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Commit a6c422cc authored by Glauber de Oliveira Costa's avatar Glauber de Oliveira Costa Committed by Ingo Molnar
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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: default avatarGlauber Costa <gcosta@redhat.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 73bf102b

arch/x86/kernel/mpparse_32.c

+17 −2
Original line number Diff line number Diff line
@@ -105,7 +105,8 @@ static struct mpc_config_translation *translation_table[MAX_MPC_ENTRY] __cpuinit 


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 @@ static void __cpuinit MP_processor_info (struct mpc_config_processor *m) 


	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 @@ static void __cpuinit MP_processor_info (struct mpc_config_processor *m) 
	}

	/* 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)

arch/x86/kernel/smpboot_32.c

+7 −17
Original line number Diff line number Diff line
@@ -525,16 +525,6 @@ wakeup_secondary_cpu(int phys_apicid, unsigned long start_eip) 
#endif	/* WAKE_SECONDARY_VIA_INIT */



extern cpumask_t cpu_initialized;

static inline int alloc_cpu_id(void)

{

	cpumask_t	tmp_map;

	int cpu;

	cpus_complement(tmp_map, cpu_present_map);

	cpu = first_cpu(tmp_map);

	if (cpu >= NR_CPUS)

		return -ENODEV;

	return cpu;

}



#ifdef CONFIG_HOTPLUG_CPU

static struct task_struct * __cpuinitdata cpu_idle_tasks[NR_CPUS];
@@ -605,7 +595,6 @@ static int __cpuinit do_boot_cpu(int apicid, int cpu) 


	irq_ctx_init(cpu);



	per_cpu(x86_cpu_to_apicid, cpu) = apicid;

	/*

	 * This grunge runs the startup process for

	 * the targeted processor.
@@ -666,10 +655,8 @@ static int __cpuinit do_boot_cpu(int apicid, int cpu) 
		cpu_clear(cpu, cpu_callout_map); /* was set here (do_boot_cpu()) */

		cpu_clear(cpu, cpu_initialized); /* was set by cpu_init() */

		cpu_clear(cpu, cpu_possible_map);

		per_cpu(x86_cpu_to_apicid, cpu) = BAD_APICID;

		cpucount--;

	} else {

		per_cpu(x86_cpu_to_apicid, cpu) = apicid;

		cpu_set(cpu, cpu_present_map);

	}



	/* mark "stuck" area as not stuck */
@@ -745,6 +732,7 @@ EXPORT_SYMBOL(xquad_portio); 
static void __init disable_smp(void)

{

	cpu_possible_map = cpumask_of_cpu(0);

	cpu_present_map = cpumask_of_cpu(0);

	smpboot_clear_io_apic_irqs();

	phys_cpu_present_map = physid_mask_of_physid(0);

	map_cpu_to_logical_apicid();
@@ -825,7 +813,6 @@ static void __init smp_boot_cpus(unsigned int max_cpus) 


	boot_cpu_physical_apicid = GET_APIC_ID(apic_read(APIC_ID));

	boot_cpu_logical_apicid = logical_smp_processor_id();

	per_cpu(x86_cpu_to_apicid, 0) = boot_cpu_physical_apicid;



	current_thread_info()->cpu = 0;
@@ -866,8 +853,11 @@ static void __init smp_boot_cpus(unsigned int max_cpus) 
			continue;

		if (max_cpus <= cpucount+1)

			continue;



		if (((cpu = alloc_cpu_id()) <= 0) || do_boot_cpu(apicid, cpu))

		/* Utterly temporary */

		for (cpu = 0; cpu < NR_CPUS; cpu++)

			if (per_cpu(x86_cpu_to_apicid, cpu) == apicid)

				break;

		if (do_boot_cpu(apicid, cpu))

			printk("CPU #%d not responding - cannot use it.\n",

								apicid);

		else