On 2016/4/28 9:50, RAVINDRA KUMAR SANDE wrote: > > What I did : > 1) Just for investigation, I took a ARMv8 ( OdroidC2 ) board > 2) I compiled Linux 3.14 with KVM support for this ARMv8 ( OdroidC2 ) > board, with modification replacing meson_timer by arm timer in its dts > file. > Why Linux 3.14 : I took Linux 3.14 because display drivers for this > board are officially for this version; and I am interested in seeing > some Linux guest booting with display on. > 3) I see from boot log of that KVM is initialized successfully, and I > can see /dev/kvm node. > 4) I built latest Qemu with --enable-kvm on this board natively. > > What I find : > 1) running "qemu-system-arm -enable-kvm -machine vexpress-a9 ...." > gives error : no accelerator found > 2) running "qemu-system-aarch64 -enable-kvm -machine vexpress-a9 ...." > gives error : kmv_init_vcpu (IOCtl on /dev/kvm) failed, guest not supported > ( I experimented some modifications as well to overcome above error, > such as replacing value assigned to cpu->kvm_target etc, but IOCtl call > is failing) > > Query: > 1) Does Arm64 Linux not enable KVM support for Arm32 guest ? > 2) Can qemu-system-arm not use the KVM feature on Arm64 host ? > 3) Can qemu-system-aarch64 not use KVM feature for Arm32 guest ? > You can use below command to boot a ARM32 guest on ARM64： qemu-system-aarch64 -enable-kvm -machine virt,kernel_irqchip=on -cpu host,aarch64=off .... -- Shannon _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
