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136d249ef7
Xen dom0 needs to paravirtualize IO operations to the IO APIC, so add a io_apic_ops for it to intercept. Do this as ops structure because there's at least some chance that another paravirtualized environment may want to intercept these. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Acked-by: Suresh Siddha <suresh.b.siddha@intel.com> Cc: jwboyer@redhat.com Cc: yinghai@kernel.org Link: http://lkml.kernel.org/r/1332385090-18056-2-git-send-email-konrad.wilk@oracle.com [ Made all the affected code easier on the eyes ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
218 lines
5.1 KiB
C
218 lines
5.1 KiB
C
#ifndef _ASM_X86_IO_APIC_H
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#define _ASM_X86_IO_APIC_H
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#include <linux/types.h>
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#include <asm/mpspec.h>
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#include <asm/apicdef.h>
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#include <asm/irq_vectors.h>
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/*
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* Intel IO-APIC support for SMP and UP systems.
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*
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* Copyright (C) 1997, 1998, 1999, 2000 Ingo Molnar
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*/
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/* I/O Unit Redirection Table */
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#define IO_APIC_REDIR_VECTOR_MASK 0x000FF
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#define IO_APIC_REDIR_DEST_LOGICAL 0x00800
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#define IO_APIC_REDIR_DEST_PHYSICAL 0x00000
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#define IO_APIC_REDIR_SEND_PENDING (1 << 12)
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#define IO_APIC_REDIR_REMOTE_IRR (1 << 14)
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#define IO_APIC_REDIR_LEVEL_TRIGGER (1 << 15)
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#define IO_APIC_REDIR_MASKED (1 << 16)
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struct io_apic_ops {
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void (*init) (void);
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unsigned int (*read) (unsigned int apic, unsigned int reg);
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void (*write) (unsigned int apic, unsigned int reg, unsigned int value);
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void (*modify)(unsigned int apic, unsigned int reg, unsigned int value);
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};
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void __init set_io_apic_ops(const struct io_apic_ops *);
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/*
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* The structure of the IO-APIC:
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*/
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union IO_APIC_reg_00 {
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u32 raw;
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struct {
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u32 __reserved_2 : 14,
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LTS : 1,
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delivery_type : 1,
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__reserved_1 : 8,
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ID : 8;
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} __attribute__ ((packed)) bits;
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};
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union IO_APIC_reg_01 {
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u32 raw;
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struct {
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u32 version : 8,
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__reserved_2 : 7,
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PRQ : 1,
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entries : 8,
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__reserved_1 : 8;
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} __attribute__ ((packed)) bits;
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};
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union IO_APIC_reg_02 {
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u32 raw;
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struct {
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u32 __reserved_2 : 24,
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arbitration : 4,
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__reserved_1 : 4;
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} __attribute__ ((packed)) bits;
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};
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union IO_APIC_reg_03 {
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u32 raw;
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struct {
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u32 boot_DT : 1,
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__reserved_1 : 31;
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} __attribute__ ((packed)) bits;
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};
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struct IO_APIC_route_entry {
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__u32 vector : 8,
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delivery_mode : 3, /* 000: FIXED
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* 001: lowest prio
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* 111: ExtINT
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*/
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dest_mode : 1, /* 0: physical, 1: logical */
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delivery_status : 1,
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polarity : 1,
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irr : 1,
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trigger : 1, /* 0: edge, 1: level */
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mask : 1, /* 0: enabled, 1: disabled */
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__reserved_2 : 15;
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__u32 __reserved_3 : 24,
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dest : 8;
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} __attribute__ ((packed));
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struct IR_IO_APIC_route_entry {
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__u64 vector : 8,
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zero : 3,
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index2 : 1,
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delivery_status : 1,
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polarity : 1,
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irr : 1,
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trigger : 1,
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mask : 1,
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reserved : 31,
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format : 1,
