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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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x86: ioapic: Cleanup sparse irq code
Switch over to the new allocator and remove all the magic which was caused by the unability to destroy irq descriptors. Get rid of the create_irq_nr() loop for sparse and non sparse irq. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Thomas Gleixner
parent
fe6dab4e79
commit
fbc6bff04a
@ -61,7 +61,6 @@ config X86
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select HAVE_USER_RETURN_NOTIFIER
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select HAVE_GENERIC_HARDIRQS
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select HAVE_SPARSE_IRQ
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select NUMA_IRQ_DESC if (SPARSE_IRQ && NUMA)
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select GENERIC_IRQ_PROBE
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select GENERIC_PENDING_IRQ if SMP
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@ -157,6 +157,9 @@ int __init arch_early_irq_init(void)
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count = ARRAY_SIZE(irq_cfgx);
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node = cpu_to_node(0);
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/* Make sure the legacy interrupts are marked in the bitmap */
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irq_reserve_irqs(0, legacy_pic->nr_legacy_irqs);
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for (i = 0; i < count; i++) {
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set_irq_chip_data(i, &cfg[i]);
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zalloc_cpumask_var_node(&cfg[i].domain, GFP_NOWAIT, node);
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@ -201,11 +204,15 @@ static struct irq_cfg *alloc_irq_cfg(unsigned int irq, int node)
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static void free_irq_cfg(unsigned int at, struct irq_cfg *cfg)
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{
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if (!cfg)
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return;
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set_irq_chip_data(at, NULL);
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free_cpumask_var(cfg->domain);
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free_cpumask_var(cfg->old_domain);
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kfree(cfg);
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}
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#if 0
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int arch_init_chip_data(struct irq_desc *desc, int node)
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{
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struct irq_cfg *cfg;
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@ -323,6 +330,7 @@ void arch_free_chip_data(struct irq_desc *old_desc, struct irq_desc *desc)
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}
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}
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/* end for move_irq_desc */
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#endif
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#else
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@ -1479,11 +1487,9 @@ static struct {
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static void __init setup_IO_APIC_irqs(void)
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{
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int apic_id, pin, idx, irq;
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int notcon = 0;
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struct irq_desc *desc;
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struct irq_cfg *cfg;
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int apic_id, pin, idx, irq, notcon = 0;
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int node = cpu_to_node(0);
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struct irq_cfg *cfg;
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apic_printk(APIC_VERBOSE, KERN_DEBUG "init IO_APIC IRQs\n");
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@ -1520,12 +1526,10 @@ static void __init setup_IO_APIC_irqs(void)
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apic->multi_timer_check(apic_id, irq))
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continue;
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desc = irq_to_desc_alloc_node(irq, node);
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if (!desc) {
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printk(KERN_INFO "can not get irq_desc for %d\n", irq);
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cfg = alloc_irq_and_cfg_at(irq, node);
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if (!cfg)
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continue;
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}
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cfg = get_irq_desc_chip_data(desc);
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add_pin_to_irq_node(cfg, node, apic_id, pin);
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/*
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* don't mark it in pin_programmed, so later acpi could
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@ -1547,9 +1551,7 @@ static void __init setup_IO_APIC_irqs(void)
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*/
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void setup_IO_APIC_irq_extra(u32 gsi)
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{
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int apic_id = 0, pin, idx, irq;
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int node = cpu_to_node(0);
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struct irq_desc *desc;
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int apic_id = 0, pin, idx, irq, node = cpu_to_node(0);
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struct irq_cfg *cfg;
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/*
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@ -1570,13 +1572,10 @@ void setup_IO_APIC_irq_extra(u32 gsi)
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if (apic_id == 0 || irq < NR_IRQS_LEGACY)
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return;
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desc = irq_to_desc_alloc_node(irq, node);
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if (!desc) {
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printk(KERN_INFO "can not get irq_desc for %d\n", irq);
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cfg = alloc_irq_and_cfg_at(irq, node);
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if (!cfg)
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return;
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}
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cfg = get_irq_desc_chip_data(desc);
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add_pin_to_irq_node(cfg, node, apic_id, pin);
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if (test_bit(pin, mp_ioapic_routing[apic_id].pin_programmed)) {
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@ -3177,44 +3176,37 @@ device_initcall(ioapic_init_sysfs);
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/*
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* Dynamic irq allocate and deallocation
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*/
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unsigned int create_irq_nr(unsigned int irq_want, int node)
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unsigned int create_irq_nr(unsigned int from, int node)
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{
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/* Allocate an unused irq */
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unsigned int irq;
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unsigned int new;
