wireguard: selftests: use microvm on x86

This makes for faster tests, faster compile time, and allows us to ditch
ACPI finally.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: zx2c4

tools/testing/selftests/wireguard/qemu/Makefile

@@ -107,20 +107,22 @@ CHOST := x86_64-linux-musl
 QEMU_ARCH := x86_64
 KERNEL_ARCH := x86_64
 KERNEL_BZIMAGE := $(KERNEL_BUILD_PATH)/arch/x86/boot/bzImage
+QEMU_VPORT_RESULT := virtio-serial-device
 ifeq ($(HOST_ARCH),$(ARCH))
-QEMU_MACHINE := -cpu host -machine q35,accel=kvm
+QEMU_MACHINE := -cpu host -machine microvm,accel=kvm,pit=off,pic=off,rtc=off -no-acpi
 else
-QEMU_MACHINE := -cpu max -machine q35
+QEMU_MACHINE := -cpu max -machine microvm -no-acpi
 endif
 else ifeq ($(ARCH),i686)
 CHOST := i686-linux-musl
 QEMU_ARCH := i386
 KERNEL_ARCH := x86
 KERNEL_BZIMAGE := $(KERNEL_BUILD_PATH)/arch/x86/boot/bzImage
+QEMU_VPORT_RESULT := virtio-serial-device
 ifeq ($(subst x86_64,i686,$(HOST_ARCH)),$(ARCH))
-QEMU_MACHINE := -cpu host -machine q35,accel=kvm
+QEMU_MACHINE := -cpu host -machine microvm,accel=kvm,pit=off,pic=off,rtc=off -no-acpi
 else
-QEMU_MACHINE := -cpu max -machine q35
+QEMU_MACHINE := -cpu coreduo -machine microvm -no-acpi
 endif
 else ifeq ($(ARCH),mips64)
 CHOST := mips64-linux-musl

tools/testing/selftests/wireguard/qemu/arch/i686.config

@@ -1,7 +1,10 @@
-CONFIG_ACPI=y
 CONFIG_SERIAL_8250=y
 CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_VIRTIO_MENU=y
+CONFIG_VIRTIO_MMIO=y
+CONFIG_VIRTIO_CONSOLE=y
+CONFIG_VIRTIO_MMIO_CMDLINE_DEVICES=y
 CONFIG_COMPAT_32BIT_TIME=y
 CONFIG_CMDLINE_BOOL=y
-CONFIG_CMDLINE="console=ttyS0 wg.success=ttyS1 panic_on_warn=1"
+CONFIG_CMDLINE="console=ttyS0 wg.success=vport0p1 panic_on_warn=1 reboot=t"
 CONFIG_FRAME_WARN=1024

tools/testing/selftests/wireguard/qemu/arch/x86_64.config

@@ -1,6 +1,9 @@
-CONFIG_ACPI=y
 CONFIG_SERIAL_8250=y
 CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_VIRTIO_MENU=y
+CONFIG_VIRTIO_MMIO=y
+CONFIG_VIRTIO_CONSOLE=y
+CONFIG_VIRTIO_MMIO_CMDLINE_DEVICES=y
 CONFIG_CMDLINE_BOOL=y
-CONFIG_CMDLINE="console=ttyS0 wg.success=ttyS1 panic_on_warn=1"
+CONFIG_CMDLINE="console=ttyS0 wg.success=vport0p1 panic_on_warn=1 reboot=t"
 CONFIG_FRAME_WARN=1280