[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH RFC v1 00/13] Introduce HMV without dm and new boot ABI
Hello, El 22/06/15 a les 19.55, Stefano Stabellini ha escrit: > Hi Roger, > > given that this patch series is actually using the Xen "hvm" builder, I > take that all the PVH code paths in Xen or the guest kernel are not > actually used, correct? This is more like PV on HVM without QEMU, right? From a Xen POV this is not a PVH guest (it's an HVM guest), although I'm using some code paths which are shared with PVH. In the guest (in this case FreeBSD) I'm using the same paths as PVH, since the exposed interface is very similar. We probably aim at enabling the same set of hypercalls that are enabled on PVH. > Do you think think this can work for Dom0 too? I don't see why it couldn't be made to work. > Would that make all the PVH stuff in Xen and Linux effectively useless? No, I expect that some code paths inside of Xen will be shared between PVH and this HVM-without-dm guest type. Then from a guest POV the interface is quite similar, so most of the code present in Linux and FreeBSD in order to run as a PVH guest can be reused for this new guest mode. If you take a look at the FreeBSD patch the change is just mostly during early boot in order to set the page tables and jump into long mode, then the rest is quite similar to PVH. Forgot to mention, I've also tested it with hap=0 (so using shadow) and it seems to work fine. Roger. _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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