diff --git a/generators/boom b/generators/boom
index fac2c370c9..9e4269088e 160000
--- a/generators/boom
+++ b/generators/boom
@@ -1 +1 @@
-Subproject commit fac2c370c9deae97ca52aca6b34857e9ac0f6e9d
+Subproject commit 9e4269088ed7f83ad57b75d62082170c2c502952
diff --git a/generators/chipyard/src/main/scala/config/BoomConfigs.scala b/generators/chipyard/src/main/scala/config/BoomConfigs.scala
index 9e1f558ae1..aced79ae24 100644
--- a/generators/chipyard/src/main/scala/config/BoomConfigs.scala
+++ b/generators/chipyard/src/main/scala/config/BoomConfigs.scala
@@ -16,10 +16,12 @@ class MediumBoomConfig extends Config(
 
 class LargeBoomConfig extends Config(
   new boom.common.WithNLargeBooms(1) ++                          // large boom config
+  new chipyard.config.WithSystemBusWidth(128) ++
   new chipyard.config.AbstractConfig)
 
 class MegaBoomConfig extends Config(
   new boom.common.WithNMegaBooms(1) ++                           // mega boom config
+  new chipyard.config.WithSystemBusWidth(128) ++
   new chipyard.config.AbstractConfig)
 
 class DualSmallBoomConfig extends Config(
@@ -30,16 +32,19 @@ class HwachaLargeBoomConfig extends Config(
   new chipyard.config.WithHwachaTest ++
   new hwacha.DefaultHwachaConfig ++                              // use Hwacha vector accelerator
   new boom.common.WithNLargeBooms(1) ++
+  new chipyard.config.WithSystemBusWidth(128) ++
   new chipyard.config.AbstractConfig)
 
 class LoopbackNICLargeBoomConfig extends Config(
   new chipyard.harness.WithLoopbackNIC ++                        // drive NIC IOs with loopback
   new icenet.WithIceNIC ++                                       // build a NIC
   new boom.common.WithNLargeBooms(1) ++
+  new chipyard.config.WithSystemBusWidth(128) ++
   new chipyard.config.AbstractConfig)
 
 class DromajoBoomConfig extends Config(
   new chipyard.harness.WithSimDromajoBridge ++                   // attach Dromajo
   new chipyard.config.WithTraceIO ++                             // enable the traceio
   new boom.common.WithNSmallBooms(1) ++
+  new chipyard.config.WithSystemBusWidth(128) ++
   new chipyard.config.AbstractConfig)
diff --git a/generators/chipyard/src/main/scala/config/HeteroConfigs.scala b/generators/chipyard/src/main/scala/config/HeteroConfigs.scala
index 28cdc4cb20..8e8c7fe929 100644
--- a/generators/chipyard/src/main/scala/config/HeteroConfigs.scala
+++ b/generators/chipyard/src/main/scala/config/HeteroConfigs.scala
@@ -9,6 +9,7 @@ import freechips.rocketchip.config.{Config}
 class LargeBoomAndRocketConfig extends Config(
   new boom.common.WithNLargeBooms(1) ++                          // single-core boom
   new freechips.rocketchip.subsystem.WithNBigCores(1) ++         // single rocket-core
+  new chipyard.config.WithSystemBusWidth(128) ++
   new chipyard.config.AbstractConfig)
 
 // DOC include start: BoomAndRocketWithHwacha
@@ -17,6 +18,7 @@ class HwachaLargeBoomAndHwachaRocketConfig extends Config(
   new hwacha.DefaultHwachaConfig ++                          // add hwacha to all harts
   new boom.common.WithNLargeBooms(1) ++                      // add 1 boom core
   new freechips.rocketchip.subsystem.WithNBigCores(1) ++     // add 1 rocket core
+  new chipyard.config.WithSystemBusWidth(128) ++
   new chipyard.config.AbstractConfig)
 // DOC include end: BoomAndRocketWithHwacha
 
@@ -26,6 +28,7 @@ class LargeBoomAndHwachaRocketConfig extends Config(
   new hwacha.DefaultHwachaConfig ++                                     // set default hwacha config keys
   new boom.common.WithNLargeBooms(1) ++                                 // add 1 boom core
   new freechips.rocketchip.subsystem.WithNBigCores(1) ++                // add 1 rocket core
+  new chipyard.config.WithSystemBusWidth(128) ++
   new chipyard.config.AbstractConfig)
 
