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authorH. Peter Anvin <hpa@zytor.com>2012-06-21 19:25:03 +0200
committerH. Peter Anvin <hpa@zytor.com>2012-06-21 19:25:03 +0200
commit9751d7627582fc1cc64625d63bde9528c14f1544 (patch)
tree33b0b58eb47f4bda4478c2d658019a1d2986cad8 /arch/sparc/include/asm/cmt.h
parentx86, reboot: Drop redundant write of reboot_mode (diff)
downloadlinux-9751d7627582fc1cc64625d63bde9528c14f1544.tar.xz
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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 'arch/sparc/include/asm/cmt.h')
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