qemu-riscv64: new device (MR 3571)

Support launching postmarketOS in QEMU on riscv64 architecture. It is
mostly copied from device-qemu-aarch64 with some riscv64-specific
modifications.

Currently UIs using Xorg like Mate, XFCE4 and LXQT work fine, Wayland
UIs like weston, plasma-mobile etc didn't work in my testing.

Also using "pmbootstrap qemu --tablet" is needed to make mouse input
work, the defaults don't seem to work at the moment.

[ci:skip-build]: already built successfully in CI

device/main/device-qemu-riscv64/APKBUILD

@@ -0,0 +1,64 @@
+# Reference: <https://postmarketos.org/devicepkg>
+# Maintainer: Minecrell <minecrell@minecrell.net>
+# Co-Maintainer: Luca Weiss <luca@z3ntu.xyz>
+pkgname=device-qemu-riscv64
+pkgver=1
+pkgrel=0
+pkgdesc="Simulated device in QEMU (riscv64)"
+url="https://postmarketos.org"
+arch="riscv64"
+license="MIT"
+depends="postmarketos-base"
+makedepends="devicepkg-dev"
+subpackages="
+	$pkgname-kernel-edge:kernel_edge
+	$pkgname-mce
+	$pkgname-sway
+	$pkgname-weston
+	"
+
+source="
+	deviceinfo
+	mce-display-blanking.conf
+	weston.ini
+	"
+options="!check !archcheck"
+
+build() {
+	devicepkg_build $startdir $pkgname
+}
+
+package() {
+	devicepkg_package $startdir $pkgname
+}
+
+mce() {
+	pkgdesc="Prevents screen blanking for UI's using mce (Glacier, Asteroid)"
+	install_if="$pkgname=$pkgver-r$pkgrel mce"
+	install -Dm644 "$srcdir"/mce-display-blanking.conf \
+		"$subpkgdir"/etc/mce/50display-blanking.conf
+}
+
+sway() {
+	install_if="$pkgname=$pkgver-r$pkgrel postmarketos-ui-sway"
+	depends="postmarketos-ui-sway-logo-key-alt"
+	mkdir "$subpkgdir"
+}
+
+weston() {
+	install_if="$pkgname=$pkgver-r$pkgrel weston"
+	install -Dm644 "$srcdir"/weston.ini \
+		"$subpkgdir"/etc/xdg/weston/weston.ini
+}
+
+kernel_edge() {
+	pkgdesc="Alpine Edge kernel"
+	depends="linux-edge linux-firmware-none"
+	devicepkg_subpackage_kernel $startdir $pkgname $subpkgname
+}
+
+sha512sums="
+42341299cfd0f301f6dbd626efd115ca5f7d3e9893f45bcb0a3428fedac5f61be97d5c3a0682fb2d38c4ae01d841dcbb2d0eda39670ca31c372a9d5842b97950  deviceinfo
+99d32eed6c5cda59e91516e982c5bd5165ff718133e2411a0dbba04e2057d1dfad49a75e5cc67140d0e0adcbe1383671bd2892335929b782a5b19f5472e635ad  mce-display-blanking.conf
+de794566118f1744d068a94e6a75b61d43f6749a4b0871a5270fa7a2048164d609c71fcffa61845c2a7dd4cb5fbeb72c0e4f8b73b382f36d6ff0bcc9b8a5ae25  weston.ini
+"

device/main/device-qemu-riscv64/deviceinfo

@@ -0,0 +1,23 @@
+# Reference: <https://postmarketos.org/deviceinfo>
+# Please use double quotes only. You can source this file in shell scripts.
+
+deviceinfo_format_version="0"
+deviceinfo_name="QEMU riscv64"
+deviceinfo_manufacturer="QEMU"
+deviceinfo_codename="qemu-riscv64"
+deviceinfo_modules_initfs="virtio_pci virtio_blk virtio-gpu virtio_input evdev"
+deviceinfo_arch="riscv64"
+
+# Device related
+deviceinfo_gpu_accelerated="true"
+deviceinfo_chassis="vm"
+deviceinfo_keyboard="true"
+deviceinfo_external_storage="true"
+deviceinfo_screen_width="1024"
+deviceinfo_screen_height="768"
+deviceinfo_getty="ttyS0;230400"
+
+# Bootloader related
+deviceinfo_flash_method="none"
+deviceinfo_kernel_cmdline="console=tty1 console=ttyS0 PMOS_NO_OUTPUT_REDIRECT PMOS_FORCE_PARTITION_RESIZE"
+deviceinfo_disable_dhcpd="true"

device/main/device-qemu-riscv64/mce-display-blanking.conf

@@ -0,0 +1 @@
+/system/osso/dsm/display/display_never_blank=1

device/main/device-qemu-riscv64/weston.ini

@@ -0,0 +1,5 @@
+[core]
+xwayland=true
+backend=drm-backend.so
+[shell]
+background-image=/usr/share/wallpapers/postmarketos.jpg