From: Vacha Bhavsar <vacha.bhavsar@oss.qualcomm.com>
This patch adds a test case to test SME register exposure to
a remote gdb debugging session. This test simply sets and
reads SME registers.
Signed-off-by: Vacha Bhavsar <vacha.bhavsar@oss.qualcomm.com>
Message-id: 20250909161012.2561593-4-vacha.bhavsar@oss.qualcomm.com
[PMM: fixed various python formatting nits]
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
configure | 6 ++
tests/tcg/aarch64/Makefile.target | 29 +++++++
tests/tcg/aarch64/gdbstub/test-sme.py | 117 ++++++++++++++++++++++++++
3 files changed, 152 insertions(+)
create mode 100644 tests/tcg/aarch64/gdbstub/test-sme.py
diff --git a/configure b/configure
index 274a7787642..9aea02cf6a2 100755
--- a/configure
+++ b/configure
@@ -1839,6 +1839,12 @@ for target in $target_list; do
echo "GDB=$gdb_bin" >> $config_target_mak
fi
+ if test "${gdb_arches#*$arch}" != "$gdb_arches" && version_ge $gdb_version 14.1; then
+ echo "GDB_HAS_SME_TILES=y" >> $config_target_mak
+ else
+ echo "GDB_HAS_SME_TILES=n" >> $config_target_mak
+ fi
+
if test "${gdb_arches#*aarch64}" != "$gdb_arches" && version_ge $gdb_version 15.1; then
echo "GDB_HAS_MTE=y" >> $config_target_mak
fi
diff --git a/tests/tcg/aarch64/Makefile.target b/tests/tcg/aarch64/Makefile.target
index 16ddcf4f883..1755874beed 100644
--- a/tests/tcg/aarch64/Makefile.target
+++ b/tests/tcg/aarch64/Makefile.target
@@ -134,6 +134,35 @@ run-gdbstub-sve-ioctls: sve-ioctls
EXTRA_RUNS += run-gdbstub-sysregs run-gdbstub-sve-ioctls
+ifneq ($(CROSS_AS_HAS_ARMV9_SME),)
+# SME gdbstub tests
+
+run-gdbstub-sysregs-sme: sysregs
+ $(call run-test, $@, $(GDB_SCRIPT) \
+ --gdb $(GDB) \
+ --qemu $(QEMU) --qargs "$(QEMU_OPTS)" \
+ --bin $< --test $(AARCH64_SRC)/gdbstub/test-sme.py \
+ -- test_sme --gdb_basic_za_test, \
+ basic gdbstub SME support)
+
+ifeq ($(GDB_HAS_SME_TILES),y)
+run-gdbstub-sysregs-sme-tile-slice: sysregs
+ $(call run-test, $@, $(GDB_SCRIPT) \
+ --gdb $(GDB) \
+ --qemu $(QEMU) --qargs "$(QEMU_OPTS)" \
+ --bin $< --test $(AARCH64_SRC)/gdbstub/test-sme.py \
+ -- test_sme --gdb_tile_slice_test, \
+ gdbstub SME ZA tile slice support)
+else
+run-gdbstub-sysregs-sme-tile-slice: sysregs
+ $(call skip-test,"gdbstub SME ZA tile slice support", \
+ "selected gdb ($(GDB)) does not support SME ZA tile slices")
+endif
+
+EXTRA_RUNS += run-gdbstub-sysregs-sme run-gdbstub-sysregs-sme-tile-slice
+
+endif
+
ifeq ($(GDB_HAS_MTE),y)
run-gdbstub-mte: mte-8
$(call run-test, $@, $(GDB_SCRIPT) \
diff --git a/tests/tcg/aarch64/gdbstub/test-sme.py b/tests/tcg/aarch64/gdbstub/test-sme.py
new file mode 100644
index 00000000000..ec031896427
--- /dev/null
+++ b/tests/tcg/aarch64/gdbstub/test-sme.py
@@ -0,0 +1,117 @@
+#
+# Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+#
+# Test the SME registers are visible and changeable via gdbstub
+#
+# This is launched via tests/guest-debug/run-test.py
+#
+
+import argparse
+import gdb
+from test_gdbstub import main, report
+
+MAGIC = 0x01020304
+BASIC_ZA_TEST = 0
+TILE_SLICE_TEST = 0
+
+
+def run_test():
+ """Run the requested test(s) for SME ZA gdbstub support"""
+
+ if BASIC_ZA_TEST:
+ run_basic_sme_za_gdbstub_support_test()
+ if TILE_SLICE_TEST:
+ run_basic_sme_za_tile_slice_gdbstub_support_test()
+
+
+def run_basic_sme_za_gdbstub_support_test():
+ """Test reads and writes to the SME ZA register at the byte level"""
+
+ frame = gdb.selected_frame()
+ rname = "za"
+ za = frame.read_register(rname)
+ report(True, "Reading %s" % rname)
+
+ # Writing to the ZA register, byte by byte.
