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genirq/irqdomain: Update irq_domain_ops.activate() signature

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The irq_domain_ops.activate() callback has no return value and no way to
tell the function that the activation is early.

The upcoming changes to support a reservation scheme which allows to assign
interrupt vectors on x86 only when the interrupt is actually requested
requires:

  - A return value, so activation can fail at request_irq() time
  
  - Information that the activate invocation is early, i.e. before
    request_irq().

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Juergen Gross <jgross@suse.com>
Tested-by: Yu Chen <yu.c.chen@intel.com>
Acked-by: Juergen Gross <jgross@suse.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Alok Kataria <akataria@vmware.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Rui Zhang <rui.zhang@intel.com>
Cc: "K. Y. Srinivasan" <kys@microsoft.com>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Len Brown <lenb@kernel.org>
Link: https://lkml.kernel.org/r/20170913213152.848490816@linutronix.de
This commit is contained in:
Thomas Gleixner 2017-09-13 23:29:10 +02:00
parent c942cee46b
commit 7249164346
12 changed files with 36 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/x86/include/asm/irqdomain.h
View File

@ -41,8 +41,8 @@ extern int mp_irqdomain_alloc(struct irq_domain *domain, unsigned int virq,
unsigned int nr_irqs, void *arg);
extern void mp_irqdomain_free(struct irq_domain *domain, unsigned int virq,
unsigned int nr_irqs);
extern void mp_irqdomain_activate(struct irq_domain *domain,
struct irq_data *irq_data);
extern int mp_irqdomain_activate(struct irq_domain *domain,
struct irq_data *irq_data, bool early);
extern void mp_irqdomain_deactivate(struct irq_domain *domain,
struct irq_data *irq_data);
extern int mp_irqdomain_ioapic_idx(struct irq_domain *domain);

5
arch/x86/kernel/apic/htirq.c
View File

@ -112,8 +112,8 @@ static void htirq_domain_free(struct irq_domain *domain, unsigned int virq,
irq_domain_free_irqs_top(domain, virq, nr_irqs);
}
static void htirq_domain_activate(struct irq_domain *domain,
struct irq_data *irq_data)
static int htirq_domain_activate(struct irq_domain *domain,
struct irq_data *irq_data, bool early)
{
struct ht_irq_msg msg;
struct irq_cfg *cfg = irqd_cfg(irq_data);
@ -132,6 +132,7 @@ static void htirq_domain_activate(struct irq_domain *domain,
HT_IRQ_LOW_MT_ARBITRATED) |
HT_IRQ_LOW_IRQ_MASKED;
write_ht_irq_msg(irq_data->irq, &msg);
return 0;
}
static void htirq_domain_deactivate(struct irq_domain *domain,

5
arch/x86/kernel/apic/io_apic.c
View File

@ -2977,8 +2977,8 @@ void mp_irqdomain_free(struct irq_domain *domain, unsigned int virq,
irq_domain_free_irqs_top(domain, virq, nr_irqs);
}
void mp_irqdomain_activate(struct irq_domain *domain,
struct irq_data *irq_data)
int mp_irqdomain_activate(struct irq_domain *domain,
struct irq_data *irq_data, bool early)
{
unsigned long flags;
struct irq_pin_list *entry;
@ -2988,6 +2988,7 @@ void mp_irqdomain_activate(struct irq_domain *domain,
for_each_irq_pin(entry, data->irq_2_pin)
__ioapic_write_entry(entry->apic, entry->pin, data->entry);
raw_spin_unlock_irqrestore(&ioapic_lock, flags);
return 0;
}
void mp_irqdomain_deactivate(struct irq_domain *domain,

5
arch/x86/platform/uv/uv_irq.c
View File

@ -127,10 +127,11 @@ static void uv_domain_free(struct irq_domain *domain, unsigned int virq,
* Re-target the irq to the specified CPU and enable the specified MMR located
* on the specified blade to allow the sending of MSIs to the specified CPU.
*/
static void uv_domain_activate(struct irq_domain *domain,
struct irq_data *irq_data)
static int uv_domain_activate(struct irq_domain *domain,
struct irq_data *irq_data, bool early)
{
uv_program_mmr(irqd_cfg(irq_data), irq_data->chip_data);
return 0;
}
/*

8
drivers/gpio/gpio-xgene-sb.c
View File

@ -140,8 +140,9 @@ static int xgene_gpio_sb_to_irq(struct gpio_chip *gc, u32 gpio)
return irq_create_fwspec_mapping(&fwspec);
}
static void xgene_gpio_sb_domain_activate(struct irq_domain *d,
struct irq_data *irq_data)
static int xgene_gpio_sb_domain_activate(struct irq_domain *d,
struct irq_data *irq_data,
bool early)
{
struct xgene_gpio_sb *priv = d->host_data;
u32 gpio = HWIRQ_TO_GPIO(priv, irq_data->hwirq);
@ -150,11 +151,12 @@ static void xgene_gpio_sb_domain_activate(struct irq_domain *d,
dev_err(priv->gc.parent,
"Unable to configure XGene GPIO standby pin %d as IRQ\n",
gpio);
return;
return -ENOSPC;
}
xgene_gpio_set_bit(&priv->gc, priv->regs + MPA_GPIO_SEL_LO,
gpio * 2, 1);
return 0;
}
static void xgene_gpio_sb_domain_deactivate(struct irq_domain *d,

