I have a very simple use case for QEMU that doesn't seem to be possible, despite suggestions in some parts of the documentation that it should be, or am I doing something wrong?
The basic issue is how to get QEMU to provide new processor functionality for the host on the *same* architecture. In other words, add CPU flags in the accelerator that are not supported by the host CPU via emulation. For example, I want to run an application that contains SSE4.1 instructions on a host machine that doesn't have support for these. If I try to do it with QEMUt, I'm just given warnings at startup and it doesn't seem that they have been made available? $ qemu-system-x86_64 -enable-kvm -cpu "host,+ssse3,+sse4.1" -m 256M -smp 1 -boot d -cdrom /home/chris/vmware/iso/TinyCorePure64-15.0.iso -vga qxl -device AC97 qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.01H:ECX.ssse3 [bit 9] qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.01H:ECX.sse4.1 [bit 19] Is there something I can change in that command line to make this work, or why is this impossible? I know emulation is going to be inefficient and slow, but my main concern is getting it to actually work at all!
