671
Debug
Breakpoint
on
Misaligned
Store
May
Cause
System
Hang
Description
A
misaligned
store
that
crosses
cache
lines
and
requires
an
address
translation
due
to
a
TLB
miss
may
cause
a
system
hang
if
the
trailing
cache
line
has
an
address
breakpoint
enabled
using
DR
7.
Potential
Effect
on
System
System
hang
.
Suggested
Workaround
Contact
your
AMD
representative
for
information
on
a
BIOS
update
.
This
workaround
has
a
performance
impact
when
certain
debug
breakpoints
are
enabled
.
System
developers
that
wish
to
enable
debug
breakpoints
without
this
workaround
may
first
set
MSRC
001_1000[17] = 1
b
.
AMD
recommends
this
workaround
be
enabled
with
AMD
Opteron
™
processors
.
For
all
other
processors
,
BIOS
should
disable
the
workaround
by
setting
MSRC
001_1000[17] = 1
b
.
Fix
Planned
Yes
48063
Rev
. 3.18
October
2012
Revision
Guide
for
AMD
Family
15
h
Models
00
h-
0
Fh
Processors
Product
Errata
57