diff options
| -rw-r--r-- | drivers/platform/mellanox/mlxbf-bootctl.c | 67 | ||||
| -rw-r--r-- | drivers/platform/mellanox/mlxbf-bootctl.h | 19 | ||||
| -rw-r--r-- | drivers/platform/x86/dell/dell-wmi-sysman/sysman.c | 9 |
3 files changed, 92 insertions, 3 deletions
diff --git a/drivers/platform/mellanox/mlxbf-bootctl.c b/drivers/platform/mellanox/mlxbf-bootctl.c index fb9f7815c6cd..0bf29eee1e70 100644 --- a/drivers/platform/mellanox/mlxbf-bootctl.c +++ b/drivers/platform/mellanox/mlxbf-bootctl.c @@ -79,6 +79,9 @@ static void __iomem *mlxbf_rsh_scratch_buf_data; static const char * const mlxbf_rsh_log_level[] = { "INFO", "WARN", "ERR", "ASSERT"}; +static DEFINE_MUTEX(icm_ops_lock); +static DEFINE_MUTEX(os_up_lock); + /* ARM SMC call which is atomic and no need for lock. */ static int mlxbf_bootctl_smc(unsigned int smc_op, int smc_arg) { @@ -391,6 +394,66 @@ done: return count; } +static ssize_t large_icm_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct arm_smccc_res res; + + mutex_lock(&icm_ops_lock); + arm_smccc_smc(MLNX_HANDLE_GET_ICM_INFO, 0, 0, 0, 0, + 0, 0, 0, &res); + mutex_unlock(&icm_ops_lock); + if (res.a0) + return -EPERM; + + return snprintf(buf, PAGE_SIZE, "0x%lx", res.a1); +} + +static ssize_t large_icm_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct arm_smccc_res res; + unsigned long icm_data; + int err; + + err = kstrtoul(buf, MLXBF_LARGE_ICMC_MAX_STRING_SIZE, &icm_data); + if (err) + return err; + + if ((icm_data != 0 && icm_data < MLXBF_LARGE_ICMC_SIZE_MIN) || + icm_data > MLXBF_LARGE_ICMC_SIZE_MAX || icm_data % MLXBF_LARGE_ICMC_GRANULARITY) + return -EPERM; + + mutex_lock(&icm_ops_lock); + arm_smccc_smc(MLNX_HANDLE_SET_ICM_INFO, icm_data, 0, 0, 0, 0, 0, 0, &res); + mutex_unlock(&icm_ops_lock); + + return res.a0 ? -EPERM : count; +} + +static ssize_t os_up_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct arm_smccc_res res; + unsigned long val; + int err; + + err = kstrtoul(buf, 10, &val); + if (err) + return err; + + if (val != 1) + return -EINVAL; + + mutex_lock(&os_up_lock); + arm_smccc_smc(MLNX_HANDLE_OS_UP, 0, 0, 0, 0, 0, 0, 0, &res); + mutex_unlock(&os_up_lock); + + return count; +} + static DEVICE_ATTR_RW(post_reset_wdog); static DEVICE_ATTR_RW(reset_action); static DEVICE_ATTR_RW(second_reset_action); @@ -398,6 +461,8 @@ static DEVICE_ATTR_RO(lifecycle_state); static DEVICE_ATTR_RO(secure_boot_fuse_state); static DEVICE_ATTR_WO(fw_reset); static DEVICE_ATTR_WO(rsh_log); +static DEVICE_ATTR_RW(large_icm); +static DEVICE_ATTR_WO(os_up); static struct attribute *mlxbf_bootctl_attrs[] = { &dev_attr_post_reset_wdog.attr, @@ -407,6 +472,8 @@ static struct attribute *mlxbf_bootctl_attrs[] = { &dev_attr_secure_boot_fuse_state.attr, &dev_attr_fw_reset.attr, &dev_attr_rsh_log.attr, + &dev_attr_large_icm.attr, + &dev_attr_os_up.attr, NULL }; diff --git a/drivers/platform/mellanox/mlxbf-bootctl.h b/drivers/platform/mellanox/mlxbf-bootctl.h index b48243f60a59..613963d448f2 100644 --- a/drivers/platform/mellanox/mlxbf-bootctl.h +++ b/drivers/platform/mellanox/mlxbf-bootctl.h @@ -81,6 +81,20 @@ */ #define MLXBF_BOOTCTL_FW_RESET 0x8200000D +/* + * SMC function IDs to set and get the large ICM carveout size + * stored in the eeprom. + */ +#define MLNX_HANDLE_SET_ICM_INFO 0x82000012 +#define MLNX_HANDLE_GET_ICM_INFO 0x82000013 + +#define MAX_ICM_BUFFER_SIZE 10 + +/* + * SMC function ID to set the ARM boot state to up + */ +#define MLNX_HANDLE_OS_UP 0x82000014 + /* SMC function IDs for SiP Service queries */ #define MLXBF_BOOTCTL_SIP_SVC_CALL_COUNT 0x8200ff00 #define MLXBF_BOOTCTL_SIP_SVC_UID 0x8200ff01 @@ -106,4 +120,9 @@ /* Additional value to disable the MLXBF_BOOTCTL_SET_SECOND_RESET_ACTION. */ #define MLXBF_BOOTCTL_NONE 0x7fffffff /* Don't change next boot action */ +#define MLXBF_LARGE_ICMC_MAX_STRING_SIZE 16 +#define MLXBF_LARGE_ICMC_SIZE_MIN 0x80 +#define MLXBF_LARGE_ICMC_SIZE_MAX 0x100000 +#define MLXBF_LARGE_ICMC_GRANULARITY MLXBF_LARGE_ICMC_SIZE_MIN + #endif /* __MLXBF_BOOTCTL_H__ */ diff --git a/drivers/platform/x86/dell/dell-wmi-sysman/sysman.c b/drivers/platform/x86/dell/dell-wmi-sysman/sysman.c index b68dd11cb892..b929b4f82420 100644 --- a/drivers/platform/x86/dell/dell-wmi-sysman/sysman.c +++ b/drivers/platform/x86/dell/dell-wmi-sysman/sysman.c @@ -393,6 +393,7 @@ static int init_bios_attributes(int attr_type, const char *guid) struct kobject *attr_name_kobj; //individual attribute names union acpi_object *obj = NULL; union acpi_object *elements; + struct kobject *duplicate; struct kset *tmp_set; int min_elements; @@ -451,9 +452,11 @@ static int init_bios_attributes(int attr_type, const char *guid) else tmp_set = wmi_priv.main_dir_kset; - if (kset_find_obj(tmp_set, elements[ATTR_NAME].string.pointer)) { - pr_debug("duplicate attribute name found - %s\n", - elements[ATTR_NAME].string.pointer); + duplicate = kset_find_obj(tmp_set, elements[ATTR_NAME].string.pointer); + if (duplicate) { + pr_debug("Duplicate attribute name found - %s\n", + elements[ATTR_NAME].string.pointer); + kobject_put(duplicate); goto nextobj; } |