On Mon, Jan 29, 2018 at 06:43:38PM -0500, James Lyons wrote: > I’m trying to track down an issue with Qemu-PPC and KVM. > > Likely it’s just some code that needs cleaned up in qemu, but I’m unsure where. > > When I try to boot OS X in qemu-system-ppc with -enable-kvm -cpu host Apple’s BootX hangs at Call Kernel! > > I’m using a PowerBook6,8 with a 7447a v1.5 and Kernel 4.4.111. > > When BootX hangs, I get this in dmesg: > > kvmppc_handle_exit_pr: emulation at 92808 failed ( 7dbafaa6 ) 7dbaffa6 is mfspr r13,1018, and SPR 1018 on the 7447A is L3CR, the level 3 cache control register. The boot code is presumably wanting to do something to the L3 cache configuration. > Can anyone help explain what this error means, so I can figure out what it triggering it, and hopefully fix the issue. You could try adding code to kvmppc_core_emulate_mfspr_pr() and kvmppc_core_emulate_mtspr_pr() to implement it as a dummy SPR that ignores writes and returns zero when read. That should work unless the BootX code does something like waiting for some bit to come back as a 1. Paul. -- To unsubscribe from this list: send the line "unsubscribe kvm-ppc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
