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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-06-05 07:46:15 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-06-05 07:46:15 -0700 |
| commit | 2071b3e34fd33e496ebd7b90331ac5b3b0ac3b81 (patch) | |
| tree | aeee17f8994ffaa234354cfe70d664f85b331247 /Documentation/x86 | |
| parent | 9df0fe64ebbdd85dd871cb8d52c16efe5ec45319 (diff) | |
| parent | e6ab9a20e73e790d47e6aa231fcf66f27b6ce3d4 (diff) | |
| download | lwn-2071b3e34fd33e496ebd7b90331ac5b3b0ac3b81.tar.gz lwn-2071b3e34fd33e496ebd7b90331ac5b3b0ac3b81.zip | |
Merge branch 'x86/espfix' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next
Pull x86-64 espfix changes from Peter Anvin:
"This is the espfix64 code, which fixes the IRET information leak as
well as the associated functionality problem. With this code applied,
16-bit stack segments finally work as intended even on a 64-bit
kernel.
Consequently, this patchset also removes the runtime option that we
added as an interim measure.
To help the people working on Linux kernels for very small systems,
this patchset also makes these compile-time configurable features"
* 'x86/espfix' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
Revert "x86-64, modify_ldt: Make support for 16-bit segments a runtime option"
x86, espfix: Make it possible to disable 16-bit support
x86, espfix: Make espfix64 a Kconfig option, fix UML
x86, espfix: Fix broken header guard
x86, espfix: Move espfix definitions into a separate header file
x86-32, espfix: Remove filter for espfix32 due to race
x86-64, espfix: Don't leak bits 31:16 of %esp returning to 16-bit stack
Diffstat (limited to 'Documentation/x86')
| -rw-r--r-- | Documentation/x86/x86_64/mm.txt | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/Documentation/x86/x86_64/mm.txt b/Documentation/x86/x86_64/mm.txt index c584a51add15..afe68ddbe6a4 100644 --- a/Documentation/x86/x86_64/mm.txt +++ b/Documentation/x86/x86_64/mm.txt @@ -12,6 +12,8 @@ ffffc90000000000 - ffffe8ffffffffff (=45 bits) vmalloc/ioremap space ffffe90000000000 - ffffe9ffffffffff (=40 bits) hole ffffea0000000000 - ffffeaffffffffff (=40 bits) virtual memory map (1TB) ... unused hole ... +ffffff0000000000 - ffffff7fffffffff (=39 bits) %esp fixup stacks +... unused hole ... ffffffff80000000 - ffffffffa0000000 (=512 MB) kernel text mapping, from phys 0 ffffffffa0000000 - ffffffffff5fffff (=1525 MB) module mapping space ffffffffff600000 - ffffffffffdfffff (=8 MB) vsyscalls |