FSP should set up MCS interleaving based on MRW and MTM

Two attributes are involved with MCS interleaving, ATTR_MSS_INTERLEAVE_ENABLE
and ALL_MCS_IN_INTERLEAVING_GROUP. These values come from the MRW, but are
dependent on Machine-Type-Model (MTM), therefore the FSP will setup these
attributes, this change allows the FSP to write the attribute and removes
the workaround of setting of ALL_MCS_IN_INTERLEAVING_GROUP to zero in the
MRW parsing script

Change-Id: I53421048ef4a72a00ffd9e1988395df9761ed8b0
RTC: 66365
Reviewed-on: http://gfw160.aus.stglabs.ibm.com:8080/gerrit/8619
Tested-by: Jenkins Server
Reviewed-by: MATTHEW A. PLOETZ <maploetz@us.ibm.com>
Reviewed-by: Andrea Y. Ma <ayma@us.ibm.com>
Reviewed-by: A. Patrick Williams III <iawillia@us.ibm.com>

2 files changed, 23 insertions, 9 deletions

diff --git a/src/usr/targeting/common/genHwsvMrwXml.pl b/src/usr/targeting/common/genHwsvMrwXml.pl
index 6aeebfd0a..b101b4bbd 100755
--- a/src/usr/targeting/common/genHwsvMrwXml.pl
+++ b/src/usr/targeting/common/genHwsvMrwXml.pl
@@ -118,10 +118,6 @@ my $reqPol = $sysPolicy->{"required-policy-settings"};
 
 my @systemAttr; # Repeated {ATTR, VAL, ATTR, VAL, ATTR, VAL...}
 
-#@TODO RTC: 66365
-# Setting ALL_MCS_IN_INTERLEAVING_GROUP to zero. Need to replace with:
-# $reqPol->{'all_mcs_in_interleaving_group"}
-
 #No mirroring supported yet so the policy is just based on multi-node or not
 my $placement = 0x0; #NORMAL
 if ($sysname eq "brazos")
@@ -136,7 +132,6 @@ push @systemAttr,
     "FREQ_PROC_REFCLOCK_KHZ",
         $reqPol->{'processor-refclock-frequency-khz'}->{content},
     "FREQ_MEM_REFCLOCK", $reqPol->{'memory-refclock-frequency'}->{content},
-    "ALL_MCS_IN_INTERLEAVING_GROUP", "0",
     "BOOT_FREQ_MHZ", $reqPol->{'boot-frequency'}->{content},
     "FREQ_A", $reqPol->{'proc_a_frequency'}->{content},
     "FREQ_PB", $reqPol->{'proc_pb_frequency'}->{content},
diff --git a/src/usr/targeting/common/xmltohb/attribute_types.xml b/src/usr/targeting/common/xmltohb/attribute_types.xml
index c0bbe00db..1537292d4 100644
--- a/src/usr/targeting/common/xmltohb/attribute_types.xml
+++ b/src/usr/targeting/common/xmltohb/attribute_types.xml
@@ -1693,13 +1693,22 @@
     <description>
         System attribute.
         If all MCS chiplets are in an interleaving group (1=true, 0=false).
-        If true the SMP fabric is setup in normal mode.
-        If false the SMP fabric is setup in checkerboard mode.
+        - If true the SMP fabric is setup in normal mode and multiple MCSs
+          are grouped (disallowing systems with memory only under 1 MCS
+          (i.e. systems with a single C-DIMM))
+        - If false the SMP fabric is setup in checkerboard mode.
         Provided by the Machine Readable Workbook.
+        This attribute is based on Machine-Type-Model (MTM) and is setup by
+          the service processor.
     </description>
-    <simpleType><uint8_t></uint8_t></simpleType>
+    <simpleType>
+        <uint8_t>
+            <default>0x00</default>
+        </uint8_t>
+    </simpleType>
     <persistency>non-volatile</persistency>
     <readable/>
+    <writeable/>
     <hwpfToHbAttrMap>
         <id>ATTR_ALL_MCS_IN_INTERLEAVING_GROUP</id>
         <macro>DIRECT</macro>
@@ -8248,7 +8257,16 @@ firmware notes: Used as override attribute for pstate procedure
 
 <attribute>
     <id>MSS_INTERLEAVE_ENABLE</id>
-    <description>Used in the setting of groups.  It is a bit vector.  If the value  BITWISE_AND  1 = 1 then groups of 1 are enabled with special checkerboard modes needed, if the value  BITWISE_AND  2 = 2, then groups of 2 are possible; if value  BITWISE_AND  4, the groups of 4 are possible; if value  BITWISE_AND  8, the groups of 8 are possible.  If no groups can formed according to this input, then an error will be thrown.</description>
+    <description>
+        Used in the setting of MCS groups. It is a bitfield.
+        - If 0x01 is set then groups of 1 are enabled and the SMP fabric must
+          be set in checkerboard mode (see ALL_MCS_IN_INTERLEAVING_GROUP).
+        - If 0x02 is set then groups of 2 are possible.
+        - If 0x04 is set then groups of 4 are possible.
+        - If 0x08 is set then groups of 8 are possible.
+        This attribute is based on Machine-Type-Model (MTM) and is setup by
+          the service processor.
+    </description>
     <simpleType>
         <uint8_t>
             <default>0x07</default>
@@ -8256,6 +8274,7 @@ firmware notes: Used as override attribute for pstate procedure
     </simpleType>
     <persistency>non-volatile</persistency>
     <readable/>
+    <writeable/>
     <hwpfToHbAttrMap>
         <id>ATTR_MSS_INTERLEAVE_ENABLE</id>
         <macro>DIRECT</macro>