633260fa14
Device interrupts which go through do_IRQ() or the spurious interrupt handler have their separate entry code on 64 bit for no good reason. Both 32 and 64 bit transport the vector number through ORIG_[RE]AX in pt_regs. Further the vector number is forced to fit into an u8 and is complemented and offset by 0x80 so it's in the signed character range. Otherwise GAS would expand the pushq to a 5 byte instruction for any vector > 0x7F. Treat the vector number like an error code and hand it to the C function as argument. This allows to get rid of the extra entry code in a later step. Simplify the error code push magic by implementing the pushq imm8 via a '.byte 0x6a, vector' sequence so GAS is not able to screw it up. As the pushq imm8 is sign extending the resulting error code needs to be truncated to 8 bits in C code. Originally-by: Andy Lutomirski <luto@kernel.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@kernel.org> Acked-by: Andy Lutomirski <luto@kernel.org> Link: https://lore.kernel.org/r/20200521202118.796915981@linutronix.de
166 lines
3.9 KiB
C
166 lines
3.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_X86_HW_IRQ_H
|
|
#define _ASM_X86_HW_IRQ_H
|
|
|
|
/*
|
|
* (C) 1992, 1993 Linus Torvalds, (C) 1997 Ingo Molnar
|
|
*
|
|
* moved some of the old arch/i386/kernel/irq.h to here. VY
|
|
*
|
|
* IRQ/IPI changes taken from work by Thomas Radke
|
|
* <tomsoft@informatik.tu-chemnitz.de>
|
|
*
|
|
* hacked by Andi Kleen for x86-64.
|
|
* unified by tglx
|
|
*/
|
|
|
|
#include <asm/irq_vectors.h>
|
|
|
|
#define IRQ_MATRIX_BITS NR_VECTORS
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#include <linux/percpu.h>
|
|
#include <linux/profile.h>
|
|
#include <linux/smp.h>
|
|
|
|
#include <linux/atomic.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/sections.h>
|
|
|
|
/* Interrupt handlers registered during init_IRQ */
|
|
extern asmlinkage void apic_timer_interrupt(void);
|
|
extern asmlinkage void x86_platform_ipi(void);
|
|
extern asmlinkage void kvm_posted_intr_ipi(void);
|
|
extern asmlinkage void kvm_posted_intr_wakeup_ipi(void);
|
|
extern asmlinkage void kvm_posted_intr_nested_ipi(void);
|
|
extern asmlinkage void error_interrupt(void);
|
|
extern asmlinkage void irq_work_interrupt(void);
|
|
extern asmlinkage void uv_bau_message_intr1(void);
|
|
|
|
extern asmlinkage void spurious_interrupt(void);
|
|
extern asmlinkage void spurious_apic_interrupt(void);
|
|
extern asmlinkage void thermal_interrupt(void);
|
|
extern asmlinkage void reschedule_interrupt(void);
|
|
|
|
extern asmlinkage void irq_move_cleanup_interrupt(void);
|
|
extern asmlinkage void reboot_interrupt(void);
|
|
extern asmlinkage void threshold_interrupt(void);
|
|
extern asmlinkage void deferred_error_interrupt(void);
|
|
|
|
extern asmlinkage void call_function_interrupt(void);
