Add riscv64 support

Co-authored-by: Sergio Lopez <[email protected]>
Signed-off-by: Xeonacid <[email protected]>

Author: Xeonacid

.github/workflows/cross-build-riscv64.yml

@@ -0,0 +1,17 @@
+name: Cross-build riscv64 kernel
+on: [pull_request, create]
+
+jobs:
+  build:
+    if: github.event_name == 'pull_request'
+    name: Cross-build riscv64 kernel
+    runs-on: ubuntu-latest
+    steps:
+      - name: Code checkout
+        uses: actions/checkout@v2
+
+      - name: Install dependencies
+        run: sudo apt-get install -y make gcc bc bison flex elfutils python3-pyelftools curl patch libelf-dev gcc-riscv64-linux-gnu
+
+      - name: Build riscv64 kernel
+        run: make ARCH=riscv CROSS_COMPILE=riscv64-linux-gnu-

.gitignore

@@ -1,7 +1,7 @@
 __pycache__
 *.pyc
 *~
-libkrunfw.so
+libkrunfw.so*
 kernel.c
 vmlinux
 /tarballs

Makefile

@@ -27,6 +27,10 @@ else ifeq ($(ARCH),arm64)
 	GUESTARCH := aarch64
 	CC := $(CROSS_COMPILE)gcc
 	STRIP := $(CROSS_COMPILE)strip
+else ifeq ($(ARCH),riscv)
+	GUESTARCH := riscv64
+	CC := $(CROSS_COMPILE)gcc
+	STRIP := $(CROSS_COMPILE)strip
 else
 	GUESTARCH := $(ARCH)
 	CC := $(CROSS_COMPILE)gcc
@@ -35,9 +39,11 @@ endif
 
 KBUNDLE_TYPE_x86_64 = vmlinux
 KBUNDLE_TYPE_aarch64 = Image
+KBUNDLE_TYPE_riscv64 = Image
 
 KERNEL_BINARY_x86_64 = $(KERNEL_SOURCES)/vmlinux
 KERNEL_BINARY_aarch64 = $(KERNEL_SOURCES)/arch/arm64/boot/Image
+KERNEL_BINARY_riscv64 = $(KERNEL_SOURCES)/arch/riscv/boot/Image
 
 KRUNFW_BINARY_Linux = libkrunfw$(VARIANT).so.$(FULL_VERSION)
 KRUNFW_SONAME_Linux = libkrunfw$(VARIANT).so.$(ABI_VERSION)