* [PATCH] x86: remove acpi_srat config
2008-07-03 21:35 [PATCH] x86/acpi: remove have_arch_parse_srat Yinghai Lu
@ 2008-07-03 23:17 ` Yinghai Lu
0 siblings, 0 replies; 2+ messages in thread
From: Yinghai Lu @ 2008-07-03 23:17 UTC (permalink / raw)
To: Ingo Molnar, Thomas Gleixner, H. Peter Anvin; +Cc: LKML
use ACPI_NUMA directly
and move srat_32.c to mm/
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index ebfcf8c..7301dfb 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -460,11 +460,6 @@ config MEMTEST
memtest=4, mean do 4 test patterns.
If you are unsure how to answer this question, answer Y.
-config ACPI_SRAT
- def_bool y
- depends on X86_32 && ACPI && NUMA && X86_GENERICARCH
- select ACPI_NUMA
-
config X86_SUMMIT_NUMA
def_bool y
depends on X86_32 && NUMA && X86_GENERICARCH
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index 70b9d5c..a927af1 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -73,7 +73,6 @@ obj-$(CONFIG_X86_SUMMIT_NUMA) += summit_32.o
obj-y += vsmp_64.o
obj-$(CONFIG_KPROBES) += kprobes.o
obj-$(CONFIG_MODULES) += module_$(BITS).o
-obj-$(CONFIG_ACPI_SRAT) += srat_32.o
obj-$(CONFIG_IMMEDIATE) += immediate.o
obj-$(CONFIG_EFI) += efi.o efi_$(BITS).o efi_stub_$(BITS).o
obj-$(CONFIG_DOUBLEFAULT) += doublefault_32.o
diff --git a/arch/x86/kernel/srat_32.c b/arch/x86/kernel/srat_32.c
deleted file mode 100644
index f41d67f..0000000
--- a/arch/x86/kernel/srat_32.c
+++ /dev/null
@@ -1,280 +0,0 @@
-/*
- * Some of the code in this file has been gleaned from the 64 bit
- * discontigmem support code base.
- *
- * Copyright (C) 2002, IBM Corp.
- *
- * All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
- * NON INFRINGEMENT. See the GNU General Public License for more
- * details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * Send feedback to Pat Gaughen <gone@us.ibm.com>
- */
-#include <linux/mm.h>
-#include <linux/bootmem.h>
-#include <linux/mmzone.h>
-#include <linux/acpi.h>
-#include <linux/nodemask.h>
-#include <asm/srat.h>
-#include <asm/topology.h>
-#include <asm/smp.h>
-#include <asm/e820.h>
-
-/*
- * proximity macros and definitions
- */
-#define NODE_ARRAY_INDEX(x) ((x) / 8) /* 8 bits/char */
-#define NODE_ARRAY_OFFSET(x) ((x) % 8) /* 8 bits/char */
-#define BMAP_SET(bmap, bit) ((bmap)[NODE_ARRAY_INDEX(bit)] |= 1 << NODE_ARRAY_OFFSET(bit))
-#define BMAP_TEST(bmap, bit) ((bmap)[NODE_ARRAY_INDEX(bit)] & (1 << NODE_ARRAY_OFFSET(bit)))
-/* bitmap length; _PXM is at most 255 */
-#define PXM_BITMAP_LEN (MAX_PXM_DOMAINS / 8)
-static u8 __initdata pxm_bitmap[PXM_BITMAP_LEN]; /* bitmap of proximity domains */
-
-#define MAX_CHUNKS_PER_NODE 3
-#define MAXCHUNKS (MAX_CHUNKS_PER_NODE * MAX_NUMNODES)
-struct node_memory_chunk_s {
- unsigned long start_pfn;
- unsigned long end_pfn;
- u8 pxm; // proximity domain of node
- u8 nid; // which cnode contains this chunk?
