1 #include <linux/kernel.h>
2 #include <linux/string.h>
3 #include <linux/cpumask.h>
4 #include <linux/errno.h>
7 #include <asm/hw_irq.h>
8 #include <asm/irq_remapping.h>
10 #include "irq_remapping.h"
12 int irq_remapping_enabled
;
14 int disable_irq_remap
;
15 int disable_sourceid_checking
;
18 static struct irq_remap_ops
*remap_ops
;
20 static __init
int setup_nointremap(char *str
)
22 disable_irq_remap
= 1;
25 early_param("nointremap", setup_nointremap
);
27 static __init
int setup_irqremap(char *str
)
33 if (!strncmp(str
, "on", 2))
34 disable_irq_remap
= 0;
35 else if (!strncmp(str
, "off", 3))
36 disable_irq_remap
= 1;
37 else if (!strncmp(str
, "nosid", 5))
38 disable_sourceid_checking
= 1;
39 else if (!strncmp(str
, "no_x2apic_optout", 16))
42 str
+= strcspn(str
, ",");
49 early_param("intremap", setup_irqremap
);
51 void __init
setup_irq_remapping_ops(void)
53 remap_ops
= &intel_irq_remap_ops
;
56 int irq_remapping_supported(void)
58 if (disable_irq_remap
)
61 if (!remap_ops
|| !remap_ops
->supported
)
64 return remap_ops
->supported();
67 int __init
irq_remapping_prepare(void)
69 if (!remap_ops
|| !remap_ops
->prepare
)
72 return remap_ops
->prepare();
75 int __init
irq_remapping_enable(void)
77 if (!remap_ops
|| !remap_ops
->enable
)
80 return remap_ops
->enable();
83 void irq_remapping_disable(void)
85 if (!remap_ops
|| !remap_ops
->disable
)
91 int irq_remapping_reenable(int mode
)
93 if (!remap_ops
|| !remap_ops
->reenable
)
96 return remap_ops
->reenable(mode
);
99 int __init
irq_remap_enable_fault_handling(void)
101 if (!remap_ops
|| !remap_ops
->enable_faulting
)
104 return remap_ops
->enable_faulting();
107 int setup_ioapic_remapped_entry(int irq
,
108 struct IO_APIC_route_entry
*entry
,
109 unsigned int destination
, int vector
,
110 struct io_apic_irq_attr
*attr
)
112 if (!remap_ops
|| !remap_ops
->setup_ioapic_entry
)
115 return remap_ops
->setup_ioapic_entry(irq
, entry
, destination
,
119 int set_remapped_irq_affinity(struct irq_data
*data
, const struct cpumask
*mask
,
122 if (!config_enabled(CONFIG_SMP
) || !remap_ops
||
123 !remap_ops
->set_affinity
)
126 return remap_ops
->set_affinity(data
, mask
, force
);
129 void free_remapped_irq(int irq
)
131 if (!remap_ops
|| !remap_ops
->free_irq
)
134 remap_ops
->free_irq(irq
);
137 void compose_remapped_msi_msg(struct pci_dev
*pdev
,
138 unsigned int irq
, unsigned int dest
,
139 struct msi_msg
*msg
, u8 hpet_id
)
141 if (!remap_ops
|| !remap_ops
->compose_msi_msg
)
144 remap_ops
->compose_msi_msg(pdev
, irq
, dest
, msg
, hpet_id
);
147 int msi_alloc_remapped_irq(struct pci_dev
*pdev
, int irq
, int nvec
)
149 if (!remap_ops
|| !remap_ops
->msi_alloc_irq
)
152 return remap_ops
->msi_alloc_irq(pdev
, irq
, nvec
);
155 int msi_setup_remapped_irq(struct pci_dev
*pdev
, unsigned int irq
,
156 int index
, int sub_handle
)
158 if (!remap_ops
|| !remap_ops
->msi_setup_irq
)
161 return remap_ops
->msi_setup_irq(pdev
, irq
, index
, sub_handle
);
164 int setup_hpet_msi_remapped(unsigned int irq
, unsigned int id
)
166 if (!remap_ops
|| !remap_ops
->setup_hpet_msi
)
169 return remap_ops
->setup_hpet_msi(irq
, id
);