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| author | H. Peter Anvin <hpa@linux.intel.com> | 2012-05-08 20:22:36 +0200 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2012-05-08 20:48:03 +0200 |
| commit | 968ff9ee56f1e3ed4ff4a6d10185865dc77d8f7e (patch) | |
| tree | 203601668b2e0ee01b9acdc19ef4732c46c0fe72 /README | |
| parent | x86, realmode: Remove indirect jumps in trampoline_64.S (diff) | |
| download | linux-968ff9ee56f1e3ed4ff4a6d10185865dc77d8f7e.tar.xz linux-968ff9ee56f1e3ed4ff4a6d10185865dc77d8f7e.zip | |
x86, realmode: Remove indirect jumps in trampoline_32 and wakeup_asm
Remove indirect jumps in trampoline_32.S and the 32-bit part of
wakeup_asm.S. There exist systems which are known to do weird
things if an SMI comes in right after a mode switch, and the
safest way to deal with it is to always follow with a simple
absolute far jump. In the 64-bit code we then to a register
indirect near jump; follow that pattern for the 32-bit code.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Link: http://lkml.kernel.org/r/1336501366-28617-14-git-send-email-jarkko.sakkinen@intel.com
Diffstat (limited to 'README')
0 files changed, 0 insertions, 0 deletions