- u8 bank; // which mem bank on this node
-};
-static struct node_memory_chunk_s __initdata node_memory_chunk[MAXCHUNKS];
-
-static int __initdata num_memory_chunks; /* total number of memory chunks */
-static u8 __initdata apicid_to_pxm[MAX_APICID];
-
-int numa_off __initdata;
-int acpi_numa __initdata;
-
-static __init void bad_srat(void)
-{
- printk(KERN_ERR "SRAT: SRAT not used.\n");
- acpi_numa = -1;
- num_memory_chunks = 0;
-}
-
-static __init inline int srat_disabled(void)
-{
- return numa_off || acpi_numa < 0;
-}
-
-/* Identify CPU proximity domains */
-void __init
-acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *cpu_affinity)
-{
- if (srat_disabled())
- return;
- if (cpu_affinity->header.length !=
- sizeof(struct acpi_srat_cpu_affinity)) {
- bad_srat();
- return;
- }
-
- if ((cpu_affinity->flags & ACPI_SRAT_CPU_ENABLED) == 0)
- return; /* empty entry */
-
- /* mark this node as "seen" in node bitmap */
- BMAP_SET(pxm_bitmap, cpu_affinity->proximity_domain_lo);
-
- apicid_to_pxm[cpu_affinity->apic_id] = cpu_affinity->proximity_domain_lo;
-
- printk(KERN_DEBUG "CPU %02x in proximity domain %02x\n",
- cpu_affinity->apic_id, cpu_affinity->proximity_domain_lo);
-}
-
-/*
- * Identify memory proximity domains and hot-remove capabilities.
- * Fill node memory chunk list structure.
- */
-void __init
-acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *memory_affinity)
-{
- unsigned long long paddr, size;
- unsigned long start_pfn, end_pfn;
- u8 pxm;
- struct node_memory_chunk_s *p, *q, *pend;
-
- if (srat_disabled())
- return;
- if (memory_affinity->header.length !=
- sizeof(struct acpi_srat_mem_affinity)) {
- bad_srat();
- return;
- }
-
- if ((memory_affinity->flags & ACPI_SRAT_MEM_ENABLED) == 0)
- return; /* empty entry */
-
- pxm = memory_affinity->proximity_domain & 0xff;
-
- /* mark this node as "seen" in node bitmap */
- BMAP_SET(pxm_bitmap, pxm);
-
- /* calculate info for memory chunk structure */
- paddr = memory_affinity->base_address;
- size = memory_affinity->length;
-
- start_pfn = paddr >> PAGE_SHIFT;
- end_pfn = (paddr + size) >> PAGE_SHIFT;
-
-
- if (num_memory_chunks >= MAXCHUNKS) {
- printk(KERN_WARNING "Too many mem chunks in SRAT."
- " Ignoring %lld MBytes at %llx\n",
- size/(1024*1024), paddr);
- return;
- }
-
- /* Insertion sort based on base address */
- pend = &node_memory_chunk[num_memory_chunks];
- for (p = &node_memory_chunk[0]; p < pend; p++) {
- if (start_pfn < p->start_pfn)
- break;
- }
- if (p < pend) {
- for (q = pend; q >= p; q--)
- *(q + 1) = *q;
- }
- p->start_pfn = start_pfn;
- p->end_pfn = end_pfn;
- p->pxm = pxm;
-
- num_memory_chunks++;
-
- printk(KERN_DEBUG "Memory range %08lx to %08lx (type %x)"
- " in proximity domain %02x %s\n",
- start_pfn, end_pfn,
- memory_affinity->memory_type,
- pxm,
- ((memory_affinity->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE) ?
- "enabled and removable" : "enabled" ) );
-}
-
-/* Callback for SLIT parsing */
-void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
-{
-}
-
-void acpi_numa_arch_fixup(void)
-{
-}
-/*
- * The SRAT table always lists ascending addresses, so can always
- * assume that the first "start" address that you see is the real
- * start of the node, and that the current "end" address is after
- * the previous one.
