Hi, I want to trace the PCI device accesses (config space, I/O ports, memory BARs) of a DOS application (EEPROM flasher) and it seems KVM can help with this. The current plan is to install KVM, use FreeDOS as a guest, activate passthrough for the PCI device I'm interested in and log the accesses somehow.
Possible problems I'd have to solve: - According to http://www.linux-kvm.org/wiki/images/d/d0/KvmForum2008$kdf2008_14.pdf PCI device passthrough needs a CPU with VT-d/IOMMU support. - http://www.linux-kvm.org/page/TODO says passthrough won't work for conventional PCI devices (I assume a PCI graphics card is such a device). - http://www.linux-kvm.org/page/TODO says passthrough won't work for devices without Function Level Reset (FLR). - http://www.linux-kvm.org/page/TODO says VT support for real mode is not good, so FreeDOS might be a problem. - The KVM wiki does not mention how to get PCI passthrough working. - No idea if logging of PCI accesses is possible with KVM or if I have to use helper tools for that. Any insights/hints are appreciated. If KVM is the wrong tool for my task, please point me in the right direction. Please CC me as I'm not subscribed to the list. Thanks. Regards, Carl-Daniel P.S. The linux-kvm.org wiki returns zero results if you search the wiki text for "PCI", but a Google search finds quite a few pages mentioning PCI. Is there a bug in the seach function? -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
