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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: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/166983617602.2734609.7042497620931694717.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dave Jiang 2022-11-30 12:22:56 -07:00 committed by Dan Williams
parent bd429e5355
commit 18fa556375
1 changed files with 44 additions and 4 deletions
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48
tools/testing/cxl/test/mem.c
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@ -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) 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; struct cxl_disable_pass *dis_pass;
if (cmd->size_in != sizeof(*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) 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) if (cmd->size_in != 0)
return -EINVAL; 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) 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) if (cmd->size_in != NVDIMM_PASSPHRASE_LEN)
return -EINVAL; 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, static int mock_passphrase_secure_erase(struct cxl_dev_state *cxlds,
struct cxl_mbox_cmd *cmd) 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; struct cxl_pass_erase *erase;
if (cmd->size_in != sizeof(*erase)) if (cmd->size_in != sizeof(*erase))
@ -650,6 +650,45 @@ static int cxl_mock_mem_probe(struct platform_device *pdev)
return 0; 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[] = { static const struct platform_device_id cxl_mock_mem_ids[] = {
{ .name = "cxl_mem", }, { .name = "cxl_mem", },
{ }, { },
@ -661,6 +700,7 @@ static struct platform_driver cxl_mock_mem_driver = {
.id_table = cxl_mock_mem_ids, .id_table = cxl_mock_mem_ids,
.driver = { .driver = {
.name = KBUILD_MODNAME, .name = KBUILD_MODNAME,
.dev_groups = cxl_mock_mem_groups,
}, },
}; };