[2/2] fwts/opal: Reserved memory DT validation tests.

Properties:
    reserved-names
    reserved-ranges

Nodes:
    reserved-memory/
                   |sub-regions at unitaddress
                   |sub-regions at unitaddress

And also this testcase validates different fixed region sizes
like occ-common-area, homer etc.

These image sizes can be vary for different platforms. So
in order to validate this additional check user need to
provide a platform config file in below path.

/usr/local/share/fwts/platform.conf

The contents of file should be key=value for different image sizes

cat /usr/local/share/fwts/platform.conf
occ-common-area=800000
homer-image=400000
slw-image=100000

If user won't provide this config file, this additional validation checks
can be skipped.

Signed-off-by: Pridhiviraj Paidipeddi <ppaidipe@linux.vnet.ibm.com>
---
 src/Makefile.am       |   1 +
 src/opal/reserv_mem.c | 301 ++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 302 insertions(+)
 create mode 100644 src/opal/reserv_mem.c

On 21/04/17 06:16, Pridhiviraj Paidipeddi wrote:
> Properties:
>     reserved-names
>     reserved-ranges
> 
> Nodes:
>     reserved-memory/
>                    |sub-regions at unitaddress
>                    |sub-regions at unitaddress
> 
> And also this testcase validates different fixed region sizes
> like occ-common-area, homer etc.
> 
> These image sizes can be vary for different platforms. So
> in order to validate this additional check user need to
> provide a platform config file in below path.
> 
> /usr/local/share/fwts/platform.conf
> 
> The contents of file should be key=value for different image sizes
> 
> cat /usr/local/share/fwts/platform.conf
> occ-common-area=800000
> homer-image=400000
> slw-image=100000
> 
> If user won't provide this config file, this additional validation checks
> can be skipped.
> 
> Signed-off-by: Pridhiviraj Paidipeddi <ppaidipe@linux.vnet.ibm.com>
> ---
>  src/Makefile.am       |   1 +
>  src/opal/reserv_mem.c | 301 ++++++++++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 302 insertions(+)
>  create mode 100644 src/opal/reserv_mem.c
> 
> diff --git a/src/Makefile.am b/src/Makefile.am
> index 4cf6201..c43503e 100644
> --- a/src/Makefile.am
> +++ b/src/Makefile.am
> @@ -148,6 +148,7 @@ fwts_SOURCES = main.c 				\
>  	opal/mtd_info.c				\
>  	opal/prd_info.c				\
>          opal/power_mgmt_info.c                  \
> +        opal/reserv_mem.c                       \

please use tabs instead of white spaces. thanks!

>  	pci/aspm/aspm.c 			\
>  	pci/crs/crs.c 				\
>  	pci/maxreadreq/maxreadreq.c 		\
> diff --git a/src/opal/reserv_mem.c b/src/opal/reserv_mem.c
> new file mode 100644
> index 0000000..7e38cce
> --- /dev/null
> +++ b/src/opal/reserv_mem.c
> @@ -0,0 +1,301 @@
> +/*
> + * Copyright (C) 2010-2017 Canonical
> + * Some of this work - Copyright (C) 2016-2017 IBM
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License
> + * as published by the Free Software Foundation; either version 2
> + * of the License, or (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
> + *
> + */
> +
> +#include <fcntl.h>
> +#include <stdlib.h>
> +#include <sys/ioctl.h>
> +
> +#include "fwts.h"
> +
> +#ifdef HAVE_LIBFDT
> +#include <libfdt.h>
> +#endif
> +
> +#define FILENAME "/usr/local/share/fwts/platform.conf"

FILENAME is a bit generic, how about CONFIG_FILENAME or something like that?

> +#define MAXBUF 1024
> +#define DELIM "="
> +
> +static const char *root_node = "/";
> +
> +static const char *reserv_mem_node = "/reserved-memory/";
> +
> +struct reserv_region {
> +    const char *name;
> +    uint64_t start;
> +    uint64_t len;
> +};

again, I'd prefer the fwts coding style in making these typedefs, e.g.

typedef struct {
	const char *name;
	uint64_t start;
	uint64_t len;
} reserv_region_t;

and is there any reason to call it reserv_region_t; would
reserve_region_t be more readable?

and also please use tabs for indentation :-)

> +
> +/* Update new image names here */
> +
> +struct config
> +{
> +   uint64_t occ_common;
> +   uint64_t homer;
> +   uint64_t slw;
> +};
> +
> +bool skip = false;

could skip be made static?

