Hi Dennis, On 4/17/20 2:42 AM, Dennis Clarke via wrote:> > Very strange messages from qemu 5.0.0-rc3 wherein I try to run : > > $ /usr/local/bin/qemu-system-ppc64 --version > QEMU emulator version 4.2.93 > Copyright (c) 2003-2020 Fabrice Bellard and the QEMU Project developers > $ > $ > $ /usr/local/bin/qemu-system-ppc64 \ > > -machine pseries-4.1 -cpu power9 -smp 4 -m 12G -accel tcg \ > > -drive file=/home/ppc64/ppc64le.qcow2 \ > > -device virtio-net-pci,netdev=usernet \ > > -netdev user,id=usernet,hostfwd=tcp::10000-:22 \ > > -serial stdio -display none -vga none > qemu-system-ppc64: warning: TCG doesn't support requested feature, > cap-cfpc=workaround > qemu-system-ppc64: warning: TCG doesn't support requested feature, > cap-sbbc=workaround > qemu-system-ppc64: warning: TCG doesn't support requested feature, > cap-ibs=workaround[...]> Quiescing Open Firmware ... > Booting Linux via __start() @ 0x0000000002000000 ... > Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries [...]
Thanks for this report. I purposed a patch to fix this, but don't expect it to be fixed in the next 5.0 release because this is not a critical security bug. > From this point onwards I see an endless stream of : > > Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries > Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries > Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries > Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries > Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries > Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries [...] > > No idea what that is .. but it doesn't look friendly. > > Also I did compile qemu with --enable-debug --disable-strip and the > performance is truely horrific. I can only assume that those options > are the cause. Any thoughts from anyone would be wonderful. --enable-debug enables --enable-debug-tcg which is not designed for performance. You might want to try '--enable-debug --disable-debug-tcg'.