forked from Minki/linux
a6cd6322d5
Fix the problem that the following error message is sometimes displayed
at irq migration when vector domain is enabled.
"Unexpected interrupt vector %d on CPU %d is not mapped to any IRQ!"
The cause of this problem is an interrupt is sent to the previous
target CPU after cleaning up vector to irq mapping table. To clean up
vector to irq map on the previous target CPU safty, change the irq
migration in multiple vector domain as follows. The original idea is
from x86 interrupt management code.
- Delay vector to irq table cleanup until the interrupts are sent
to new target CPUs. By this, it is ensured that target CPU is
completely changed on the interrupt controller side.
- Even after the interrupts are sent to new target CPUs, there can
be pended interrupts remaining on the previous target CPU. So we
need to delay clearning up vector to irq table until the pended
interrupt is handled. For this, send IPI to the previous target
CPU with lower priority vector and clean up vector to irq table
in its handler.
This patch affects only to irq migration code with multiple vector
domain is enabled.
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
178 lines
5.8 KiB
C
178 lines
5.8 KiB
C
#ifndef _ASM_IA64_HW_IRQ_H
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#define _ASM_IA64_HW_IRQ_H
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/*
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* Copyright (C) 2001-2003 Hewlett-Packard Co
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* David Mosberger-Tang <davidm@hpl.hp.com>
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*/
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#include <linux/interrupt.h>
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#include <linux/sched.h>
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#include <linux/types.h>
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#include <linux/profile.h>
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#include <asm/machvec.h>
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#include <asm/ptrace.h>
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#include <asm/smp.h>
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typedef u8 ia64_vector;
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/*
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* 0 special
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*
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* 1,3-14 are reserved from firmware
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*
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* 16-255 (vectored external interrupts) are available
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*
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* 15 spurious interrupt (see IVR)
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*
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* 16 lowest priority, 255 highest priority
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*
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* 15 classes of 16 interrupts each.
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*/
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#define IA64_MIN_VECTORED_IRQ 16
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#define IA64_MAX_VECTORED_IRQ 255
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#define IA64_NUM_VECTORS 256
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#define AUTO_ASSIGN -1
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#define IA64_SPURIOUS_INT_VECTOR 0x0f
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/*
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* Vectors 0x10-0x1f are used for low priority interrupts, e.g. CMCI.
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*/
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#define IA64_CPEP_VECTOR 0x1c /* corrected platform error polling vector */
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#define IA64_CMCP_VECTOR 0x1d /* corrected machine-check polling vector */
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#define IA64_CPE_VECTOR 0x1e /* corrected platform error interrupt vector */
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#define IA64_CMC_VECTOR 0x1f /* corrected machine-check interrupt vector */
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/*
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* Vectors 0x20-0x2f are reserved for legacy ISA IRQs.
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* Use vectors 0x30-0xe7 as the default device vector range for ia64.
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* Platforms may choose to reduce this range in platform_irq_setup, but the
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* platform range must fall within
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* [IA64_DEF_FIRST_DEVICE_VECTOR..IA64_DEF_LAST_DEVICE_VECTOR]
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*/
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extern int ia64_first_device_vector;
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extern int ia64_last_device_vector;
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#define IA64_DEF_FIRST_DEVICE_VECTOR 0x30
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#define IA64_DEF_LAST_DEVICE_VECTOR 0xe7
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#define IA64_FIRST_DEVICE_VECTOR ia64_first_device_vector
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#define IA64_LAST_DEVICE_VECTOR ia64_last_device_vector
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#define IA64_MAX_DEVICE_VECTORS (IA64_DEF_LAST_DEVICE_VECTOR - IA64_DEF_FIRST_DEVICE_VECTOR + 1)
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#define IA64_NUM_DEVICE_VECTORS (IA64_LAST_DEVICE_VECTOR - IA64_FIRST_DEVICE_VECTOR + 1)
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#define IA64_MCA_RENDEZ_VECTOR 0xe8 /* MCA rendez interrupt */
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#define IA64_PERFMON_VECTOR 0xee /* performance monitor interrupt vector */
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#define IA64_TIMER_VECTOR 0xef /* use highest-prio group 15 interrupt for timer */
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#define IA64_MCA_WAKEUP_VECTOR 0xf0 /* MCA wakeup (must be >MCA_RENDEZ_VECTOR) */
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#define IA64_IPI_LOCAL_TLB_FLUSH 0xfc /* SMP flush local TLB */
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#define IA64_IPI_RESCHEDULE 0xfd /* SMP reschedule */
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#define IA64_IPI_VECTOR 0xfe /* inter-processor interrupt vector */
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/* Used for encoding redirected irqs */
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#define IA64_IRQ_REDIRECTED (1 << 31)
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/* IA64 inter-cpu interrupt related definitions */
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#define IA64_IPI_DEFAULT_BASE_ADDR 0xfee00000
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/* Delivery modes for inter-cpu interrupts */
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enum {
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IA64_IPI_DM_INT = 0x0, /* pend an external interrupt */