|
|
extern asmlinkage void call_function_single_interrupt(void);
|
|
|
|
#ifdef CONFIG_X86_LOCAL_APIC
|
|
struct irq_data;
|
|
struct pci_dev;
|
|
struct msi_desc;
|
|
|
|
enum irq_alloc_type {
|
|
X86_IRQ_ALLOC_TYPE_IOAPIC = 1,
|
|
X86_IRQ_ALLOC_TYPE_HPET,
|
|
X86_IRQ_ALLOC_TYPE_MSI,
|
|
X86_IRQ_ALLOC_TYPE_MSIX,
|
|
X86_IRQ_ALLOC_TYPE_DMAR,
|
|
X86_IRQ_ALLOC_TYPE_UV,
|
|
};
|
|
|
|
struct irq_alloc_info {
|
|
enum irq_alloc_type type;
|
|
u32 flags;
|
|
const struct cpumask *mask; /* CPU mask for vector allocation */
|
|
union {
|
|
int unused;
|
|
#ifdef CONFIG_HPET_TIMER
|
|
struct {
|
|
int hpet_id;
|
|
int hpet_index;
|
|
void *hpet_data;
|
|
};
|
|
#endif
|
|
#ifdef CONFIG_PCI_MSI
|
|
struct {
|
|
struct pci_dev *msi_dev;
|
|
irq_hw_number_t msi_hwirq;
|
|
};
|
|
#endif
|
|
#ifdef CONFIG_X86_IO_APIC
|
|
struct {
|
|
int ioapic_id;
|
|
int ioapic_pin;
|
|
int ioapic_node;
|
|
u32 ioapic_trigger : 1;
|
|
u32 ioapic_polarity : 1;
|
|
u32 ioapic_valid : 1;
|
|
struct IO_APIC_route_entry *ioapic_entry;
|
|
};
|
|
#endif
|
|
#ifdef CONFIG_DMAR_TABLE
|
|
struct {
|
|
int dmar_id;
|
|
void *dmar_data;
|
|
};
|
|
#endif
|
|
#ifdef CONFIG_X86_UV
|
|
struct {
|
|
int uv_limit;
|
|
int uv_blade;
|
|
unsigned long uv_offset;
|
|
char *uv_name;
|
|
};
|
|
#endif
|
|
#if IS_ENABLED(CONFIG_VMD)
|
|
struct {
|
|
struct msi_desc *desc;
|
|
};
|
|
#endif
|
|
};
|
|
};
|
|
|
|
struct irq_cfg {
|
|
unsigned int dest_apicid;
|
|
unsigned int vector;
|
|
};
|
|
|
|
extern struct irq_cfg *irq_cfg(unsigned int irq);
|
|
extern struct irq_cfg *irqd_cfg(struct irq_data *irq_data);
|
|
extern void lock_vector_lock(void);
|
|
extern void unlock_vector_lock(void);
|
|
#ifdef CONFIG_SMP
|
|
extern void send_cleanup_vector(struct irq_cfg *);
|
|
extern void irq_complete_move(struct irq_cfg *cfg);
|
|
#else
|
|
static inline void send_cleanup_vector(struct irq_cfg *c) { }
|
|
static inline void irq_complete_move(struct irq_cfg *c) { }
|
|
#endif
|
|
|
|
extern void apic_ack_edge(struct irq_data *data);
|
|
#else /* CONFIG_X86_LOCAL_APIC */
|
|
static inline void lock_vector_lock(void) {}
|
|
static inline void unlock_vector_lock(void) {}
|
|
#endif /* CONFIG_X86_LOCAL_APIC */
|
|
|
|
/* Statistics */
|
|
extern atomic_t irq_err_count;
|
|
extern atomic_t irq_mis_count;
|
|
|
|
extern void elcr_set_level_irq(unsigned int irq);
|
|
|
|
extern char irq_entries_start[];
|
|
#ifdef CONFIG_TRACING
|
|
#define trace_irq_entries_start irq_entries_start
|
|
#endif
|
|
|
|
extern char spurious_entries_start[];
|
|
|
|
#define VECTOR_UNUSED NULL
|
|
#define VECTOR_SHUTDOWN ((void *)-1L)
|
|
#define VECTOR_RETRIGGERED ((void *)-2L)
|
|
|
|
typedef struct irq_desc* vector_irq_t[NR_VECTORS];
|
|
DECLARE_PER_CPU(vector_irq_t, vector_irq);
|
|
|
|
#endif /* !ASSEMBLY_ */
|
|
|
|
#endif /* _ASM_X86_HW_IRQ_H */
|