[Bug 192487] cpucontrol uses unsafe procedure to detect current microcode version
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Wed Oct 10 15:54:58 UTC 2018
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=192487
--- Comment #10 from commit-hook at freebsd.org ---
A commit references this bug:
Author: emaste
Date: Wed Oct 10 15:54:01 UTC 2018
New revision: 339287
URL: https://svnweb.freebsd.org/changeset/base/339287
Log:
MFC r333569: cpucontrol: improve Intel microcode revision check
According to the Intel SDM (Volme 3, 9.11.7) the BIOS signature MSR
should be zeroed before executing cpuid (although in practice it does
not seem to matter).
PR: 192487
Submitted by: Dan Lukes
Reported by: Henrique de Moraes Holschuh
Changes:
_U stable/11/
stable/11/usr.sbin/cpucontrol/intel.c
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