[Xen-devel] nr_irqs_gsi

[Joe Jin <joe.jin@xxxxxxxxxx>]

Hi,

IHAC whose server have 12 NICs, but when bring up found the 12 NIC not be
enabled, I found below from xm-dmesg
(XEN) physdev.c:122: dom0: map invalid irq 55

The corresponding codes:

115     /* Verify or get irq. */
116     switch ( map->type )
117     {
118     case MAP_PIRQ_TYPE_GSI:
119         if ( map->index < 0 || map->index >= nr_irqs_gsi )
120         {
121             dprintk(XENLOG_G_ERR, "dom%d: map invalid irq %d\n",
122                     d->domain_id, map->index);
123             ret = -EINVAL;
124             goto free_domain;
125         }
126 

Log all info to xm-dmesg I got:
(XEN) ACPI: IOAPIC (id[0x00] address[0xfec00000] gsi_base[0])
(XEN) IOAPIC[0]: apic_id 0, version 32, address 0xfec00000, GSI 0-23
(XEN) ACPI: IOAPIC (id[0x01] address[0xfec80000] gsi_base[32])
(XEN) IOAPIC[1]: apic_id 1, version 32, address 0xfec80000, GSI 32-55
(XEN) ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
(XEN) ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
(XEN) ACPI: IRQ0 used by override.
(XEN) ACPI: IRQ2 used by override.
(XEN) ACPI: IRQ9 used by override.
(XEN) Enabling APIC mode:  Phys.  Using 2 I/O APICs
(XEN) ACPI: HPET id: 0x8086a301 base: 0xfed00000
(XEN) PCI: MCFG configuration 0: base e0000000 segment 0 buses 0 - 255
(XEN) PCI: MCFG area at e0000000 reserved in E820
(XEN) ERST table is invalid
(XEN) Using ACPI (MADT) for SMP configuration information
(XEN) IRQ limits: 55 GSI, 3033 MSI/MSI-X
(XEN) Using scheduler: SMP Credit Scheduler (credit)

nr_irqs_gsi = 55, 
So the condition of #119 should be (map->index > nr_irqs_gsi)?
for GSI irq 55 should be available as well?

Thanks,
Joe

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