| Message ID | 1376372927-3510-1-git-send-email-michael@ellerman.id.au (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Tue, Aug 13, 2013 at 8:48 AM, Michael Ellerman <michael@ellerman.id.au> wrote: > On some powerpc systems, reboot is implemented by an RTAS call by the > name of "system-reboot". Currently we don't implement it in kvmtool, > which means instead the guest prints an error and spins. > > This is particularly annoying because when the guest kernel panics it > will try to reboot, and end up spinning in the guest. > > We can't implement reboot properly, ie. causing a reboot, but it's still > preferable to implement it as halt rather than not implementing it at > all. > > Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Applied, thanks Michael! -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/tools/kvm/powerpc/spapr_rtas.c b/tools/kvm/powerpc/spapr_rtas.c index f3c8fa3..43e5310 100644 --- a/tools/kvm/powerpc/spapr_rtas.c +++ b/tools/kvm/powerpc/spapr_rtas.c @@ -121,6 +121,19 @@ static void rtas_power_off(struct kvm_cpu *vcpu, kvm_cpu__reboot(vcpu->kvm); } +static void rtas_system_reboot(struct kvm_cpu *vcpu, + uint32_t token, uint32_t nargs, target_ulong args, + uint32_t nret, target_ulong rets) +{ + if (nargs != 0 || nret != 1) { + rtas_st(vcpu->kvm, rets, 0, -3); + return; + } + + /* NB this actually halts the VM */ + kvm_cpu__reboot(vcpu->kvm); +} + static void rtas_query_cpu_stopped_state(struct kvm_cpu *vcpu, uint32_t token, uint32_t nargs, target_ulong args, @@ -221,6 +234,7 @@ void register_core_rtas(void) spapr_rtas_register("get-time-of-day", rtas_get_time_of_day); spapr_rtas_register("set-time-of-day", rtas_set_time_of_day); spapr_rtas_register("power-off", rtas_power_off); + spapr_rtas_register("system-reboot", rtas_system_reboot); spapr_rtas_register("query-cpu-stopped-state", rtas_query_cpu_stopped_state); spapr_rtas_register("start-cpu", rtas_start_cpu);
On some powerpc systems, reboot is implemented by an RTAS call by the name of "system-reboot". Currently we don't implement it in kvmtool, which means instead the guest prints an error and spins. This is particularly annoying because when the guest kernel panics it will try to reboot, and end up spinning in the guest. We can't implement reboot properly, ie. causing a reboot, but it's still preferable to implement it as halt rather than not implementing it at all. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> --- tools/kvm/powerpc/spapr_rtas.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+)