- */
-static __init void node_read_chunk(int nid, struct node_memory_chunk_s *memory_chunk)
-{
- /*
- * Only add present memory as told by the e820.
- * There is no guarantee from the SRAT that the memory it
- * enumerates is present at boot time because it represents
- * *possible* memory hotplug areas the same as normal RAM.
- */
- if (memory_chunk->start_pfn >= max_pfn) {
- printk(KERN_INFO "Ignoring SRAT pfns: %08lx - %08lx\n",
- memory_chunk->start_pfn, memory_chunk->end_pfn);
- return;
- }
- if (memory_chunk->nid != nid)
- return;
-
- if (!node_has_online_mem(nid))
- node_start_pfn[nid] = memory_chunk->start_pfn;
-
- if (node_start_pfn[nid] > memory_chunk->start_pfn)
- node_start_pfn[nid] = memory_chunk->start_pfn;
-
- if (node_end_pfn[nid] < memory_chunk->end_pfn)
- node_end_pfn[nid] = memory_chunk->end_pfn;
-}
-
-int __init get_memcfg_from_srat(void)
-{
- int i, j, nid;
-
-
- if (srat_disabled())
- goto out_fail;
-
- if (num_memory_chunks == 0) {
- printk(KERN_WARNING
- "could not finy any ACPI SRAT memory areas.\n");
- goto out_fail;
- }
-
- /* Calculate total number of nodes in system from PXM bitmap and create
- * a set of sequential node IDs starting at zero. (ACPI doesn't seem
- * to specify the range of _PXM values.)
- */
- /*
- * MCD - we no longer HAVE to number nodes sequentially. PXM domain
- * numbers could go as high as 256, and MAX_NUMNODES for i386 is typically
- * 32, so we will continue numbering them in this manner until MAX_NUMNODES
- * approaches MAX_PXM_DOMAINS for i386.
- */
- nodes_clear(node_online_map);
- for (i = 0; i < MAX_PXM_DOMAINS; i++) {
- if (BMAP_TEST(pxm_bitmap, i)) {
- int nid = acpi_map_pxm_to_node(i);
- node_set_online(nid);
- }
- }
- BUG_ON(num_online_nodes() == 0);
-
- /* set cnode id in memory chunk structure */
- for (i = 0; i < num_memory_chunks; i++)
- node_memory_chunk[i].nid = pxm_to_node(node_memory_chunk[i].pxm);
-
- printk(KERN_DEBUG "pxm bitmap: ");
- for (i = 0; i < sizeof(pxm_bitmap); i++) {
- printk(KERN_CONT "%02x ", pxm_bitmap[i]);
- }
- printk(KERN_CONT "\n");
- printk(KERN_DEBUG "Number of logical nodes in system = %d\n",
- num_online_nodes());
- printk(KERN_DEBUG "Number of memory chunks in system = %d\n",
- num_memory_chunks);
-
- for (i = 0; i < MAX_APICID; i++)
- apicid_2_node[i] = pxm_to_node(apicid_to_pxm[i]);
-
- for (j = 0; j < num_memory_chunks; j++){
- struct node_memory_chunk_s * chunk = &node_memory_chunk[j];
- printk(KERN_DEBUG
- "chunk %d nid %d start_pfn %08lx end_pfn %08lx\n",
- j, chunk->nid, chunk->start_pfn, chunk->end_pfn);
- node_read_chunk(chunk->nid, chunk);
- e820_register_active_regions(chunk->nid, chunk->start_pfn,
- min(chunk->end_pfn, max_pfn));
- }
-
- for_each_online_node(nid) {
- unsigned long start = node_start_pfn[nid];
- unsigned long end = min(node_end_pfn[nid], max_pfn);
-
- memory_present(nid, start, end);
- node_remap_size[nid] = node_memmap_size_bytes(nid, start, end);
- }
- return 1;
-out_fail:
- printk(KERN_ERR "failed to get NUMA memory information from SRAT"
- " table\n");
- return 0;
-}
diff --git a/arch/x86/mm/Makefile b/arch/x86/mm/Makefile
index d673c82..f413159 100644
--- a/arch/x86/mm/Makefile
+++ b/arch/x86/mm/Makefile
@@ -20,5 +20,6 @@ obj-$(CONFIG_NUMA) += discontig_32.o
else
obj-$(CONFIG_NUMA) += numa_64.o
obj-$(CONFIG_K8_NUMA) += k8topology_64.o
-obj-$(CONFIG_ACPI_NUMA) += srat_64.o
endif
+obj-$(CONFIG_ACPI_NUMA) += srat_$(BITS).o
+
diff --git a/arch/x86/mm/srat_32.c b/arch/x86/mm/srat_32.c
new file mode 100644
index 0000000..f41d67f
--- /dev/null
+++ b/arch/x86/mm/srat_32.c
@@ -0,0 +1,280 @@
+/*
+ * Some of the code in this file has been gleaned from the 64 bit
+ * discontigmem support code base.
