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authorLinus Torvalds <torvalds@linux-foundation.org>2016-01-11 16:26:03 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-01-11 16:26:03 -0800
commit67c707e451e12f59e57bca6cf33b5803cb74b022 (patch)
tree0a0166807867a8ca7543dd7f56a5e197efc98bb9 /arch/x86/Kconfig
parent463eb8ac337bad30ace10835108a56df5817cc76 (diff)
parent0105c8d8334fc941e0297ca6708fa57854114c0e (diff)
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Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 cleanups from Ingo Molnar: "The main changes in this cycle were: - code patching and cpu_has cleanups (Borislav Petkov) - paravirt cleanups (Juergen Gross) - TSC cleanup (Thomas Gleixner) - ptrace cleanup (Chen Gang)" * 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: arch/x86/kernel/ptrace.c: Remove unused arg_offs_table x86/mm: Align macro defines x86/cpu: Provide a config option to disable static_cpu_has x86/cpufeature: Remove unused and seldomly used cpu_has_xx macros x86/cpufeature: Cleanup get_cpu_cap() x86/cpufeature: Move some of the scattered feature bits to x86_capability x86/paravirt: Remove paravirt ops pmd_update[_defer] and pte_update_defer x86/paravirt: Remove unused pv_apic_ops structure x86/tsc: Remove unused tsc_pre_init() hook x86: Remove unused function cpu_has_ht_siblings() x86/paravirt: Kill some unused patching functions
Diffstat (limited to 'arch/x86/Kconfig')
-rw-r--r--arch/x86/Kconfig11
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 965fc4216f76..258965d56beb 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -349,6 +349,17 @@ config X86_FEATURE_NAMES
If in doubt, say Y.
+config X86_FAST_FEATURE_TESTS
+ bool "Fast CPU feature tests" if EMBEDDED
+ default y
+ ---help---
+ Some fast-paths in the kernel depend on the capabilities of the CPU.
+ Say Y here for the kernel to patch in the appropriate code at runtime
+ based on the capabilities of the CPU. The infrastructure for patching
+ code at runtime takes up some additional space; space-constrained
+ embedded systems may wish to say N here to produce smaller, slightly
+ slower code.
+
config X86_X2APIC
bool "Support x2apic"
depends on X86_LOCAL_APIC && X86_64 && (IRQ_REMAP || HYPERVISOR_GUEST)
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