Tweak qemu parameters

flake.nix

@@ -98,14 +98,25 @@
 
             runtimeInputs = [ pkgs.qemu_kvm ];
 
-            # -snapshot \
             text = ''
               set -ex
+              state="/tmp/qemu-$USER"
+              mkdir -p "$state"
+              chmod 700 "$state"
               qemu-system-x86_64 \
-                -smp 4 -m 4096 -machine q35,accel=kvm \
-                -bios ${pkgs.OVMF.fd}/FV/OVMF.fd \
+                -cpu host \
+                -machine q35,accel=kvm \
+                -m 4G \
+                -smp 8 \
                 -display none \
-                -serial stdio "$@"
+                -chardev "stdio,id=char0,mux=on,logfile=$state/serial.log,signal=off" \
+                -serial chardev:char0 \
+                -mon chardev=char0 \
+                -drive "if=pflash,format=raw,unit=0,readonly=on,file=${pkgs.OVMF.firmware}" \
+                -drive "if=pflash,format=raw,unit=1,readonly=on,file=${pkgs.OVMF.variables}" \
+                -netdev id=net00,type=user,hostfwd=tcp::2222-:22 \
+                -device virtio-net-pci,netdev=net00 \
+                "$@"
             '';
           };
         };