Commit 18fa5563 authored by Dave Jiang's avatar Dave Jiang Committed by Dan Williams
Browse files

tools/testing/cxl: add mechanism to lock mem device for testing 



The mock cxl mem devs needs a way to go into "locked" status to simulate
when the platform is rebooted. Add a sysfs mechanism so the device security
state is set to "locked" and the frozen state bits are cleared.

Reviewed-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: default avatarDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/166983617602.2734609.7042497620931694717.stgit@djiang5-desk3.ch.intel.com


Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent bd429e53

tools/testing/cxl/test/mem.c

+44 −4
Original line number Diff line number Diff line
@@ -245,7 +245,7 @@ static int mock_set_passphrase(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd 


static int mock_disable_passphrase(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)

{

	struct cxl_mock_mem_pdata *mdata = dev_get_platdata(cxlds->dev);

	struct cxl_mockmem_data *mdata = dev_get_drvdata(cxlds->dev);

	struct cxl_disable_pass *dis_pass;



	if (cmd->size_in != sizeof(*dis_pass))
@@ -316,7 +316,7 @@ static int mock_disable_passphrase(struct cxl_dev_state *cxlds, struct cxl_mbox_ 


static int mock_freeze_security(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)

{

	struct cxl_mock_mem_pdata *mdata = dev_get_platdata(cxlds->dev);

	struct cxl_mockmem_data *mdata = dev_get_drvdata(cxlds->dev);



	if (cmd->size_in != 0)

		return -EINVAL;
@@ -333,7 +333,7 @@ static int mock_freeze_security(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd 


static int mock_unlock_security(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)

{

	struct cxl_mock_mem_pdata *mdata = dev_get_platdata(cxlds->dev);

	struct cxl_mockmem_data *mdata = dev_get_drvdata(cxlds->dev);



	if (cmd->size_in != NVDIMM_PASSPHRASE_LEN)

		return -EINVAL;
@@ -376,7 +376,7 @@ static int mock_unlock_security(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd 
static int mock_passphrase_secure_erase(struct cxl_dev_state *cxlds,

					struct cxl_mbox_cmd *cmd)

{

	struct cxl_mock_mem_pdata *mdata = dev_get_platdata(cxlds->dev);

	struct cxl_mockmem_data *mdata = dev_get_drvdata(cxlds->dev);

	struct cxl_pass_erase *erase;



	if (cmd->size_in != sizeof(*erase))
@@ -650,6 +650,45 @@ static int cxl_mock_mem_probe(struct platform_device *pdev) 
	return 0;

}



static ssize_t security_lock_show(struct device *dev,

				  struct device_attribute *attr, char *buf)

{

	struct cxl_mockmem_data *mdata = dev_get_drvdata(dev);



	return sysfs_emit(buf, "%u\n",

			  !!(mdata->security_state & CXL_PMEM_SEC_STATE_LOCKED));

}



static ssize_t security_lock_store(struct device *dev, struct device_attribute *attr,

				   const char *buf, size_t count)

{

	struct cxl_mockmem_data *mdata = dev_get_drvdata(dev);

	u32 mask = CXL_PMEM_SEC_STATE_FROZEN | CXL_PMEM_SEC_STATE_USER_PLIMIT |

		   CXL_PMEM_SEC_STATE_MASTER_PLIMIT;

	int val;



	if (kstrtoint(buf, 0, &val) < 0)

		return -EINVAL;



	if (val == 1) {

		if (!(mdata->security_state & CXL_PMEM_SEC_STATE_USER_PASS_SET))

			return -ENXIO;

		mdata->security_state |= CXL_PMEM_SEC_STATE_LOCKED;

		mdata->security_state &= ~mask;

	} else {

		return -EINVAL;

	}

	return count;

}



static DEVICE_ATTR_RW(security_lock);



static struct attribute *cxl_mock_mem_attrs[] = {

	&dev_attr_security_lock.attr,

	NULL

};

ATTRIBUTE_GROUPS(cxl_mock_mem);



static const struct platform_device_id cxl_mock_mem_ids[] = {

	{ .name = "cxl_mem", },

	{ },
@@ -661,6 +700,7 @@ static struct platform_driver cxl_mock_mem_driver = { 
	.id_table = cxl_mock_mem_ids,

	.driver = {

		.name = KBUILD_MODNAME,

		.dev_groups = cxl_mock_mem_groups,

	},

};