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| author | H. Peter Anvin <hpa@zytor.com> | 2012-06-21 10:25:03 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2012-06-21 10:25:03 -0700 |
| commit | 9751d7627582fc1cc64625d63bde9528c14f1544 (patch) | |
| tree | 33b0b58eb47f4bda4478c2d658019a1d2986cad8 /tools | |
| parent | 2b1b712f050eaf0ac576591281446dc960c0afc5 (diff) | |
| download | linux-9751d7627582fc1cc64625d63bde9528c14f1544.tar.bz2 | |
x86-64, reboot: Be more paranoid in 64-bit reboot=bios
Be a bit more paranoid in the transition back to 16-bit mode. In
particular, in case the kernel is residing above the 4 GiB mark,
switch to the trampoline GDT, and make the jump after turning off
paging a far jump. In theory, none of this should matter, but it is
exactly the kind of things that broken SMM or virtualization software
could trip up on.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Link: http://lkml.kernel.org/r/tip-jopx7y6g6dbcx4tpal8q0jlr@git.kernel.org
Diffstat (limited to 'tools')
0 files changed, 0 insertions, 0 deletions