1 files changed, 18 insertions, 8 deletions

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 3e0f80a764a7..aafae3b140de 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -279,14 +279,9 @@ config SPARSE_IRQ
 
           If you don't know what to do here, say N.
 
-config NUMA_MIGRATE_IRQ_DESC
-        bool "Move irq desc when changing irq smp_affinity"
+config NUMA_IRQ_DESC
+        def_bool y
         depends on SPARSE_IRQ && NUMA
-        default n
-        ---help---
-          This enables moving irq_desc to cpu/node that irq will use handled.
-
-          If you don't know what to do here, say N.
 
 config X86_MPPARSE
         bool "Enable MPS table" if ACPI
@@ -358,7 +353,8 @@ config X86_UV
         bool "SGI Ultraviolet"
         depends on X86_64
         depends on X86_EXTENDED_PLATFORM
-        select X86_X2APIC
+        depends on NUMA
+        depends on X86_X2APIC
         ---help---
           This option is needed in order to support SGI Ultraviolet systems.
           If you don't have one of these, you should say N here.
@@ -501,6 +497,19 @@ config PARAVIRT
           over full virtualization.  However, when run without a hypervisor
           the kernel is theoretically slower and slightly larger.
 
+config PARAVIRT_SPINLOCKS
+        bool "Paravirtualization layer for spinlocks"
+        depends on PARAVIRT && SMP && EXPERIMENTAL
+        ---help---
+          Paravirtualized spinlocks allow a pvops backend to replace the
+          spinlock implementation with something virtualization-friendly
+          (for example, block the virtual CPU rather than spinning).
+
+          Unfortunately the downside is an up to 5% performance hit on
+          native kernels, with various workloads.
+
+          If you are unsure how to answer this question, answer N.
+
 config PARAVIRT_CLOCK
         bool
         default n
@@ -668,6 +677,7 @@ config MAXSMP
 
 config NR_CPUS
         int "Maximum number of CPUs" if SMP && !MAXSMP
+        range 2 8 if SMP && X86_32 && !X86_BIGSMP
         range 2 512 if SMP && !MAXSMP
         default "1" if !SMP
         default "4096" if MAXSMP