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x86-64, NUMA: Unify emulated apicid -> node mapping transformation 

NUMA emulation changes node mappings and thus apicid -> node mapping
needs to be updated accordingly.  srat_64 and amdtopology_64 did this
separately; however, all the necessary information is the mapping from
emulated nodes to physical nodes which is available in
emu_nid_to_phys[].

Implement common __apicid_to_node[] transformation in numa_emulation()
and drop duplicate implementations.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
Tejun Heo 2011-02-16 17:11:10 +01:00
parent 1cca534073
commit 6b78cb549b
3 changed files with 16 additions and 33 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
arch/x86/mm/amdtopology_64.c
View File

@ -196,10 +196,6 @@ int __init amd_numa_init(void)
}
#ifdef CONFIG_NUMA_EMU
static s16 fake_apicid_to_node[MAX_LOCAL_APIC] __initdata = {
[0 ... MAX_LOCAL_APIC-1] = NUMA_NO_NODE
};
/*
* For NUMA emulation, fake proximity domain (_PXM) to node id mappings must be
* setup to represent the physical topology but reflect the emulated
@ -224,20 +220,15 @@ void __init amd_fake_nodes(const struct bootnode *nodes, int nr_nodes)
for (i = 0; i < nr_nodes; i++) {
int index;
int nid;
int j;
nid = find_node_by_addr(nodes[i].start);
if (nid == NUMA_NO_NODE)
continue;
index = nodeids[nid] << bits;
if (fake_apicid_to_node[index + apicid_base] == NUMA_NO_NODE)
for (j = apicid_base; j < cores + apicid_base; j++)
fake_apicid_to_node[index + j] = i;
#ifdef CONFIG_ACPI_NUMA
__acpi_map_pxm_to_node(nid, i);
#endif
}
memcpy(__apicid_to_node, fake_apicid_to_node, sizeof(__apicid_to_node));
}
#endif /* CONFIG_NUMA_EMU */

16
arch/x86/mm/numa_64.c
View File

@ -858,7 +858,7 @@ static bool __init numa_emulation(int acpi, int amd)
static struct numa_meminfo ei __initdata;
static struct numa_meminfo pi __initdata;
const u64 max_addr = max_pfn << PAGE_SHIFT;
int i, ret;
int i, j, ret;
memset(&ei, 0, sizeof(ei));
pi = numa_meminfo;
@ -894,6 +894,20 @@ static bool __init numa_emulation(int acpi, int amd)
/* commit */
numa_meminfo = ei;
/*
* Transform __apicid_to_node table to use emulated nids by
* reverse-mapping phys_nid. The maps should always exist but fall
* back to zero just in case.
*/
for (i = 0; i < ARRAY_SIZE(__apicid_to_node); i++) {
if (__apicid_to_node[i] == NUMA_NO_NODE)
continue;
for (j = 0; j < ARRAY_SIZE(emu_nid_to_phys); j++)
if (__apicid_to_node[i] == emu_nid_to_phys[j])
break;
__apicid_to_node[i] = j < ARRAY_SIZE(emu_nid_to_phys) ? j : 0;
}
/* make sure all emulated nodes are mapped to a physical node */
for (i = 0; i < ARRAY_SIZE(emu_nid_to_phys); i++)
if (emu_nid_to_phys[i] == NUMA_NO_NODE)

24
arch/x86/mm/srat_64.c
View File

@ -265,9 +265,6 @@ int __init x86_acpi_numa_init(void)
static int fake_node_to_pxm_map[MAX_NUMNODES] __initdata = {
[0 ... MAX_NUMNODES-1] = PXM_INVAL
};
static s16 fake_apicid_to_node[MAX_LOCAL_APIC] __initdata = {
[0 ... MAX_LOCAL_APIC-1] = NUMA_NO_NODE
};
/*
* In NUMA emulation, we need to setup proximity domain (_PXM) to node ID
@ -279,7 +276,7 @@ static s16 fake_apicid_to_node[MAX_LOCAL_APIC] __initdata = {
*/
void __init acpi_fake_nodes(const struct bootnode *fake_nodes, int num_nodes)
{
int i, j;
int i;
for (i = 0; i < num_nodes; i++) {
int nid, pxm;
@ -291,29 +288,10 @@ void __init acpi_fake_nodes(const struct bootnode *fake_nodes, int num_nodes)
if (pxm == PXM_INVAL)
continue;
fake_node_to_pxm_map[i] = pxm;
/*
* For each apicid_to_node mapping that exists for this real
* node, it must now point to the fake node ID.
*/
for (j = 0; j < MAX_LOCAL_APIC; j++)
if (__apicid_to_node[j] == nid &&
fake_apicid_to_node[j] == NUMA_NO_NODE)
fake_apicid_to_node[j] = i;
}
/*
* If there are apicid-to-node mappings for physical nodes that do not
* have a corresponding emulated node, it should default to a guaranteed
* value.
*/
for (i = 0; i < MAX_LOCAL_APIC; i++)
if (__apicid_to_node[i] != NUMA_NO_NODE &&
fake_apicid_to_node[i] == NUMA_NO_NODE)
fake_apicid_to_node[i] = 0;
for (i = 0; i < num_nodes; i++)
__acpi_map_pxm_to_node(fake_node_to_pxm_map[i], i);
memcpy(__apicid_to_node, fake_apicid_to_node, sizeof(__apicid_to_node));
for (i = 0; i < num_nodes; i++)
if (fake_nodes[i].start != fake_nodes[i].end)