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[PATCH] genirq: x86_64 irq: Kill irq compression

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With more irqs in the system we don't need this.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Rajesh Shah <rajesh.shah@intel.com>
Cc: Andi Kleen <ak@muc.de>
Cc: "Protasevich, Natalie" <Natalie.Protasevich@UNISYS.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Eric W. Biederman 2006-10-04 02:16:53 -07:00 committed by Linus Torvalds
parent f023d764cc
commit cd1182f56a
3 changed files with 1 additions and 47 deletions
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5
arch/x86_64/kernel/io_apic.c
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@ -1415,8 +1415,6 @@ static inline void unlock_ExtINT_logic(void)
spin_unlock_irqrestore(&ioapic_lock, flags); spin_unlock_irqrestore(&ioapic_lock, flags);
} }
int timer_uses_ioapic_pin_0;
/* /*
* This code may look a bit paranoid, but it's supposed to cooperate with * This code may look a bit paranoid, but it's supposed to cooperate with
* a wide range of boards and BIOS bugs. Fortunately only the timer IRQ * a wide range of boards and BIOS bugs. Fortunately only the timer IRQ
@ -1453,9 +1451,6 @@ static inline void check_timer(void)
pin2 = ioapic_i8259.pin; pin2 = ioapic_i8259.pin;
apic2 = ioapic_i8259.apic; apic2 = ioapic_i8259.apic;
if (pin1 == 0)
timer_uses_ioapic_pin_0 = 1;
apic_printk(APIC_VERBOSE,KERN_INFO "..TIMER: vector=0x%02X apic1=%d pin1=%d apic2=%d pin2=%d\n", apic_printk(APIC_VERBOSE,KERN_INFO "..TIMER: vector=0x%02X apic1=%d pin1=%d apic2=%d pin2=%d\n",
vector, apic1, pin1, apic2, pin2); vector, apic1, pin1, apic2, pin2);

42
arch/x86_64/kernel/mpparse.c
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@ -790,20 +790,11 @@ void __init mp_config_acpi_legacy_irqs(void)
} }
} }
#define MAX_GSI_NUM 4096
int mp_register_gsi(u32 gsi, int triggering, int polarity) int mp_register_gsi(u32 gsi, int triggering, int polarity)
{ {
int ioapic = -1; int ioapic = -1;
int ioapic_pin = 0; int ioapic_pin = 0;
int idx, bit = 0; int idx, bit = 0;
static int pci_irq = 16;
/*
* Mapping between Global System Interrupts, which
* represent all possible interrupts, to the IRQs
* assigned to actual devices.
*/
static int gsi_to_irq[MAX_GSI_NUM];
if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC) if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
return gsi; return gsi;
@ -836,42 +827,11 @@ int mp_register_gsi(u32 gsi, int triggering, int polarity)
if ((1<<bit) & mp_ioapic_routing[ioapic].pin_programmed[idx]) { if ((1<<bit) & mp_ioapic_routing[ioapic].pin_programmed[idx]) {
Dprintk(KERN_DEBUG "Pin %d-%d already programmed\n", Dprintk(KERN_DEBUG "Pin %d-%d already programmed\n",
mp_ioapic_routing[ioapic].apic_id, ioapic_pin); mp_ioapic_routing[ioapic].apic_id, ioapic_pin);
return gsi_to_irq[gsi]; return gsi;
} }
mp_ioapic_routing[ioapic].pin_programmed[idx] |= (1<<bit); mp_ioapic_routing[ioapic].pin_programmed[idx] |= (1<<bit);
if (triggering == ACPI_LEVEL_SENSITIVE) {
/*
* For PCI devices assign IRQs in order, avoiding gaps
* due to unused I/O APIC pins.
*/
int irq = gsi;
if (gsi < MAX_GSI_NUM) {
/*
* Retain the VIA chipset work-around (gsi > 15), but
* avoid a problem where the 8254 timer (IRQ0) is setup
* via an override (so it's not on pin 0 of the ioapic),
* and at the same time, the pin 0 interrupt is a PCI
* type. The gsi > 15 test could cause these two pins
* to be shared as IRQ0, and they are not shareable.
* So test for this condition, and if necessary, avoid
* the pin collision.
*/
if (gsi > 15 || (gsi == 0 && !timer_uses_ioapic_pin_0))
gsi = pci_irq++;
/*
* Don't assign IRQ used by ACPI SCI
*/
if (gsi == acpi_fadt.sci_int)
gsi = pci_irq++;
gsi_to_irq[irq] = gsi;
} else {
printk(KERN_ERR "GSI %u is too high\n", gsi);
return gsi;
}
}
io_apic_set_pci_routing(ioapic, ioapic_pin, gsi, io_apic_set_pci_routing(ioapic, ioapic_pin, gsi,
triggering == ACPI_EDGE_SENSITIVE ? 0 : 1, triggering == ACPI_EDGE_SENSITIVE ? 0 : 1,
polarity == ACPI_ACTIVE_HIGH ? 0 : 1); polarity == ACPI_ACTIVE_HIGH ? 0 : 1);

1
include/asm-x86_64/io_apic.h
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@ -162,7 +162,6 @@ extern int skip_ioapic_setup;
extern int io_apic_get_version (int ioapic); extern int io_apic_get_version (int ioapic);
extern int io_apic_get_redir_entries (int ioapic); extern int io_apic_get_redir_entries (int ioapic);
extern int io_apic_set_pci_routing (int ioapic, int pin, int irq, int, int); extern int io_apic_set_pci_routing (int ioapic, int pin, int irq, int, int);
extern int timer_uses_ioapic_pin_0;
#endif #endif
extern int sis_apic_bug; /* dummy */ extern int sis_apic_bug; /* dummy */