> +
> +struct config get_config(fwts_framework *fw, char *filename)
> +{
> +    struct config configstruct;
> +    FILE *file = fopen(filename, "r");
> +    char *p;
> +    uint64_t value;

tabs instead of spaces for indentation please.

I'd prefer:

	FILE *file;

	...
	...

	file = fopen(filename, "r");
	if (!file) {

> +
> +    if (file != NULL)
> +    {
> +        char line[MAXBUF];
> +        int i = 0;

When it comes to if/while statements etc, can you use the fwts coding style:

	if ( ... ) {
		...
	} else {
		...
	}

	while ( ... ) {
	}

rather than

	if ( ... )
		...
	{
	}
	else {
		...
	}

amd

	while ( ... )
	{
	}

> +
> +        while(fgets(line, sizeof(line), file) != NULL)
> +        {
> +            char *cfline;
> +
> +            cfline = strstr((char *)line,DELIM);
> +            cfline = cfline + strlen(DELIM);
> +            value = strtoul(cfline, &p, 16);
> +
> +            if (strstr(line, "homer")) {
> +                configstruct.homer = value;
> +            }
> +            else if (strstr(line, "occ-common-area")) {
> +                configstruct.occ_common = value;
> +            }
> +            else if (strstr(line, "slw-image")) {
> +                configstruct.slw = value;
> +            }
> +
> +            i++;
> +        }
> +        fclose(file);
> +    }
> +    else {
> +        skip = true;
> +        fwts_log_error(fw, "Platform config file doesn't exist,"
> +                           "skipping region size validation check");
> +    }
> +
> +    return configstruct;

Static analysis reported the following issue:

CID 1374474 (#1-3 of 3): Uninitialized scalar variable (UNINIT)18.
uninit_use: Using uninitialized value configstruct. Field
configstruct.slw is uninitialized.

> +}
> +
> +static char *make_message(const char *fmt, ...) {
> +    char *p = NULL;
> +    size_t size = 128;

can size be const?

> +    va_list ap;
> +
> +    if((p = malloc(size)) == NULL)
> +        return NULL;

I'd prefer:
	p = malloc(size);
	if (!p)
		return NULL;

> +
> +    va_start(ap, fmt);
> +    vsnprintf(p, size, fmt, ap);
> +    va_end(ap);
> +    return p;
> +}
> +
> +static int reserv_mem_init(fwts_framework *fw)
> +{
> +    if (fwts_firmware_detect() != FWTS_FIRMWARE_OPAL) {
> +        fwts_skipped(fw,
> +	    "The firmware type detected was non OPAL"
> +            "so skipping the OPAL Reserve Memory DT checks.");
> +        return FWTS_SKIP;
> +    }
> +
> +    /* On an OPAL based system Device tree should be present */
> +    if (!fw->fdt) {
> +        fwts_failed(fw, LOG_LEVEL_HIGH, "NoDeviceTree",
> +                    "Device tree not found");
> +        return FWTS_ERROR;
> +    }
> +
> +    return FWTS_OK;
> +}
> +
> +static int reserv_mem_limits_test(fwts_framework *fw)
> +{
> +    bool ok = true;
> +    char *region_names;
> +    const uint64_t *ranges;
> +    struct reserv_region *regions;
> +    int  offset, len, nr_regions;
> +    struct config configstruct;
> +
> +    configstruct = get_config(fw, FILENAME);

returning an entire data structure and assigning it like this is a bit
sub-optimal. I'd prefer to pass it by reference and perhaps have a
sanity check:

	if (get_config(fw, FILENAME, &configstruct) != FWTS_OK) {
		/* do some error handling */
	}


