[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH v2 10/27] ARM: GICv3: forward pending LPIs to guests
On 03/04/17 15:18, Andre Przywara wrote: Hi, Hi Andre, On 24/03/17 12:03, Julien Grall wrote:+ /* We may have mapped more host LPIs than the guest actually asked for. */Another way, is the interrupt has been received at the same time the guest is configuring it. What will happen if the interrupt is lost?I don't see how this would be our problem. If the guest is still about to configure an LPI, then any incoming one is pretty clearly a spurious interrupt. I take it that you mean "mapping an LPI using ITS commands" when you say "configuring" here. If this is not what you mean, please correct me. I'd expect a guest to first map the LPI, then enable it and send an INV command. Doing that differently will not result in any sane behavior (as in: a guest cannot expect an LPI to come through), so nothing we need to worry about (from a lost IRQ perspective). Or what do I miss here? All host LPIs will be enabled when a device is assigned to a guest. So technically an LPI can come at anytime before the guest is configuring the virtual mapping. Cheers, -- Julien Grall _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx https://lists.xen.org/xen-devel
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