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index : 15;
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} __attribute__ ((packed));
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#define IOAPIC_AUTO -1
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#define IOAPIC_EDGE 0
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#define IOAPIC_LEVEL 1
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#ifdef CONFIG_X86_IO_APIC
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/*
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* # of IO-APICs and # of IRQ routing registers
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*/
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extern int nr_ioapics;
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extern int mpc_ioapic_id(int ioapic);
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extern unsigned int mpc_ioapic_addr(int ioapic);
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extern struct mp_ioapic_gsi *mp_ioapic_gsi_routing(int ioapic);
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#define MP_MAX_IOAPIC_PIN 127
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/* # of MP IRQ source entries */
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extern int mp_irq_entries;
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/* MP IRQ source entries */
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extern struct mpc_intsrc mp_irqs[MAX_IRQ_SOURCES];
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/* non-0 if default (table-less) MP configuration */
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extern int mpc_default_type;
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/* Older SiS APIC requires we rewrite the index register */
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extern int sis_apic_bug;
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/* 1 if "noapic" boot option passed */
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extern int skip_ioapic_setup;
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/* 1 if "noapic" boot option passed */
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extern int noioapicquirk;
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/* -1 if "noapic" boot option passed */
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extern int noioapicreroute;
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/* 1 if the timer IRQ uses the '8259A Virtual Wire' mode */
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extern int timer_through_8259;
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/*
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* If we use the IO-APIC for IRQ routing, disable automatic
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* assignment of PCI IRQ's.
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*/
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#define io_apic_assign_pci_irqs \
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(mp_irq_entries && !skip_ioapic_setup && io_apic_irqs)
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struct io_apic_irq_attr;
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extern 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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void setup_IO_APIC_irq_extra(u32 gsi);
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extern void ioapic_and_gsi_init(void);
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extern void ioapic_insert_resources(void);
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int io_apic_setup_irq_pin_once(unsigned int irq, int node, struct io_apic_irq_attr *attr);
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extern int save_ioapic_entries(void);
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extern void mask_ioapic_entries(void);
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extern int restore_ioapic_entries(void);
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extern int get_nr_irqs_gsi(void);
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extern void setup_ioapic_ids_from_mpc(void);
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extern void setup_ioapic_ids_from_mpc_nocheck(void);
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struct mp_ioapic_gsi{
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u32 gsi_base;
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u32 gsi_end;
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};
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extern struct mp_ioapic_gsi mp_gsi_routing[];
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extern u32 gsi_top;
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int mp_find_ioapic(u32 gsi);
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int mp_find_ioapic_pin(int ioapic, u32 gsi);
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void __init mp_register_ioapic(int id, u32 address, u32 gsi_base);
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extern void __init pre_init_apic_IRQ0(void);
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extern void mp_save_irq(struct mpc_intsrc *m);
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extern void disable_ioapic_support(void);
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#else /* !CONFIG_X86_IO_APIC */
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#define io_apic_assign_pci_irqs 0
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#define setup_ioapic_ids_from_mpc x86_init_noop
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static const int timer_through_8259 = 0;
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static inline void ioapic_and_gsi_init(void) { }
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static inline void ioapic_insert_resources(void) { }
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#define gsi_top (NR_IRQS_LEGACY)
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static inline int mp_find_ioapic(u32 gsi) { return 0; }
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struct io_apic_irq_attr;
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static inline int io_apic_set_pci_routing(struct device *dev, int irq,
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struct io_apic_irq_attr *irq_attr) { return 0; }
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static inline int save_ioapic_entries(void)
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{
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return -ENOMEM;
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}
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static inline void mask_ioapic_entries(void) { }
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static inline int restore_ioapic_entries(void)
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{
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return -ENOMEM;
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}
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static inline void mp_save_irq(struct mpc_intsrc *m) { };
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static inline void disable_ioapic_support(void) { }
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#endif
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#endif /* _ASM_X86_IO_APIC_H */
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