+ *
+ * Copyright (C) 2002, IBM Corp.
+ *
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Send feedback to Pat Gaughen <gone@us.ibm.com>
+ */
+#include <linux/mm.h>
+#include <linux/bootmem.h>
+#include <linux/mmzone.h>
+#include <linux/acpi.h>
+#include <linux/nodemask.h>
+#include <asm/srat.h>
+#include <asm/topology.h>
+#include <asm/smp.h>
+#include <asm/e820.h>
+
+/*
+ * proximity macros and definitions
+ */
+#define NODE_ARRAY_INDEX(x) ((x) / 8) /* 8 bits/char */
+#define NODE_ARRAY_OFFSET(x) ((x) % 8) /* 8 bits/char */
+#define BMAP_SET(bmap, bit) ((bmap)[NODE_ARRAY_INDEX(bit)] |= 1 << NODE_ARRAY_OFFSET(bit))
+#define BMAP_TEST(bmap, bit) ((bmap)[NODE_ARRAY_INDEX(bit)] & (1 << NODE_ARRAY_OFFSET(bit)))
+/* bitmap length; _PXM is at most 255 */
+#define PXM_BITMAP_LEN (MAX_PXM_DOMAINS / 8)
+static u8 __initdata pxm_bitmap[PXM_BITMAP_LEN]; /* bitmap of proximity domains */
+
+#define MAX_CHUNKS_PER_NODE 3
+#define MAXCHUNKS (MAX_CHUNKS_PER_NODE * MAX_NUMNODES)
+struct node_memory_chunk_s {
+ unsigned long start_pfn;
+ unsigned long end_pfn;
+ u8 pxm; // proximity domain of node
+ u8 nid; // which cnode contains this chunk?
+ u8 bank; // which mem bank on this node
+};
+static struct node_memory_chunk_s __initdata node_memory_chunk[MAXCHUNKS];
+
+static int __initdata num_memory_chunks; /* total number of memory chunks */
+static u8 __initdata apicid_to_pxm[MAX_APICID];
+
+int numa_off __initdata;
+int acpi_numa __initdata;
+
+static __init void bad_srat(void)
+{
+ printk(KERN_ERR "SRAT: SRAT not used.\n");
+ acpi_numa = -1;
+ num_memory_chunks = 0;
+}
+
+static __init inline int srat_disabled(void)
+{
+ return numa_off || acpi_numa < 0;
+}
+
+/* Identify CPU proximity domains */
+void __init
+acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *cpu_affinity)
+{
+ if (srat_disabled())
+ return;
+ if (cpu_affinity->header.length !=
+ sizeof(struct acpi_srat_cpu_affinity)) {
+ bad_srat();
+ return;
+ }
+
+ if ((cpu_affinity->flags & ACPI_SRAT_CPU_ENABLED) == 0)
+ return; /* empty entry */
+
+ /* mark this node as "seen" in node bitmap */
+ BMAP_SET(pxm_bitmap, cpu_affinity->proximity_domain_lo);
+
+ apicid_to_pxm[cpu_affinity->apic_id] = cpu_affinity->proximity_domain_lo;
+
+ printk(KERN_DEBUG "CPU %02x in proximity domain %02x\n",
+ cpu_affinity->apic_id, cpu_affinity->proximity_domain_lo);
+}
+
+/*
+ * Identify memory proximity domains and hot-remove capabilities.