> +
> +    offset = fdt_path_offset(fw->fdt, root_node);
> +    if (offset < 0) {
> +        fwts_failed(fw, LOG_LEVEL_MEDIUM, "DTNodeMissing",
> +            "DT root node %s is missing", root_node);
> +        return FWTS_ERROR;
> +    }
> +
> +    /* Get the number of memory reserved regions */
> +    nr_regions = fwts_dt_stringlist_count(fw, fw->fdt, offset,
> +                         "reserved-names");
> +
> +    /* Check for the reservd-names property */
> +    region_names = (char *)fdt_getprop(fw->fdt, offset,
> +                                   "reserved-names", &len);
> +    if (!region_names) {
> +        fwts_failed(fw, LOG_LEVEL_MEDIUM, "DTPropertyMissing",
> +            "DT Property reserved-names is missing %s", fdt_strerror(len));
> +        return FWTS_ERROR;
> +    }
> +
> +    regions = malloc(nr_regions*sizeof(struct reserv_region));
> +    if(!regions) {

spacing between if and ( please.

	if (!regions) {

> +        fwts_skipped(fw,
> +            "Unable to allocate memory for reserv_region structure");
> +        return FWTS_SKIP;
> +    }
> +
> +    for(int i = 0; i < nr_regions; i++) {

spacing:

	for (int i = 0; i < nr_regions; i++) {

> +        regions[i].name = strdup(region_names);
> +        region_names += strlen(regions[i].name)+1;
> +    }
> +
> +    /* Check for the reserved-ranges property */
> +    ranges = fdt_getprop(fw->fdt, offset, "reserved-ranges", &len);
> +    if (ranges == NULL) {
> +        fwts_failed(fw, LOG_LEVEL_MEDIUM, "DTPropertyMissing",
> +            "DT Property reserved-ranges is missing %s", fdt_strerror(len));
> +        return FWTS_ERROR;
> +    }
> +
> +
> +    for(int j=0; j < nr_regions; j++) {

spacing for (

> +        regions[j].start = (uint64_t )be64toh(ranges[2*j]);
> +        regions[j].len = (uint64_t )be64toh(ranges[2*j+1]);
> +        fwts_log_info(fw,"Region name %80s"
> +                         " start: 0x%08lx, len: 0x%08lx\n",
> +             regions[j].name, regions[j].start, regions[j].len);
> +    }
> +
> +    offset = fdt_path_offset(fw->fdt, reserv_mem_node);
> +    if (offset < 0) {
> +        fwts_failed(fw, LOG_LEVEL_MEDIUM, "DTNodeMissing",
> +            "reserve memory node %s is missing", reserv_mem_node);
> +        return FWTS_ERROR;
> +    }
> +
> +    /* Validate different cases */
> +    for(int j=0; j < nr_regions; j++) {

spacing for (

> +
> +        char *buf=NULL;

spacing:
		char *buf = NULL;
> +
> +        /* Check for zero offset's */
> +        if (regions[j].start == 0) {
> +            fwts_failed(fw, LOG_LEVEL_MEDIUM, "ZeroStartAddress",
> +            "memory region got zero start address");
> +            ok = false;
> +        }
> +
> +        /* Check for zero region sizes */
> +        if (regions[j].len == 0) {
> +            fwts_failed(fw, LOG_LEVEL_MEDIUM, "ZeroRegionSize",
> +            "memory region got zero size");
> +            ok = false;
> +        }
> +
> +        /* Check corresponding memory region got reserved by looking
> +            reserved-memory node entries */
> +
> +        /* Form the reserved-memory sub nodes for all the regions*/
> +        if (!strstr(regions[j].name, "@"))
> +            buf = make_message("%s%s@%lx", reserv_mem_node, regions[j].name,
> +                             regions[j].start);
> +        else
> +            buf = make_message("/%s/%s", reserv_mem_node, regions[j].name);
> +
> +        if(buf ==NULL) {

spacing
		if (buf == NULL) {

actually, it is preferable to do:

		if (!buf) {

..there are quite a few of these throughout the code.

