device: Add support for multiple PCI segment groups
Add initial support for multiple PCI segment groups. Instead of
modifying secondary in the bus struct introduce a new segment_group
struct element and keep existing common code.
Since all platforms currently only use 1 segment this is not a
functional change. On platforms that support more than 1 segment the
segment has to be set when creating the PCI domain.
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: Ied3313c41896362dd989ee2ab1b1bcdced840aa8
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79927
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Martin Roth <martin.roth@amd.corp-partner.google.com>
diff --git a/src/acpi/acpi.c b/src/acpi/acpi.c
index 5e76916..0bd82cb 100644
--- a/src/acpi/acpi.c
+++ b/src/acpi/acpi.c
@@ -150,9 +150,14 @@
static unsigned long acpi_fill_mcfg(unsigned long current)
{
- current += acpi_create_mcfg_mmconfig((acpi_mcfg_mmconfig_t *)current,
- CONFIG_ECAM_MMCONF_BASE_ADDRESS, 0, 0,
- CONFIG_ECAM_MMCONF_BUS_NUMBER - 1);
+ for (int i = 0; i < PCI_SEGMENT_GROUP_COUNT; i++) {
+ current += acpi_create_mcfg_mmconfig((acpi_mcfg_mmconfig_t *)current,
+ CONFIG_ECAM_MMCONF_BASE_ADDRESS + i * PCI_PER_SEGMENT_GROUP_ECAM_SIZE,
+ i,
+ 0,
+ PCI_BUSES_PER_SEGMENT_GROUP - 1);
+ }
+
return current;
}
@@ -695,6 +700,7 @@
if (device->path.type == DEVICE_PATH_PCI) {
spmi->pci_device_flag = ACPI_IPMI_PCI_DEVICE_FLAG;
+ spmi->pci_segment_group = device->bus->segment_group;
spmi->pci_bus = device->bus->secondary;
spmi->pci_device = device->path.pci.devfn >> 3;
spmi->pci_function = device->path.pci.devfn & 0x7;
diff --git a/src/arch/x86/mpspec.c b/src/arch/x86/mpspec.c
index 64712c7..3b4c8ad 100644
--- a/src/arch/x86/mpspec.c
+++ b/src/arch/x86/mpspec.c
@@ -8,11 +8,16 @@
#include <cpu/x86/lapic.h>
#include <device/device.h>
#include <device/path.h>
+#include <device/pci_def.h>
#include <device/pci_ids.h>
#include <identity.h>
#include <stdint.h>
#include <string.h>
+#if CONFIG(ECAM_MMCONF_SUPPORT) && PCI_SEGMENT_GROUP_COUNT > 1
+#error "MPTable doesn't support systems with multiple PCI segment groups"
+#endif
+
/* Initialize the specified "mc" struct with initial values. */
void mptable_init(struct mp_config_table *mc)
{
diff --git a/src/device/Kconfig b/src/device/Kconfig
index 5202c18..e5b90bb 100644
--- a/src/device/Kconfig
+++ b/src/device/Kconfig
@@ -589,6 +589,13 @@
config ECAM_MMCONF_BUS_NUMBER
int
depends on ECAM_MMCONF_SUPPORT
+ help
+ Total number of PCI buses in the system across all segment groups.
+ The number needs to be a power of 2. For values <= 256,
+ PCI_BUSES_PER_SEGMENT_GROUP is CONFIG_ECAM_MMCONF_BUS_NUMBER and
+ PCI_SEGMENT_GROUP_COUNT is 1. For values > 256,
+ PCI_BUSES_PER_SEGMENT_GROUP is 256 and PCI_SEGMENT_GROUP_COUNT is
+ CONFIG_ECAM_MMCONF_BUS_NUMBER / 256.
