when 586 and earlier are supported).

Signed-off-by: Roland McGrath <roland@redhat.com>
---
 arch/x86/Kconfig.cpu |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu
index c301622..69e2ee4 100644
--- a/arch/x86/Kconfig.cpu
+++ b/arch/x86/Kconfig.cpu
@@ -399,3 +399,7 @@ config X86_MINIMUM_CPU_FAMILY
 	default "4" if X86_32 && (X86_XADD || X86_CMPXCHG || X86_BSWAP || X86_WP_WORKS_OK)
 	default "3"
 
+config X86_DEBUGCTLMSR
+	bool
+	depends on !(M586MMX || M586TSC || M586 || M486 || M386)
+	default y
-
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Messages in current thread:
[PATCH 01/27] ptrace: arch_has_single_step, Roland McGrath, (Sun Nov 25, 5:55 pm)
Re: [PATCH 01/27] ptrace: arch_has_single_step, Andrew Morton, (Tue Nov 27, 4:53 am)
Re: [PATCH 01/27] ptrace: arch_has_single_step, Roland McGrath, (Tue Nov 27, 7:05 pm)
Re: [PATCH 01/27] ptrace: arch_has_single_step, Ingo Molnar, (Tue Nov 27, 7:58 pm)
Re: [PATCH 01/27] ptrace: arch_has_single_step, Roland McGrath, (Tue Nov 27, 8:08 pm)
Re: [PATCH 01/27] ptrace: arch_has_single_step, Ingo Molnar, (Tue Nov 27, 6:38 am)
Re: [PATCH 01/27] ptrace: arch_has_single_step, Christoph Hellwig, (Sun Nov 25, 6:22 pm)
Re: [PATCH 01/27] ptrace: arch_has_single_step, Roland McGrath, (Sun Nov 25, 6:59 pm)
[PATCH 27/27] x86: PTRACE_SINGLEBLOCK, Roland McGrath, (Sun Nov 25, 6:08 pm)
[PATCH 26/27] x86: debugctlmsr kprobes, Roland McGrath, (Sun Nov 25, 6:08 pm)
[PATCH 25/27] x86: debugctlmsr arch_has_block_step, Roland McGrath, (Sun Nov 25, 6:08 pm)
[PATCH 24/27] x86: debugctlmsr context switch, Roland McGrath, (Sun Nov 25, 6:08 pm)
[PATCH 23/27] x86: debugctlmsr kconfig, Roland McGrath, (Sun Nov 25, 6:08 pm)
Re: [PATCH 23/27] x86: debugctlmsr kconfig, Dave Jones, (Sun Nov 25, 9:57 pm)
Re: [PATCH 23/27] x86: debugctlmsr kconfig, Roland McGrath, (Mon Nov 26, 4:06 am)
Re: [PATCH 23/27] x86: debugctlmsr kconfig, Denys Vlasenko, (Sun Nov 25, 9:09 pm)
Re: [PATCH 23/27] x86: debugctlmsr kconfig, Roland McGrath, (Mon Nov 26, 3:51 am)
Re: [PATCH 23/27] x86: debugctlmsr kconfig, Denys Vlasenko, (Mon Nov 26, 6:52 pm)
[PATCH 22/27] x86: debugctlmsr constants, Roland McGrath, (Sun Nov 25, 6:06 pm)
[PATCH 19/27] x86-32 ptrace debugreg cleanup, Roland McGrath, (Sun Nov 25, 6:05 pm)
[PATCH 21/27] ptrace: generic PTRACE_SINGLEBLOCK, Roland McGrath, (Sun Nov 25, 6:06 pm)
[PATCH 20/27] ptrace: arch_has_block_step, Roland McGrath, (Sun Nov 25, 6:05 pm)
Re: [PATCH 20/27] ptrace: arch_has_block_step, David Wilder, (Wed Nov 28, 7:39 pm)
Re: [PATCH 20/27] ptrace: arch_has_block_step, Roland McGrath, (Wed Nov 28, 7:58 pm)
[PATCH 17/27] x86-64 ptrace debugreg cleanup, Roland McGrath, (Sun Nov 25, 6:04 pm)
[PATCH 18/27] x86-64 ia32 ptrace debugreg cleanup, Roland McGrath, (Sun Nov 25, 6:05 pm)
[PATCH 16/27] x86-64 ptrace: use task_pt_regs, Roland McGrath, (Sun Nov 25, 6:04 pm)
[PATCH 13/27] powerpc: arch_has_single_step, Roland McGrath, (Sun Nov 25, 6:03 pm)
[PATCH 15/27] x86-32 ptrace: use task_pt_regs, Roland McGrath, (Sun Nov 25, 6:04 pm)
[PATCH 14/27] powerpc: ptrace generic resume, Roland McGrath, (Sun Nov 25, 6:04 pm)
Re: [PATCH 14/27] powerpc: ptrace generic resume, Srinivasa Ds, (Mon Dec 3, 4:12 am)
[PATCH 09/27] x86 single_step: TIF_FORCED_TF, Roland McGrath, (Sun Nov 25, 6:00 pm)
[PATCH 11/27] x86-64: ptrace generic resume, Roland McGrath, (Sun Nov 25, 6:01 pm)
[PATCH 10/27] ptrace: generic resume, Roland McGrath, (Sun Nov 25, 6:01 pm)
Re: [PATCH 10/27] ptrace: generic resume, Christoph Hellwig, (Sun Nov 25, 6:23 pm)
Re: [PATCH 10/27] ptrace: generic resume, Roland McGrath, (Sun Nov 25, 6:37 pm)
[PATCH 12/27] x86-32: ptrace generic resume, Roland McGrath, (Sun Nov 25, 6:01 pm)
[PATCH 05/27] x86: single_step moved, Roland McGrath, (Sun Nov 25, 5:59 pm)
[PATCH 08/27] x86: single_step: share code, Roland McGrath, (Sun Nov 25, 6:00 pm)
[PATCH 06/27] x86: single_step segment macros, Roland McGrath, (Sun Nov 25, 5:59 pm)
[PATCH 07/27] x86: single_step 0xf0, Roland McGrath, (Sun Nov 25, 6:00 pm)
[PATCH 03/27] x86: remove TRAP_FLAG, Roland McGrath, (Sun Nov 25, 5:58 pm)
[PATCH 04/27] x86: arch_has_single_step, Roland McGrath, (Sun Nov 25, 5:59 pm)
[PATCH 02/27] x86: segment selector macros, Roland McGrath, (Sun Nov 25, 5:58 pm)