Re: KVM-PR no longer works when compiled with new GCC compilers

John Paul Adrian Glaubitz
2026-04-24T15:48:48Z

On Fri, 2026-04-24 at 16:47 +0200, Christian Zigotzky wrote:
> I compiled it with "mtune=power4" today but without any success.
>
> Error messages:
>
> [  800.274759] Couldn't emulate instruction 0x00000000 (op 0 xop 0)
> [  800.274767] kvmppc_exit_pr_progint: emulation at 100 failed (00000000)

What exactly are you running inside the KVM? 0x00000000 doesn't seem like
a valid instruction and a quick Google research reveals that this triggers
a SIGLL trap.

Adrian

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