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struct irq_cfg *cfg;
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unsigned long flags;
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struct irq_cfg *cfg_new = NULL;
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struct irq_desc *desc_new = NULL;
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unsigned int ret = 0;
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int irq;
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irq = 0;
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if (irq_want < nr_irqs_gsi)
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irq_want = nr_irqs_gsi;
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if (from < nr_irqs_gsi)
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from = nr_irqs_gsi;
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irq = alloc_irq_from(from, node);
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if (irq < 0)
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return 0;
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cfg = alloc_irq_cfg(irq, node);
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if (!cfg) {
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free_irq_at(irq, NULL);
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return 0;
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}
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raw_spin_lock_irqsave(&vector_lock, flags);
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for (new = irq_want; new < nr_irqs; new++) {
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desc_new = irq_to_desc_alloc_node(new, node);
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if (!desc_new) {
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printk(KERN_INFO "can not get irq_desc for %d\n", new);
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continue;
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}
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cfg_new = get_irq_desc_chip_data(desc_new);
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if (cfg_new->vector != 0)
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continue;
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desc_new = move_irq_desc(desc_new, node);
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cfg_new = get_irq_desc_chip_data(desc_new);
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if (__assign_irq_vector(new, cfg_new, apic->target_cpus()) == 0)
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irq = new;
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break;
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}
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if (!__assign_irq_vector(irq, cfg, apic->target_cpus()))
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ret = irq;
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raw_spin_unlock_irqrestore(&vector_lock, flags);
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if (irq > 0)
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dynamic_irq_init_keep_chip_data(irq);
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return irq;
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if (ret) {
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set_irq_chip_data(irq, cfg);
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irq_clear_status_flags(irq, IRQ_NOREQUEST);
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} else {
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free_irq_at(irq, cfg);
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}
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return ret;
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}
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int create_irq(void)
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@ -3234,14 +3226,16 @@ int create_irq(void)
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void destroy_irq(unsigned int irq)
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{
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struct irq_cfg *cfg = get_irq_chip_data(irq);
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unsigned long flags;
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dynamic_irq_cleanup_keep_chip_data(irq);
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irq_set_status_flags(irq, IRQ_NOREQUEST|IRQ_NOPROBE);
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free_irte(irq);
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raw_spin_lock_irqsave(&vector_lock, flags);
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__clear_irq_vector(irq, get_irq_chip_data(irq));
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__clear_irq_vector(irq, cfg);
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raw_spin_unlock_irqrestore(&vector_lock, flags);
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free_irq_at(irq, cfg);
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}
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/*
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@ -3802,7 +3796,6 @@ int __init arch_probe_nr_irqs(void)
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static int __io_apic_set_pci_routing(struct device *dev, int irq,
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struct io_apic_irq_attr *irq_attr)
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{
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struct irq_desc *desc;
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struct irq_cfg *cfg;
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int node;
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int ioapic, pin;
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@ -3820,18 +3813,14 @@ static int __io_apic_set_pci_routing(struct device *dev, int irq,
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else
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node = cpu_to_node(0);
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desc = irq_to_desc_alloc_node(irq, node);
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if (!desc) {
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printk(KERN_INFO "can not get irq_desc %d\n", irq);
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cfg = alloc_irq_and_cfg_at(irq, node);
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if (!cfg)
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return 0;
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}
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pin = irq_attr->ioapic_pin;
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trigger = irq_attr->trigger;
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polarity = irq_attr->polarity;
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cfg = get_irq_desc_chip_data(desc);
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/*
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* IRQs < 16 are already in the irq_2_pin[] map
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*/
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@ -4232,11 +4221,11 @@ void __init pre_init_apic_IRQ0(void)
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#ifndef CONFIG_SMP
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phys_cpu_present_map = physid_mask_of_physid(boot_cpu_physical_apicid);
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#endif
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irq_to_desc_alloc_node(0, 0);
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/* Make sure the irq descriptor is set up */
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cfg = alloc_irq_and_cfg_at(0, 0);
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setup_local_APIC();
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cfg = irq_cfg(0);
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add_pin_to_irq_node(cfg, 0, 0, 0);
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set_irq_chip_and_handler_name(0, &ioapic_chip, handle_edge_irq, "edge");
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