Commit 5210fb4e authored by Jithu Joseph's avatar Jithu Joseph Committed by Hans de Goede
Browse files

platform/x86/intel/ifs: Sysfs interface for Array BIST 



The interface to trigger Array BIST test and obtain its result
is similar to the existing scan test. The only notable
difference is that, Array BIST doesn't require any test content
to be loaded. So binary load related options are not needed for
this test.

Add sysfs interface for array BIST test, the testing support will
be added by subsequent patch.

Signed-off-by: default avatarJithu Joseph <jithu.joseph@intel.com>
Reviewed-by: default avatarTony Luck <tony.luck@intel.com>
Link: https://lore.kernel.org/r/20230322003359.213046-7-jithu.joseph@intel.com


Reviewed-by: default avatarHans de Goede <hdegoede@redhat.com>
Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
parent d31bbdf4

drivers/platform/x86/intel/ifs/core.c

+2 −0
Original line number Diff line number Diff line
@@ -22,6 +22,7 @@ static const struct x86_cpu_id ifs_cpu_ids[] __initconst = { 
MODULE_DEVICE_TABLE(x86cpu, ifs_cpu_ids);



ATTRIBUTE_GROUPS(plat_ifs);

ATTRIBUTE_GROUPS(plat_ifs_array);



bool *ifs_pkg_auth;
@@ -49,6 +50,7 @@ static struct ifs_device ifs_devices[] = { 
		.misc = {

			.name = "intel_ifs_1",

			.minor = MISC_DYNAMIC_MINOR,

			.groups = plat_ifs_array_groups,

		},

	},

};

drivers/platform/x86/intel/ifs/ifs.h

+1 −0
Original line number Diff line number Diff line
@@ -256,5 +256,6 @@ extern bool *ifs_pkg_auth; 
int ifs_load_firmware(struct device *dev);

int do_core_test(int cpu, struct device *dev);

extern struct attribute *plat_ifs_attrs[];

extern struct attribute *plat_ifs_array_attrs[];



#endif

drivers/platform/x86/intel/ifs/runtest.c

+12 −1
Original line number Diff line number Diff line
@@ -236,6 +236,8 @@ static void ifs_test_core(int cpu, struct device *dev) 
 */

int do_core_test(int cpu, struct device *dev)

{

	const struct ifs_test_caps *test = ifs_get_test_caps(dev);

	struct ifs_data *ifsd = ifs_get_data(dev);

	int ret = 0;



	/* Prevent CPUs from being taken offline during the scan test */
@@ -247,7 +249,16 @@ int do_core_test(int cpu, struct device *dev) 
		goto out;

	}



	switch (test->test_num) {

	case IFS_TYPE_SAF:

		if (!ifsd->loaded)

			return -EPERM;

		ifs_test_core(cpu, dev);

		break;

	case IFS_TYPE_ARRAY_BIST:

	default:

		return -EINVAL;

	}

out:

	cpus_read_unlock();

	return ret;

drivers/platform/x86/intel/ifs/sysfs.c

+9 −5
Original line number Diff line number Diff line
@@ -64,7 +64,6 @@ static ssize_t run_test_store(struct device *dev, 
			      struct device_attribute *attr,

			      const char *buf, size_t count)

{

	struct ifs_data *ifsd = ifs_get_data(dev);

	unsigned int cpu;

	int rc;
@@ -75,9 +74,6 @@ static ssize_t run_test_store(struct device *dev, 
	if (down_interruptible(&ifs_sem))

		return -EINTR;



	if (!ifsd->loaded)

		rc = -EPERM;

	else

	rc = do_core_test(cpu, dev);



	up(&ifs_sem);
@@ -149,3 +145,11 @@ struct attribute *plat_ifs_attrs[] = { 
	&dev_attr_image_version.attr,

	NULL

};



/* global array sysfs attributes */

struct attribute *plat_ifs_array_attrs[] = {

	&dev_attr_details.attr,

	&dev_attr_status.attr,

	&dev_attr_run_test.attr,

	NULL

};