mm: expose arch_mmap_rnd when available

[linux-2.6-block.git] / arch / x86 / Kconfig

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index b7d31ca5518744983c77bc8339f30756621dfea0..782ddbbc1c9a6fe417a68448dd86731126036b78 100644 (file)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -88,6 +88,7 @@ config X86
        select HAVE_ARCH_KASAN if X86_64 && SPARSEMEM_VMEMMAP
        select HAVE_USER_RETURN_NOTIFIER
        select ARCH_BINFMT_ELF_RANDOMIZE_PIE
+       select ARCH_HAS_ELF_RANDOMIZE
        select HAVE_ARCH_JUMP_LABEL
        select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
        select SPARSE_IRQ
@@ -99,6 +100,7 @@ config X86
        select IRQ_FORCED_THREADING
        select HAVE_BPF_JIT if X86_64
        select HAVE_ARCH_TRANSPARENT_HUGEPAGE
+       select HAVE_ARCH_HUGE_VMAP if X86_64 || (X86_32 && X86_PAE)
        select ARCH_HAS_SG_CHAIN
        select CLKEVT_I8253
        select ARCH_HAVE_NMI_SAFE_CMPXCHG
@@ -235,12 +237,10 @@ config ARCH_WANT_GENERAL_HUGETLB
        def_bool y
 
 config ZONE_DMA32
-       bool
-       default X86_64
+       def_bool y if X86_64
 
 config AUDIT_ARCH
-       bool
-       default X86_64
+       def_bool y if X86_64
 
 config ARCH_SUPPORTS_OPTIMIZED_INLINING
        def_bool y
@@ -279,6 +279,12 @@ config ARCH_SUPPORTS_UPROBES
 config FIX_EARLYCON_MEM
        def_bool y
 
+config PGTABLE_LEVELS
+       int
+       default 4 if X86_64
+       default 3 if X86_PAE
+       default 2
+
 source "init/Kconfig"
 source "kernel/Kconfig.freezer"
 
@@ -891,7 +897,8 @@ config UP_LATE_INIT
        depends on !SMP && X86_LOCAL_APIC
 
 config X86_UP_APIC
-       bool "Local APIC support on uniprocessors"
+       bool "Local APIC support on uniprocessors" if !PCI_MSI
+       default PCI_MSI
        depends on X86_32 && !SMP && !X86_32_NON_STANDARD
        ---help---
          A local APIC (Advanced Programmable Interrupt Controller) is an
@@ -903,10 +910,6 @@ config X86_UP_APIC
          performance counters), and the NMI watchdog which detects hard
          lockups.
 
-config X86_UP_APIC_MSI
-       def_bool y
-       select X86_UP_APIC if X86_32 && !SMP && !X86_32_NON_STANDARD && PCI_MSI
-
 config X86_UP_IOAPIC
        bool "IO-APIC support on uniprocessors"
        depends on X86_UP_APIC
@@ -925,8 +928,8 @@ config X86_LOCAL_APIC
        select GENERIC_IRQ_LEGACY_ALLOC_HWIRQ
 
 config X86_IO_APIC
-       def_bool X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_IOAPIC
-       depends on X86_LOCAL_APIC
+       def_bool y
+       depends on X86_LOCAL_APIC || X86_UP_IOAPIC
        select IRQ_DOMAIN
 
 config X86_REROUTE_FOR_BROKEN_BOOT_IRQS
@@ -1145,10 +1148,10 @@ config MICROCODE_OLD_INTERFACE
        depends on MICROCODE
 
 config MICROCODE_INTEL_EARLY
-       def_bool n
+       bool
 
 config MICROCODE_AMD_EARLY
-       def_bool n
+       bool
 
 config MICROCODE_EARLY
        bool "Early load microcode"
@@ -1300,14 +1303,14 @@ config ARCH_DMA_ADDR_T_64BIT
        def_bool y
        depends on X86_64 || HIGHMEM64G
 
-config DIRECT_GBPAGES
-       bool "Enable 1GB pages for kernel pagetables" if EXPERT
-       default y
-       depends on X86_64
+config X86_DIRECT_GBPAGES
+       def_bool y
+       depends on X86_64 && !DEBUG_PAGEALLOC && !KMEMCHECK
        ---help---
-         Allow the kernel linear mapping to use 1GB pages on CPUs that
-         support it. This can improve the kernel's performance a tiny bit by
-         reducing TLB pressure. If in doubt, say "Y".
+         Certain kernel features effectively disable kernel
+         linear 1 GB mappings (even if the CPU otherwise
+         supports them), so don't confuse the user by printing
+         that we have them enabled.
 
 # Common NUMA Features
 config NUMA
@@ -1747,14 +1750,11 @@ config KEXEC_VERIFY_SIG
        depends on KEXEC_FILE
        ---help---
          This option makes kernel signature verification mandatory for
-         kexec_file_load() syscall. If kernel is signature can not be
-         verified, kexec_file_load() will fail.
-
-         This option enforces signature verification at generic level.
-         One needs to enable signature verification for type of kernel
-         image being loaded to make sure it works. For example, enable
-         bzImage signature verification option to be able to load and
-         verify signatures of bzImage. Otherwise kernel loading will fail.
+         the kexec_file_load() syscall.
+
+         In addition to that option, you need to enable signature
+         verification for the corresponding kernel image type being
+         loaded in order for this to work.
 
 config KEXEC_BZIMAGE_VERIFY_SIG
        bool "Enable bzImage signature verification support"