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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH 2/2] x86: move generic IRQ code out of io_apic.c
On 19/10/11 07:35, Jan Beulich wrote:
> x86: move generic IRQ code out of io_apic.c
>
> While doing so, eliminate the use of struct irq_cfg and convert the
> CPU mask accessors to the new style ones as far as possible.
>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
Acked-by: Andrew Cooper <andrew.coooper3@xxxxxxxxxx>
> --- a/xen/arch/x86/io_apic.c
> +++ b/xen/arch/x86/io_apic.c
> @@ -528,133 +528,6 @@ static void clear_IO_APIC (void)
> }
>
> #ifdef CONFIG_SMP
> -fastcall void smp_irq_move_cleanup_interrupt(struct cpu_user_regs *regs)
> -{
> - unsigned vector, me;
> - struct cpu_user_regs *old_regs = set_irq_regs(regs);
> -
> - ack_APIC_irq();
> - this_cpu(irq_count)++;
> - irq_enter();
> -
> - me = smp_processor_id();
> - for (vector = FIRST_DYNAMIC_VECTOR; vector < NR_VECTORS; vector++) {
> - unsigned int irq;
> - unsigned int irr;
> - struct irq_desc *desc;
> - struct irq_cfg *cfg;
> - irq = __get_cpu_var(vector_irq)[vector];
> -
> - if (irq == -1)
> - continue;
> -
> - desc = irq_to_desc(irq);
> - if (!desc)
> - continue;
> -
> - cfg = &desc->arch;
> - spin_lock(&desc->lock);
> - if (!cfg->move_cleanup_count)
> - goto unlock;
> -
> - if (vector == cfg->vector && cpu_isset(me, cfg->cpu_mask))
> - goto unlock;
> -
> - irr = apic_read(APIC_IRR + (vector / 32 * 0x10));
> - /*
> - * Check if the vector that needs to be cleanedup is
> - * registered at the cpu's IRR. If so, then this is not
> - * the best time to clean it up. Lets clean it up in the
> - * next attempt by sending another IRQ_MOVE_CLEANUP_VECTOR
> - * to myself.
> - */
> - if (irr & (1 << (vector % 32))) {
> - genapic->send_IPI_self(IRQ_MOVE_CLEANUP_VECTOR);
> - TRACE_3D(TRC_HW_IRQ_MOVE_CLEANUP_DELAY,
> - irq, vector, smp_processor_id());
> - goto unlock;
> - }
> -
> - TRACE_3D(TRC_HW_IRQ_MOVE_CLEANUP,
> - irq, vector, smp_processor_id());
> -
> - __get_cpu_var(vector_irq)[vector] = -1;
> - cfg->move_cleanup_count--;
> -
> - if ( cfg->move_cleanup_count == 0 )
> - {
> - cfg->old_vector = IRQ_VECTOR_UNASSIGNED;
> - cpus_clear(cfg->old_cpu_mask);
> -
> - if ( cfg->used_vectors )
> - {
> - ASSERT(test_bit(vector, cfg->used_vectors));
> - clear_bit(vector, cfg->used_vectors);
> - }
> - }
> -unlock:
> - spin_unlock(&desc->lock);
> - }
> -
> - irq_exit();
> - set_irq_regs(old_regs);
> -}
> -
> -static void send_cleanup_vector(struct irq_cfg *cfg)
> -{
> - cpumask_t cleanup_mask;
> -
> - cpus_and(cleanup_mask, cfg->old_cpu_mask, cpu_online_map);
> - cfg->move_cleanup_count = cpus_weight(cleanup_mask);
> - genapic->send_IPI_mask(&cleanup_mask, IRQ_MOVE_CLEANUP_VECTOR);
> -
> - cfg->move_in_progress = 0;
> -}
> -
> -void irq_complete_move(struct irq_desc *desc)
> -{
> - struct irq_cfg *cfg = &desc->arch;
> - unsigned vector, me;
> -
> - if (likely(!cfg->move_in_progress))
> - return;
> -
> - vector = get_irq_regs()->entry_vector;
> - me = smp_processor_id();
> -
> - if (vector == cfg->vector && cpu_isset(me, cfg->cpu_mask))
> - send_cleanup_vector(cfg);
> -}
> -
> -unsigned int set_desc_affinity(struct irq_desc *desc, const cpumask_t *mask)
> -{
> - struct irq_cfg *cfg;
> - unsigned int irq;
> - int ret;
> - unsigned long flags;
> - cpumask_t dest_mask;
> -
> - if (!cpus_intersects(*mask, cpu_online_map))
> - return BAD_APICID;
> -
> - irq = desc->irq;
> - cfg = &desc->arch;
> -
> - local_irq_save(flags);
> - lock_vector_lock();
> - ret = __assign_irq_vector(irq, cfg, mask);
> - unlock_vector_lock();
> - local_irq_restore(flags);
> -
> - if (ret < 0)
> - return BAD_APICID;
> -
> - cpus_copy(desc->affinity, *mask);
> - cpus_and(dest_mask, *mask, cfg->cpu_mask);
> -
> - return cpu_mask_to_apicid(&dest_mask);
> -}
