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microvm: add second ioapic

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Create second ioapic, route virtio-mmio IRQs to it,
allow more virtio-mmio devices (24 instead of 8).

Needs ACPI, enabled by default, can be turned off
using -machine ioapic2=off

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Sergio Lopez <slp@redhat.com>
Message-id: 20201203105423.10431-8-kraxel@redhat.com
This commit is contained in:
Gerd Hoffmann 2020-12-03 11:54:18 +01:00
parent e57e9ae799
commit 4d01b8994c
3 changed files with 57 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

2
include/hw/i386/microvm.h
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@ -72,6 +72,7 @@
#define MICROVM_MACHINE_PIC "pic"
#define MICROVM_MACHINE_RTC "rtc"
#define MICROVM_MACHINE_PCIE "pcie"
#define MICROVM_MACHINE_IOAPIC2 "ioapic2"
#define MICROVM_MACHINE_ISA_SERIAL "isa-serial"
#define MICROVM_MACHINE_OPTION_ROMS "x-option-roms"
#define MICROVM_MACHINE_AUTO_KERNEL_CMDLINE "auto-kernel-cmdline"
@ -90,6 +91,7 @@ struct MicrovmMachineState {
OnOffAuto pit;
OnOffAuto rtc;
OnOffAuto pcie;
OnOffAuto ioapic2;
bool isa_serial;
bool option_roms;
bool auto_kernel_cmdline;