tests/functional: Test SPI-SD adapter without SD card connected

SPI-SD adapter should be usable, even without any SD card
wired. Refactor test_riscv64_sifive_u_mmc_spi() to make it
more generic and add another test, inspired by this report:
https://lore.kernel.org/qemu-devel/5b2dc427-f0db-4332-a997-fe0c82415acd@roeck-us.net/

Inspired-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Gustavo Romero <gustavo.romero@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Tested-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20250812140415.70153-3-philmd@linaro.org>

1 files changed, 17 insertions, 5 deletions

diff --git a/tests/functional/test_riscv64_sifive_u.py b/tests/functional/test_riscv64_sifive_u.py
index dc4cb8a4a9..358ff0d1f6 100755
--- a/tests/functional/test_riscv64_sifive_u.py
+++ b/tests/functional/test_riscv64_sifive_u.py
@@ -27,25 +27,37 @@ class SifiveU(LinuxKernelTest):
          'rootfs.ext2.gz'),
         'b6ed95610310b7956f9bf20c4c9c0c05fea647900df441da9dfe767d24e8b28b')
 
-    def test_riscv64_sifive_u_mmc_spi(self):
+    def do_test_riscv64_sifive_u_mmc_spi(self, connect_card):
         self.set_machine('sifive_u')
         kernel_path = self.ASSET_KERNEL.fetch()
         rootfs_path = self.uncompress(self.ASSET_ROOTFS)
 
         self.vm.set_console()
         kernel_command_line = (self.KERNEL_COMMON_COMMAND_LINE +
-                               'root=/dev/mmcblk0 rootwait '
                                'earlycon=sbi console=ttySIF0 '
-                               'panic=-1 noreboot')
+                               'root=/dev/mmcblk0 ')
         self.vm.add_args('-kernel', kernel_path,
-                         '-drive', f'file={rootfs_path},if=sd,format=raw',
                          '-append', kernel_command_line,
                          '-no-reboot')
+        if connect_card:
+            kernel_command_line += 'panic=-1 noreboot rootwait '
+            self.vm.add_args('-drive', f'file={rootfs_path},if=sd,format=raw')
+            pattern = 'Boot successful.'
+        else:
+            kernel_command_line += 'panic=0 noreboot '
+            pattern = 'Cannot open root device "mmcblk0" or unknown-block(0,0)'
+
         self.vm.launch()
-        self.wait_for_console_pattern('Boot successful.')
+        self.wait_for_console_pattern(pattern)
 
         os.remove(rootfs_path)
 
+    def test_riscv64_sifive_u_nommc_spi(self):
+        self.do_test_riscv64_sifive_u_mmc_spi(False)
+
+    def test_riscv64_sifive_u_mmc_spi(self):
+        self.do_test_riscv64_sifive_u_mmc_spi(True)
+
 
 if __name__ == '__main__':
     LinuxKernelTest.main()