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Message-Id: <20220217105321.52941-3-psampat@linux.ibm.com>
Date: Thu, 17 Feb 2022 16:23:21 +0530
From: "Pratik R. Sampat" <psampat@...ux.ibm.com>
To: mpe@...erman.id.au, shuah@...nel.org,
linuxppc-dev@...ts.ozlabs.org, kvm-ppc@...r.kernel.org,
linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org,
psampat@...ux.ibm.com, pratik.r.sampat@...il.com
Subject: [PATCH v9 2/2] selftest/powerpc: Add PAPR sysfs attributes sniff test
Include a testcase to check if the sysfs files for energy and frequency
related have its related attribute files exist and populated
Signed-off-by: Pratik R. Sampat <psampat@...ux.ibm.com>
---
tools/testing/selftests/powerpc/Makefile | 1 +
.../powerpc/papr_attributes/.gitignore | 2 +
.../powerpc/papr_attributes/Makefile | 7 ++
.../powerpc/papr_attributes/attr_test.c | 107 ++++++++++++++++++
4 files changed, 117 insertions(+)
create mode 100644 tools/testing/selftests/powerpc/papr_attributes/.gitignore
create mode 100644 tools/testing/selftests/powerpc/papr_attributes/Makefile
create mode 100644 tools/testing/selftests/powerpc/papr_attributes/attr_test.c
diff --git a/tools/testing/selftests/powerpc/Makefile b/tools/testing/selftests/powerpc/Makefile
index 0830e63818c1..c68c872efb23 100644
--- a/tools/testing/selftests/powerpc/Makefile
+++ b/tools/testing/selftests/powerpc/Makefile
@@ -30,6 +30,7 @@ SUB_DIRS = alignment \
eeh \
vphn \
math \
+ papr_attributes \
ptrace \
security
diff --git a/tools/testing/selftests/powerpc/papr_attributes/.gitignore b/tools/testing/selftests/powerpc/papr_attributes/.gitignore
new file mode 100644
index 000000000000..d5f42b6d9e99
--- /dev/null
+++ b/tools/testing/selftests/powerpc/papr_attributes/.gitignore
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
+attr_test
diff --git a/tools/testing/selftests/powerpc/papr_attributes/Makefile b/tools/testing/selftests/powerpc/papr_attributes/Makefile
new file mode 100644
index 000000000000..e899712d49db
--- /dev/null
+++ b/tools/testing/selftests/powerpc/papr_attributes/Makefile
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0
+TEST_GEN_PROGS := attr_test
+
+top_srcdir = ../../../../..
+include ../../lib.mk
+
+$(TEST_GEN_PROGS): ../harness.c ../utils.c
\ No newline at end of file
diff --git a/tools/testing/selftests/powerpc/papr_attributes/attr_test.c b/tools/testing/selftests/powerpc/papr_attributes/attr_test.c
new file mode 100644
index 000000000000..bab0dc06e90b
--- /dev/null
+++ b/tools/testing/selftests/powerpc/papr_attributes/attr_test.c
@@ -0,0 +1,107 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * PAPR Energy attributes sniff test
+ * This checks if the papr folders and contents are populated relating to
+ * the energy and frequency attributes
+ *
+ * Copyright 2022, Pratik Rajesh Sampat, IBM Corp.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <dirent.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+#include "utils.h"
+
+enum energy_freq_attrs {
+ POWER_PERFORMANCE_MODE = 1,
+ IDLE_POWER_SAVER_STATUS = 2,
+ MIN_FREQ = 3,
+ STAT_FREQ = 4,
+ MAX_FREQ = 6,
+ PROC_FOLDING_STATUS = 8
+};
+
+enum type {
+ INVALID,
+ STR_VAL,
+ NUM_VAL
+};
+
+int value_type(int id)
+{
+ int val_type;
+
+ switch (id) {
+ case POWER_PERFORMANCE_MODE:
+ case IDLE_POWER_SAVER_STATUS:
+ val_type = STR_VAL;
+ break;
+ case MIN_FREQ:
+ case STAT_FREQ:
+ case MAX_FREQ:
+ case PROC_FOLDING_STATUS:
+ val_type = NUM_VAL;
+ break;
+ default:
+ val_type = INVALID;
+ }
+
+ return val_type;
+}
+
+int verify_energy_info(void)
+{
+ const char *path = "/sys/firmware/papr/energy_scale_info";
+ struct dirent *entry;
+ struct stat s;
+ DIR *dirp;
+
+ if (stat(path, &s) || !S_ISDIR(s.st_mode))
+ return -1;
+ dirp = opendir(path);
+
+ while ((entry = readdir(dirp)) != NULL) {
+ char file_name[64];
+ int id, attr_type;
+ FILE *f;
+
+ if (strcmp(entry->d_name, ".") == 0 ||
+ strcmp(entry->d_name, "..") == 0)
+ continue;
+
+ id = atoi(entry->d_name);
+ attr_type = value_type(id);
+ if (attr_type == INVALID)
+ return -1;
+
+ /* Check if the files exist and have data in them */
+ sprintf(file_name, "%s/%d/desc", path, id);
+ f = fopen(file_name, "r");
+ if (!f || fgetc(f) == EOF)
+ return -1;
+
+ sprintf(file_name, "%s/%d/value", path, id);
+ f = fopen(file_name, "r");
+ if (!f || fgetc(f) == EOF)
+ return -1;
+
+ if (attr_type == STR_VAL) {
+ sprintf(file_name, "%s/%d/value_desc", path, id);
+ f = fopen(file_name, "r");
+ if (!f || fgetc(f) == EOF)
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+int main(void)
+{
+ return test_harness(verify_energy_info, "papr_attributes");
+}
--
2.34.1
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