ia64: initialize cpu maps early
Tejun Heo [Fri, 2 Oct 2009 04:28:56 +0000 (13:28 +0900)]
All information necessary to initialize cpu possible and present maps
are available once early_acpi_boot_init() is complete.  Reorganize
setup_arch() and acpi init functions such that,

* CPU information is printed after LAPIC entries are parsed in
  early_acpi_boot_init().

* smp_build_cpu_map() is called by setup_arch() instead of acpi
  functions.

* smp_build_cpu_map() is called once all CPU related information is
  available before memory is initialized.

This is primarily to allow find_memory() to use cpu maps but is also a
general cleanup.  Please note that with this change, the somewhat
ad-hoc early_cpu_possible_map defined and used for NUMA configurations
is probably unnecessary.  Something to clean up another day.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: linux-ia64 <linux-ia64@vger.kernel.org>

arch/ia64/kernel/acpi.c
arch/ia64/kernel/setup.c

index baec6f0..40574ae 100644 (file)
@@ -702,11 +702,23 @@ int __init early_acpi_boot_init(void)
                printk(KERN_ERR PREFIX
                       "Error parsing MADT - no LAPIC entries\n");
 
+#ifdef CONFIG_SMP
+       if (available_cpus == 0) {
+               printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
+               printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
+               smp_boot_data.cpu_phys_id[available_cpus] =
+                   hard_smp_processor_id();
+               available_cpus = 1;     /* We've got at least one of these, no? */
+       }
+       smp_boot_data.cpu_count = available_cpus;
+#endif
+       /* Make boot-up look pretty */
+       printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus,
+              total_cpus);
+
        return 0;
 }
 
-
-
 int __init acpi_boot_init(void)
 {
 
@@ -769,18 +781,8 @@ int __init acpi_boot_init(void)
        if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt))
                printk(KERN_ERR PREFIX "Can't find FADT\n");
 
+#ifdef CONFIG_ACPI_NUMA
 #ifdef CONFIG_SMP
-       if (available_cpus == 0) {
-               printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
-               printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
-               smp_boot_data.cpu_phys_id[available_cpus] =
-                   hard_smp_processor_id();
-               available_cpus = 1;     /* We've got at least one of these, no? */
-       }
-       smp_boot_data.cpu_count = available_cpus;
-
-       smp_build_cpu_map();
-# ifdef CONFIG_ACPI_NUMA
        if (srat_num_cpus == 0) {
                int cpu, i = 1;
                for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
@@ -789,14 +791,9 @@ int __init acpi_boot_init(void)
                                node_cpuid[i++].phys_id =
                                    smp_boot_data.cpu_phys_id[cpu];
        }
-# endif
 #endif
-#ifdef CONFIG_ACPI_NUMA
        build_cpu_to_node_map();
 #endif
-       /* Make boot-up look pretty */
-       printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus,
-              total_cpus);
        return 0;
 }
 
index 1de86c9..5d77c1e 100644 (file)
@@ -566,19 +566,18 @@ setup_arch (char **cmdline_p)
        early_acpi_boot_init();
 # ifdef CONFIG_ACPI_NUMA
        acpi_numa_init();
-#ifdef CONFIG_ACPI_HOTPLUG_CPU
+#  ifdef CONFIG_ACPI_HOTPLUG_CPU
        prefill_possible_map();
-#endif
+#  endif
        per_cpu_scan_finalize((cpus_weight(early_cpu_possible_map) == 0 ?
                32 : cpus_weight(early_cpu_possible_map)),
                additional_cpus > 0 ? additional_cpus : 0);
 # endif
-#else
-# ifdef CONFIG_SMP
-       smp_build_cpu_map();    /* happens, e.g., with the Ski simulator */
-# endif
 #endif /* CONFIG_APCI_BOOT */
 
+#ifdef CONFIG_SMP
+       smp_build_cpu_map();
+#endif
        find_memory();
 
        /* process SAL system table: */