x86/Kconfig: Add missing i586-class CPUs to the X86_CMPXCHG64 Kconfig group
authorMatthew Whitehead <tedheadster@gmail.com>
Thu, 15 Feb 2018 16:54:54 +0000 (11:54 -0500)
committerIngo Molnar <mingo@kernel.org>
Fri, 16 Feb 2018 09:36:39 +0000 (10:36 +0100)
commitf960cfd12650fad43c1cde07a1f7642cf2c57f97
tree53813881d038be7d57ef6eb02ebd55e5b70f333b
parente525de3ab04621d227330aa82cd4073c0b0f3579
x86/Kconfig: Add missing i586-class CPUs to the X86_CMPXCHG64 Kconfig group

Several i586-class CPUs supporting this instruction are missing from
the X86_CMPXCHG64 config group.

Using a configuration with either M586TSC or M586MMX currently sets
X86_MINIMUM_CPU_FAMILY=4 instead of the correct value of 5.

Booting on an i486 it will fail to generate the "This kernel
requires an i586 CPU, but only detected an i486 CPU" message and
intentional halt as expected. It will instead just silently hang
when it hits i586-specific instructions.

The M586 CPU is not in this list because at least the Cyrix 5x86
lacks this instruction, and perhaps others.

Signed-off-by: Matthew Whitehead <tedheadster@gmail.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1518713696-11360-1-git-send-email-tedheadster@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
arch/x86/Kconfig.cpu