tests/functional: Add RISC-V endianness test
Add functional test for the RISC-V 'big-endian' CPU property. Signed-off-by: Djordje Todorovic <djordje.todorovic@htecgroup.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Pierrick Bouvier <pierrick.bouvier@oss.qualcomm.com> Message-ID: <20260527201348.29511-13-philmd@linaro.org> Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Djordje Todorovic committed
May 27, 2026 at 22:13 UTC
c99fd397854212f7df98f215ab028eb3432b1829
2 files changed
+58
tests/functional/riscv64/meson.build
+1
@@ -11,6 +11,7 @@ tests_riscv64_system_quick = [
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]
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tests_riscv64_system_thorough = [
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+ 'endianness',
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'boston',
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'sifive_u',
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'tuxrun',
tests/functional/riscv64/test_endianness.py
new
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@@ -0,0 +1,57 @@
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+#!/usr/bin/env python3
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+#
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+# Functional tests for RISC-V big-endian support
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+#
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+# Copyright (c) 2026 MIPS
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+#
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+# SPDX-License-Identifier: GPL-2.0-or-later
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+
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+from qemu_test import QemuSystemTest, Asset
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+from qemu_test import wait_for_console_pattern
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+
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+
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+class RiscvBigEndian(QemuSystemTest):
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+ """
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+ Tests for RISC-V runtime big-endian data support.
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+
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+ Uses a bare-metal RV64 ELF that detects data endianness at runtime
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+ by storing a 32-bit word and reading back byte 0. Prints "ENDIAN: BE"
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+ or "ENDIAN: LE" to the NS16550A UART on the virt machine.
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+ """
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+
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+ timeout = 10
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+
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+ ASSET_BE_TEST = Asset(
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+ 'https://github.com/MIPS/linux-test-downloads/raw/main/'
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+ 'riscvbe-baremetal/be-test-bare-metal.elf',
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+ '9ad51b675e101de65908fadbac064ed1d0564c17463715d09dd734db86ea0f58')
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+
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+ def _run_bare_metal(self, big_endian=False):
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+ self.set_machine('virt')
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+ kernel = self.ASSET_BE_TEST.fetch()
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+ self.vm.add_args('-bios', 'none')
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+ self.vm.add_args('-kernel', kernel)
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+ if big_endian:
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+ self.vm.add_args('-cpu', 'rv64,big-endian=on')
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+ self.vm.set_console()
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+ self.vm.launch()
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+ expected = 'ENDIAN: BE' if big_endian else 'ENDIAN: LE'
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+ wait_for_console_pattern(self, expected)
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+
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+ def test_bare_metal_littleendian(self):
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+ """
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+ Boot bare-metal ELF on virt with default little-endian CPU.
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+ Expects "ENDIAN: LE" on UART.
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+ """
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+ self._run_bare_metal(big_endian=False)
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+
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+ def test_bare_metal_bigendian(self):
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+ """
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+ Boot bare-metal ELF on virt with big-endian=on CPU property.
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+ Expects "ENDIAN: BE" on UART.
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+ """
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+ self._run_bare_metal(big_endian=True)
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+
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+
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+if __name__ == '__main__':
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+ QemuSystemTest.main()