Re: KVM guest sometimes failed to boot because of kernel stack overflow if KPTI is enabled on a hisilicon ARM64 platform.

[Marc Zyngier]

On 21/06/18 09:38, James Morse wrote:

>> (joyx@Turing-Arch-b) (gcc version 4.9.1 20140505 (prerelease) (crosstool-NG
>> linaro-1.13.1-4.9-2014.05 - Linaro GCC 4.9-2014.05)) #10 SMP PREEMPT Wed Jun 20
>> 23:59:05 CST 2018
> 
>>     [    0.000000] CPU0: using LPI pending table @0x000000007d860000
>>     [    0.000000] GIC: PPI11 is secure or misconfigured
>>     [    0.000000] arch_timer: WARNING: Invalid trigger for IRQ3, assuming level
>> low
>>     [    0.000000] arch_timer: WARNING: Please fix your firmware
>>     [    0.000000] arch_timer: cp15 timer(s) running at 100.00MHz (virt).
> 
> (No idea what these mean, but I doubt they are relevant)

Old (and buggy) QEMU. Nothing to worry about, the kernel (and the vgic)
will do the right thing. A modern QEMU presents the guest with a fixed
DT, removing the warning altogether.

Nothing to do with the issue at hand anyway.

	M.
-- 
Jazz is not dead. It just smells funny...