Commit-ID: 30ba6dedce8de6816f9c7b7b5992566c9e357574 Gitweb: http://git.kernel.org/tip/30ba6dedce8de6816f9c7b7b5992566c9e357574 Author: Jiang Liu <jiang....@linux.intel.com> AuthorDate: Tue, 25 Nov 2014 15:49:30 +0800 Committer: Thomas Gleixner <t...@linutronix.de> CommitDate: Wed, 26 Nov 2014 23:52:46 +0100
x86, irq: Refine the way to allocate irq_cfg for legacy IRQs To support legacy ISA IRQs, we need to preallocate irq_cfg structures for legacy ISA IRQs. Refine the way to allocate irq_cfg for legacy ISA IRQs, so it's more friend to hierarchy irqdomain implementation. Signed-off-by: Jiang Liu <jiang....@linux.intel.com> Cc: Konrad Rzeszutek Wilk <konrad.w...@oracle.com> Cc: Tony Luck <tony.l...@intel.com> Cc: Joerg Roedel <j...@8bytes.org> Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org> Cc: Bjorn Helgaas <bhelg...@google.com> Cc: Benjamin Herrenschmidt <b...@kernel.crashing.org> Cc: Rafael J. Wysocki <r...@rjwysocki.net> Cc: Randy Dunlap <rdun...@infradead.org> Cc: Yinghai Lu <ying...@kernel.org> Cc: Borislav Petkov <b...@alien8.de> Cc: Grant Likely <grant.lik...@linaro.org> Link: http://lkml.kernel.org/r/1416901802-24211-7-git-send-email-jiang....@linux.intel.com Signed-off-by: Thomas Gleixner <t...@linutronix.de> Tested-by: Joerg Roedel <jroe...@suse.de> --- arch/x86/kernel/apic/io_apic.c | 13 +------------ arch/x86/kernel/apic/vector.c | 42 +++++++++++++++++++++++++++++++++++++++++- 2 files changed, 42 insertions(+), 13 deletions(-) diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index e465171..74a0e95 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -254,8 +254,7 @@ static void free_ioapic_saved_registers(int idx) int __init arch_early_ioapic_init(void) { - struct irq_cfg *cfg; - int i, node = cpu_to_node(0); + int i; if (!nr_legacy_irqs()) io_apic_irqs = ~0UL; @@ -263,16 +262,6 @@ int __init arch_early_ioapic_init(void) for_each_ioapic(i) alloc_ioapic_saved_registers(i); - /* - * For legacy IRQ's, start with assigning irq0 to irq15 to - * IRQ0_VECTOR to IRQ15_VECTOR for all cpu's. - */ - for (i = 0; i < nr_legacy_irqs(); i++) { - cfg = alloc_irq_and_cfg_at(i, node); - cfg->vector = IRQ0_VECTOR + i; - cpumask_setall(cfg->domain); - } - return 0; } diff --git a/arch/x86/kernel/apic/vector.c b/arch/x86/kernel/apic/vector.c index 609db19..4b8fad9 100644 --- a/arch/x86/kernel/apic/vector.c +++ b/arch/x86/kernel/apic/vector.c @@ -24,6 +24,9 @@ struct irq_domain *x86_vector_domain; static DEFINE_RAW_SPINLOCK(vector_lock); static struct irq_chip lapic_controller; +#ifdef CONFIG_X86_IO_APIC +static struct irq_cfg *legacy_irq_cfgs[NR_IRQS_LEGACY]; +#endif void lock_vector_lock(void) { @@ -283,6 +286,10 @@ static void x86_vector_free_irqs(struct irq_domain *domain, free_remapped_irq(virq); clear_irq_vector(virq + i, irq_data->chip_data); free_irq_cfg(irq_data->chip_data); +#ifdef CONFIG_X86_IO_APIC + if (virq + i < nr_legacy_irqs()) + legacy_irq_cfgs[virq + i] = NULL; +#endif irq_domain_reset_irq_data(irq_data); } } @@ -308,7 +315,12 @@ static int x86_vector_alloc_irqs(struct irq_domain *domain, unsigned int virq, for (i = 0; i < nr_irqs; i++) { irq_data = irq_domain_get_irq_data(domain, virq + i); BUG_ON(!irq_data); - cfg = alloc_irq_cfg(irq_data->node); +#ifdef CONFIG_X86_IO_APIC + if (virq + i < nr_legacy_irqs() && legacy_irq_cfgs[virq + i]) + cfg = legacy_irq_cfgs[virq + i]; + else +#endif + cfg = alloc_irq_cfg(irq_data->node); if (!cfg) { err = -ENOMEM; goto error; @@ -357,8 +369,36 @@ int __init arch_probe_nr_irqs(void) return nr_legacy_irqs(); } +#ifdef CONFIG_X86_IO_APIC +static void init_legacy_irqs(void) +{ + int i, node = cpu_to_node(0); + struct irq_cfg *cfg; + + /* + * For legacy IRQ's, start with assigning irq0 to irq15 to + * IRQ0_VECTOR to IRQ15_VECTOR for all cpu's. + */ + for (i = 0; i < nr_legacy_irqs(); i++) { + cfg = legacy_irq_cfgs[i] = alloc_irq_cfg(node); + BUG_ON(!cfg); + /* + * For legacy IRQ's, start with assigning irq0 to irq15 to + * IRQ0_VECTOR to IRQ15_VECTOR for all cpu's. + */ + cfg->vector = IRQ0_VECTOR + i; + cpumask_setall(cfg->domain); + irq_set_chip_data(i, cfg); + } +} +#else +static void init_legacy_irqs(void) { } +#endif + int __init arch_early_irq_init(void) { + init_legacy_irqs(); + x86_vector_domain = irq_domain_add_tree(NULL, &x86_vector_domain_ops, NULL); BUG_ON(x86_vector_domain == NULL); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
