Merge tag 'for-linus' of git://linux-c6x.org/git/projects/linux-c6x-upstreaming

[cascardo/linux.git] / arch / x86 / Kconfig

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index dddba26..e903c71 100644 (file)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -22,6 +22,7 @@ config X86_64
 config X86
        def_bool y
        select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS
+       select ARCH_MIGHT_HAVE_PC_PARPORT
        select HAVE_AOUT if X86_32
        select HAVE_UNSTABLE_SCHED_CLOCK
        select ARCH_SUPPORTS_NUMA_BALANCING
@@ -90,7 +91,6 @@ config X86
        select GENERIC_IRQ_SHOW
        select GENERIC_CLOCKEVENTS_MIN_ADJUST
        select IRQ_FORCED_THREADING
-       select USE_GENERIC_SMP_HELPERS if SMP
        select HAVE_BPF_JIT if X86_64
        select HAVE_ARCH_TRANSPARENT_HUGEPAGE
        select CLKEVT_I8253
@@ -255,10 +255,6 @@ config ARCH_HWEIGHT_CFLAGS
        default "-fcall-saved-ecx -fcall-saved-edx" if X86_32
        default "-fcall-saved-rdi -fcall-saved-rsi -fcall-saved-rdx -fcall-saved-rcx -fcall-saved-r8 -fcall-saved-r9 -fcall-saved-r10 -fcall-saved-r11" if X86_64
 
-config ARCH_CPU_PROBE_RELEASE
-       def_bool y
-       depends on HOTPLUG_CPU
-
 config ARCH_SUPPORTS_UPROBES
        def_bool y
 
@@ -639,10 +635,10 @@ config PARAVIRT_SPINLOCKS
          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.
+         It has a minimal impact on native kernels and gives a nice performance
+         benefit on paravirtualized KVM / Xen kernels.
 
-         If you are unsure how to answer this question, answer N.
+         If you are unsure how to answer this question, answer Y.
 
 source "arch/x86/xen/Kconfig"
 
@@ -757,20 +753,25 @@ config DMI
          BIOS code.
 
 config GART_IOMMU
-       bool "GART IOMMU support" if EXPERT
-       default y
+       bool "Old AMD GART IOMMU support"
        select SWIOTLB
        depends on X86_64 && PCI && AMD_NB
        ---help---
-         Support for full DMA access of devices with 32bit memory access only
-         on systems with more than 3GB. This is usually needed for USB,
-         sound, many IDE/SATA chipsets and some other devices.
-         Provides a driver for the AMD Athlon64/Opteron/Turion/Sempron GART
-         based hardware IOMMU and a software bounce buffer based IOMMU used
-         on Intel systems and as fallback.
-         The code is only active when needed (enough memory and limited
-         device) unless CONFIG_IOMMU_DEBUG or iommu=force is specified
-         too.
+         Provides a driver for older AMD Athlon64/Opteron/Turion/Sempron
+         GART based hardware IOMMUs.
+
+         The GART supports full DMA access for devices with 32-bit access
+         limitations, on systems with more than 3 GB. This is usually needed
+         for USB, sound, many IDE/SATA chipsets and some other devices.
+
+         Newer systems typically have a modern AMD IOMMU, supported via
+         the CONFIG_AMD_IOMMU=y config option.
+
+         In normal configurations this driver is only active when needed:
+         there's more than 3 GB of memory and the system contains a
+         32-bit limited device.
+
+         If unsure, say Y.
 
 config CALGARY_IOMMU
        bool "IBM Calgary IOMMU support"
@@ -1884,6 +1885,10 @@ config USE_PERCPU_NUMA_NODE_ID
        def_bool y
        depends on NUMA
 
+config ARCH_ENABLE_SPLIT_PMD_PTLOCK
+       def_bool y
+       depends on X86_64 || X86_PAE
+
 menu "Power management and ACPI options"
 
 config ARCH_HIBERNATION_HEADER