+ for i in range(0, 16):
+ for j in range(0, 16):
+ cmd = "set $za[%d][%d] = 0x01" % (i, j)
+ gdb.execute(cmd)
+ report(True, "%s" % cmd)
+
+ # Reading from the ZA register, byte by byte.
+ for i in range(0, 16):
+ for j in range(0, 16):
+ reg = "$za[%d][%d]" % (i, j)
+ v = gdb.parse_and_eval(reg)
+ report(str(v.type) == "uint8_t", "size of %s" % (reg))
+ report(v == 0x1, "%s is 0x%x" % (reg, 0x1))
+
+
+def run_basic_sme_za_tile_slice_gdbstub_support_test():
+ """Test reads and writes of SME ZA horizontal and vertical tile slices
+
+ Test if SME ZA tile slices, both horizontal and vertical,
+ can be correctly read and written to. The sizes to test
+ are quadwords and doublewords.
+ """
+
+ sizes = {}
+ sizes["q"] = "uint128_t"
+ sizes["d"] = "uint64_t"
+
+ # Accessing requested sizes of elements of ZA
+ for size in sizes:
+
+ # Accessing various ZA tiles
+ for i in range(0, 4):
+
+ # Accessing various horizontal slices for each ZA tile
+ for j in range(0, 4):
+ # Writing to various elements in each tile slice
+ for k in range(0, 4):
+ cmd = "set $za%dh%c%d[%d] = 0x%x" % (i, size, j, k, MAGIC)
+ gdb.execute(cmd)
+ report(True, "%s" % cmd)
+
+ # Reading from the written elements in each tile slice
+ for k in range(0, 4):
+ reg = "$za%dh%c%d[%d]" % (i, size, j, k)
+ v = gdb.parse_and_eval(reg)
+ report(str(v.type) == sizes[size], "size of %s" % (reg))
+ report(v == MAGIC, "%s is 0x%x" % (reg, MAGIC))
+
+ # Accessing various vertical slices for each ZA tile
+ for j in range(0, 4):
+ # Writing to various elements in each tile slice
+ for k in range(0, 4):
+ cmd = "set $za%dv%c%d[%d] = 0x%x" % (i, size, j, k, MAGIC)
+ gdb.execute(cmd)
+ report(True, "%s" % cmd)
+
+ # Reading from the written elements in each tile slice
+ for k in range(0, 4):
+ reg = "$za%dv%c%d[%d]" % (i, size, j, k)
+ v = gdb.parse_and_eval(reg)
+ report(str(v.type) == sizes[size], "size of %s" % (reg))
+ report(v == MAGIC, "%s is 0x%x" % (reg, MAGIC))
+
+
+parser = argparse.ArgumentParser(description="A gdbstub test for SME support")
+parser.add_argument("--gdb_basic_za_test",
+ help="Enable test for basic SME ZA support",
+ action="store_true")
+parser.add_argument("--gdb_tile_slice_test",
+ help="Enable test for ZA tile slice support",
+ action="store_true")
+args = parser.parse_args()
+
+if args.gdb_basic_za_test:
+ BASIC_ZA_TEST = 1
+if args.gdb_tile_slice_test:
+ TILE_SLICE_TEST = 1
+
+main(run_test, expected_arch="aarch64")
--
2.43.0