On Sat, May 20, 2017 at 06:06:06PM +0300, Andrei M. wrote: > Hello all, > > I've encountered a problem with running NetBSD 7.1 as guest on > KVM/qemu as experienced previously with 7.0: > > https://mail-index.netbsd.org/netbsd-users/2015/12/31/msg017550.html > > The output is practically the same, even the same values for registers: > > vmt0 at cpu0: Unknown > vmware: open failed, eax=564d5868, ecx=0000001e, edx=00005658 > vmt0: failed to open backdoor RPC channel (TCLO protocol) > > Host machine - Linux Ubuntu 64 bit, qemu-kvm 1:2.5+dfsg-5ubunbtu10.14, > the guest machine (NetBSD 7.1) run through Virtual Machine Manager. > I've tried different memory values, between 512 MB and 1.5 GB (I > wasn't allowed to set more, even though my PC has 4GB), with the same > result. > > The output refers to the following lines in NetBSD/sys/arch/x86/x86/vmt.c: > > 306 vmt_attach (device_t parent, device_t self, void *aux): > ... > 336 if (vm_rpc_open(&sc->sc_tclo_rpc, VM_RPC_OPEN_TCLO) != 0) { > 337 aprint_error_dev(self, "failed to open backdoor RPC channel > (TCLO protocol)\n"); > 338 goto free; > 339 } > > http://bxr.su/NetBSD/sys/arch/x86/x86/vmt.c > > Andrei
You could sync with openbsd vmt. it will fix the 'backdoor RPC channel', but userconf disable vmt will achieve the same - qemu claims to support enough to pass this but does not.
