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-rw-r--r--arch/x86/Kconfig.cpu13
1 files changed, 8 insertions, 5 deletions
diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu
index 2c518fbc52ec..b225219c448c 100644
--- a/arch/x86/Kconfig.cpu
+++ b/arch/x86/Kconfig.cpu
@@ -382,14 +382,17 @@ config X86_OOSTORE
382# P6_NOPs are a relatively minor optimization that require a family >= 382# P6_NOPs are a relatively minor optimization that require a family >=
383# 6 processor, except that it is broken on certain VIA chips. 383# 6 processor, except that it is broken on certain VIA chips.
384# Furthermore, AMD chips prefer a totally different sequence of NOPs 384# Furthermore, AMD chips prefer a totally different sequence of NOPs
385# (which work on all CPUs). As a result, disallow these if we're 385# (which work on all CPUs). In addition, it looks like Virtual PC
386# compiling X86_GENERIC but not X86_64 (these NOPs do work on all 386# does not understand them.
387# x86-64 capable chips); the list of processors in the right-hand clause 387#
388# are the cores that benefit from this optimization. 388# As a result, disallow these if we're not compiling for X86_64 (these
389# NOPs do work on all x86-64 capable chips); the list of processors in
390# the right-hand clause are the cores that benefit from this optimization.
389# 391#
390config X86_P6_NOP 392config X86_P6_NOP
391 def_bool y 393 def_bool y
392 depends on (X86_64 || !X86_GENERIC) && (M686 || MPENTIUMII || MPENTIUMIII || MPENTIUMM || MCORE2 || MPENTIUM4 || MPSC) 394 depends on X86_64
395 depends on (MCORE2 || MPENTIUM4 || MPSC)
393 396
394config X86_TSC 397config X86_TSC
395 def_bool y 398 def_bool y