Speed up emulation by using KVM instead of QEMU on x86_64 Linux

Makefile

@@ -6,7 +6,7 @@
 #    By: gbaconni@student.42lausanne.ch             +#+  +:+       +#+         #
 #                                                 +#+#+#+#+#+   +#+            #
 #    Created: 2021/11/02 17:47:57 by gbaconni          #+#    #+#              #
-#    Updated: 2021/11/08 18:38:01 by gbaconni         ###   lausanne.ch        #
+#    Updated: 2021/11/08 19:02:29 by gbaconni         ###   lausanne.ch        #
 #                                                                              #
 # **************************************************************************** #
 
@@ -20,8 +20,16 @@ THREADS = 1
 SOCKETS = 2
 
 KERNEL = $(shell uname -s)
+MACHINE = $(shell uname -m)
 FT = $(shell if test -L ~/goinfre; then echo "yes"; else echo "no"; fi)
 
+QEMU86 = qemu-system-x86_64
+ifeq ($(KERNEL),Linux)
+ifeq ($(MACHINE),x86_64)
+	QEMU86 = kvm
+endif
+endif
+
 all: sync
 
 virtualbox:
@@ -101,7 +109,7 @@ sda: data
 	@test -f data/sda.raw || qemu-img create -q -f raw -o size=$(SSD)M data/sda.raw
 
 amd64: qemu uefi sda debian
-	@qemu-system-x86_64 \
+	@$(QEMU86) \
 	-name debian \
 	-cpu qemu64-v1 \
 	-smp cores=$(CORES),threads=$(THREADS),sockets=$(SOCKETS) \
@@ -127,7 +135,7 @@ amd64: qemu uefi sda debian
 	-rtc base=localtime,clock=host
 
 debug: qemu
-	@qemu-system-x86_64 \
+	@$(QEMU86) \
 	-name debian \
 	-cpu qemu64-v1 \
 	-smp cores=$(CORES),threads=$(THREADS),sockets=$(SOCKETS) \
@@ -198,7 +206,7 @@ endif
 re: clean test
 
 ps:
-	@ps ax | grep qemu | sed 's/ -/ \\\n-/g; s/^[^\/]*//;'
+	@ps ax | grep -e qemu -e kvm | sed 's/ -/ \\\n-/g; s/^[^\/]*//;'
 
 sync: up update
 	@git status | grep -q 'nothing to commit' || (git add -A && git commit -am "$$(date '+%F %T')" && git push) || true