On Wed, Sep 28, 2016 at 09:35:21AM -0600, Jan Beulich wrote: > >>> On 27.09.16 at 17:56, <roger....@citrix.com> wrote: > > This is also required for PVHv2 guests if they want to use real-mode, and > > hvmloader is not executed for those kind of guests. > > While the intention is fine, I'm not convinced of consuming yet another > special page here: Other than the way hvmloader's allocation works, > here you permanently take away a page from the guest unconditionally > which (a) is used only on VMX, (b) only on old hardware, and (c) VMX > code appears to even be able to help itself without this TSS (at the > price of doing more emulation).
Yes, real mode should also work without this. Given that I don't think we expect real-mode to be used for mostly anything but early AP initialization, I guess we could just leave PVHv2 guests without the TSS. Roger. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
