QEMU PCIe设备实现.pdf

发布时间：2022-06-05 发布人：admin 分类：说明书资料大小：0.03M 资料格式：pdf 举报版权申诉

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PCI Express support in qemu Isaku Yamahata, VA Linux Systems Japan K.K. Akio Takebe, Fujitsu Limited Xen Summit Asia Shanghai, China November 20, 2009

Agenda Introduction New chipset emulator in qemu Summary Future work

Introduction

Background Current Qemu emulates For Pentium Pro/II/III North bridge: I440FX South bridge: PIIX3 (and PIIX4 for acpi power management and pci hot plug) Hardware release date: May 1996 Too old compared to new real hardware features

Motivation More PCI features are wanted Currently Qemu only supports part of PCI specs. e.g.64bit BAR isn't supported. More buses/slots Qemu only supports single host bus (for PC emulation). Sub PCI bus isn't supported. 3+ pci bus(96+ slots)/96+ pcie slots are wanted. Brige emulation: filtering aren't implemented.

Motivation(cont.) PCI express features Hot plug, power management, ARI, AER Native pass through of PCI express device to guest OS PCI express devices can be passed through as PCI device, though. Need to fill those gap between newer real hardware features and qemu emulation mainly in PCI related area.

New chipset emulator for new hardware features

Why new chipset? Keep the currently supported chipset(I440FX, PIIX) for legacy compatibility. Old OSes must run on it. add new features for modern OSes without legacy compatibility.

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