[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Callbacks for domU into dom0
At 16:46 31/10/2007, Tomá? Kouba wrote: Hello, is there a way how to be informed (called back) in dom0, when a specific action is taken in domU? I would like to react on a system call being issued in domU. If this is impossible is there any other action in domU that I can hook my function on? The Xen kernel doesn't know (or care) about Linux (or Windows) system calls as such. Some system calls will "do things" that the Xen kernel does care about, such as update page tables, which will cause an entry into the Xen kernel. The only way for Xen to "know" about a system call would be if you modify the system call itself to perform some sort of operation that causes the Xen kernel to get involved with that. You could for example fake a MSR read or write [by "fake" I mean to a unused MSR number] operation inside the syscall , and then update the MSR read or write function to detect your system call. Does this help you? -- Mats Thank you very much, -- Tomas Kouba _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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