config ECAM_MMCONF_LENGTH
hex
@@ -597,6 +604,8 @@
default 0x04000000 if ECAM_MMCONF_BUS_NUMBER = 64
default 0x08000000 if ECAM_MMCONF_BUS_NUMBER = 128
default 0x10000000 if ECAM_MMCONF_BUS_NUMBER = 256
+ default 0x20000000 if ECAM_MMCONF_BUS_NUMBER = 512
+ default 0x80000000 if ECAM_MMCONF_BUS_NUMBER = 1024
default 0x0
config PCI_ALLOW_BUS_MASTER
diff --git a/src/device/device.c b/src/device/device.c
index a635e73..811b709 100644
--- a/src/device/device.c
+++ b/src/device/device.c
@@ -152,8 +152,8 @@
{
struct device *curdev;
- printk(BIOS_SPEW, "%s %s bus %d link: %d\n", dev_path(bus->dev),
- __func__, bus->secondary, bus->link_num);
+ printk(BIOS_SPEW, "%s %s segment group %d bus %d link: %d\n", dev_path(bus->dev),
+ __func__, bus->segment_group, bus->secondary, bus->link_num);
/* Walk through all devices and find which resources they need. */
for (curdev = bus->children; curdev; curdev = curdev->sibling) {
@@ -176,8 +176,8 @@
read_resources(link);
}
post_log_clear();
- printk(BIOS_SPEW, "%s %s bus %d link: %d done\n",
- dev_path(bus->dev), __func__, bus->secondary, bus->link_num);
+ printk(BIOS_SPEW, "%s %s segment group %d bus %d link: %d done\n",
+ dev_path(bus->dev), __func__, bus->segment_group, bus->secondary, bus->link_num);
}
struct device *vga_pri = NULL;
@@ -266,8 +266,8 @@
{
struct device *curdev;
- printk(BIOS_SPEW, "%s %s, bus %d link: %d\n",
- dev_path(bus->dev), __func__, bus->secondary, bus->link_num);
+ printk(BIOS_SPEW, "%s %s, segment group %d bus %d link: %d\n",
+ dev_path(bus->dev), __func__, bus->segment_group, bus->secondary, bus->link_num);
for (curdev = bus->children; curdev; curdev = curdev->sibling) {
if (!curdev->enabled || !curdev->resource_list)
@@ -282,8 +282,8 @@
curdev->ops->set_resources(curdev);
}
post_log_clear();
- printk(BIOS_SPEW, "%s %s, bus %d link: %d done\n",
- dev_path(bus->dev), __func__, bus->secondary, bus->link_num);
+ printk(BIOS_SPEW, "%s %s, segment group %d bus %d link: %d done\n",
+ dev_path(bus->dev), __func__, bus->segment_group, bus->secondary, bus->link_num);
}
/**
diff --git a/src/device/device_const.c b/src/device/device_const.c
index a63a629..c91c009 100644
--- a/src/device/device_const.c
+++ b/src/device/device_const.c
@@ -35,6 +35,7 @@
for (dev = all_devices; dev; dev = dev->next) {
if ((dev->path.type == DEVICE_PATH_PCI) &&
(dev->bus->secondary == bus) &&
+ (dev->bus->segment_group == 0) &&
(dev->path.pci.devfn == devfn)) {
result = dev;
break;
@@ -233,7 +234,7 @@
dev = dev->next;
continue;
}
- if (dev->bus->secondary == bus)
+ if (dev->bus->secondary == bus && dev->bus->segment_group == 0)
return pcidev_path_behind(dev->bus, devfn);
dev = dev->next;
}
diff --git a/src/device/device_util.c b/src/device/device_util.c
index b37d1d9..ac2d33c 100644
--- a/src/device/device_util.c
+++ b/src/device/device_util.c
@@ -97,7 +97,7 @@
case DEVICE_PATH_ROOT:
break;
case DEVICE_PATH_PCI:
- ret |= dev->bus->secondary << 8 | dev->path.pci.devfn;
+ ret |= dev->bus->segment_group << 16 | dev->bus->secondary << 8 | dev->path.pci.devfn;
break;
case DEVICE_PATH_PNP:
ret |= dev->path.pnp.port << 8 | dev->path.pnp.device;
@@ -168,7 +168,8 @@
break;
case DEVICE_PATH_PCI:
snprintf(buffer, sizeof(buffer),
- "PCI: %02x:%02x.%01x",
+ "PCI: %02x:%02x:%02x.%01x",
+ dev->bus->segment_group,
dev->bus->secondary,
PCI_SLOT(dev->path.pci.devfn),
PCI_FUNC(dev->path.pci.devfn));
@@ -525,7 +526,8 @@
if (dev->link_list && (resource->flags & IORESOURCE_PCI_BRIDGE)) {
snprintf(buf, sizeof(buf),
- "bus %02x ", dev->link_list->secondary);
+ "seg %02x bus %02x ", dev->link_list->segment_group,
+ dev->link_list->secondary);
}
printk(BIOS_DEBUG, "%s %02lx <- [0x%016llx - 0x%016llx] size 0x%08llx "
