如何更改 qemu 默认机器?

如何更改 qemu 默认机器?

我使用带有 qemu-kvm 的 Kubuntu 14.04 (x86_64 3.13.0-43-generic #72-Ubuntu)。

$ kvm --version
QEMU emulator version 2.0.0 (Debian 2.0.0+dfsg-2ubuntu1.9)

我怎样才能更改“默认”机器(现在它是下面显示的开箱即用值pc-i440fx-trusty)?

$ qemu-system-x86_64 -machine help
Supported machines are:    
pc-0.13              Standard PC (i440FX + PIIX, 1996)
pc-i440fx-2.0        Standard PC (i440FX + PIIX, 1996)
pc-1.0-qemu-kvm      Standard PC (i440FX + PIIX, 1996) (alias of pc-1.0)
pc-1.0               Standard PC (i440FX + PIIX, 1996)
pc-q35-1.7           Standard PC (Q35 + ICH9, 2009)
pc-1.1               Standard PC (i440FX + PIIX, 1996)
q35                  Standard PC (Q35 + ICH9, 2009) (alias of pc-q35-2.0)
pc-q35-2.0           Standard PC (Q35 + ICH9, 2009)
pc-i440fx-1.4        Standard PC (i440FX + PIIX, 1996)
pc-i440fx-1.5        Standard PC (i440FX + PIIX, 1996)
pc-0.14              Standard PC (i440FX + PIIX, 1996)
pc-0.15              Standard PC (i440FX + PIIX, 1996)
xenfv                Xen Fully-virtualized PC
pc-q35-1.4           Standard PC (Q35 + ICH9, 2009)
isapc                ISA-only PC
pc-0.10              Standard PC (i440FX + PIIX, 1996)
pc                   Ubuntu 14.04 PC (i440FX + PIIX, 1996) (alias of pc-i440fx-trusty)
pc-i440fx-trusty     Ubuntu 14.04 PC (i440FX + PIIX, 1996) (default)
pc-1.2               Standard PC (i440FX + PIIX, 1996)
pc-0.11              Standard PC (i440FX + PIIX, 1996)
pc-i440fx-1.7        Standard PC (i440FX + PIIX, 1996)
pc-i440fx-1.6        Standard PC (i440FX + PIIX, 1996)
none                 empty machine
xenpv                Xen Para-virtualized PC
pc-q35-1.5           Standard PC (Q35 + ICH9, 2009)
pc-1.0-precise       Standard PC (i440FX + PIIX, 1996) (alias of pc-1.0-qemu-kvm)
pc-1.0-qemu-kvm      Standard PC (i440FX + PIIX, 1996)
pc-q35-1.6           Standard PC (Q35 + ICH9, 2009)
pc-0.12              Standard PC (i440FX + PIIX, 1996)
pc-1.3               Standard PC (i440FX + PIIX, 1996)

我在 qemu_2.0.0~rc1 diff 中发现了这一点:

++/* Ubuntu machine types */
++
++static QEMUMachine pc_machine_trusty = {
++ PC_DEFAULT_MACHINE_OPTIONS,
++ .default_machine_opts = "firmware=bios-256k.bin",
++ .hot_add_cpu = pc_hot_add_cpu,
++ .name = "pc-i440fx-trusty",
++ .alias = "pc",
++ .desc = "Ubuntu 14.04 PC (i440FX + PIIX, 1996)", 
++ .init = pc_init_pci,
++ .is_default = 1,
++};

——所以我是否应该假设这个值是硬编码的,并且不能通过处理源和重新编译 qemu 来改变?

答案1

可以使用以下选项覆盖默认机器-machine

qemu-system-x86_64 -machine pc ...

进行相应更换pc

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