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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH v2 3/9] x86/mm: honor opt_pcid also for 32-bit PV domains
On 17.09.2019 21:00, Andrew Cooper wrote: > On 17/09/2019 07:14, Jan Beulich wrote: >> I can't see any technical or performance reason why we should treat >> 32-bit PV different from 64-bit PV in this regard. > > Well, other than the fact this setting is only read for a 64bit guest... How come? make_cr3() uses it uniformly, as does pv_make_cr4(). toggle_guest_mode() is the one case where it's strictly 64-bit guest only. > The reason it isn't set for 32bit guests is that there is no scenario > where we use it. "pcid=1" and "pcid=noxpti" both are scenarios where, with this patch in place, we would use it. Jan _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxxx https://lists.xenproject.org/mailman/listinfo/xen-devel
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