From a7062211865efb53cda253d6e33a106f0fe20ebe Mon Sep 17 00:00:00 2001 From: Yinghai Lu Date: Thu, 6 Mar 2008 01:11:11 -0800 Subject: [PATCH] x86: fix amd_detect_cmp for system with apicid lifting, boot cpu apicid will be 4 got: CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line) CPU: L2 Cache: 512K (64 bytes/line) CPU 0/4 -> Node 0 CPU: Physical Processor ID: 1 CPU: Processor Core ID: 0 so try to offset apicid back before get phys_proc_id with bits shift. then we can get correct socket ID also remove remove cpu_data(0) reference. because cpu_data(0) only be ready after smp_prepare_cpus with the assignment from boot_cpu_data to current_cpu_data aka cpu_data(0). and check_bugs()==>identify_cpu(&boot_cpu_data) is quite before than smp_prepare_cpus. So just use boot_cpu_id instead. Signed-off-by: Yinghai Lu Signed-off-by: Ingo Molnar --- arch/x86/kernel/setup_64.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/kernel/setup_64.c b/arch/x86/kernel/setup_64.c index d65b73e..f303c70 100644 --- a/arch/x86/kernel/setup_64.c +++ b/arch/x86/kernel/setup_64.c @@ -564,7 +564,7 @@ static void __cpuinit amd_detect_cmp(struct cpuinfo_x86 *c) /* Low order bits define the core id (index of core in socket) */ c->cpu_core_id = c->phys_proc_id & ((1 << bits)-1); /* Convert the APIC ID into the socket ID */ - c->phys_proc_id = phys_pkg_id(bits); + c->phys_proc_id = (c->apicid - boot_cpu_id) >> bits; #ifdef CONFIG_NUMA node = c->phys_proc_id; @@ -581,7 +581,7 @@ static void __cpuinit amd_detect_cmp(struct cpuinfo_x86 *c) If that doesn't result in a usable node fall back to the path for the previous case. */ - int ht_nodeid = apicid - (cpu_data(0).phys_proc_id << bits); + int ht_nodeid = apicid - boot_cpu_id; if (ht_nodeid >= 0 && apicid_to_node[ht_nodeid] != NUMA_NO_NODE) -- 2.7.4