Hello! > How do boards other than 'virt' work when emulated without KVM? Under "emulated without KVM" we normally suppose full software emulation (known in qemu as TCG). In this case CPU code is interpreted, and KVM is not used at all. Some boards (like vexpress) have own platform-specific timer, so they can work under KVM without CP15 timer. In order to make it working one should either disable CP15 timer in guest .config or remove the node from device tree. CP15 timer never worked in this configuration (KVM without irqchip). > It must be possible to emulate the physical timer in QEMU. Of course it is, and with TCG it works. But we currently cannot use it with KVM because KVM assumes that it emulates all CP15 (or system) registers by itself, and never hands any of them outside. Kind regards, Pavel Fedin Expert Engineer Samsung Electronics Research center Russia -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
