Functional
Characteristics
Logical
partitions
are
defined,
and
the
I/O
resources
of
the
overall
physical
computing
system
are
pre-allocated
by
the
security
administrator.
I/O
allocation
is
an
integral
part
of
the
process
of
defining
a
total
system
configuration,
and
must
be
completely
performed
before
that
system
configuration
can
be
initialized.
This
pre-allocation
is
done
by
executing
the
Input/Output
Configuration
Program
(IOCP)
or
Hardware
Configuration
Definition
(HCD)
to
create
a
hardware-specific
data
set,
called
an
Input/Output
Configuration
Data
Set
(IOCDS),
of
the
I/O
resources
and
their
allocation
to
specific
logical
partitions.
LPAR
allocates
an
entire
resource,
such
as
an
I/O
channel
path
or
a
contiguous
region
of
storage.
At
no
time
is
any
real
resource
allocated
to
more
than
one
logical
partition.
Each
complete
I/O
resource
allocation
is
called
a
configuration
.
During
the
period
between
processor
initializations,
several
IOCDS
configurations
can
be
stored,
but
only
one
is
in
effect
at
any
time.
The
configuration
becomes
effective
as
part
of
the
power-on
reset
sequence.
In
order
to
change
the
active
configuration
it
is
necessary
to
perform
an
activation
of
the
hardware.
The
preceding
paragraph
deliberately
omits
any
discussion
of
Dynamic
I/O
Configuration,
Dynamic
CHPID
management,
Reconfigurable
channel
paths
(CHPIDs),
I/O
resource
sharing
using
Multiple
Image
Facility
(MIF)
or
Intelligent
Resource
Director
(IRD),
because
each
of
them
has
characteristics
that,
if
inappropriately
used,
can
compromise
the
secure
consolidation
capability
of
PR/SM.
Cautions
and
requirements
relating
to
their
use
are
included
throughout
this
appendix.
The
reminder
of
the
logical
partition’s
resources
are
defined
by
the
security
administrator
prior
to
the
activation
of
the
logical
partition.
These
resources
include
storage
size,
number
of
logical
processors,
scheduling
parameters,
and
security
controls,
which
can
be
specified
by
the
security
administrator
using
the
appropriate
interfaces
on
the
HMC/SE.
Many
of
the
control
and
security
parameters
can
be
changed
at
any
time
and
will
take
effect
dynamically
with
few
exceptions
(e.g.,
specifying
dedicated
processors
for
a
partition
will
only
take
effect
if
the
partition
is
not
yet
activated.)
Logical
partition
definitions
take
effect
at
logical
partition
activation,
and
generally
are
static
while
the
partition
they
pertain
to
is
active.
When
a
resource
is
allocated
to
a
logical
partition,
it
is
set
to
its
architecturally-defined
reset
state.
Channel
paths
are
reset,
main
and
expanded
storage
is
zeroed.
Trusted
Configuration
This
section
describes
the
actions
the
Security
Administrator
must
take
to
help
ensure
that
the
computer
system
is
configured
for
a
secure
mode
of
operation.
The
contents
of
this
section
specify
the
configuration
of
the
evaluated
product.
Any
deviation
from
the
specified
configuration
will
not
be
consistent
with
that
of
the
evaluated
product
and
may
result
in
partitions
that
do
not
provide
strict
separation.
Subsequent
sections
in
this
document
detail
the
security
related
characteristics
of
the
evaluated
product
as
well
as
security
configurations
that
were
not
included
in
the
evaluation.
These
details
are
provided
to
explain
and
highlight
the
differences
between
the
various
security
settings.
Nevertheless,
to
insure
strict
separation
of
partitions,
only
the
configuration
specified
in
this
section
should
be
used.
Note:
All
configuration
requirements
listed
in
subsequent
sections
are
mandatory
regardless
of
whether
the
term
must
or
should
is
used.
B-2
PR/SM
Planning
Guide
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