[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [PATCH v2 2/5] Mini-OS: get own domid
Hi Jan, On 10/11/2023 12:44, Jan Beulich wrote: On 10.11.2023 13:23, Roger Pau Monné wrote:On Fri, Nov 10, 2023 at 12:34:32PM +0100, Juergen Gross wrote:Get the own domid via creation of a temporary event channel. There is no "official" way to read the own domid in PV guests, so use the event channel interface to get it: - allocate an unbound event channel specifying DOMID_SELF for the other end - read the event channel status which will contain the own domid in unbound.dom - close the event channelShould we look into introducing a way to expose the domid, so that in the future we might not need to resort to this workarounds to get the domid? Maybe in the PV-specific cpuid leaf? It's a shame we didn't put it in a non-HVM specific leaf when it was made available to HVM for pvshim reasons.Couldn't we retroactively generalize the type-agnostic parts of that leaf? This would only work for x86. I think we want to have a generic hypercalls so it can be used by all arch. Cheers, -- Julien Grall
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