Re: xen cache colors in ARM

[Julien Grall <julien@xxxxxxx>]

+Stefano, + Bertrand, +Carlo,

On 18/04/2023 09:43, Oleg Nikitenko wrote:
> Hello,
Hi,

> I tried to turn on this scheme and ran into panic.
> Where was I wrong ?
This feature has not been merged in Xen upstream yet. So can you tell us 
what patches did you apply or which tree?
> Xen command line
> xen,xen-bootargs = "console=dtuart dtuart=serial0 dom0_mem=1600M
> dom0_max_vcpus=2 dom0_vcpus_pin bootscrub=0 vwfi=native sched=null
> timer_slop=0 way_szize=65536 xen_colors=0-3 dom0_colors=4-7";
Can you provide the following information:
 * HW
 * Where are the banks located?
 * Where do you load the various modules (e.g. kernel, xen...)?

> Xen config color build settings
> CONFIG_COLORING=y
>
> Xen log:
> (XEN) I/O virtualisation enabled
> (XEN)  - Dom0 mode: Relaxed
> (XEN) P2M: 40-bit IPA with 40-bit PA and 8-bit VMID
> (XEN) P2M: 3 levels with order-1 root, VTCR 0x0000000080023558
> (XEN) Scheduling granularity: cpu, 1 CPU per sched-resource
> (XEN) Coloring general information
> (XEN) Way size: 64kB
> (XEN) Max. number of colors available: 16
> (XEN) Xen color(s): [ 0 ]
> (XEN) alternatives: Patching with alt table 00000000002cc690 ->
> 00000000002ccc0c
> (XEN) Color array allocation failed for dom0
> (XEN)
> (XEN) ****************************************
> (XEN) Panic on CPU 0:
> (XEN) Error creating domain 0
> (XEN) ****************************************
> (XEN)
> (XEN) Reboot in five seconds...
Cheers,

--
Julien Grall