 // DOC include start: DualBoomAndRocketOneHwacha
@@ -35,18 +38,21 @@ class DualLargeBoomAndHwachaRocketConfig extends Config(
   new hwacha.DefaultHwachaConfig ++                                     // set default hwacha config keys
   new boom.common.WithNLargeBooms(2) ++                                 // add 2 boom cores
   new freechips.rocketchip.subsystem.WithNBigCores(1) ++                // add 1 rocket core
+  new chipyard.config.WithSystemBusWidth(128) ++
   new chipyard.config.AbstractConfig)
 // DOC include end: DualBoomAndRocketOneHwacha
 
 class DualLargeBoomAndDualRocketConfig extends Config(
   new boom.common.WithNLargeBooms(2) ++                   // add 2 boom cores
   new freechips.rocketchip.subsystem.WithNBigCores(2) ++  // add 2 rocket cores
+  new chipyard.config.WithSystemBusWidth(128) ++
   new chipyard.config.AbstractConfig)
 
 // DOC include start: DualBoomAndSingleRocket
 class DualLargeBoomAndSingleRocketConfig extends Config(
   new boom.common.WithNLargeBooms(2) ++                   // add 2 boom cores
   new freechips.rocketchip.subsystem.WithNBigCores(1) ++  // add 1 rocket core
+  new chipyard.config.WithSystemBusWidth(128) ++
   new chipyard.config.AbstractConfig)
 // DOC include end: DualBoomAndSingleRocket
 
@@ -54,4 +60,5 @@ class LargeBoomAndRocketWithControlCoreConfig extends Config(
   new freechips.rocketchip.subsystem.WithNSmallCores(1) ++ // Add a small "control" core
   new boom.common.WithNLargeBooms(1) ++                    // Add 1 boom core
   new freechips.rocketchip.subsystem.WithNBigCores(1) ++   // add 1 rocket core
+  new chipyard.config.WithSystemBusWidth(128) ++
   new chipyard.config.AbstractConfig)
diff --git a/generators/chipyard/src/main/scala/config/RocketConfigs.scala b/generators/chipyard/src/main/scala/config/RocketConfigs.scala
index a082990edd..1a3ac0eda8 100644
--- a/generators/chipyard/src/main/scala/config/RocketConfigs.scala
+++ b/generators/chipyard/src/main/scala/config/RocketConfigs.scala
@@ -42,18 +42,21 @@ class HwachaRocketConfig extends Config(
   new chipyard.config.WithHwachaTest ++
   new hwacha.DefaultHwachaConfig ++                              // use Hwacha vector accelerator
   new freechips.rocketchip.subsystem.WithNBigCores(1) ++
+  new chipyard.config.WithSystemBusWidth(128) ++
   new chipyard.config.AbstractConfig)
 
 // DOC include start: GemminiRocketConfig
 class GemminiRocketConfig extends Config(
   new gemmini.DefaultGemminiConfig ++                            // use Gemmini systolic array GEMM accelerator
   new freechips.rocketchip.subsystem.WithNBigCores(1) ++
+  new chipyard.config.WithSystemBusWidth(128) ++
   new chipyard.config.AbstractConfig)
 // DOC include end: GemminiRocketConfig
 
 class FPGemminiRocketConfig extends Config(
   new gemmini.GemminiFP32DefaultConfig ++                         // use FP32Gemmini systolic array GEMM accelerator
   new freechips.rocketchip.subsystem.WithNBigCores(1) ++
+  new chipyard.config.WithSystemBusWidth(128) ++
   new chipyard.config.AbstractConfig)
 
 
diff --git a/generators/gemmini b/generators/gemmini
index c47cb7f3eb..350b3196ba 160000
--- a/generators/gemmini
+++ b/generators/gemmini
@@ -1 +1 @@
-Subproject commit c47cb7f3eb5c18390f176f3a53c43c8546d487d2
+Subproject commit 350b3196bab88b75d29c61da70487231b3f2249c
diff --git a/generators/hwacha b/generators/hwacha
index 7cc6354351..b0795a3aaf 160000
--- a/generators/hwacha
+++ b/generators/hwacha
@@ -1 +1 @@
-Subproject commit 7cc6354351457c6b5bf186cdd34297ee5caeb22a
+Subproject commit b0795a3aafd3b22b00061c1c3e2e710d73b4f112