On 10/04/2015 09:48, Eric Auger wrote: > After the introduction of gicv2m, this series adds missing pieces to > run VIRTIO-PCI with vhost back-end on ARM. > > It is proposed to use the kvm_gsi_direct_mapping modality that sets > the irqfd gsi to the MSI data value. With that trick there is no need > to create a KVM MSI routing entry featuring a different gsi. > > The only adaptation needed for ARM consists in adding an architecture > specific function that converts the MSI data field into the actual > gsi index: there is an offset of 32 between the MSI data content > (SPI ID) and the SPI index that is passed to KVM_IRQFD ioctl. Once > this is done we can set the requested flags to enable vhost: > kvm_gsi_direct_mapping, kvm_msi_via_irqfd_allowed. > > This was tested on XGene, on top of Christoffer's series, > [PATCH 0/3] Add support for for GICv2m and MSIs to arm-virt > (https://lists.gnu.org/archive/html/qemu-devel/2015-04/msg00881.html) > > Best Regards > > Eric > > v1 -> v2: > - abort on i386/mips/s390x since those archs do not support > kvm_gsi_direct_mapping Patch 1 is okay. I guess this series will go through some ARM tree. Paolo _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
