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

John Paul Adrian Glaubitz <[email protected]> Fri, 24 Apr 2026 17:48:37 +0200

Newsgroups	gmane.linux.ports.ppc.embedded,gmane.comp.emulators.kvm.devel,gmane.linux.debian.ports.powerpc
Message-ID	<d9ad0cd6fa640f23c396778bce2aa322e40e7e88.camel@physik.fu-berlin.de>

On Fri, 2026-04-24 at 16:47 +0200, Christian Zigotzky wrote:
> I compiled it with "mtune=3Dpower4" today but without any success.
>=20
> Error messages:
>=20
> [=C2=A0 800.274759] Couldn't emulate instruction 0x00000000 (op 0 xop 0)
> [=C2=A0 800.274767] kvmppc_exit_pr_progint: emulation at 100 failed (0000=
0000)

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

--=20
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer
`. `'   Physicist
  `-    GPG: 62FF 8A75 84E0 2956 9546  0006 7426 3B37 F5B5 F913