Hi Marc, On 21/10/2016 10:45, Marc Zyngier wrote: > +Robert > > On 21/10/16 08:01, Auger Eric wrote: >> Hi, >> >> I am not able to boot 4.9-rc1 as a guest on Cavium ThunderX (dt and acpi >> mode). Bisecting the guest shows that the problem shows up at >> >> 91ef84428a86b75a52e15c6fe4f56b446ba75f93 >> irqchip/gic-v3: Reset BPR during initialization >> >> If I remove the write to the ICC_BPR1_EL1 register on guest, the VM boots. > > That's very odd. A ICC_BPR1_EL1 access when HCR_EL2.IMO is set only > affects ICH_VMCR_EL2.VBPR1. It is not trapped, since we don't set > ICH_HCR_EL2.TALL1. It is a very boring sysreg! > > So from a pure architectural point of view, I don't see how this can > fail. I've just run the same configuration on my Freescale board (GICv3 > as well), and can't see any issue at all. > >> Investigating KVM code ... > > What is the failure syndrome? Do you see it crashing? Locking up? What > is the PC at that stage? No guest crash. the guest just locks up. No traces output. Thanks Eric > > Thanks, > > M. > -- 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