> +            fwts_skipped(fw, "Unable to allocate memory for message buffer");
> +            return FWTS_SKIP;
> +        }
> +
> +        offset = fdt_path_offset(fw->fdt, buf);
> +        if (offset < 0) {
> +            fwts_failed(fw, LOG_LEVEL_MEDIUM, "DTNodeMissing",
> +                "reserve memory region node %s is missing", buf);
> +            ok = false;
> +        }
> +
> +        if (skip)
> +           continue;
> +
> +        /* Validate different Known image fixed sizes here */
> +        if (strstr(regions[j].name, "homer-image")) {
> +            if(regions[j].len != configstruct.homer) {

spacing: if (regesions[j].len...

> +                fwts_failed(fw, LOG_LEVEL_MEDIUM, "ImageSizeMismatch",
> +                "Mismatch in homer-image size, expected: 0x%lx, actual: 0x%lx",
> +                        configstruct.homer, regions[j].len);
> +            ok = false;

indentation of ok is out by 1 level

> +            }
> +            else
> +                fwts_log_info(fw, "homer-image size is validated");
> +        }
> +
> +        if (strstr(regions[j].name, "slw-image")) {
> +            if(regions[j].len != configstruct.slw) {
> +                fwts_failed(fw, LOG_LEVEL_MEDIUM, "ImageSizeMismatch",
> +                "Mismatch in slw-image size, expected: 0x%lx, actual: 0x%lx",
> +                        configstruct.slw, regions[j].len);
> +            ok = false;


indentation of ok is out by 1 level

> +            }
> +            else
> +                fwts_log_info(fw, "slw-image size is validated");
> +        }
> +
> +        if (strstr(regions[j].name, "occ-common-area")) {
> +            if(regions[j].len != configstruct.occ_common) {
> +                fwts_failed(fw, LOG_LEVEL_MEDIUM, "ImageSizeMismatch",
> +                "Mismatch in occ-common-area size,"
> +                "expected: 0x%lx, actual: 0x%lx",
> +                        configstruct.occ_common, regions[j].len);
> +            ok = false;


indentation of ok is out by 1 level

> +            }
> +            else
> +                fwts_log_info(fw, "occ-common-area size is validated");
> +        }
> +    }
> +
> +    if (ok)
> +        fwts_passed(fw, "Reserved memory validation tests passed");
> +    else
> +        fwts_failed(fw, LOG_LEVEL_HIGH, "ReservMemTestFail",
> +                "One or few Reserved Memory DT validation tests failed");
> +    free(regions);
> +    return FWTS_OK;
> +}
> +
> +static fwts_framework_minor_test reserv_mem_tests[] = {
> +    { reserv_mem_limits_test, "OPAL Reserved memory DT Validation Info" },
> +    { NULL, NULL }
> +};
> +
> +static fwts_framework_ops reserv_mem_tests_ops = {
> +    .description = "OPAL Reserved memory DT Validation Test",
> +    .init        = reserv_mem_init,
> +    .minor_tests = reserv_mem_tests
> +};
> +
> +FWTS_REGISTER_FEATURES("reserv_mem", &reserv_mem_tests_ops, FWTS_TEST_EARLY,
> +		FWTS_FLAG_BATCH | FWTS_FLAG_ROOT_PRIV,
> +		FWTS_FW_FEATURE_DEVICETREE)
>

Forgot to note there are some memory leaks too (see below)