> -
> static void
> set_ioapic_affinity_irq(struct irq_desc *desc, const cpumask_t *mask)
> {
> --- a/xen/arch/x86/irq.c
> +++ b/xen/arch/x86/irq.c
> @@ -598,6 +598,128 @@ void move_native_irq(struct irq_desc *de
> desc->handler->enable(desc);
> }
>
> +fastcall void smp_irq_move_cleanup_interrupt(struct cpu_user_regs *regs)
> +{
> + unsigned vector, me;
> + struct cpu_user_regs *old_regs = set_irq_regs(regs);
> +
> + ack_APIC_irq();
> + this_cpu(irq_count)++;
> + irq_enter();
> +
> + me = smp_processor_id();
> + for (vector = FIRST_DYNAMIC_VECTOR; vector < NR_VECTORS; vector++) {
> + unsigned int irq;
> + unsigned int irr;
> + struct irq_desc *desc;
> + irq = __get_cpu_var(vector_irq)[vector];
> +
> + if (irq == -1)
> + continue;
> +
> + desc = irq_to_desc(irq);
> + if (!desc)
> + continue;
> +
> + spin_lock(&desc->lock);
> + if (!desc->arch.move_cleanup_count)
> + goto unlock;
> +
> + if (vector == desc->arch.vector && cpumask_test_cpu(me,
> &desc->arch.cpu_mask))
> + goto unlock;
> +
> + irr = apic_read(APIC_IRR + (vector / 32 * 0x10));
> + /*
> + * Check if the vector that needs to be cleanedup is
> + * registered at the cpu's IRR. If so, then this is not
> + * the best time to clean it up. Lets clean it up in the
> + * next attempt by sending another IRQ_MOVE_CLEANUP_VECTOR
> + * to myself.
> + */
> + if (irr & (1 << (vector % 32))) {
> + genapic->send_IPI_self(IRQ_MOVE_CLEANUP_VECTOR);
> + TRACE_3D(TRC_HW_IRQ_MOVE_CLEANUP_DELAY,
> + irq, vector, smp_processor_id());
> + goto unlock;
> + }
> +
> + TRACE_3D(TRC_HW_IRQ_MOVE_CLEANUP,
> + irq, vector, smp_processor_id());
> +
> + __get_cpu_var(vector_irq)[vector] = -1;
> + desc->arch.move_cleanup_count--;
> +
> + if ( desc->arch.move_cleanup_count == 0 )
> + {
> + desc->arch.old_vector = IRQ_VECTOR_UNASSIGNED;
> + cpumask_clear(&desc->arch.old_cpu_mask);
> +
> + if ( desc->arch.used_vectors )
> + {
> + ASSERT(test_bit(vector, desc->arch.used_vectors));
> + clear_bit(vector, desc->arch.used_vectors);
> + }
> + }
> +unlock:
> + spin_unlock(&desc->lock);
> + }
> +
> + irq_exit();
> + set_irq_regs(old_regs);
> +}
> +
> +static void send_cleanup_vector(struct irq_desc *desc)
> +{
> + cpumask_t cleanup_mask;
> +
> + cpumask_and(&cleanup_mask, &desc->arch.old_cpu_mask, &cpu_online_map);
> + desc->arch.move_cleanup_count = cpumask_weight(&cleanup_mask);
> + genapic->send_IPI_mask(&cleanup_mask, IRQ_MOVE_CLEANUP_VECTOR);
> +
> + desc->arch.move_in_progress = 0;
> +}
> +
> +void irq_complete_move(struct irq_desc *desc)
> +{
> + unsigned vector, me;
> +
> + if (likely(!desc->arch.move_in_progress))
> + return;
> +
> + vector = get_irq_regs()->entry_vector;
> + me = smp_processor_id();
> +
> + if (vector == desc->arch.vector && cpumask_test_cpu(me,
> &desc->arch.cpu_mask))
> + send_cleanup_vector(desc);
> +}
> +
> +unsigned int set_desc_affinity(struct irq_desc *desc, const cpumask_t *mask)
> +{
> + unsigned int irq;
> + int ret;
> + unsigned long flags;
> + cpumask_t dest_mask;
> +
> + if (!cpus_intersects(*mask, cpu_online_map))
> + return BAD_APICID;
> +
> + irq = desc->irq;
> +
> + local_irq_save(flags);
> + lock_vector_lock();
> + ret = __assign_irq_vector(irq, &desc->arch, mask);
> + unlock_vector_lock();
> + local_irq_restore(flags);
> +
> + if (ret < 0)
> + return BAD_APICID;
> +
> + cpumask_copy(&desc->affinity, mask);
> + cpumask_and(&dest_mask, mask, &desc->arch.cpu_mask);
> +
> + return cpu_mask_to_apicid(&dest_mask);
> +}
> +
> /* For re-setting irq interrupt affinity for specific irq */
> void irq_set_affinity(struct irq_desc *desc, const cpumask_t *mask)
> {
>
>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel
--
Andrew Cooper - Dom0 Kernel Engineer, Citrix XenServer
T: +44 (0)1223 225 900, http://www.citrix.com
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