+ * Fill node memory chunk list structure.
+ */
+void __init
+acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *memory_affinity)
+{
+ unsigned long long paddr, size;
+ unsigned long start_pfn, end_pfn;
+ u8 pxm;
+ struct node_memory_chunk_s *p, *q, *pend;
+
+ if (srat_disabled())
+ return;
+ if (memory_affinity->header.length !=
+ sizeof(struct acpi_srat_mem_affinity)) {
+ bad_srat();
+ return;
+ }
+
+ if ((memory_affinity->flags & ACPI_SRAT_MEM_ENABLED) == 0)
+ return; /* empty entry */
+
+ pxm = memory_affinity->proximity_domain & 0xff;
+
+ /* mark this node as "seen" in node bitmap */
+ BMAP_SET(pxm_bitmap, pxm);
+
+ /* calculate info for memory chunk structure */
+ paddr = memory_affinity->base_address;
+ size = memory_affinity->length;
+
+ start_pfn = paddr >> PAGE_SHIFT;
+ end_pfn = (paddr + size) >> PAGE_SHIFT;
+
+
+ if (num_memory_chunks >= MAXCHUNKS) {
+ printk(KERN_WARNING "Too many mem chunks in SRAT."
+ " Ignoring %lld MBytes at %llx\n",
+ size/(1024*1024), paddr);
+ return;
+ }
+
+ /* Insertion sort based on base address */
+ pend = &node_memory_chunk[num_memory_chunks];
+ for (p = &node_memory_chunk[0]; p < pend; p++) {
+ if (start_pfn < p->start_pfn)
+ break;
+ }
+ if (p < pend) {
+ for (q = pend; q >= p; q--)
+ *(q + 1) = *q;
+ }
+ p->start_pfn = start_pfn;
+ p->end_pfn = end_pfn;
+ p->pxm = pxm;
+
+ num_memory_chunks++;
+
+ printk(KERN_DEBUG "Memory range %08lx to %08lx (type %x)"
+ " in proximity domain %02x %s\n",
+ start_pfn, end_pfn,
+ memory_affinity->memory_type,
+ pxm,
+ ((memory_affinity->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE) ?
+ "enabled and removable" : "enabled" ) );
+}
+
+/* Callback for SLIT parsing */
+void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
+{
+}
+
+void acpi_numa_arch_fixup(void)
+{
+}
+/*
+ * The SRAT table always lists ascending addresses, so can always
+ * assume that the first "start" address that you see is the real
+ * start of the node, and that the current "end" address is after
+ * the previous one.
+ */
+static __init void node_read_chunk(int nid, struct node_memory_chunk_s *memory_chunk)
+{
+ /*
+ * Only add present memory as told by the e820.
+ * There is no guarantee from the SRAT that the memory it
+ * enumerates is present at boot time because it represents
+ * *possible* memory hotplug areas the same as normal RAM.
