[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] RE: [Xen-devel] [Q] Is qemu used when we use VTd?
>From: Akio Takebe >Sent: 2008年9月11日 19:48 > >Can we directly use MMCONFIG for PCI-Express card >pass-throughed by VT-d on HVM? > You can't. MMCONFIG in no sense vary from old I/O port style, as just a means to access PCI configuration space. Note that PCI configuration space access has to be trapped as it determines which devices, and also config space content to be observed by HVM guest. Normally you'd need some virtualization on config space content, such as BARs. Thus even by presenting MMCONFIG capability to HVM guest, you still need trap those access falling in that range. Thanks, Kevin _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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