Hi Christian, On Thu, 2026-04-23 at 18:50 +0200, Christian Zigotzky wrote: > On 02/10/25 08:37, Christian Zigotzky wrote: > > Hello, > > > > KVM-PR (-enable-kvm) doesn't work anymore on our PA Semi Nemo boards > > [1] if we compiled it with new GCC compilers. > > The VM can't boot. There aren't any messages on the serial console of > > QEMU. > > > > It boots without KVM-PR. > > > > Kernel config with new GCC compiler [2]: > > > > - CONFIG_CC_VERSION_TEXT="powerpc64-suse-linux-gcc (SUSE Linux) 11.5.0" > > - CONFIG_TARGET_CPU="power4" > > - CONFIG_TUNE_CPU="-mtune=power10" > > > > It works if I compile it with an old GCC compiler [3]: > > > > - CONFIG_CC_VERSION_TEXT="powerpc-linux-gnu-gcc (Ubuntu > > 9.4.0-1ubuntu1~20.04.1) 9.4.0" > > - CONFIG_TARGET_CPU="power4" > > - CONFIG_TUNE_CPU="-mtune=power9" > > > > Mtune changes to power9 automatically if I compiled it with an old GCC > > compiler. If I compile it with a new GCC compiler again it changes > > automatically to mtune=power10. > > > > Is mtune the reason of the KVM-PR issue? I think the issue is the new > > GCC. [4] > > > > Could you please check whether KVM-PR is compatible with new versions > > of GCC compilers? > > > > Thanks in advance, > > > > Christian > > > > > > > > [1] https://en.wikipedia.org/wiki/AmigaOne_X1000 > > > > [2] > > https://github.com/chzigotzky/kernels/blob/45186997e6f347fd092f9ab629d62d6041426227/configs/x1000_defconfig > > > > [3] > > https://github.com/chzigotzky/kernels/blob/bc7a3e27b3fcdee52a8135435f02cf807a43872a/configs/x1000_defconfig > > > > [4] KVM-PR no longer works on an X1000 if the kernel has been compiled > > with a new GCC: > > https://forum.hyperion-entertainment.com/viewtopic.php?p=57146#p57146 > > > Error messages (kvm-pr compiled with powerpc64-linux-gnu-gcc 14.1.1 > 20240507 Red Hat Cross 14.1.1-1, GNU ld version 2.41-2.el10_0): > > [ 800.274759] Couldn't emulate instruction 0x00000000 (op 0 xop 0) > [ 800.274767] kvmppc_exit_pr_progint: emulation at 100 failed (00000000)
I don't think "mtune=power9" or "mtune=power10" will work. Did you try "mtune=power4"? Adrian -- .''`. John Paul Adrian Glaubitz : :' : Debian Developer `. `' Physicist `- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
