Messages in this thread |  | | Date | Thu, 21 Sep 2000 09:50:53 +0100 (BST) | From | Tigran Aivazian <> | Subject | cpu reset on laptops and microcode update. |
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Hi guys,
A long time ago I noticed a curious feature on my Dell Latitude CPx H-450GT laptop - rebooting it via "shutdown -r now" (and therefore going through BIOS) does not discard the microcode applied to the CPU. But I would expect it to be discarded as prescribed by Intel manuals, on #RESET.
Does it mean that rebooting a laptop does not actually ever reset the CPU? (this would imply that the BIOS is also a protected mode software?)
Of course, doing "shutdown -h now" and switching off the power does discard the microcode as expected.
Any thoughts? I post on linux-kernel because, potentially, your thoughts may become relevant to the content of arch/i386/kernel/microcode.c which is part of Linux kernel :)
Regards, Tigran
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