5
drivers/iommu/amd_iommu.c
View File

@ -4170,8 +4170,8 @@ static void irq_remapping_free(struct irq_domain *domain, unsigned int virq,
irq_domain_free_irqs_common(domain, virq, nr_irqs);
}
static void irq_remapping_activate(struct irq_domain *domain,
struct irq_data *irq_data)
static int irq_remapping_activate(struct irq_domain *domain,
struct irq_data *irq_data, bool early)
{
struct amd_ir_data *data = irq_data->chip_data;
struct irq_2_irte *irte_info = &data->irq_2_irte;
@ -4180,6 +4180,7 @@ static void irq_remapping_activate(struct irq_domain *domain,
if (iommu)
iommu->irte_ops->activate(data->entry, irte_info->devid,
irte_info->index);
return 0;
}
static void irq_remapping_deactivate(struct irq_domain *domain,

5
drivers/iommu/intel_irq_remapping.c
View File

@ -1389,12 +1389,13 @@ static void intel_irq_remapping_free(struct irq_domain *domain,
irq_domain_free_irqs_common(domain, virq, nr_irqs);
}
static void intel_irq_remapping_activate(struct irq_domain *domain,
struct irq_data *irq_data)
static int intel_irq_remapping_activate(struct irq_domain *domain,
struct irq_data *irq_data, bool early)
{
struct intel_ir_data *data = irq_data->chip_data;
modify_irte(&data->irq_2_iommu, &data->irte_entry);
return 0;
}
static void intel_irq_remapping_deactivate(struct irq_domain *domain,

10
drivers/irqchip/irq-gic-v3-its.c
View File

@ -2186,8 +2186,8 @@ static int its_irq_domain_alloc(struct irq_domain *domain, unsigned int virq,
return 0;
}
static void its_irq_domain_activate(struct irq_domain *domain,
struct irq_data *d)
static int its_irq_domain_activate(struct irq_domain *domain,
struct irq_data *d, bool early)
{
struct its_device *its_dev = irq_data_get_irq_chip_data(d);
u32 event = its_get_event_id(d);
@ -2205,6 +2205,7 @@ static void its_irq_domain_activate(struct irq_domain *domain,
/* Map the GIC IRQ and event to the device */
its_send_mapti(its_dev, d->hwirq, event);
return 0;
}
static void its_irq_domain_deactivate(struct irq_domain *domain,
@ -2678,8 +2679,8 @@ static int its_vpe_irq_domain_alloc(struct irq_domain *domain, unsigned int virq
return err;
}
static void its_vpe_irq_domain_activate(struct irq_domain *domain,
struct irq_data *d)
static int its_vpe_irq_domain_activate(struct irq_domain *domain,
struct irq_data *d, bool early)
{
struct its_vpe *vpe = irq_data_get_irq_chip_data(d);
@ -2687,6 +2688,7 @@ static void its_vpe_irq_domain_activate(struct irq_domain *domain,
vpe->col_idx = cpumask_first(cpu_online_mask);
its_send_vmapp(vpe, true);
its_send_vinvall(vpe);
return 0;
}
static void its_vpe_irq_domain_deactivate(struct irq_domain *domain,

5
drivers/pinctrl/stm32/pinctrl-stm32.c
View File

@ -289,13 +289,14 @@ static int stm32_gpio_domain_translate(struct irq_domain *d,
return 0;
}
static void stm32_gpio_domain_activate(struct irq_domain *d,
struct irq_data *irq_data)
static int stm32_gpio_domain_activate(struct irq_domain *d,
struct irq_data *irq_data, bool early)
{
struct stm32_gpio_bank *bank = d->host_data;
struct stm32_pinctrl *pctl = dev_get_drvdata(bank->gpio_chip.parent);
regmap_field_write(pctl->irqmux[irq_data->hwirq], bank->bank_nr);
return 0;
}
static int stm32_gpio_domain_alloc(struct irq_domain *d,

2
include/linux/irqdomain.h
View File

@ -111,7 +111,7 @@ struct irq_domain_ops {
unsigned int nr_irqs, void *arg);
void (*free)(struct irq_domain *d, unsigned int virq,
unsigned int nr_irqs);
void (*activate)(struct irq_domain *d, struct irq_data *irq_data);
int (*activate)(struct irq_domain *d, struct irq_data *irqd, bool early);
void (*deactivate)(struct irq_domain *d, struct irq_data *irq_data);
int (*translate)(struct irq_domain *d, struct irq_fwspec *fwspec,
unsigned long *out_hwirq, unsigned int *out_type);

2
kernel/irq/irqdomain.c
View File

@ -1690,7 +1690,7 @@ static void __irq_domain_activate_irq(struct irq_data *irq_data)
if (irq_data->parent_data)
__irq_domain_activate_irq(irq_data->parent_data);
if (domain->ops->activate)
domain->ops->activate(domain, irq_data);
domain->ops->activate(domain, irq_data, false);
}
}

5
kernel/irq/msi.c
View File

@ -102,13 +102,14 @@ int msi_domain_set_affinity(struct irq_data *irq_data,
return ret;
}
static void msi_domain_activate(struct irq_domain *domain,
struct irq_data *irq_data)
static int msi_domain_activate(struct irq_domain *domain,
struct irq_data *irq_data, bool early)
{
struct msi_msg msg;
BUG_ON(irq_chip_compose_msi_msg(irq_data, &msg));
irq_chip_write_msi_msg(irq_data, &msg);
return 0;
}
static void msi_domain_deactivate(struct irq_domain *domain,