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Different versions of PC machine support different maximum vCPUs, and even different features have limits on the maximum number of vCPUs ( For example, if x2apic is not enabled in the TCG case, the maximum of 255 vCPUs are supported). It is difficult to list the maximum vCPUs under all restrictions. Thus, to avoid confusion, avoid mentioning specific maximum vCPU number limitations here. Suggested-by: Daniel P. Berrangé <berrange@redhat.com> Signed-off-by: Zhao Liu <zhao1.liu@intel.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Message-ID: <20240606085436.2028900-1-zhao1.liu@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
83 lines
2.0 KiB
HTML
83 lines
2.0 KiB
HTML
The QEMU PC System emulator simulates the following peripherals:
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- i440FX host PCI bridge and PIIX3 PCI to ISA bridge
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- Cirrus CLGD 5446 PCI VGA card or dummy VGA card with Bochs VESA
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extensions (hardware level, including all non standard modes).
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- PS/2 mouse and keyboard
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- 2 PCI IDE interfaces with hard disk and CD-ROM support
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- Floppy disk
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- PCI and ISA network adapters
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- Serial ports
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- IPMI BMC, either and internal or external one
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- Creative SoundBlaster 16 sound card
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- ENSONIQ AudioPCI ES1370 sound card
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- Intel 82801AA AC97 Audio compatible sound card
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- Intel HD Audio Controller and HDA codec
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- Adlib (OPL2) - Yamaha YM3812 compatible chip
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- Gravis Ultrasound GF1 sound card
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- CS4231A compatible sound card
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- PC speaker
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- PCI UHCI, OHCI, EHCI or XHCI USB controller and a virtual USB-1.1
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hub.
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SMP is supported with a large number of virtual CPUs (upper limit is
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configuration dependent).
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QEMU uses the PC BIOS from the Seabios project and the Plex86/Bochs LGPL
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VGA BIOS.
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QEMU uses YM3812 emulation by Tatsuyuki Satoh.
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QEMU uses GUS emulation (GUSEMU32 http://www.deinmeister.de/gusemu/) by
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Tibor \"TS\" Schütz.
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Note that, by default, GUS shares IRQ(7) with parallel ports and so QEMU
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must be told to not have parallel ports to have working GUS.
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.. parsed-literal::
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|qemu_system_x86| dos.img -device gus -parallel none
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Alternatively:
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.. parsed-literal::
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|qemu_system_x86| dos.img -device gus,irq=5
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Or some other unclaimed IRQ.
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CS4231A is the chip used in Windows Sound System and GUSMAX products
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The PC speaker audio device can be configured using the pcspk-audiodev
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machine property, i.e.
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.. parsed-literal::
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|qemu_system_x86| some.img \
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-audiodev <backend>,id=<name> \
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-machine pcspk-audiodev=<name>
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Machine-specific options
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~~~~~~~~~~~~~~~~~~~~~~~~
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It supports the following machine-specific options:
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- ``x-south-bridge=PIIX3|piix4-isa`` (Experimental option to select a particular
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south bridge. Default: ``PIIX3``)
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