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| author | Tejun Heo <tj@kernel.org> | 2011-02-16 17:11:10 +0100 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2011-02-16 17:11:10 +0100 |
| commit | 6b78cb549b4105cbf7c6f7461f27a21f00c44997 (patch) | |
| tree | fc0e67399cb02445c7f3ca7fcb1f62c41583738c /arch/x86/mm/numa_64.c | |
| parent | 1cca53407336fb6a86092e36dbc5c1e4d45d912b (diff) | |
| download | linux-6b78cb549b4105cbf7c6f7461f27a21f00c44997.tar.bz2 | |
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>
Diffstat (limited to 'arch/x86/mm/numa_64.c')
| -rw-r--r-- | arch/x86/mm/numa_64.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/arch/x86/mm/numa_64.c b/arch/x86/mm/numa_64.c index bd086ebc0ffc..722039e0948f 100644 --- a/arch/x86/mm/numa_64.c +++ b/arch/x86/mm/numa_64.c @@ -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) |