André, On Tuesday 27 May 2014 16:20:46 André Eberle wrote: > I am trying to achieve host guest communication, through DMA in a guest > driver. Also, I am trying to capture the result in the host process, and > act on it. Could you point me to sources with examples of this behavior? It > seems something similar is already done currently in the VirtualBox, is it > so?
as I understand correctly, you intend to establish a communication between host and guest where you can transfer bigger amounts of data. One example would be the shared folders service. The guest part is located at src/VBox/Additions/common/VBoxGuestLib/VBoxGuestR0LibSharedFolders.c (guest ring 0 abstraction for shared folders functions) src/VBox/Additions/linux/sharedfolders/ (guest ring 0 Linux driver) while the host part is located at src/VBox/HostServices/SharedFolders The HGCM abstraction is a bit different from the emulation of a physical device. The guest is issuing HGCM requests to the host. If the host is able to fulfil the request immediately, it will, otherwise the host returns VINF_HGCM_ASYNC_EXECUTE and the VBox guest driver will call a callback function when the request can finally be fulfilled. Hope that helps, Frank -- Dr.-Ing. Frank Mehnert | Software Development Director, VirtualBox ORACLE Deutschland B.V. & Co. KG | Werkstr. 24 | 71384 Weinstadt, Germany Hauptverwaltung: Riesstr. 25, D-80992 München Registergericht: Amtsgericht München, HRA 95603 Geschäftsführer: Jürgen Kunz Komplementärin: ORACLE Deutschland Verwaltung B.V. Hertogswetering 163/167, 3543 AS Utrecht, Niederlande Handelsregister der Handelskammer Midden-Niederlande, Nr. 30143697 Geschäftsführer: Alexander van der Ven, Astrid Kepper, Val Maher _______________________________________________ vbox-dev mailing list [email protected] https://www.virtualbox.org/mailman/listinfo/vbox-dev
