x86: fill cpu to apicid and present map in mpparse
This is the way x86_64 does, and complement the already
present patch that does the bios cpu to apicid mapping here
Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/kernel/mpparse_32.c b/arch/x86/kernel/mpparse_32.c
index 6ea9716..a0cec74 100644
--- a/arch/x86/kernel/mpparse_32.c
+++ b/arch/x86/kernel/mpparse_32.c
@@ -105,7 +105,8 @@
static void __cpuinit MP_processor_info (struct mpc_config_processor *m)
{
- int ver, apicid;
+ int ver, apicid, cpu;
+ cpumask_t tmp_map;
physid_mask_t phys_cpu;
if (!(m->mpc_cpuflag & CPU_ENABLED)) {
@@ -198,6 +199,16 @@
cpu_set(num_processors, cpu_possible_map);
num_processors++;
+ cpus_complement(tmp_map, cpu_present_map);
+ cpu = first_cpu(tmp_map);
+
+ if (m->mpc_cpuflag & CPU_BOOTPROCESSOR)
+ /*
+ * x86_bios_cpu_apicid is required to have processors listed
+ * in same order as logical cpu numbers. Hence the first
+ * entry is BSP, and so on.
+ */
+ cpu = 0;
/*
* Would be preferable to switch to bigsmp when CONFIG_HOTPLUG_CPU=y
@@ -220,12 +231,16 @@
}
/* are we being called early in kernel startup? */
if (x86_cpu_to_apicid_early_ptr) {
+ u16 *cpu_to_apicid = x86_cpu_to_apicid_early_ptr;
u16 *bios_cpu_apicid = x86_bios_cpu_apicid_early_ptr;
+
+ cpu_to_apicid[cpu] = m->mpc_apicid;
bios_cpu_apicid[num_processors - 1] = m->mpc_apicid;
} else {
- int cpu = num_processors - 1;
+ per_cpu(x86_cpu_to_apicid, cpu) = m->mpc_apicid;
per_cpu(x86_bios_cpu_apicid, cpu) = m->mpc_apicid;
}
+ cpu_set(cpu, cpu_present_map);
}
static void __init MP_bus_info (struct mpc_config_bus *m)