"gran 0x%02x %s%s%s\n", dev_path(dev), resource->index,
@@ -982,5 +984,5 @@
bool is_pci_dev_on_bus(const struct device *pci, unsigned int bus)
{
- return is_pci(pci) && pci->bus->secondary == bus;
+ return is_pci(pci) && pci->bus->segment_group == 0 && pci->bus->secondary == bus;
}
diff --git a/src/device/pci_device.c b/src/device/pci_device.c
index b356c26..acdad42 100644
--- a/src/device/pci_device.c
+++ b/src/device/pci_device.c
@@ -846,6 +846,12 @@
{
static int should_run = -1;
+ if (dev->bus->segment_group) {
+ printk(BIOS_ERR, "Only option ROMs of devices in first PCI segment group can "
+ "be run.\n");
+ return 0;
+ }
+
if (CONFIG(VENDORCODE_ELTAN_VBOOT))
if (rom != NULL)
if (!verified_boot_should_run_oprom(rom))
@@ -1314,7 +1320,8 @@
*/
unsigned int pci_match_simple_dev(struct device *dev, pci_devfn_t sdev)
{
- return dev->bus->secondary == PCI_DEV2SEGBUS(sdev) &&
+ return dev->bus->secondary == PCI_DEV2BUS(sdev) &&
+ dev->bus->segment_group == PCI_DEV2SEG(sdev) &&
dev->path.pci.devfn == PCI_DEV2DEVFN(sdev);
}
@@ -1428,7 +1435,8 @@
struct device *dev, **prev;
int once = 0;
- printk(BIOS_DEBUG, "PCI: %s for bus %02x\n", __func__, bus->secondary);
+ printk(BIOS_DEBUG, "PCI: %s for segment group %02x bus %02x\n", __func__,
+ bus->segment_group, bus->secondary);
/* Maximum sane devfn is 0xFF. */
if (max_devfn > 0xff) {
@@ -1549,7 +1557,8 @@
link->subordinate = link->secondary + dev->hotplug_buses;
link->max_subordinate = parent->max_subordinate
? parent->max_subordinate
- : (CONFIG_ECAM_MMCONF_BUS_NUMBER - 1);
+ : (PCI_BUSES_PER_SEGMENT_GROUP - 1);
+ link->segment_group = parent->segment_group;
}
if (link->secondary > link->max_subordinate)
diff --git a/src/device/pci_rom.c b/src/device/pci_rom.c
index 2592f83..cc1e5d1 100644
--- a/src/device/pci_rom.c
+++ b/src/device/pci_rom.c
@@ -230,6 +230,10 @@
printk(BIOS_ERR, "%s failed\n", __func__);
return current;
}
+ if (device->bus->segment_group) {
+ printk(BIOS_ERR, "VFCT only supports GPU in first PCI segment group.\n");
+ return current;
+ }
printk(BIOS_DEBUG, " Copying %sVBIOS image from %p\n",
rom == (struct rom_header *)
diff --git a/src/device/pcix_device.c b/src/device/pcix_device.c
index 5593357f..e40ed3b 100644
--- a/src/device/pcix_device.c
+++ b/src/device/pcix_device.c
@@ -110,8 +110,8 @@
pcix_tune_bus(dev->link_list);
/* Print the PCI-X bus speed. */
- printk(BIOS_DEBUG, "PCI: %02x: %s\n", dev->link_list->secondary,
- pcix_speed(sstatus));
+ printk(BIOS_DEBUG, "PCI: %02x:%02x: %s\n", dev->link_list->segment_group,
+ dev->link_list->secondary, pcix_speed(sstatus));
}
/** Default device operations for PCI-X bridges */
diff --git a/src/include/device/device.h b/src/include/device/device.h
index 41ec528..50307e6 100644
--- a/src/include/device/device.h
+++ b/src/include/device/device.h
@@ -86,6 +86,7 @@
uint16_t secondary; /* secondary bus number */
uint16_t subordinate; /* subordinate bus number */
uint16_t max_subordinate; /* max subordinate bus number */
+ uint8_t segment_group; /* PCI segment group */
unsigned int reset_needed : 1;
unsigned int no_vga16 : 1; /* No support for 16-bit VGA decoding */
diff --git a/src/include/device/pci_def.h b/src/include/device/pci_def.h
index 8b90163..6d61e6d 100644
--- a/src/include/device/pci_def.h
+++ b/src/include/device/pci_def.h
@@ -591,9 +591,22 @@
#define PCI_SLOT(devfn) (((devfn) >> 3) & 0x1f)
#define PCI_FUNC(devfn) ((devfn) & 0x07)
+/*
+ * CONFIG_ECAM_MMCONF_BUS_NUMBER is a power of 2. For values <= 256,
+ * PCI_BUSES_PER_SEGMENT_GROUP is CONFIG_ECAM_MMCONF_BUS_NUMBER and PCI_SEGMENT_GROUP_COUNT
+ * is 1. For values > 256, PCI_BUSES_PER_SEGMENT_GROUP is 256 and PCI_SEGMENT_GROUP_COUNT is
+ * CONFIG_ECAM_MMCONF_BUS_NUMBER / 256.
