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id = 2555
title = "Can't start a guest with 2 IOAPICs"
state = "opened"
created_at = "2024-09-04T07:57:28.018Z"
closed_at = "n/a"
labels = ["target: i386"]
url = "https://gitlab.com/qemu-project/qemu/-/issues/2555"
host-os = "Ubuntu 22.04"
host-arch = "x86_64"
qemu-version = "QEMU emulator version 6.2.0 (Debian 1:6.2+dfsg-2ubuntu6.22)"
guest-os = "Ubuntu 18.04"
guest-arch = "x86_64"
description = """For a host with multiple IOAPICs, I want to start a guest with 2 IOAPICs. I saw this commit about this function: **[x86: add support for second ioapic]**:
https://gitlab.com/qemu-project/qemu/-/commit/94c5a606379ddd04beecdb11fb34b51b4b28c7f2
But after I started a guest in a host with multiple IOAPICs, there was still only one IOAPIC in guest. How should I enable this feature?"""
reproduce = "n/a"
additional = """Host IOAPICs Info:
```
[ 1.268280] IOAPIC[0]: apic_id 0, version 33, address 0xfec00000, GSI 0-23
[ 1.268286] IOAPIC[1]: apic_id 1, version 33, address 0xfec20000, GSI 24-55
[ 1.268291] IOAPIC[2]: apic_id 2, version 33, address 0xd9000000, GSI 56-87
[ 4.415313] ACPI: Using IOAPIC for interrupt routing
```
Guest IOAPIC Info:
```
[ 0.000000] IOAPIC[0]: apic_id 0, version 17, address 0xfec00000, GSI 0-23
[ 0.255045] ACPI: Using IOAPIC for interrupt routing
```"""
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