Differential D18322 Diff 52562 head/sys/x86/x86/mp_x86.c

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head/sys/x86/x86/mp_x86.c

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/*		/*
* Assign logical CPU IDs to local APICs.		* Assign logical CPU IDs to local APICs.
*/		*/
void		void
assign_cpu_ids(void)		assign_cpu_ids(void)
{		{
struct topo_node *node;		struct topo_node *node;
u_int smt_mask;		u_int smt_mask;
		int nhyper;

smt_mask = (1u << core_id_shift) - 1;		smt_mask = (1u << core_id_shift) - 1;

/*		/*
* Assign CPU IDs to local APIC IDs and disable any CPUs		* Assign CPU IDs to local APIC IDs and disable any CPUs
* beyond MAXCPU. CPU 0 is always assigned to the BSP.		* beyond MAXCPU. CPU 0 is always assigned to the BSP.
*/		*/
mp_ncpus = 0;		mp_ncpus = 0;
		nhyper = 0;
TOPO_FOREACH(node, &topo_root) {		TOPO_FOREACH(node, &topo_root) {
if (node->type != TOPO_TYPE_PU)		if (node->type != TOPO_TYPE_PU)
continue;		continue;

if ((node->hwid & smt_mask) != (boot_cpu_id & smt_mask))		if ((node->hwid & smt_mask) != (boot_cpu_id & smt_mask))
cpu_info[node->hwid].cpu_hyperthread = 1;		cpu_info[node->hwid].cpu_hyperthread = 1;

if (resource_disabled("lapic", node->hwid)) {		if (resource_disabled("lapic", node->hwid)) {
Show All 11 Lines	TOPO_FOREACH(node, &topo_root) {
if (mp_ncpus >= MAXCPU)		if (mp_ncpus >= MAXCPU)
cpu_info[node->hwid].cpu_disabled = 1;		cpu_info[node->hwid].cpu_disabled = 1;

if (cpu_info[node->hwid].cpu_disabled) {		if (cpu_info[node->hwid].cpu_disabled) {
disabled_cpus++;		disabled_cpus++;
continue;		continue;
}		}

		if (cpu_info[node->hwid].cpu_hyperthread)
		nhyper++;

cpu_apic_ids[mp_ncpus] = node->hwid;		cpu_apic_ids[mp_ncpus] = node->hwid;
apic_cpuids[node->hwid] = mp_ncpus;		apic_cpuids[node->hwid] = mp_ncpus;
topo_set_pu_id(node, mp_ncpus);		topo_set_pu_id(node, mp_ncpus);
mp_ncpus++;		mp_ncpus++;
}		}

KASSERT(mp_maxid >= mp_ncpus - 1,		KASSERT(mp_maxid >= mp_ncpus - 1,
("%s: counters out of sync: max %d, count %d", __func__, mp_maxid,		("%s: counters out of sync: max %d, count %d", __func__, mp_maxid,
mp_ncpus));		mp_ncpus));

		mp_ncores = mp_ncpus - nhyper;
		smp_threads_per_core = mp_ncpus / mp_ncores;
}		}

/*		/*
* Print various information about the SMP system hardware and setup.		* Print various information about the SMP system hardware and setup.
*/		*/
void		void
cpu_mp_announce(void)		cpu_mp_announce(void)
{		{
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