[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH] xen/x86: Adjust stack pointer in xen_sysexit
On 11/16/2015 03:22 PM, Borislav Petkov wrote: On Mon, Nov 16, 2015 at 12:11:11PM -0800, Andy Lutomirski wrote:Are there really multiple feature bits for this stuff? I'd like to imagine that the entry code is all either Xen PV or native/PVH/PVHVM -- i.e. I assumed that PVH works like native for all entries. Almost. For PVH we will have a small stub to set up bootparams and such but then we jump to startup_{32|64} code. I just reacted to Boris' statement: "We don't currently have a Xen-specific CPU feature. We could, in principle, add it but we can't replace all of current paravirt patching with a single feature since PVH guests use a subset of existing pv ops (and in the future it may become even more fine-grained)." Actually, nevermind this --- I was thinking about APIC ops and they are not pv ops. Note though that there are other users of pv ops --- lguest and looks like KVM (for one op) use them too. -boris _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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