[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [Draft F] Xen on ARM vITS Handling
On Fri, 2015-06-12 at 09:09 -0400, Julien Grall wrote: > Hi Ian, > > On 12/06/2015 04:52, Ian Campbell wrote: > > On Fri, 2015-06-12 at 14:07 +0530, Vijay Kilari wrote: > > So pLPIs must be routed at device assignment time because in the vLPI > > configuration table trap there is no mapping back to a single pLPI. > > I just remembered the exact reason that made use to differ SPI enabling. I can't parse this sentence, differ how? > When the device is assigned, the domain VCPUs are still down (even VCPU0). > > If we receive an interrupt before the VCPU0 is unpaused, the interrupt > will be lost. Same if the interrupt is not yet configured (i.e before > the vITS setup correctly the table) with your proposal. Is this any different to booting with the ITT not setup? (SPIs are a slightly different case because they don't need h/w routing) > This could happen when the device is not quiescent. We had this issue on > the vexpress at boot time when the network card was trying to send an > interrupt before DOM0 is setup. I don't fully understand the issue you are trying to describe, but do you want to propose a change to the spec? Ian. _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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