From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christian Zigotzky <chzigotzky@xenosoft.de>
Date: Tue, 05 Jul 2022 16:07:17 +0000
Subject: Re: [PATCH 2/2] kvm: rename KVM_MAX_VCPU_ID to, KVM_MAX_VCPU_IDS
Message-Id: <76d0db0f-57fe-2985-4916-175d913d99e4@xenosoft.de>
List-Id: <kvm-ppc.vger.kernel.org>
References: <6d3333b1-05cc-103b-4bdb-88bec5e3e9fd@xenosoft.de>
In-Reply-To: <6d3333b1-05cc-103b-4bdb-88bec5e3e9fd@xenosoft.de>
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
To: Juergen Gross <jgross@suse.com>
Cc: kvm@vger.kernel.org, x86@kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, kvm-ppc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-kselftest@vger.kernel.org, Paolo Bonzini <pbonzini@redhat.com>, Jonathan Corbet <corbet@lwn.net>, "Huacai Chen," <chenhuacai@kernel.org>, "Aleksandar Markovic," <aleksandar.qemu.devel@gmail.com>, "Thomas Bogendoerfer," <tsbogend@alpha.franken.de>, Paul Mackerras <paulus@ozlabs.org>, Michael Ellerman <mpe@ellerman.id.au>, "Benjamin Herrenschmidt," <benh@kernel.crashing.org>, Paul Mackerras <paulus@samba.org>, "Vitaly, Kuznetsov" <vkuznets@redhat.com>, Wanpeng Li <wanpengli@tencent.com>, Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>, Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>, "H. Peter Anvin" <hpa@zytor.com>, Shuah Khan <shuah@kernel.org>, Shuah Khan <skhan@linuxfoundation.org>, "R.T.Dickinson" <rtd2@xtra.co.nz>, Darren Stevens <darren@stevens-zone.net>, mad skateman <madskateman@gmail.com>

On 14 September 2021 at 05:59 pm, Christian Zigotzky wrote:
> Hello Juergen,
> Hello All,
>
> Since the RC1 of kernel 5.13, -smp 2 and -smp 4 don't work with a 
> virtual e5500 QEMU KVM-HV machine anymore. [1]
> I see in the serial console, that the uImage doesn't load. I use the 
> following QEMU command for booting:
>
> qemu-system-ppc64 -M ppce500 -cpu e5500 -enable-kvm -m 1024 -kernel 
> uImage -drive format=raw,file=MintPPC32-X5000.img,index=0,if=virtio 
> -netdev user,id=mynet0 -device virtio-net,netdev=mynet0 -append "rw 
> root=/dev/vda" -device virtio-vga -device virtio-mouse-pci -device 
> virtio-keyboard-pci -device pci-ohci,id=newusb -device 
> usb-audio,bus=newusb.0 -smp 4
>
> The kernels boot without KVM-HV.
>
> Summary for KVM-HV:
>
> -smp 1 -> works
> -smp 2 -> doesn't work
> -smp 3 -> works
> -smp 4 -> doesn't work
>
> I used -smp 4 before the RC1 of kernel 5.13 because my FSL P5040 BookE 
> machine [2] has 4 cores.
>
> Does this patch solve this issue? [3]
>
> Thanks,
> Christian
>
> [1] https://lists.ozlabs.org/pipermail/linuxppc-dev/2021-May/229103.html
> [2] http://wiki.amiga.org/index.php?title=X5000
> [3] 
> https://lists.ozlabs.org/pipermail/linuxppc-dev/2021-September/234152.html
Hello,

Since the RC5 of kernel 5.19, -smp 2 and -smp 4 work again. I don't know 
which patch has solved the issue.

Cheers,
Christian