+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?
Thanks,
M.
--
Jazz is not dead. It just smells funny...
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