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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /tools/testing/selftests/riscv/hwprobe
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/testing/selftests/riscv/hwprobe')
-rw-r--r--tools/testing/selftests/riscv/hwprobe/.gitignore1
-rw-r--r--tools/testing/selftests/riscv/hwprobe/Makefile10
-rw-r--r--tools/testing/selftests/riscv/hwprobe/hwprobe.c90
-rw-r--r--tools/testing/selftests/riscv/hwprobe/sys_hwprobe.S12
4 files changed, 113 insertions, 0 deletions
diff --git a/tools/testing/selftests/riscv/hwprobe/.gitignore b/tools/testing/selftests/riscv/hwprobe/.gitignore
new file mode 100644
index 0000000000..8113dc3bdd
--- /dev/null
+++ b/tools/testing/selftests/riscv/hwprobe/.gitignore
@@ -0,0 +1 @@
+hwprobe
diff --git a/tools/testing/selftests/riscv/hwprobe/Makefile b/tools/testing/selftests/riscv/hwprobe/Makefile
new file mode 100644
index 0000000000..ebdbb3c22e
--- /dev/null
+++ b/tools/testing/selftests/riscv/hwprobe/Makefile
@@ -0,0 +1,10 @@
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2021 ARM Limited
+# Originally tools/testing/arm64/abi/Makefile
+
+TEST_GEN_PROGS := hwprobe
+
+include ../../lib.mk
+
+$(OUTPUT)/hwprobe: hwprobe.c sys_hwprobe.S
+ $(CC) -o$@ $(CFLAGS) $(LDFLAGS) $^
diff --git a/tools/testing/selftests/riscv/hwprobe/hwprobe.c b/tools/testing/selftests/riscv/hwprobe/hwprobe.c
new file mode 100644
index 0000000000..09f290a674
--- /dev/null
+++ b/tools/testing/selftests/riscv/hwprobe/hwprobe.c
@@ -0,0 +1,90 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <stddef.h>
+#include <asm/hwprobe.h>
+
+/*
+ * Rather than relying on having a new enough libc to define this, just do it
+ * ourselves. This way we don't need to be coupled to a new-enough libc to
+ * contain the call.
+ */
+long riscv_hwprobe(struct riscv_hwprobe *pairs, size_t pair_count,
+ size_t cpu_count, unsigned long *cpus, unsigned int flags);
+
+int main(int argc, char **argv)
+{
+ struct riscv_hwprobe pairs[8];
+ unsigned long cpus;
+ long out;
+
+ /* Fake the CPU_SET ops. */
+ cpus = -1;
+
+ /*
+ * Just run a basic test: pass enough pairs to get up to the base
+ * behavior, and then check to make sure it's sane.
+ */
+ for (long i = 0; i < 8; i++)
+ pairs[i].key = i;
+ out = riscv_hwprobe(pairs, 8, 1, &cpus, 0);
+ if (out != 0)
+ return -1;
+ for (long i = 0; i < 4; ++i) {
+ /* Fail if the kernel claims not to recognize a base key. */
+ if ((i < 4) && (pairs[i].key != i))
+ return -2;
+
+ if (pairs[i].key != RISCV_HWPROBE_KEY_BASE_BEHAVIOR)
+ continue;
+
+ if (pairs[i].value & RISCV_HWPROBE_BASE_BEHAVIOR_IMA)
+ continue;
+
+ return -3;
+ }
+
+ /*
+ * This should also work with a NULL CPU set, but should not work
+ * with an improperly supplied CPU set.
+ */
+ out = riscv_hwprobe(pairs, 8, 0, 0, 0);
+ if (out != 0)
+ return -4;
+
+ out = riscv_hwprobe(pairs, 8, 0, &cpus, 0);
+ if (out == 0)
+ return -5;
+
+ out = riscv_hwprobe(pairs, 8, 1, 0, 0);
+ if (out == 0)
+ return -6;
+
+ /*
+ * Check that keys work by providing one that we know exists, and
+ * checking to make sure the resultig pair is what we asked for.
+ */
+ pairs[0].key = RISCV_HWPROBE_KEY_BASE_BEHAVIOR;
+ out = riscv_hwprobe(pairs, 1, 1, &cpus, 0);
+ if (out != 0)
+ return -7;
+ if (pairs[0].key != RISCV_HWPROBE_KEY_BASE_BEHAVIOR)
+ return -8;
+
+ /*
+ * Check that an unknown key gets overwritten with -1,
+ * but doesn't block elements after it.
+ */
+ pairs[0].key = 0x5555;
+ pairs[1].key = 1;
+ pairs[1].value = 0xAAAA;
+ out = riscv_hwprobe(pairs, 2, 0, 0, 0);
+ if (out != 0)
+ return -9;
+
+ if (pairs[0].key != -1)
+ return -10;
+
+ if ((pairs[1].key != 1) || (pairs[1].value == 0xAAAA))
+ return -11;
+
+ return 0;
+}
diff --git a/tools/testing/selftests/riscv/hwprobe/sys_hwprobe.S b/tools/testing/selftests/riscv/hwprobe/sys_hwprobe.S
new file mode 100644
index 0000000000..a4773c88d2
--- /dev/null
+++ b/tools/testing/selftests/riscv/hwprobe/sys_hwprobe.S
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (C) 2023 Rivos, Inc */
+
+.text
+.global riscv_hwprobe
+riscv_hwprobe:
+ # Put __NR_riscv_hwprobe in the syscall number register, then just shim
+ # back the kernel's return. This doesn't do any sort of errno
+ # handling, the caller can deal with it.
+ li a7, 258
+ ecall
+ ret