Len Brown wrote: > > >> Impact: find right nr_irqs_gsi on some systems. >> >> one system has gap between gsi. >> [ 0.000000] ACPI: IOAPIC (id[0x04] address[0xfec00000] gsi_base[0]) >> [ 0.000000] IOAPIC[0]: apic_id 4, version 0, address 0xfec00000, GSI 0-23 >> [ 0.000000] ACPI: IOAPIC (id[0x05] address[0xfeafd000] gsi_base[48]) >> [ 0.000000] IOAPIC[1]: apic_id 5, version 0, address 0xfeafd000, GSI 48-54 >> [ 0.000000] ACPI: IOAPIC (id[0x06] address[0xfeafc000] gsi_base[56]) >> [ 0.000000] IOAPIC[2]: apic_id 6, version 0, address 0xfeafc000, GSI 56-62 >> ... >> [ 0.000000] nr_irqs_gsi: 38 > > I've never seen gaps in GSIs. > I've never seen IOAPICs with 7 redirection table entries. > > This system looks quite broken even before the probe for nr_irqs_gsi. > Do you have more information on it? it is one AMD based system from Sun. it has two hypertransport chains. one: 8132 + ck804 one: io4 when 8 sockets are installed, will get [ 0.000000] ACPI: IOAPIC (id[0x00] address[0xfec00000] gsi_base[0]) [ 0.000000] IOAPIC[0]: apic_id 0, version 0, address 0xfec00000, GSI 0-23 [ 0.000000] ACPI: IOAPIC (id[0x01] address[0xfdefd000] gsi_base[48]) [ 0.000000] IOAPIC[1]: apic_id 1, version 0, address 0xfdefd000, GSI 48-54 [ 0.000000] ACPI: IOAPIC (id[0x02] address[0xfdefc000] gsi_base[56]) [ 0.000000] IOAPIC[2]: apic_id 2, version 0, address 0xfdefc000, GSI 56-62 [ 0.000000] ACPI: IOAPIC (id[0x03] address[0xfeaff000] gsi_base[24]) [ 0.000000] IOAPIC[3]: apic_id 3, version 0, address 0xfeaff000, GSI 24-47 when 2 sockets are installed, only HT chains is used. will get [ 0.000000] ACPI: IOAPIC (id[0x04] address[0xfec00000] gsi_base[0]) [ 0.000000] IOAPIC[0]: apic_id 4, version 0, address 0xfec00000, GSI 0-23 [ 0.000000] ACPI: IOAPIC (id[0x05] address[0xfeafd000] gsi_base[48]) [ 0.000000] IOAPIC[1]: apic_id 5, version 0, address 0xfeafd000, GSI 48-54 [ 0.000000] ACPI: IOAPIC (id[0x06] address[0xfeafc000] gsi_base[56]) [ 0.000000] IOAPIC[2]: apic_id 6, version 0, address 0xfeafc000, GSI 56-62 acpi madt ioapic-entries does include gsi_base field. amd 8131: has 4 gsi amd 8132: has 7 gsi, but only 3 can be used. anyway that system is not broken, and it is quite solid. this patch seems to be a 2.6.29 material. YH -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