+*/
+#define PCI_BUS_NUMBER_MASK 0xff
+#define PCI_SEGMENT_GROUP_COUNT (((CONFIG_ECAM_MMCONF_BUS_NUMBER - 1) >> 8) + 1)
+#define PCI_BUSES_PER_SEGMENT_GROUP (((CONFIG_ECAM_MMCONF_BUS_NUMBER - 1) & PCI_BUS_NUMBER_MASK) + 1)
+#define PCI_PER_SEGMENT_GROUP_ECAM_SIZE (256 * MiB)
+
/* Translation from PCI_DEV() to devicetree bus and path.pci.devfn. */
#define PCI_DEV2DEVFN(sdev) (((sdev)>>12) & 0xff)
#define PCI_DEV2SEGBUS(sdev) (((sdev)>>20) & 0xfff)
+#define PCI_DEV2BUS(sdev) (((sdev)>>20) & PCI_BUS_NUMBER_MASK)
+#define PCI_DEV2SEG(sdev) (((sdev)>>28) & 0xf)
/* Fields from within the device's class value. */
#define PCI_CLASS_GET_DEVICE(c) (c >> 8)
diff --git a/src/include/device/pci_ops.h b/src/include/device/pci_ops.h
index b5d4e23..de5f913 100644
--- a/src/include/device/pci_ops.h
+++ b/src/include/device/pci_ops.h
@@ -12,7 +12,8 @@
static __always_inline pci_devfn_t pcidev_bdf(const struct device *dev)
{
- return (dev->path.pci.devfn << 12) | (dev->bus->secondary << 20);
+ return (dev->path.pci.devfn << 12) | (dev->bus->secondary << 20) |
+ (dev->bus->segment_group << 28);
}
static __always_inline pci_devfn_t pcidev_assert(const struct device *dev)
diff --git a/src/lib/smbios.c b/src/lib/smbios.c
index 12fbdfa..51f1593 100644
--- a/src/lib/smbios.c
+++ b/src/lib/smbios.c
@@ -1114,7 +1114,7 @@
return smbios_write_type41(current, handle,
name, // name
instance_id, // inst
- 0, // segment group
+ dev->bus->segment_group, // segment group
dev->bus->secondary, //bus
PCI_SLOT(dev->path.pci.devfn), // device
PCI_FUNC(dev->path.pci.devfn), // func
@@ -1167,7 +1167,7 @@
0,
1,
0,
- 0,
+ dev->bus->segment_group,
dev->bus->secondary,
dev->path.pci.devfn);
}
diff --git a/src/northbridge/amd/pi/00730F01/northbridge.c b/src/northbridge/amd/pi/00730F01/northbridge.c
index dae2401..a4409fb 100644
--- a/src/northbridge/amd/pi/00730F01/northbridge.c
+++ b/src/northbridge/amd/pi/00730F01/northbridge.c
@@ -296,7 +296,7 @@
ivhd_11->capability_offset = 0x40;
ivhd_11->iommu_base_low = ivrs_agesa->ivhd.iommu_base_low;
ivhd_11->iommu_base_high = ivrs_agesa->ivhd.iommu_base_high;
- ivhd_11->pci_segment_group = 0x0000;
+ ivhd_11->pci_segment_group = nb_dev->bus->segment_group;
ivhd_11->iommu_info = ivrs_agesa->ivhd.iommu_info;
ivhd_11->iommu_attributes.perf_counters =
(IOMMU_MMIO32(ivhd_11->iommu_base_low + 0x4000) >> 7) & 0xf;
@@ -364,7 +364,7 @@
ivrs->ivhd.capability_offset = 0x40;
ivrs->ivhd.iommu_base_low = ivrs_agesa->ivhd.iommu_base_low;
ivrs->ivhd.iommu_base_high = ivrs_agesa->ivhd.iommu_base_high;
- ivrs->ivhd.pci_segment_group = 0x0000;
+ ivrs->ivhd.pci_segment_group = nb_dev->bus->segment_group;
ivrs->ivhd.iommu_info = ivrs_agesa->ivhd.iommu_info;
ivrs->ivhd.iommu_feature_info = ivrs_agesa->ivhd.iommu_feature_info;