On 21/04/17 06:16, Pridhiviraj Paidipeddi wrote:
> Properties:
>     reserved-names
>     reserved-ranges
> 
> Nodes:
>     reserved-memory/
>                    |sub-regions at unitaddress
>                    |sub-regions at unitaddress
> 
> And also this testcase validates different fixed region sizes
> like occ-common-area, homer etc.
> 
> These image sizes can be vary for different platforms. So
> in order to validate this additional check user need to
> provide a platform config file in below path.
> 
> /usr/local/share/fwts/platform.conf
> 
> The contents of file should be key=value for different image sizes
> 
> cat /usr/local/share/fwts/platform.conf
> occ-common-area=800000
> homer-image=400000
> slw-image=100000
> 
> If user won't provide this config file, this additional validation checks
> can be skipped.
> 
> Signed-off-by: Pridhiviraj Paidipeddi <ppaidipe@linux.vnet.ibm.com>
> ---
>  src/Makefile.am       |   1 +
>  src/opal/reserv_mem.c | 301 ++++++++++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 302 insertions(+)
>  create mode 100644 src/opal/reserv_mem.c
> 
> diff --git a/src/Makefile.am b/src/Makefile.am
> index 4cf6201..c43503e 100644
> --- a/src/Makefile.am
> +++ b/src/Makefile.am
> @@ -148,6 +148,7 @@ fwts_SOURCES = main.c 				\
>  	opal/mtd_info.c				\
>  	opal/prd_info.c				\
>          opal/power_mgmt_info.c                  \
> +        opal/reserv_mem.c                       \
>  	pci/aspm/aspm.c 			\
>  	pci/crs/crs.c 				\
>  	pci/maxreadreq/maxreadreq.c 		\
> diff --git a/src/opal/reserv_mem.c b/src/opal/reserv_mem.c
> new file mode 100644
> index 0000000..7e38cce
> --- /dev/null
> +++ b/src/opal/reserv_mem.c
> @@ -0,0 +1,301 @@
> +/*
> + * Copyright (C) 2010-2017 Canonical
> + * Some of this work - Copyright (C) 2016-2017 IBM
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License
> + * as published by the Free Software Foundation; either version 2
> + * of the License, or (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
> + *
> + */
> +
> +#include <fcntl.h>
> +#include <stdlib.h>
> +#include <sys/ioctl.h>
> +
> +#include "fwts.h"
> +
> +#ifdef HAVE_LIBFDT
> +#include <libfdt.h>
> +#endif
> +
> +#define FILENAME "/usr/local/share/fwts/platform.conf"
> +#define MAXBUF 1024
> +#define DELIM "="
> +
> +static const char *root_node = "/";
> +
> +static const char *reserv_mem_node = "/reserved-memory/";
> +
> +struct reserv_region {
> +    const char *name;
> +    uint64_t start;
> +    uint64_t len;
> +};
> +
> +/* Update new image names here */
> +
> +struct config
> +{
> +   uint64_t occ_common;
> +   uint64_t homer;
> +   uint64_t slw;
> +};
> +
> +bool skip = false;
> +
> +struct config get_config(fwts_framework *fw, char *filename)
> +{
> +    struct config configstruct;
> +    FILE *file = fopen(filename, "r");
> +    char *p;
> +    uint64_t value;
> +
> +    if (file != NULL)
> +    {
> +        char line[MAXBUF];
> +        int i = 0;
> +
> +        while(fgets(line, sizeof(line), file) != NULL)
> +        {
> +            char *cfline;
> +
> +            cfline = strstr((char *)line,DELIM);
> +            cfline = cfline + strlen(DELIM);
> +            value = strtoul(cfline, &p, 16);
> +
> +            if (strstr(line, "homer")) {
> +                configstruct.homer = value;
