[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH v2] x86/irq: Probe for PIC presence before allocating descs for legacy IRQs
On 11/16/2015 04:39 PM, Thomas Gleixner wrote: On Mon, 16 Nov 2015, Boris Ostrovsky wrote:Xen expects legacy interrupts to be there (pretty much for the same reason as Hyper-V does) and with this change arch_probe_nr_irqs() returns zero and no descriptors are allocated.Right, because everything which has a PIT gets them and everything which does not have a PIT does not.We can allocate those descriptors as needed in xen_irq_init() (if we know that IRQs are legacy), although that would look somewhat ugly and out of place.Why preallocating them in xen_irq_init()? You simply can remove the NR_IRQS_LEGACY checks in xen_allocate_irq_gsi/xen_free_irq(), right? Of course. Thanks. -boris _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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