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IA64_IPI_DM_PMI = 0x2, /* pend a PMI */
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IA64_IPI_DM_NMI = 0x4, /* pend an NMI (vector 2) */
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IA64_IPI_DM_INIT = 0x5, /* pend an INIT interrupt */
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IA64_IPI_DM_EXTINT = 0x7, /* pend an 8259-compatible interrupt. */
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};
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extern __u8 isa_irq_to_vector_map[16];
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#define isa_irq_to_vector(x) isa_irq_to_vector_map[(x)]
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struct irq_cfg {
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ia64_vector vector;
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cpumask_t domain;
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cpumask_t old_domain;
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unsigned move_cleanup_count;
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u8 move_in_progress : 1;
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};
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extern spinlock_t vector_lock;
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extern struct irq_cfg irq_cfg[NR_IRQS];
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#define irq_to_domain(x) irq_cfg[(x)].domain
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DECLARE_PER_CPU(int[IA64_NUM_VECTORS], vector_irq);
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extern struct hw_interrupt_type irq_type_ia64_lsapic; /* CPU-internal interrupt controller */
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extern int bind_irq_vector(int irq, int vector, cpumask_t domain);
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extern int assign_irq_vector (int irq); /* allocate a free vector */
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extern void free_irq_vector (int vector);
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extern int reserve_irq_vector (int vector);
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extern void __setup_vector_irq(int cpu);
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extern void ia64_send_ipi (int cpu, int vector, int delivery_mode, int redirect);
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extern void register_percpu_irq (ia64_vector vec, struct irqaction *action);
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extern int check_irq_used (int irq);
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extern void destroy_and_reserve_irq (unsigned int irq);
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#if defined(CONFIG_SMP) && (defined(CONFIG_IA64_GENERIC) || defined(CONFIG_IA64_DIG))
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extern int irq_prepare_move(int irq, int cpu);
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extern void irq_complete_move(unsigned int irq);
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#else
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static inline int irq_prepare_move(int irq, int cpu) { return 0; }
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static inline void irq_complete_move(unsigned int irq) {}
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#endif
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static inline void ia64_resend_irq(unsigned int vector)
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{
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platform_send_ipi(smp_processor_id(), vector, IA64_IPI_DM_INT, 0);
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}
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/*
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* Default implementations for the irq-descriptor API:
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*/
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extern irq_desc_t irq_desc[NR_IRQS];
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#ifndef CONFIG_IA64_GENERIC
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static inline ia64_vector __ia64_irq_to_vector(int irq)
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{
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return irq_cfg[irq].vector;
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}
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static inline unsigned int
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__ia64_local_vector_to_irq (ia64_vector vec)
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{
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return __get_cpu_var(vector_irq)[vec];
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}
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#endif
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/*
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* Next follows the irq descriptor interface. On IA-64, each CPU supports 256 interrupt
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* vectors. On smaller systems, there is a one-to-one correspondence between interrupt
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* vectors and the Linux irq numbers. However, larger systems may have multiple interrupt
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* domains meaning that the translation from vector number to irq number depends on the
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* interrupt domain that a CPU belongs to. This API abstracts such platform-dependent
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* differences and provides a uniform means to translate between vector and irq numbers
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* and to obtain the irq descriptor for a given irq number.
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*/
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/* Extract the IA-64 vector that corresponds to IRQ. */
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static inline ia64_vector
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irq_to_vector (int irq)
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{
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return platform_irq_to_vector(irq);
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}
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/*
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* Convert the local IA-64 vector to the corresponding irq number. This translation is
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* done in the context of the interrupt domain that the currently executing CPU belongs
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* to.
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*/
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static inline unsigned int
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local_vector_to_irq (ia64_vector vec)
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{
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return platform_local_vector_to_irq(vec);
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}
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#endif /* _ASM_IA64_HW_IRQ_H */
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