From 6b78cb549b4105cbf7c6f7461f27a21f00c44997 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Wed, 16 Feb 2011 17:11:10 +0100 Subject: 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 Cc: Yinghai Lu Cc: Brian Gerst Cc: Cyrill Gorcunov Cc: Shaohui Zheng Cc: David Rientjes Cc: Ingo Molnar Cc: H. Peter Anvin --- arch/x86/mm/numa_64.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) (limited to 'arch/x86/mm/numa_64.c') 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) -- cgit v1.2.3