<div dir="ltr"><div class="gmail-_3xX726aBn29LDbsDtzr_6E gmail-_1Ap4F5maDtT1E1YuCiaO0r gmail-D3IL3FD0RFy_mkKLPwL4" style="max-width:800px"><div class="gmail-_292iotee39Lmt0MkQZ2hPV gmail-RichTextJSON-root">Hello to everyone. I've installed Ubuntu 14.04 + kernel 3.13 + kvm on my Samsung Chromebook ARM "SNOW" model XE303C12. Almost everything works (but not the mouse usb). My goal is to upgrade Ubuntu (kernel and userland and I want to keep kvm enabled). So,I've got a new kernel sources from this link : <a href="https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.4.244.tar.xz" class="gmail-_3t5uN8xUmg0TOwRCOGQEcU" rel="noopener nofollow ugc" target="_blank">https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.4.244.tar.xz</a> I have unpacked it and I've added at the bottom of the .config file these lines : <pre class="gmail-_3GnarIQX9tD_qsgXkfSDz1"><code class="gmail-_34q3PgLsx9zIU5BiSOjFoM">CONFIG_HAVE_KVM_IRQCHIP=y CONFIG_KVM_MMIO=y CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT=y CONFIG_VIRTUALIZATION=y CONFIG_KVM=y CONFIG_KVM_ARM_HOST=y CONFIG_KVM_ARM_MAX_VCPUS=2 CONFIG_KVM_ARM_VGIC=y CONFIG_KVM_ARM_TIMER=y </code></pre> I tried to add those lines directly on the .config file editing the file with nano because as soon as I have wrote "make menuconfig",I saw that the KVM entries weren't there,as you can see : <a href="https://ibb.co/WcXPTj5" class="gmail-_3t5uN8xUmg0TOwRCOGQEcU" rel="noopener nofollow ugc" target="_blank">https://ibb.co/WcXPTj5</a> Unfortunately those lines don't stick on the kernel config file. When I save it and I reopen it,I see that the kvm lines have been deleted. (I'm trying to compile the 5.4 kernel directly on the chromebook using an SSH connection). As a second attempt I've used the kernel config file offered by virtual open systems on their guide here : <a href="http://www.virtualopensystems.com/en/solutions/guides/kvm-on-chromebook/" class="gmail-_3t5uN8xUmg0TOwRCOGQEcU" rel="noopener nofollow ugc" target="_blank">http://www.virtualopensystems.com/en/solutions/guides/kvm-on-chromebook/</a> I've added the kvm entries (this time they stuck) and then I tried to recompile it with the command : <pre class="gmail-_3GnarIQX9tD_qsgXkfSDz1"><code class="gmail-_34q3PgLsx9zIU5BiSOjFoM">ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- make uImage dtbs -j2 </code></pre> and also : <pre class="gmail-_3GnarIQX9tD_qsgXkfSDz1"><code class="gmail-_34q3PgLsx9zIU5BiSOjFoM">make uImage dtbs -j2 </code></pre> This is the compiler that I'm using : <pre class="gmail-_3GnarIQX9tD_qsgXkfSDz1"><code class="gmail-_34q3PgLsx9zIU5BiSOjFoM">gcc --version gcc (Ubuntu/Linaro 4.8.2-19ubuntu1) 4.8.2 </code></pre> but this is what happened : <pre class="gmail-_3GnarIQX9tD_qsgXkfSDz1"><code class="gmail-_34q3PgLsx9zIU5BiSOjFoM">root@marietto-Z87-HD3:/home/ziomario/Desktop/linux-5.4.244# ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- make uImage dtbs -j4 scripts/kconfig/conf --syncconfig Kconfig CC scripts/mod/empty.o CC scripts/mod/devicetable-offsets.s MKELF scripts/mod/elfconfig.h HOSTCC scripts/mod/modpost.o HOSTCC scripts/mod/sumversion.o HOSTCC scripts/mod/file2alias.o HOSTLD scripts/mod/modpost CC kernel/bounds.s CALL scripts/atomic/check-atomics.sh CC arch/arm/kernel/asm-offsets.s arch/arm/kernel/asm-offsets.c:45:2: error: #error Your compiler is too buggy; it is known to miscompile kernels #error Your compiler is too buggy; it is known to miscompile kernels ^ arch/arm/kernel/asm-offsets.c:46:2: error: #error and result in filesystem corruption and oopses. #error and result in filesystem corruption and oopses. ^ make[2]: *** [arch/arm/kernel/asm-offsets.s] Error 1 make[1]: *** [prepare0] Error 2 make: *** [sub-make] Error 2 </code></pre> I tried to follow this guide because I wanted to upgrade gcc to a new version : <a href="https://gist.github.com/alexandreelise/192a63e287018ddfc896bbcb70b219d4" class="gmail-_3t5uN8xUmg0TOwRCOGQEcU" rel="noopener nofollow ugc" target="_blank">https://gist.github.com/alexandreelise/192a63e287018ddfc896bbcb70b219d4</a> unfortunately this repo does not work anymore : <pre class="gmail-_3GnarIQX9tD_qsgXkfSDz1"><code class="gmail-_34q3PgLsx9zIU5BiSOjFoM">sudo add-apt-repository ppa:ubuntu-toolchain-r/test Cannot add PPA: 'ppa:ubuntu-toolchain-r/test'. Please check that the PPA name or format is correct. </code></pre></div></div> -- <div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature">Mario. </div></div>