[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [query] gic_set_lr always uses maintenance Interrupt
Hi, As per section 5.2.2 of IHI0048B_b_gic_architecture_specification, If hypervisor is injecting a VIRQ into guest, that is actually a HW IRQ, and guest does EOI (provided conditions) the maintenance interrupt is not needed. In xen arch/arm/gic.c always while setting an LR using gic_set_lr , the maintenance_int is enabled. Can some one clear the doubt on why it is done a) is this because EOI by guest would result in control back to hypervisor to replenish the LR for inflight, as there is otherwise no way to know in hypervisor that the LR is available. or b) some other reason ? _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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