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Re: [Qemu-ppc] PPC970: "CPU requires an RMO"

From: David Gibson
Subject: Re: [Qemu-ppc] PPC970: "CPU requires an RMO"
Date: Fri, 9 Dec 2011 13:06:13 +1100
User-agent: Mutt/1.5.21 (2010-09-15)

On Tue, Dec 06, 2011 at 09:47:37PM -0800, red f1sh wrote:
> Hello,
> I'm trying to use qemu-kvm on a ppc970 box, and when I try to execute
> qemu-system-ppc64 with -enable-kvm I'm getting an "Invalid argument"
> message and "CPU requires an RMO" in dmesg. For example:
> # /usr/local/bin/qemu-system-ppc64 -kernel /boot/vmlinux-3.2.0-rc4 -m 1024
> -initrd /boot/ramdisk.dr.gz -enable-kvm -mem-path /HTLBFS/
> kvm_set_phys_mem: error registering slot: Invalid argument
>  Aborted (core dumped)
> In dmesg I get:
> KVM guest htab at c00000013f000000, LPID 1
> CPU requires an RMO
> I think I have everything setup correctly, I have the "kvm_rma_count"
> kernel parameter set and (as far as I can tell) hugetlbfs is setup
> correctly. Meminfo looks like:
> # cat /proc/meminfo | grep -i huge
> HugePages_Total:     296
> HugePages_Free:      296
> HugePages_Rsvd:        0
> HugePages_Surp:        0
> Hugepagesize:      16384 kB
> I'm sure I'm missing something, anyone have any ideas?

What sort of 970 machine is it?

I'm guessing you want the pseries target machine, in which case you'll
need '-M pseries'.  You may also need to explicitly specify the
modelled CPU with '-cpu 970MP' or similar.  Although I think current
qemu defaults to '-cpu host' with kvm, which should accomplish the
same thing.

David Gibson                    | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au  | minimalist, thank you.  NOT _the_ _other_
                                | _way_ _around_!

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