Merge branches 'x86/urgent', 'x86/amd-iommu', 'x86/apic', 'x86/cleanups', 'x86/core...

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

diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
index acc0271920f2e3d80be6a50bb882066727e297e5..85a87d2ac0c09940c9d0d6654345375417e3d378 100644 (file)
--- a/arch/x86/Kconfig.debug
+++ b/arch/x86/Kconfig.debug
@@ -5,13 +5,15 @@ config TRACE_IRQFLAGS_SUPPORT
 
 source "lib/Kconfig.debug"
 
-config NONPROMISC_DEVMEM
+config STRICT_DEVMEM
        bool "Filter access to /dev/mem"
        help
-         If this option is left off, you allow userspace access to all
+         If this option is left on, you allow userspace (root) access to all
          of memory, including kernel and userspace memory. Accidental
          access to this is obviously disastrous, but specific access can
-         be used by people debugging the kernel.
+         be used by people debugging the kernel. Note that with PAT support
+         enabled, even in this case there are restrictions on /dev/mem
+         use due to the cache aliasing requirements.
 
          If this option is switched on, the /dev/mem file only allows
          userspace access to PCI space and the BIOS code and data regions.
@@ -171,6 +173,33 @@ 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.
 
+config MMIOTRACE_HOOKS
+       bool
+
+config MMIOTRACE
+       bool "Memory mapped IO tracing"
+       depends on DEBUG_KERNEL && PCI
+       select TRACING
+       select MMIOTRACE_HOOKS
+       help
+         Mmiotrace traces Memory Mapped I/O access and is meant for
+         debugging and reverse engineering. It is called from the ioremap
+         implementation and works via page faults. Tracing is disabled by
+         default and can be enabled at run-time.
+
+         See Documentation/tracers/mmiotrace.txt.
+         If you are not helping to develop drivers, say N.
+
+config MMIOTRACE_TEST
+       tristate "Test module for mmiotrace"
+       depends on MMIOTRACE && m
+       help
+         This is a dumb module for testing mmiotrace. It is very dangerous
+         as it will write garbage to IO memory starting at a given address.
+         However, it should be safe to use on e.g. unused portion of VRAM.
+
+         Say N, unless you absolutely know what you are doing.
+
 #
 # IO delay types:
 #
@@ -260,7 +289,6 @@ config CPA_DEBUG
 
 config OPTIMIZE_INLINING
        bool "Allow gcc to uninline functions marked 'inline'"
-       depends on BROKEN
        help
          This option determines if the kernel forces gcc to inline the functions
          developers have marked 'inline'. Doing so takes away freedom from gcc to
@@ -271,5 +299,7 @@ config OPTIMIZE_INLINING
          become the default in the future, until then this option is there to
          test gcc for this.
 
+         If unsure, say N.
+
 endmenu