diff --git a/misc/vm_configs/boards/ehl-crb-b/platform_acpi_info.h b/misc/vm_configs/boards/ehl-crb-b/platform_acpi_info.h
index 5ac5f6e4f..82fb15688 100644
--- a/misc/vm_configs/boards/ehl-crb-b/platform_acpi_info.h
+++ b/misc/vm_configs/boards/ehl-crb-b/platform_acpi_info.h
@@ -82,4 +82,8 @@
 /* PCI mmcfg base of MCFG */
 #define DEFAULT_PCI_MMCFG_BASE   0xc0000000UL
 
+/* PCI mmcfg bus number of MCFG */
+#define DEFAULT_PCI_MMCFG_START_BUS     0x0U
+#define DEFAULT_PCI_MMCFG_END_BUS       0xFFU
+
 #endif /* PLATFORM_ACPI_INFO_H */
diff --git a/misc/vm_configs/boards/nuc7i7dnb/platform_acpi_info.h b/misc/vm_configs/boards/nuc7i7dnb/platform_acpi_info.h
index 4f2a84492..17c20cccd 100644
--- a/misc/vm_configs/boards/nuc7i7dnb/platform_acpi_info.h
+++ b/misc/vm_configs/boards/nuc7i7dnb/platform_acpi_info.h
@@ -65,4 +65,8 @@
 /* PCI mmcfg base of MCFG */
 #define DEFAULT_PCI_MMCFG_BASE   0xe0000000UL
 
+/* PCI mmcfg bus number of MCFG */
+#define DEFAULT_PCI_MMCFG_START_BUS     0x0U
+#define DEFAULT_PCI_MMCFG_END_BUS       0xFFU
+
 #endif /* PLATFORM_ACPI_INFO_H */
diff --git a/misc/vm_configs/boards/whl-ipc-i5/platform_acpi_info.h b/misc/vm_configs/boards/whl-ipc-i5/platform_acpi_info.h
index bf6b1c3e5..8c63f7a37 100644
--- a/misc/vm_configs/boards/whl-ipc-i5/platform_acpi_info.h
+++ b/misc/vm_configs/boards/whl-ipc-i5/platform_acpi_info.h
@@ -69,4 +69,8 @@
 /* PCI mmcfg base of MCFG */
 #define DEFAULT_PCI_MMCFG_BASE   0xe0000000UL
 
+/* PCI mmcfg bus number of MCFG */
+#define DEFAULT_PCI_MMCFG_START_BUS     0x0U
+#define DEFAULT_PCI_MMCFG_END_BUS       0xFFU
+
 #endif /* PLATFORM_ACPI_INFO_H */
diff --git a/misc/vm_configs/boards/whl-ipc-i7/platform_acpi_info.h b/misc/vm_configs/boards/whl-ipc-i7/platform_acpi_info.h
index bf6b1c3e5..8c63f7a37 100644
--- a/misc/vm_configs/boards/whl-ipc-i7/platform_acpi_info.h
+++ b/misc/vm_configs/boards/whl-ipc-i7/platform_acpi_info.h
@@ -69,4 +69,8 @@
 /* PCI mmcfg base of MCFG */
 #define DEFAULT_PCI_MMCFG_BASE   0xe0000000UL
 
+/* PCI mmcfg bus number of MCFG */
+#define DEFAULT_PCI_MMCFG_START_BUS     0x0U
+#define DEFAULT_PCI_MMCFG_END_BUS       0xFFU
+
 #endif /* PLATFORM_ACPI_INFO_H */