x86: enable CONFIG_DEBUG_PAGEALLOC more widely

[sfrench/cifs-2.6.git] / arch / x86 / Kconfig.debug

diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
index 761ca7b5f120e6cb0d52d2352dc4bb26d23b74e3..347e33e5f3950b7d60a50e1ab2cefbab32dbcdd9 100644 (file)
--- a/arch/x86/Kconfig.debug
+++ b/arch/x86/Kconfig.debug
@@ -6,7 +6,7 @@ config TRACE_IRQFLAGS_SUPPORT
 source "lib/Kconfig.debug"
 
 config EARLY_PRINTK
-       bool "Early printk" if EMBEDDED && DEBUG_KERNEL && X86_32
+       bool "Early printk" if EMBEDDED
        default y
        help
          Write kernel log output directly into the VGA buffer or to a serial
@@ -40,22 +40,33 @@ comment "Page alloc debug is incompatible with Software Suspend on i386"
 
 config DEBUG_PAGEALLOC
        bool "Debug page memory allocations"
-       depends on DEBUG_KERNEL && !HIBERNATION && !HUGETLBFS
-       depends on X86_32
+       depends on DEBUG_KERNEL
        help
          Unmap pages from the kernel linear mapping after free_pages().
          This results in a large slowdown, but helps to find certain types
          of memory corruptions.
 
+config DEBUG_PER_CPU_MAPS
+       bool "Debug access to per_cpu maps"
+       depends on DEBUG_KERNEL
+       depends on X86_64_SMP
+       default n
+       help
+         Say Y to verify that the per_cpu map being accessed has
+         been setup.  Adds a fair amount of code to kernel memory
+         and decreases performance.
+
+         Say N if unsure.
+
 config DEBUG_RODATA
        bool "Write protect kernel read-only data structures"
+       default y
        depends on DEBUG_KERNEL
        help
          Mark the kernel read-only data as write-protected in the pagetables,
          in order to catch accidental (and incorrect) writes to such const
-         data. This option may have a slight performance impact because a
-         portion of the kernel code won't be covered by a 2MB TLB anymore.
-         If in doubt, say "N".
+         data. This is recommended so that we can catch kernel bugs sooner.
+         If in doubt, say "Y".
 
 config 4KSTACKS
        bool "Use 4Kb for kernel stacks instead of 8Kb"
@@ -75,8 +86,7 @@ config X86_FIND_SMP_CONFIG
 
 config X86_MPPARSE
        def_bool y
-       depends on X86_LOCAL_APIC && !X86_VISWS
-       depends on X86_32
+       depends on (X86_32 && (X86_LOCAL_APIC && !X86_VISWS)) || X86_64
 
 config DOUBLEFAULT
        default y
@@ -112,4 +122,91 @@ config IOMMU_LEAK
          Add a simple leak tracer to the IOMMU code. This is useful when you
          are debugging a buggy device driver that leaks IOMMU mappings.
 
+#
+# IO delay types:
+#
+
+config IO_DELAY_TYPE_0X80
+       int
+       default "0"
+
+config IO_DELAY_TYPE_0XED
+       int
+       default "1"
+
+config IO_DELAY_TYPE_UDELAY
+       int
+       default "2"
+
+config IO_DELAY_TYPE_NONE
+       int
+       default "3"
+
+choice
+       prompt "IO delay type"
+       default IO_DELAY_0XED
+
+config IO_DELAY_0X80
+       bool "port 0x80 based port-IO delay [recommended]"
+       help
+         This is the traditional Linux IO delay used for in/out_p.
+         It is the most tested hence safest selection here.
+
+config IO_DELAY_0XED
+       bool "port 0xed based port-IO delay"
+       help
+         Use port 0xed as the IO delay. This frees up port 0x80 which is
+         often used as a hardware-debug port.
+
+config IO_DELAY_UDELAY
+       bool "udelay based port-IO delay"
+       help
+         Use udelay(2) as the IO delay method. This provides the delay
+         while not having any side-effect on the IO port space.
+
+config IO_DELAY_NONE
+       bool "no port-IO delay"
+       help
+         No port-IO delay. Will break on old boxes that require port-IO
+         delay for certain operations. Should work on most new machines.
+
+endchoice
+
+if IO_DELAY_0X80
+config DEFAULT_IO_DELAY_TYPE
+       int
+       default IO_DELAY_TYPE_0X80
+endif
+
+if IO_DELAY_0XED
+config DEFAULT_IO_DELAY_TYPE
+       int
+       default IO_DELAY_TYPE_0XED
+endif
+
+if IO_DELAY_UDELAY
+config DEFAULT_IO_DELAY_TYPE
+       int
+       default IO_DELAY_TYPE_UDELAY
+endif
+
+if IO_DELAY_NONE
+config DEFAULT_IO_DELAY_TYPE
+       int
+       default IO_DELAY_TYPE_NONE
+endif
+
+config DEBUG_BOOT_PARAMS
+       bool "Debug boot parameters"
+       depends on DEBUG_KERNEL
+       depends on DEBUG_FS
+       help
+         This option will cause struct boot_params to be exported via debugfs.
+
+config CPA_DEBUG
+       bool "CPA self test code"
+       depends on DEBUG_KERNEL
+       help
+         Do change_page_attr self tests at boot.
+
 endmenu