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Thomas Gleixner 1dddd25125 x86/kaslr: Fix the vaddr_end mess 
vaddr_end for KASLR is only documented in the KASLR code itself and is
adjusted depending on config options. So it's not surprising that a change
of the memory layout causes KASLR to have the wrong vaddr_end. This can map
arbitrary stuff into other areas causing hard to understand problems.

Remove the whole ifdef magic and define the start of the cpu_entry_area to
be the end of the KASLR vaddr range.

Add documentation to that effect.

Fixes: 92a0f81d89 ("x86/cpu_entry_area: Move it out of the fixmap")
Reported-by: Benjamin Gilbert <benjamin.gilbert@coreos.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Benjamin Gilbert <benjamin.gilbert@coreos.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: stable <stable@vger.kernel.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Garnier <thgarnie@google.com>,
Cc: Alexander Kuleshov <kuleshovmail@gmail.com>
Link: https://lkml.kernel.org/r/alpine.DEB.2.20.1801041320360.1771@nanos
 		2018-01-05 00:39:57 +01:00
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5level-paging.txt x86: Enable 5-level paging support via CONFIG_X86_5LEVEL=y 2017-07-21 10:05:19 +02:00
boot-options.txt x86/mce: Update bootlog description to reflect behavior on AMD 2017-06-14 07:32:10 +02:00
cpu-hotplug-spec
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fake-numa-for-cpusets Documenation: update cgroup's document path 2016-08-03 15:43:58 -06:00
machinecheck x86/Documentation: Fix various typos in Documentation/x86/ files 2016-07-01 10:00:10 +02:00
mm.txt x86/kaslr: Fix the vaddr_end mess 2018-01-05 00:39:57 +01:00
uefi.txt
…