On Tue, Apr 11, 2017 at 9:51 PM, Will Deacon <[email protected]> wrote: > On Tue, Apr 11, 2017 at 04:54:26PM +0100, Robin Murphy wrote: >> On 11/04/17 15:42, [email protected] wrote: >> > From: Geetha <[email protected]> >> > >> > Cavium 99xx SMMU implementation doesn't not support unique irq lines for >> > gerror, eventq and cmdq-sync. USE_SHARED_IRQS option enables to use single >> > irq line for all three interrupts. >> >> AFAICS, there's nothing actually wrong with using shared wired IRQs - >> the architecture spec doesn't appear to say anything about it. I think >> it might suffice to simply add IRQF_SHARED if we can see the SMMU >> doesn't support MSIs anyway - it doesn't really seem like something we >> need to treat as a specific quirk. > > No, this is not permitted by the spec. See 3.18.2 ("Interrupt sources"), > where it's clear that each source asserts a *unique* wired interrupt. > > Geetha: does your implementation support MSIs? > > Will
No, this silicon doesn't support MSIs. Thanks, Sunil. _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