> +            }
> +            else if (strstr(line, "occ-common-area")) {
> +                configstruct.occ_common = value;
> +            }
> +            else if (strstr(line, "slw-image")) {
> +                configstruct.slw = value;
> +            }
> +
> +            i++;
> +        }
> +        fclose(file);
> +    }
> +    else {
> +        skip = true;
> +        fwts_log_error(fw, "Platform config file doesn't exist,"
> +                           "skipping region size validation check");
> +    }
> +
> +    return configstruct;
> +}
> +
> +static char *make_message(const char *fmt, ...) {
> +    char *p = NULL;
> +    size_t size = 128;
> +    va_list ap;
> +
> +    if((p = malloc(size)) == NULL)
> +        return NULL;
> +
> +    va_start(ap, fmt);
> +    vsnprintf(p, size, fmt, ap);
> +    va_end(ap);
> +    return p;
> +}
> +
> +static int reserv_mem_init(fwts_framework *fw)
> +{
> +    if (fwts_firmware_detect() != FWTS_FIRMWARE_OPAL) {
> +        fwts_skipped(fw,
> +	    "The firmware type detected was non OPAL"
> +            "so skipping the OPAL Reserve Memory DT checks.");
> +        return FWTS_SKIP;
> +    }
> +
> +    /* On an OPAL based system Device tree should be present */
> +    if (!fw->fdt) {
> +        fwts_failed(fw, LOG_LEVEL_HIGH, "NoDeviceTree",
> +                    "Device tree not found");
> +        return FWTS_ERROR;
> +    }
> +
> +    return FWTS_OK;
> +}
> +
> +static int reserv_mem_limits_test(fwts_framework *fw)
> +{
> +    bool ok = true;
> +    char *region_names;
> +    const uint64_t *ranges;
> +    struct reserv_region *regions;
> +    int  offset, len, nr_regions;
> +    struct config configstruct;
> +
> +    configstruct = get_config(fw, FILENAME);
> +
> +    offset = fdt_path_offset(fw->fdt, root_node);
> +    if (offset < 0) {
> +        fwts_failed(fw, LOG_LEVEL_MEDIUM, "DTNodeMissing",
> +            "DT root node %s is missing", root_node);
> +        return FWTS_ERROR;
> +    }
> +
> +    /* Get the number of memory reserved regions */
> +    nr_regions = fwts_dt_stringlist_count(fw, fw->fdt, offset,
> +                         "reserved-names");
> +
> +    /* Check for the reservd-names property */
> +    region_names = (char *)fdt_getprop(fw->fdt, offset,
> +                                   "reserved-names", &len);
> +    if (!region_names) {
> +        fwts_failed(fw, LOG_LEVEL_MEDIUM, "DTPropertyMissing",
> +            "DT Property reserved-names is missing %s", fdt_strerror(len));
> +        return FWTS_ERROR;
> +    }
> +
> +    regions = malloc(nr_regions*sizeof(struct reserv_region));
> +    if(!regions) {
> +        fwts_skipped(fw,
> +            "Unable to allocate memory for reserv_region structure");
> +        return FWTS_SKIP;
> +    }
> +
> +    for(int i = 0; i < nr_regions; i++) {
> +        regions[i].name = strdup(region_names);
> +        region_names += strlen(regions[i].name)+1;
> +    }
> +
> +    /* Check for the reserved-ranges property */
> +    ranges = fdt_getprop(fw->fdt, offset, "reserved-ranges", &len);
> +    if (ranges == NULL) {
> +        fwts_failed(fw, LOG_LEVEL_MEDIUM, "DTPropertyMissing",
> +            "DT Property reserved-ranges is missing %s", fdt_strerror(len));
> +        return FWTS_ERROR;

