> 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. Alex -- 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
