On 28/10/16 16:52, Alexander Graf wrote: > > >> Am 28.10.2016 um 16:38 schrieb Marc Zyngier <marc.zyngier@xxxxxxx>: >> >> Alex, >> >>> On 30/09/16 20:31, Alexander Graf wrote: >>> >>> >>>> On 30.09.16 17:43, Christoffer Dall wrote: >>>>> On Fri, Sep 30, 2016 at 05:38:11PM +0200, Alexander Graf wrote: >>>>> >>>>> >>>>>> On 30.09.16 16:54, Alexander Graf wrote: >>>>>> >>>>>> >>>>>>> On 27.09.16 21:08, Christoffer Dall wrote: >>>>>>> Hi Alex, >>>>>>> >>>>>>> Marc and I have been looking at this during Linaro connect and have >>>>>>> slightly reworked your patch into this small series. >>>>>>> >>>>>>> It would be good if you could have a look at it and test it out. >>>>>>> >>>>>>> I've tested it with your QEMU, and it works for UP, but secondary CPUs >>>>>>> fail to come up, and it looks like the kernel never gets an IPI for >>>>>>> those CPUs from userspace. Any chance you're willing to take a look at >>>>>>> that? >>>>>> >>>>>> I still need to see whether I can come up with a prettier solution, but >>>>>> for now this works: >>>>>> >>>>>> diff --git a/target-i386/kvm.c b/target-i386/kvm.c >>>>> >>>>> Eh, no, not in i386 code :). But the problem seems to be a missing >>>>> mpstate sync. >>>>> >>>> Yeah, that looked really dodgy. Have you tested it? :) >>> >>> This time around tested with the correct command line parameters I hope >>> :). I'll send a pretty patch later. >>> >>> diff --git a/target-arm/kvm.c b/target-arm/kvm.c >>> index b4c8fe2..b549f00 100644 >>> --- a/target-arm/kvm.c >>> +++ b/target-arm/kvm.c >>> @@ -173,6 +173,12 @@ int kvm_arch_init(MachineState *ms, KVMState *s) >>> */ >>> kvm_async_interrupts_allowed = true; >>> >>> + /* >>> + * PSCI wakes up secondary cores, so we always need to >>> + * have vCPUs waiting in kernel space >>> + */ >>> + kvm_halt_in_kernel_allowed = true; >>> + >>> cap_has_mp_state = kvm_check_extension(s, KVM_CAP_MP_STATE); >>> >>> type_register_static(&host_arm_cpu_type_info); >> >> What the status of userspace for this thing? Are QEMU patches being >> posted and reviewed? > > I didn't see a notification that the patches were merged. Are they in > Linus' tree yet? Then I can post enablement to qemu-devel. I think you got it backward. I have no intention of merging them until I see a vague consensus on the userspace API, and a set of patches ready to be merged in QEMU. Thanks, M. -- Jazz is not dead. It just smells funny... -- 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
