745
Processor
May
Incorrectly
Report
Cache
Sharing
Property
in
CPUID
Topology
Description
On
processor
models
that
have
a
single
core
per
compute-unit
(
Compute
Unit
Status
Register
[
DualCore
],
D
18
F
5
x
80[16]
is
0
b
),
CPUID
Fn
8000_001
D
_
EAX
_
x
1[
NumSharingCache
,
bits
25:15]
and
CPUID
Fn
8000_001
D
_
EAX
_
x
2[
NumSharingCache
,
bits
25:15]
incorrectly
report
that
the
instruction
cache
and
the
L
2
cache
as
being
shared
between
two
processor
cores
.
On
the
above-mentioned
processor
models
,
the
instruction
cache
and
the
L
2
cache
are
not
shared
and
software
would
not
find
two
processor
cores
that
reported
the
same
Compute
Unit
ID
(
CPUID
Fn
8000_001
E
_
EBX
[
ComputeUnitID
,
bits
7:0]).
Potential
Effect
on
System
Software
may
incorrectly
observe
the
topology
of
the
instruction
cache
and
the
L
2
cache
.
Suggested
Workaround
None
required
.
Fix
Planned
Yes
48063
Rev
. 3.18
October
2012
Revision
Guide
for
AMD
Family
15
h
Models
00
h-
0
Fh
Processors
Product
Errata
89