Since we are using struct numa_meminfo to store SRAT info, and sanitize
movablemem_map.map[], we need hotplug info in struct numa_meminfo.

This patch introduces a "bool hotpluggable" member into struct
numa_meminfo.

And modifies the following APIs' prototypes to support it:
   - numa_add_memblk()
   - numa_add_memblk_to()

And the following callers:
   - numaq_register_node()
   - dummy_numa_init()
   - amd_numa_init()
   - acpi_numa_memory_affinity_init() in x86

Signed-off-by: Tang Chen <tangc...@cn.fujitsu.com>
---
 arch/x86/include/asm/numa.h     |    3 ++-
 arch/x86/kernel/apic/numaq_32.c |    2 +-
 arch/x86/mm/amdtopology.c       |    3 ++-
 arch/x86/mm/numa.c              |   10 +++++++---
 arch/x86/mm/numa_internal.h     |    1 +
 arch/x86/mm/srat.c              |    2 +-
 6 files changed, 14 insertions(+), 7 deletions(-)

diff --git a/arch/x86/include/asm/numa.h b/arch/x86/include/asm/numa.h
index 1b99ee5..73096b2 100644
--- a/arch/x86/include/asm/numa.h
+++ b/arch/x86/include/asm/numa.h
@@ -31,7 +31,8 @@ extern int numa_off;
 extern s16 __apicid_to_node[MAX_LOCAL_APIC];
 extern nodemask_t numa_nodes_parsed __initdata;
 
-extern int __init numa_add_memblk(int nodeid, u64 start, u64 end);
+extern int __init numa_add_memblk(int nodeid, u64 start, u64 end,
+                                 bool hotpluggable);
 extern void __init numa_set_distance(int from, int to, int distance);
 
 static inline void set_apicid_to_node(int apicid, s16 node)
diff --git a/arch/x86/kernel/apic/numaq_32.c b/arch/x86/kernel/apic/numaq_32.c
index d661ee9..7a9c542 100644
--- a/arch/x86/kernel/apic/numaq_32.c
+++ b/arch/x86/kernel/apic/numaq_32.c
@@ -82,7 +82,7 @@ static inline void numaq_register_node(int node, struct 
sys_cfg_data *scd)
        int ret;
 
        node_set(node, numa_nodes_parsed);
-       ret = numa_add_memblk(node, start, end);
+       ret = numa_add_memblk(node, start, end, false);
        BUG_ON(ret < 0);
 }
 
diff --git a/arch/x86/mm/amdtopology.c b/arch/x86/mm/amdtopology.c
index 5247d01..d521471 100644
--- a/arch/x86/mm/amdtopology.c
+++ b/arch/x86/mm/amdtopology.c
@@ -167,7 +167,8 @@ int __init amd_numa_init(void)
                        nodeid, base, limit);
 
                prevbase = base;
-               numa_add_memblk(nodeid, base, limit);
+               /* Do not support memory hotplug for AMD cpu. */
+               numa_add_memblk(nodeid, base, limit, false);
                node_set(nodeid, numa_nodes_parsed);
        }
 
diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
index 4f754e6..ecf37fd 100644
--- a/arch/x86/mm/numa.c
+++ b/arch/x86/mm/numa.c
@@ -134,6 +134,7 @@ void __init setup_node_to_cpumask_map(void)
 }
 
 static int __init numa_add_memblk_to(int nid, u64 start, u64 end,
+                                    bool hotpluggable,
                                     struct numa_meminfo *mi)
 {
        /* ignore zero length blks */
@@ -155,6 +156,7 @@ static int __init numa_add_memblk_to(int nid, u64 start, 
u64 end,
        mi->blk[mi->nr_blks].start = start;
        mi->blk[mi->nr_blks].end = end;
        mi->blk[mi->nr_blks].nid = nid;
+       mi->blk[mi->nr_blks].hotpluggable = hotpluggable;
        mi->nr_blks++;
        return 0;
 }
@@ -179,15 +181,17 @@ void __init numa_remove_memblk_from(int idx, struct 
numa_meminfo *mi)
  * @nid: NUMA node ID of the new memblk
  * @start: Start address of the new memblk
  * @end: End address of the new memblk
+ * @hotpluggable: True if memblk is hotpluggable
  *
  * Add a new memblk to the default numa_meminfo.
  *
  * RETURNS:
  * 0 on success, -errno on failure.
  */
-int __init numa_add_memblk(int nid, u64 start, u64 end)
+int __init numa_add_memblk(int nid, u64 start, u64 end,
+                          bool hotpluggable)
 {
-       return numa_add_memblk_to(nid, start, end, &numa_meminfo);
+       return numa_add_memblk_to(nid, start, end, hotpluggable, &numa_meminfo);
 }
 
 /* Initialize NODE_DATA for a node on the local memory */
@@ -631,7 +635,7 @@ static int __init dummy_numa_init(void)
               0LLU, PFN_PHYS(max_pfn) - 1);
 
        node_set(0, numa_nodes_parsed);
-       numa_add_memblk(0, 0, PFN_PHYS(max_pfn));
+       numa_add_memblk(0, 0, PFN_PHYS(max_pfn), false);
 
        return 0;
 }
diff --git a/arch/x86/mm/numa_internal.h b/arch/x86/mm/numa_internal.h
index bb2fbcc..1ce4e6b 100644
--- a/arch/x86/mm/numa_internal.h
+++ b/arch/x86/mm/numa_internal.h
@@ -8,6 +8,7 @@ struct numa_memblk {
        u64                     start;
        u64                     end;
        int                     nid;
+       bool                    hotpluggable;
 };
 
 struct numa_meminfo {
diff --git a/arch/x86/mm/srat.c b/arch/x86/mm/srat.c
index 5055fa7..f7f6fd4 100644
--- a/arch/x86/mm/srat.c
+++ b/arch/x86/mm/srat.c
@@ -171,7 +171,7 @@ acpi_numa_memory_affinity_init(struct 
acpi_srat_mem_affinity *ma)
                goto out_err_bad_srat;
        }
 
-       if (numa_add_memblk(node, start, end) < 0)
+       if (numa_add_memblk(node, start, end, hotpluggable) < 0)
                goto out_err_bad_srat;
 
        node_set(node, numa_nodes_parsed);
-- 
1.7.1

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