/* Enable EFR if supported */
diff --git a/src/soc/amd/common/block/acpi/ivrs.c b/src/soc/amd/common/block/acpi/ivrs.c
index 140968c..605c4f5 100644
--- a/src/soc/amd/common/block/acpi/ivrs.c
+++ b/src/soc/amd/common/block/acpi/ivrs.c
@@ -218,7 +218,7 @@
ivhd_40->capability_offset = pci_find_capability(iommu_dev, IOMMU_CAP_ID);
ivhd_40->iommu_base_low = ivhd->iommu_base_low;
ivhd_40->iommu_base_high = ivhd->iommu_base_high;
- ivhd_40->pci_segment_group = 0x0000;
+ ivhd_40->pci_segment_group = nb_dev->bus->segment_group;
ivhd_40->iommu_info = ivhd->iommu_info;
/* For type 40h bits 31:28 and 12:0 are reserved */
ivhd_40->iommu_attributes = ivhd->iommu_feature_info & 0xfffe000;
@@ -275,7 +275,7 @@
ivhd_11->capability_offset = pci_find_capability(iommu_dev, IOMMU_CAP_ID);
ivhd_11->iommu_base_low = ivhd->iommu_base_low;
ivhd_11->iommu_base_high = ivhd->iommu_base_high;
- ivhd_11->pci_segment_group = 0x0000;
+ ivhd_11->pci_segment_group = nb_dev->bus->segment_group;
ivhd_11->iommu_info = ivhd->iommu_info;
ivhd11_attr_ptr = (ivhd11_iommu_attr_t *)&ivhd->iommu_feature_info;
ivhd_11->iommu_attributes.perf_counters = ivhd11_attr_ptr->perf_counters;
@@ -365,7 +365,7 @@
ivhd->flags |= ((mmio_x18_value & MMIO_CTRL_HT_TUN_EN) ?
IVHD_FLAG_HT_TUN_EN : 0);
- ivhd->pci_segment_group = 0x0000;
+ ivhd->pci_segment_group = nb_dev->bus->segment_group;
ivhd->iommu_info = pci_read_config16(iommu_dev,
ivhd->capability_offset + 0x10) & 0x1F;
diff --git a/src/soc/amd/common/block/data_fabric/domain.c b/src/soc/amd/common/block/data_fabric/domain.c
index c2f1406..b827dd3 100644
--- a/src/soc/amd/common/block/data_fabric/domain.c
+++ b/src/soc/amd/common/block/data_fabric/domain.c
@@ -9,6 +9,7 @@
#include <cpu/amd/mtrr.h>
#include <cpu/cpu.h>
#include <device/device.h>
+#include <device/pci.h>
#include <device/pci_ops.h>
#include <types.h>
@@ -21,16 +22,16 @@
return;
}
- /* TODO: Implement support for more than one PCI segment group in coreboot */
- if (segment_group) {
- printk(BIOS_ERR, "coreboot currently only supports one PCI segment group.\n");
+ if (segment_group >= PCI_SEGMENT_GROUP_COUNT) {
+ printk(BIOS_ERR, "Skipping domain %u due to too large segment group %u.\n",
+ domain->path.domain.domain, segment_group);
return;
}
- /* TODO: Check if bus >= CONFIG_ECAM_MMCONF_BUS_NUMBER and return in that case */
+ /* TODO: Check if bus >= PCI_BUSES_PER_SEGMENT_GROUP and return in that case */
- /* Make sure to not report more than CONFIG_ECAM_MMCONF_BUS_NUMBER PCI buses */
- limit = MIN(limit, CONFIG_ECAM_MMCONF_BUS_NUMBER - 1);
+ /* Make sure to not report more than PCI_BUSES_PER_SEGMENT_GROUP PCI buses */
+ limit = MIN(limit, PCI_BUSES_PER_SEGMENT_GROUP - 1);
/* Set bus first number of PCI root */
