On Mon, Jul 25, 2016 at 04:07:20PM +0100, Marc Zyngier wrote: > On 25/07/16 15:28, Andrew Jones wrote: > > On Mon, Jul 25, 2016 at 03:05:46PM +0100, Marc Zyngier wrote: > >> News flash: Mark Rutland just saw it crashing on his Seattle using my > >> kernel that doesn't crash on mine. So we're looking at external factors > >> now. DT, firmware, whatever. > > > > Interesting, especially with the information that the bug is also > > on v7 with uboot (where it's present with 4k pages), and on v8 > > with UEFI (where it's not present with 4k pages, only 64k) > > Here's what I get with Mark's DT: > > [ 2.199618] kvm [1]: 8-bit VMID > [ 2.202756] kvm [1]: Hyp mode initialized successfully > [ 2.207907] kvm [1]: GICV size 0x2000 not a multiple of page size 0x10000 > [ 2.214736] kvm [1]: virtual timer IRQ4 > > Somehow, we fail to detect that we cannot run with 64k pages, > because we cannot safely pass the 8kB region to the guest. > KVM should fail to initialize, or at least report that there > is no VGIC. Drew, is that what you have on your system as well? Yup, precisely. I wish I would have grepped and reported that before... I also now see that when booting with old vgic and 64k pages I get an additional message after the GICV... line [ 1.889241] kvm [1]: error: KVM vGIC probing failed So we should port that error message over. Thanks, drew > > That doesn't explain Stefan's issue though. > > Thanks, > > M. > -- > Jazz is not dead. It just smells funny... _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
