tests/functional/aarch64_virt: add test for FEAT_RME

This boot an OP-TEE environment, and launch a nested guest VM inside it
using the Realms feature.

Signed-off-by: Pierrick Bouvier <[email protected]>

tests/functional/test_aarch64_virt.py

@@ -18,6 +18,7 @@
 from qemu_test import QemuSystemTest, Asset
 from qemu_test import exec_command, wait_for_console_pattern
 from qemu_test import get_qemu_img, run_cmd
+from qemu_test.utils import archive_extract
 
 
 class Aarch64VirtMachine(QemuSystemTest):
@@ -129,6 +130,67 @@ def test_aarch64_virt_gicv2(self):
         return
         self.common_aarch64_virt("virt,gic-version=2")
 
+    # Stack is built with OP-TEE build environment from those instructions:
+    # https://linaro.atlassian.net/wiki/spaces/QEMU/pages/29051027459/
+    # https://github.com/pbo-linaro/qemu-rme-stack
+    ASSET_RME_STACK = Asset(
+        ('https://fileserver.linaro.org/s/JX7oNgfDeGXSxcY/'
+         'download/rme-stack-op-tee-4.2.0.tar.gz'),
+         '1f240f55e8a7a66489c2b7db5d40391e5dcfdd54c82600bd0d4b2145b9a0fbfb')
+
+    # This tests the FEAT_RME cpu implementation, by booting a VM supporting it,
+    # and launching a nested VM using it.
+    def test_aarch64_virt_rme(self):
+        stack_path_tar_gz = self.ASSET_RME_STACK.fetch()
+        archive_extract(stack_path_tar_gz, self.workdir)
+
+        self.set_machine('virt')
+        self.vm.set_console()
+        self.require_accelerator('tcg')
+
+        rme_stack = os.path.join(self.workdir, 'rme-stack')
+        kernel = os.path.join(rme_stack, 'out', 'bin', 'Image')
+        bios = os.path.join(rme_stack, 'out', 'bin', 'flash.bin')
+        drive = os.path.join(rme_stack, 'out-br', 'images', 'rootfs.ext4')
+
+        self.vm.add_args('-accel', 'tcg')
+        self.vm.add_args('-cpu', 'max,x-rme=on')
+        self.vm.add_args('-m', '2048')
+        self.vm.add_args('-M', 'virt,acpi=off,'
+                         'virtualization=on,'
+                         'secure=on,'
+                         'gic-version=3')
+        self.vm.add_args('-bios', bios)
+        self.vm.add_args('-kernel', kernel)
+        self.vm.add_args('-drive', f'format=raw,if=none,file={drive},id=hd0')
+        self.vm.add_args('-device', 'virtio-blk-pci,drive=hd0')
+        self.vm.add_args('-device', 'virtio-9p-device,fsdev=shr0,mount_tag=shr0')
+        self.vm.add_args('-fsdev', f'local,security_model=none,path={rme_stack},id=shr0')
+        self.vm.add_args('-device', 'virtio-net-pci,netdev=net0')
+        self.vm.add_args('-netdev', 'user,id=net0')
+        self.vm.add_args('-append', 'root=/dev/vda')
+
+        self.vm.launch()
+        self.wait_for_console_pattern('Welcome to Buildroot')
+        time.sleep(0.1)
+        exec_command(self, 'root')
+        time.sleep(0.1)
+
+        # We now boot the (nested) guest VM
+        exec_command(self,
+                     'qemu-system-aarch64 -M virt,gic-version=3 '
+                     '-cpu host -enable-kvm -m 512M '
+                     '-M confidential-guest-support=rme0 '
+                     '-object rme-guest,id=rme0,measurement-algo=sha512 '
+                     '-device virtio-net-pci,netdev=net0,romfile= '
+                     '-netdev user,id=net0 '
+                     '-kernel /mnt/out/bin/Image '
+                     '-initrd /mnt/out-br/images/rootfs.cpio '
+                     '-serial stdio')
+        # Detect Realm activation during boot.
+        self.wait_for_console_pattern('SMC_RMI_REALM_ACTIVATE')
+        # Wait for boot to complete.
+        self.wait_for_console_pattern('Welcome to Buildroot')
 
 if __name__ == '__main__':
     QemuSystemTest.main()