domain->link_list->secondary = bus;
@@ -38,6 +39,7 @@
domain->link_list->subordinate = bus;
/* Tell allocator about maximum PCI bus number in domain */
domain->link_list->max_subordinate = limit;
+ domain->link_list->segment_group = segment_group;
pci_host_bridge_scan_bus(domain);
}
@@ -246,12 +248,13 @@
acpigen_write_resourcetemplate_header();
/* PCI bus number range in domain */
- printk(BIOS_DEBUG, "%s _CRS: adding busses [%x-%x]\n", acpi_device_name(domain),
- domain->link_list->secondary, domain->link_list->max_subordinate);
+ printk(BIOS_DEBUG, "%s _CRS: adding busses [%x-%x] in segment group %x\n",
+ acpi_device_name(domain), domain->link_list->secondary,
+ domain->link_list->max_subordinate, domain->link_list->segment_group);
acpigen_resource_producer_bus_number(domain->link_list->secondary,
domain->link_list->max_subordinate);
- if (domain->link_list->secondary == 0) {
+ if (domain->link_list->secondary == 0 && domain->link_list->segment_group == 0) {
/* ACPI 6.4.2.5 I/O Port Descriptor */
acpigen_write_io16(PCI_IO_CONFIG_INDEX, PCI_IO_CONFIG_LAST_PORT, 1,
PCI_IO_CONFIG_PORT_COUNT, 1);
@@ -287,7 +290,7 @@
acpigen_write_resourcetemplate_footer();
- acpigen_write_SEG(0);
+ acpigen_write_SEG(domain->link_list->segment_group);
acpigen_write_BBN(domain->link_list->secondary);
/* Scope */
diff --git a/src/soc/amd/genoa_poc/domain.c b/src/soc/amd/genoa_poc/domain.c
index f21cad5..dc37450 100644
--- a/src/soc/amd/genoa_poc/domain.c
+++ b/src/soc/amd/genoa_poc/domain.c
@@ -18,7 +18,7 @@
amd_pci_domain_read_resources(domain);
// We only want to add the DRAM memory map once
- if (domain->link_list->secondary == 0) {
+ if (domain->link_list->secondary == 0 && domain->link_list->segment_group == 0) {
/* 0x1000 is a large enough first index to be sure to not overlap with the
resources added by amd_pci_domain_read_resources */
add_opensil_memmap(domain, 0x1000);
diff --git a/src/soc/intel/xeon_sp/cpx/soc_acpi.c b/src/soc/intel/xeon_sp/cpx/soc_acpi.c
index 52afe45..07c6a17 100644
--- a/src/soc/intel/xeon_sp/cpx/soc_acpi.c
+++ b/src/soc/intel/xeon_sp/cpx/soc_acpi.c
@@ -46,7 +46,7 @@
struct iiostack_resource stack_info = {0};
/* Only add RTxx entries once. */
- if (device->bus->secondary != 0)
+ if (device->bus->secondary != 0 || device->bus->segment_group != 0)
return;
get_iiostack_info(&stack_info);
diff --git a/src/soc/intel/xeon_sp/uncore.c b/src/soc/intel/xeon_sp/uncore.c
index 66f63d5..c8e1c36 100644
--- a/src/soc/intel/xeon_sp/uncore.c
+++ b/src/soc/intel/xeon_sp/uncore.c
@@ -192,7 +192,7 @@
struct range_entry fsp_mem;
/* Only add dram resources once. */
- if (dev->bus->secondary != 0)
+ if (dev->bus->secondary != 0 || dev->bus->segment_group != 0)
return;
/* Read in the MAP registers and report their values. */