the following patch was just integrated into master:
commit ef6dfc1d0656f34331519fb97e5ec87784c4686d
Author: Stefan Reinauer <[email protected]>
Date: Wed May 2 16:41:55 2012 -0700
Fix register corruption during Intel Microcode update
Another bug in the Intel microcode update code that existed since we
switched
to LinuxBIOSv2 in 2004:
The inline assembly code that reads the CPU revision from an MSR after
running
cpuid(1) trashes registers EBX and ECX. Only ECX was mentioned in the
clobber
list. C code running after this function could silently access completely
wrong
data, which resulted in the wrong date being printed on microcode updates
(and
potentially other issues happening until the C code writes to EBX again)
Change-Id: Ida733fa1747565ec9824d3a37d08b1a73cd8355f
Signed-off-by: Stefan Reinauer <[email protected]>
Reviewed-By: Patrick Georgi <[email protected]> at Thu May 3 10:47:36
2012, giving +2
Build-Tested: build bot (Jenkins) at Thu May 3 03:37:28 2012, giving +1
See http://review.coreboot.org/996 for details.
-gerrit
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