On 3/4/21 5:39 PM, Philippe Mathieu-Daudé wrote: > On 3/3/21 7:54 PM, Richard Henderson wrote: >> On 3/3/21 10:45 AM, Claudio Fontana wrote: >>> It is a bit weird that qemu-system-aarch64 runs with a cortex-a15 >>> model tbh, as cortex-a15 is not capable of aarch64. >> >> No, but qemu-system-aarch64 is capable of 32-bit emulation (because most >> 64-bit cpus retain 32-bit mode). It takes no extra effort to run >> cortex-a15 than it does a cortex-a57. > > IIRC qemu-system-arm starts the aa64 cores in 32-bit mode, while > qemu-system-aarch64 in 64-bit (this gave me trouble because the > kernels for the raspi 64-bit SoCs are in 32-bit mode -- because > the GPU starts them in this mode). > >> I have wondered if we should have just one qemu-system-arm that does it >> all and drop the separate qemu-system-aarch64 -- or vice versa. But >> we've had the separation around so long I'm sure someone would be confused. > > That would be great cleanup IMHO. >
Would we still be able to configure a lean AARCH64-only qemu that only contains the cpu models we want, (via board configuration / KConfig?), for example, a kvm-only build that only has a few 64-bit cpu models in it, plus max/host and removes all the rest? Ciao, CLaudio
