kselftest/arm64: Add manual encodings for SME instructions

As for the kernel so that we don't have ambitious toolchain requirements
to build the tests manually encode some of the SVE instructions.

Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Shuah Khan <skhan@linuxfoundation.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20220419112247.711548-29-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

diff --git a/tools/testing/selftests/arm64/fp/sme-inst.h b/tools/testing/selftests/arm64/fp/sme-inst.h
new file mode 100644 (file)
index 0000000..7191e53
--- /dev/null
+++ b/tools/testing/selftests/arm64/fp/sme-inst.h
@@ -0,0 +1,51 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// Copyright (C) 2021-2 ARM Limited.
+// Original author: Mark Brown <broonie@kernel.org>
+
+#ifndef SME_INST_H
+#define SME_INST_H
+
+/*
+ * RDSVL X\nx, #\imm
+ */
+.macro rdsvl nx, imm
+       .inst   0x4bf5800                       \
+               | (\imm << 5)                   \
+               | (\nx)
+.endm
+
+.macro smstop
+       msr     S0_3_C4_C6_3, xzr
+.endm
+
+.macro smstart_za
+       msr     S0_3_C4_C5_3, xzr
+.endm
+
+.macro smstart_sm
+       msr     S0_3_C4_C3_3, xzr
+.endm
+
+/*
+ * LDR (vector to ZA array):
+ *     LDR ZA[\nw, #\offset], [X\nxbase, #\offset, MUL VL]
+ */
+.macro _ldr_za nw, nxbase, offset=0
+       .inst   0xe1000000                      \
+               | (((\nw) & 3) << 13)           \
+               | ((\nxbase) << 5)              \
+               | ((\offset) & 7)
+.endm
+
+/*
+ * STR (vector from ZA array):
+ *     STR ZA[\nw, #\offset], [X\nxbase, #\offset, MUL VL]
+ */
+.macro _str_za nw, nxbase, offset=0
+       .inst   0xe1200000                      \
+               | (((\nw) & 3) << 13)           \
+               | ((\nxbase) << 5)              \
+               | ((\offset) & 7)
+.endm
+
+#endif