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-rw-r--r--arch/x86/kernel/setup.c13
-rw-r--r--arch/x86/mm/numa.c6
-rw-r--r--drivers/acpi/numa.c23
-rw-r--r--include/linux/acpi.h8
4 files changed, 34 insertions, 16 deletions
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 915f5efefcf5..9c857f05cef0 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -1056,6 +1056,15 @@ void __init setup_arch(char **cmdline_p)
setup_bios_corruption_check();
#endif
+ /*
+ * In the memory hotplug case, the kernel needs info from SRAT to
+ * determine which memory is hotpluggable before allocating memory
+ * using memblock.
+ */
+ acpi_boot_table_init();
+ early_acpi_boot_init();
+ early_parse_srat();
+
#ifdef CONFIG_X86_32
printk(KERN_DEBUG "initial memory mapped: [mem 0x00000000-%#010lx]\n",
(max_pfn_mapped<<PAGE_SHIFT) - 1);
@@ -1101,10 +1110,6 @@ void __init setup_arch(char **cmdline_p)
/*
* Parse the ACPI tables for possible boot-time SMP configuration.
*/
- acpi_boot_table_init();
-
- early_acpi_boot_init();
-
initmem_init();
memblock_find_dma_reserve();
diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
index e3963f52aaea..dfd30259eb89 100644
--- a/arch/x86/mm/numa.c
+++ b/arch/x86/mm/numa.c
@@ -560,10 +560,12 @@ static int __init numa_init(int (*init_func)(void))
for (i = 0; i < MAX_LOCAL_APIC; i++)
set_apicid_to_node(i, NUMA_NO_NODE);
- nodes_clear(numa_nodes_parsed);
+ /*
+ * Do not clear numa_nodes_parsed or zero numa_meminfo here, because
+ * SRAT was parsed earlier in early_parse_srat().
+ */
nodes_clear(node_possible_map);
nodes_clear(node_online_map);
- memset(&numa_meminfo, 0, sizeof(numa_meminfo));
WARN_ON(memblock_set_node(0, ULLONG_MAX, MAX_NUMNODES));
numa_reset_distance();
diff --git a/drivers/acpi/numa.c b/drivers/acpi/numa.c
index 33e609f63585..59844ee149be 100644
--- a/drivers/acpi/numa.c
+++ b/drivers/acpi/numa.c
@@ -282,10 +282,10 @@ acpi_table_parse_srat(enum acpi_srat_type id,
handler, max_entries);
}
-int __init acpi_numa_init(void)
-{
- int cnt = 0;
+static int srat_mem_cnt;
+void __init early_parse_srat(void)
+{
/*
* Should not limit number with cpu num that is from NR_CPUS or nr_cpus=
* SRAT cpu entries could have different order with that in MADT.
@@ -295,21 +295,24 @@ int __init acpi_numa_init(void)
/* SRAT: Static Resource Affinity Table */
if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) {
acpi_table_parse_srat(ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY,
- acpi_parse_x2apic_affinity, 0);
+ acpi_parse_x2apic_affinity, 0);
acpi_table_parse_srat(ACPI_SRAT_TYPE_CPU_AFFINITY,
- acpi_parse_processor_affinity, 0);
- cnt = acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY,
- acpi_parse_memory_affinity,
- NR_NODE_MEMBLKS);
+ acpi_parse_processor_affinity, 0);
+ srat_mem_cnt = acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY,
+ acpi_parse_memory_affinity,
+ NR_NODE_MEMBLKS);
}
+}
+int __init acpi_numa_init(void)
+{
/* SLIT: System Locality Information Table */
acpi_table_parse(ACPI_SIG_SLIT, acpi_parse_slit);
acpi_numa_arch_fixup();
- if (cnt < 0)
- return cnt;
+ if (srat_mem_cnt < 0)
+ return srat_mem_cnt;
else if (!parsed_numa_memblks)
return -ENOENT;
return 0;
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index bcbdd7484e58..f46cfd73a553 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -485,6 +485,14 @@ static inline bool acpi_driver_match_device(struct device *dev,
#endif /* !CONFIG_ACPI */
+#ifdef CONFIG_ACPI_NUMA
+void __init early_parse_srat(void);
+#else
+static inline void early_parse_srat(void)
+{
+}
+#endif
+
#ifdef CONFIG_ACPI
void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state,
u32 pm1a_ctrl, u32 pm1b_ctrl));