Static analysis reports:

CID 1374472 (#1 of 2): Resource leak (RESOURCE_LEAK)
leaked_storage: Variable regions going out of scope leaks the storage it
points to


> +    }
> +
> +
> +    for(int j=0; j < nr_regions; j++) {
> +        regions[j].start = (uint64_t )be64toh(ranges[2*j]);
> +        regions[j].len = (uint64_t )be64toh(ranges[2*j+1]);
> +        fwts_log_info(fw,"Region name %80s"
> +                         " start: 0x%08lx, len: 0x%08lx\n",
> +             regions[j].name, regions[j].start, regions[j].len);
> +    }
> +
> +    offset = fdt_path_offset(fw->fdt, reserv_mem_node);
> +    if (offset < 0) {
> +        fwts_failed(fw, LOG_LEVEL_MEDIUM, "DTNodeMissing",
> +            "reserve memory node %s is missing", reserv_mem_node);
> +        return FWTS_ERROR;

CID 1374472 (#2 of 2): Resource leak (RESOURCE_LEAK)
leaked_storage: Variable regions going out of scope leaks the storage it
points to.

I'd recommend double checking all the return paths in the code below for
further potential leaks.


> +    }
> +
> +    /* Validate different cases */
> +    for(int j=0; j < nr_regions; j++) {
> +
> +        char *buf=NULL;
> +
> +        /* Check for zero offset's */
> +        if (regions[j].start == 0) {
> +            fwts_failed(fw, LOG_LEVEL_MEDIUM, "ZeroStartAddress",
> +            "memory region got zero start address");
> +            ok = false;
> +        }
> +
> +        /* Check for zero region sizes */
> +        if (regions[j].len == 0) {
> +            fwts_failed(fw, LOG_LEVEL_MEDIUM, "ZeroRegionSize",
> +            "memory region got zero size");
> +            ok = false;
> +        }
> +
> +        /* Check corresponding memory region got reserved by looking
> +            reserved-memory node entries */
> +
> +        /* Form the reserved-memory sub nodes for all the regions*/
> +        if (!strstr(regions[j].name, "@"))
> +            buf = make_message("%s%s@%lx", reserv_mem_node, regions[j].name,
> +                             regions[j].start);
> +        else
> +            buf = make_message("/%s/%s", reserv_mem_node, regions[j].name);
> +
> +        if(buf ==NULL) {
> +            fwts_skipped(fw, "Unable to allocate memory for message buffer");
> +            return FWTS_SKIP;
> +        }
> +
> +        offset = fdt_path_offset(fw->fdt, buf);
> +        if (offset < 0) {
> +            fwts_failed(fw, LOG_LEVEL_MEDIUM, "DTNodeMissing",
> +                "reserve memory region node %s is missing", buf);
> +            ok = false;
> +        }
> +
> +        if (skip)
> +           continue;
> +
> +        /* Validate different Known image fixed sizes here */
> +        if (strstr(regions[j].name, "homer-image")) {
> +            if(regions[j].len != configstruct.homer) {
> +                fwts_failed(fw, LOG_LEVEL_MEDIUM, "ImageSizeMismatch",
> +                "Mismatch in homer-image size, expected: 0x%lx, actual: 0x%lx",
> +                        configstruct.homer, regions[j].len);
> +            ok = false;
> +            }
> +            else
> +                fwts_log_info(fw, "homer-image size is validated");
> +        }
> +
> +        if (strstr(regions[j].name, "slw-image")) {
> +            if(regions[j].len != configstruct.slw) {
> +                fwts_failed(fw, LOG_LEVEL_MEDIUM, "ImageSizeMismatch",
> +                "Mismatch in slw-image size, expected: 0x%lx, actual: 0x%lx",
> +                        configstruct.slw, regions[j].len);
> +            ok = false;
> +            }
> +            else
> +                fwts_log_info(fw, "slw-image size is validated");
> +        }
> +
> +        if (strstr(regions[j].name, "occ-common-area")) {
> +            if(regions[j].len != configstruct.occ_common) {
> +                fwts_failed(fw, LOG_LEVEL_MEDIUM, "ImageSizeMismatch",
> +                "Mismatch in occ-common-area size,"
> +                "expected: 0x%lx, actual: 0x%lx",
> +                        configstruct.occ_common, regions[j].len);
> +            ok = false;
> +            }
> +            else
> +                fwts_log_info(fw, "occ-common-area size is validated");
> +        }
> +    }
> +
> +    if (ok)
> +        fwts_passed(fw, "Reserved memory validation tests passed");
> +    else
> +        fwts_failed(fw, LOG_LEVEL_HIGH, "ReservMemTestFail",
> +                "One or few Reserved Memory DT validation tests failed");
> +    free(regions);
> +    return FWTS_OK;
> +}
> +
> +static fwts_framework_minor_test reserv_mem_tests[] = {
> +    { reserv_mem_limits_test, "OPAL Reserved memory DT Validation Info" },
> +    { NULL, NULL }
> +};
> +
> +static fwts_framework_ops reserv_mem_tests_ops = {
> +    .description = "OPAL Reserved memory DT Validation Test",
> +    .init        = reserv_mem_init,
> +    .minor_tests = reserv_mem_tests
> +};
> +
> +FWTS_REGISTER_FEATURES("reserv_mem", &reserv_mem_tests_ops, FWTS_TEST_EARLY,
> +		FWTS_FLAG_BATCH | FWTS_FLAG_ROOT_PRIV,
> +		FWTS_FW_FEATURE_DEVICETREE)
>