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authorRusty Russell <rusty@rustcorp.com.au>2010-01-05 12:48:49 +1030
committerH. Peter Anvin <hpa@zytor.com>2010-01-04 19:35:49 -0800
commitf4b825bde98938f160315d655597bc9731521cae (patch)
treec4d18f9be58e37ac1eae01f5821add30e9ce1c2c /arch/x86
parenta557aae29cf5916295c234d4b10ba3f8f29b8a96 (diff)
Revert "x86: Side-step lguest problem by only building cmpxchg8b_emu for pre-Pentium"
This reverts commit ae1b22f6e46c03cede7cea234d0bf2253b4261cf. As Linus said in 982d007a6ee: "There was something really messy about cmpxchg8b and clone CPU's, so if you enable it on other CPUs later, do it carefully." This breaks lguest for those configs, but we can fix that by emulating if we have to. Fixes: http://bugzilla.kernel.org/show_bug.cgi?id=14884 Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> LKML-Reference: <201001051248.49700.rusty@rustcorp.com.au> Cc: stable@kernel.org Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/Kconfig.cpu2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu
index 08e442bc3ab..f20ddf84a89 100644
--- a/arch/x86/Kconfig.cpu
+++ b/arch/x86/Kconfig.cpu
@@ -396,7 +396,7 @@ config X86_TSC
config X86_CMPXCHG64
def_bool y
- depends on !M386 && !M486
+ depends on X86_PAE || X86_64 || MCORE2 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MATOM
# this should be set for all -march=.. options where the compiler
# generates cmov.