Commit 57201d65 authored by Pratik R. Sampat's avatar Pratik R. Sampat Committed by Michael Ellerman
Browse files

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: default avatarPratik R. Sampat <psampat@linux.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220217105321.52941-3-psampat@linux.ibm.com
parent 3c14b734

tools/testing/selftests/powerpc/Makefile

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@@ -30,6 +30,7 @@ SUB_DIRS = alignment \ 
	   eeh			\

	   vphn         \

	   math		\

	   papr_attributes	\

	   ptrace	\

	   security	\

	   mce

tools/testing/selftests/powerpc/papr_attributes/.gitignore

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# SPDX-License-Identifier: GPL-2.0-only

attr_test

tools/testing/selftests/powerpc/papr_attributes/Makefile

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# 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

tools/testing/selftests/powerpc/papr_attributes/attr_test.c

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// 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");

}