On 17 October 2013 10:21, Marc Zyngier <marc.zyngier@xxxxxxx> wrote: > On 17/10/13 10:10, Peter Maydell wrote: >> On 17 October 2013 09:37, Marc Zyngier <marc.zyngier@xxxxxxx> wrote: >>> On 16/10/13 18:02, Anup Patel wrote: >>>> The PSCI SYSTEM_OFF and SYSTEM_RESET functions are VM or Guest level >>>> functions hence cannot be emulated by the in-kernel PSCI emulation code. >>> >>> Why can't we implement system-wide functionality in the kernel? I fail >>> to see the issue here. >> >> Because the kernel isn't emulating the whole board, and you need >> to power off or reset the whole board, not just the CPUs. > > In which case we can forward a generic event, once KVM has dealt with > the CPUs. Ideally per-CPU reset should be driven by userspace, incidentally. We ought to have an ioctl for "hey, reset this CPU': at the moment we have to fake it up by having QEMU feed the CPU back the register values it read on powerup, which is kind of ugly. -- PMM _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/cucslists/listinfo/kvmarm
