On 2012-10-26 12:15, Paolo Bonzini wrote: > Il 26/10/2012 12:09, Peter Maydell ha scritto: >>>> >>>> The other problem is configuring the redirection table. If you need >64 >>>> sources you need ioctls like KVM_GET/SET_IRQCHIP_ONE_REG. >> Why would you want an extra ONE_REG-like ioctl? The existing ONE_REG >> ioctls have plenty of space in the ID range to allow you to devote >> a subsection of it to your irqchip. (This is exactly how the ARM >> VGIC save/load is going to work.) > > Ok, I stand corrected. :) > >> Whether you want to do startup configuration and board wiring via >> the same ioctl that handles runtime state save/load/migration is >> a different question, of course. > > QEMU's MSI-X routing is not x86-specific, so it should use the same > KVM_SET_GSI_ROUTING ioctl that x86 uses. And it's not only MSI[-X]. Most IRQ sources need to be rounted, either from userspace or from irqfd or from some other in-kernel source to a specific IRQ controller. That allows to customize things according to a specific board / SoC emulation. Jan -- Siemens AG, Corporate Technology, CT RTC ITP SDP-DE Corporate Competence Center Embedded Linux -- 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
