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habanalabs: expose device security status through sysfs

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In order for the user to know if he is running on a secured device
or not, a sysfs node is added.

Signed-off-by: Ofir Bitton <obitton@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
This commit is contained in:
Ofir Bitton 2022-08-03 17:16:56 +03:00 committed by Oded Gabbay
parent 107a5bcc0b
commit 6457271f64
2 changed files with 16 additions and 0 deletions
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6
Documentation/ABI/testing/sysfs-driver-habanalabs
View file

@ -176,6 +176,12 @@ KernelVersion: 5.1
Contact: ogabbay@kernel.org
Description: Version of the device's preboot F/W code
What: /sys/class/habanalabs/hl<n>/security_enabled
Date: Oct 2022
KernelVersion: 6.1
Contact: obitton@habana.ai
Description: Displays the device's security status
What: /sys/class/habanalabs/hl<n>/soft_reset
Date: Jan 2019
KernelVersion: 5.1

10
drivers/misc/habanalabs/common/sysfs.c
View file

@ -375,6 +375,14 @@ static ssize_t eeprom_read_handler(struct file *filp, struct kobject *kobj,
return max_size;
}
static ssize_t security_enabled_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct hl_device *hdev = dev_get_drvdata(dev);
return sprintf(buf, "%d\n", hdev->asic_prop.fw_security_enabled);
}
static DEVICE_ATTR_RO(armcp_kernel_ver);
static DEVICE_ATTR_RO(armcp_ver);
static DEVICE_ATTR_RO(cpld_ver);
@ -393,6 +401,7 @@ static DEVICE_ATTR_RO(status);
static DEVICE_ATTR_RO(thermal_ver);
static DEVICE_ATTR_RO(uboot_ver);
static DEVICE_ATTR_RO(fw_os_ver);
static DEVICE_ATTR_RO(security_enabled);
static struct bin_attribute bin_attr_eeprom = {
.attr = {.name = "eeprom", .mode = (0444)},
@ -417,6 +426,7 @@ static struct attribute *hl_dev_attrs[] = {
&dev_attr_thermal_ver.attr,
&dev_attr_uboot_ver.attr,
&dev_attr_fw_os_ver.attr,
&dev_attr_security_enabled.attr,
NULL,
};