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PR/38587 CVS commit: src/sys/arch/amd64/acpi
The following reply was made to PR port-amd64/38587; it has been noted by GNATS.
From: Joerg Sonnenberger <joerg%netbsd.org@localhost>
Subject: PR/38587 CVS commit: src/sys/arch/amd64/acpi
Date: Sun, 25 May 2008 17:20:29 +0000 (UTC)
Module Name: src
Committed By: joerg
Date: Sun May 25 17:20:29 UTC 2008
Random underdocumented CPU facts:
AMD K8 and newer will trap when enabling the NX support outside PAE
paging mode. The AMD64 wake code was restoring the MSR EFER to switch to
Long Mode and naturally didn't have paging enabled at that point.
While this works fine with Intel CPUs, it resulted in an immediate
reboot with AMD processors.
Fixed by a joint brain storming session of jmcneill@, cegger@ and
myself, based on some input from the hardware developers. This fixes
To generate a diff of this commit:
cvs rdiff -r1.6 -r1.7 src/sys/arch/amd64/acpi/acpi_wakecode.S
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
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