+ */
+ if (memory_chunk->start_pfn >= max_pfn) {
+ printk(KERN_INFO "Ignoring SRAT pfns: %08lx - %08lx\n",
+ memory_chunk->start_pfn, memory_chunk->end_pfn);
+ return;
+ }
+ if (memory_chunk->nid != nid)
+ return;
+
+ if (!node_has_online_mem(nid))
+ node_start_pfn[nid] = memory_chunk->start_pfn;
+
+ if (node_start_pfn[nid] > memory_chunk->start_pfn)
+ node_start_pfn[nid] = memory_chunk->start_pfn;
+
+ if (node_end_pfn[nid] < memory_chunk->end_pfn)
+ node_end_pfn[nid] = memory_chunk->end_pfn;
+}
+
+int __init get_memcfg_from_srat(void)
+{
+ int i, j, nid;
+
+
+ if (srat_disabled())
+ goto out_fail;
+
+ if (num_memory_chunks == 0) {
+ printk(KERN_WARNING
+ "could not finy any ACPI SRAT memory areas.\n");
+ goto out_fail;
+ }
+
+ /* Calculate total number of nodes in system from PXM bitmap and create
+ * a set of sequential node IDs starting at zero. (ACPI doesn't seem
+ * to specify the range of _PXM values.)
+ */
+ /*
+ * MCD - we no longer HAVE to number nodes sequentially. PXM domain
+ * numbers could go as high as 256, and MAX_NUMNODES for i386 is typically
+ * 32, so we will continue numbering them in this manner until MAX_NUMNODES
+ * approaches MAX_PXM_DOMAINS for i386.
+ */
+ nodes_clear(node_online_map);
+ for (i = 0; i < MAX_PXM_DOMAINS; i++) {
+ if (BMAP_TEST(pxm_bitmap, i)) {
+ int nid = acpi_map_pxm_to_node(i);
+ node_set_online(nid);
+ }
+ }
+ BUG_ON(num_online_nodes() == 0);
+
+ /* set cnode id in memory chunk structure */
+ for (i = 0; i < num_memory_chunks; i++)
+ node_memory_chunk[i].nid = pxm_to_node(node_memory_chunk[i].pxm);
+
+ printk(KERN_DEBUG "pxm bitmap: ");
+ for (i = 0; i < sizeof(pxm_bitmap); i++) {
+ printk(KERN_CONT "%02x ", pxm_bitmap[i]);
+ }
+ printk(KERN_CONT "\n");
+ printk(KERN_DEBUG "Number of logical nodes in system = %d\n",
+ num_online_nodes());
+ printk(KERN_DEBUG "Number of memory chunks in system = %d\n",
+ num_memory_chunks);
+
+ for (i = 0; i < MAX_APICID; i++)
+ apicid_2_node[i] = pxm_to_node(apicid_to_pxm[i]);
+
+ for (j = 0; j < num_memory_chunks; j++){
+ struct node_memory_chunk_s * chunk = &node_memory_chunk[j];
+ printk(KERN_DEBUG
+ "chunk %d nid %d start_pfn %08lx end_pfn %08lx\n",
+ j, chunk->nid, chunk->start_pfn, chunk->end_pfn);
+ node_read_chunk(chunk->nid, chunk);
+ e820_register_active_regions(chunk->nid, chunk->start_pfn,
+ min(chunk->end_pfn, max_pfn));
+ }
+
+ for_each_online_node(nid) {
+ unsigned long start = node_start_pfn[nid];
+ unsigned long end = min(node_end_pfn[nid], max_pfn);
+
+ memory_present(nid, start, end);
+ node_remap_size[nid] = node_memmap_size_bytes(nid, start, end);
+ }
+ return 1;
+out_fail:
+ printk(KERN_ERR "failed to get NUMA memory information from SRAT"
+ " table\n");
+ return 0;
+}
diff --git a/include/asm-x86/srat.h b/include/asm-x86/srat.h
index 456fe0b..774c919 100644
--- a/include/asm-x86/srat.h
+++ b/include/asm-x86/srat.h
@@ -27,7 +27,7 @@
#ifndef _ASM_SRAT_H_
#define _ASM_SRAT_H_
-#ifdef CONFIG_ACPI_SRAT
+#ifdef CONFIG_ACPI_NUMA
extern int get_memcfg_from_srat(void);
#else
static inline int get_memcfg_from_srat(void)
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