[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Hypercall-page initialization
On 2/7/06, Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> wrote: > We can make the hypercall for filling the page one that can be executed > by unpriv domains (i.e., make it not a dom0_op). That would be fine with me, though I guess purists would argue that it would remove some flexibility, e.g. int 0x82 (or another hardcoded trap vector) would have always have to be supported. > Or if you want to fill it in from within the domU, how about if we did > something like reserve some space of MSRs for Xen use (e.g., hex > Bxxxxxxx). Then we could say that, if the guest writes an MFN to a > particular one of those MSRs, it gets filled with hypercall-page > goodness. :-) Hmm would that work in paravirt mode also? I guess Xen would trap the exception and do the right thing? I suppose this has the advantage of avoiding any hardcoded trap vectors. > -- Keir Jacob _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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