On Tue, Apr 25 2017 at 3:39:17 pm BST, Andre Przywara <andre.przywara@xxxxxxx> wrote: > Hi, > > another update to the ITS emulation series for kvmtool. > This addresses the comments Marc and Jean-Philippe had on the last > version (thanks for that!): I moved the DevID feature detection to avoid > static variables, rewrote the error path on creating IRQ routes and > extended the MMIO reservation to cover the ITS doorbell page as well. > Not sure if that's the right way to do, though. > Also we now ignore writes to the PBA region, which is what the spec > somewhat recommends. > ------------------------------------------- > > This series teaches kvmtool how to support KVM's ITS emulation. Also > (as this is somewhat related and has been co-developed) it enables GSI > routing for ARM/ARM64, which allows IRQFDs to be used, for instance > to use vhost_net. At the moment this is dependent on the guest > using the ITS emulation, but GICv2M support may be added at a later time. > > The first six patches are generic fixes and refactoring to pave the > road for the rest of the patches. Most importantly patch 3/15 pulls > the GSI routing code from x86 into generic code. > Patch 7 updates the Linux headers to pull the new ITS and 32-bit > GICv3 definitions in. This allows us to enable GICv3 emulation for 32-bit > ARM and also get rid of some placeholder lines in patch 8. > The following four patches add ITS emulation support. They reserve and > register the required ITS register frame and populate a DT node with > the necessary data. Also the patches add the required device ID to the > KVM_SIGNAL_MSI ioctl. > Patches 13 and 14 enable IRQ GSI routing for ARM/ARM64. > This is needed to use IRQFDs, which is a prerequisite for vhost > functionality, for instance. The code sets up the (dummy) SPI > routing table and adds the device ID to the routing entry. > The last patch finally enables the guest ITS support by extending the > existing --irqchip= parameter to allow "--irqchip=gicv3-its". > > These patches make use of the KVM kernel functionality merged into > 4.8-rc: both Eric's IRQ routing series and the ITS emulation. > It can also be found in my kvmtool git repository [1]. [...] Apologies for having dropped the ball on this series. Apart from the Linux include import which should be that of 4.11, this looks good to me. For the whole series: Acked-by: Marc Zyngier <marc.zyngier@xxxxxxx> Thanks, M. -- Jazz is not dead, it just smell funny.
