Merge branches 'x86/apic', 'x86/cleanups', 'x86/cpufeature', 'x86/crashdump', 'x86...

[linux-2.6-omap-h63xx.git] / arch / x86 / Kconfig.debug

diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
index ae36bfa814e5b389d706b9cc3fa1d879f16abe8b..4ee768660f75098e465b1fb29fe79e384ce87cd1 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 disabled, 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.
@@ -41,6 +43,19 @@ config EARLY_PRINTK
          with klogd/syslogd or the X server. You should normally N here,
          unless you want to debug such a crash.
 
+config EARLY_PRINTK_DBGP
+       bool "Early printk via EHCI debug port"
+       default n
+       depends on EARLY_PRINTK && PCI
+       help
+         Write kernel log output directly into the EHCI debug port.
+
+         This is useful for kernel debugging when your machine crashes very
+         early before the console code is initialized. For normal operation
+         it is not recommended because it looks ugly and doesn't cooperate
+         with klogd/syslogd or the X server. You should normally N here,
+         unless you want to debug such a crash. You need usb debug device.
+
 config DEBUG_STACKOVERFLOW
        bool "Check for stack overflows"
        depends on DEBUG_KERNEL
@@ -99,18 +114,6 @@ config DEBUG_RODATA
          data. This is recommended so that we can catch kernel bugs sooner.
          If in doubt, say "Y".
 
-config DIRECT_GBPAGES
-       bool "Enable gbpages-mapped kernel pagetables"
-       depends on DEBUG_KERNEL && EXPERIMENTAL && X86_64
-       help
-         Enable gigabyte pages support (if the CPU supports it). This can
-         improve the kernel's performance a tiny bit by reducing TLB
-         pressure.
-
-         This is experimental code.
-
-         If in doubt, say "N".
-
 config DEBUG_RODATA_TEST
        bool "Testcase for the DEBUG_RODATA feature"
        depends on DEBUG_RODATA
@@ -287,16 +290,17 @@ 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
          do what it thinks is best, which is desirable for the gcc 3.x series of
          compilers. The gcc 4.x series have a rewritten inlining algorithm and
-         disabling this option will generate a smaller kernel there. Hopefully
-         this algorithm is so good that allowing gcc4 to make the decision can
-         become the default in the future, until then this option is there to
-         test gcc for this.
+         enabling this option will generate a smaller kernel there. Hopefully
+         this algorithm is so good that allowing gcc 4.x and above to make the
+         decision will become the default in the future. Until then this option
+         is there to test gcc for this.
+
+         If unsure, say N.
 
 endmenu