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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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3c13e2ac74
Add nfit_test support for DSM functions "Get Security State", "Set Passphrase", "Disable Passphrase", "Unlock Unit", "Freeze Lock", and "Secure Erase" for the fake DIMMs. Also adding a sysfs knob in order to put the DIMMs in "locked" state. The order of testing DIMM unlocking would be. 1a. Disable DIMM X. 1b. Set Passphrase to DIMM X. 2. Write to /sys/devices/platform/nfit_test.0/nfit_test_dimm/test_dimmX/lock_dimm 3. Renable DIMM X 4. Check DIMM X state via sysfs "security" attribute for nmemX. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
42 lines
1.0 KiB
C
42 lines
1.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright Intel Corp. 2018 */
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/nd.h>
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#include "pmem.h"
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#include "pfn.h"
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#include "nd.h"
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#include "nd-core.h"
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ssize_t security_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct nvdimm *nvdimm = to_nvdimm(dev);
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/*
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* For the test version we need to poll the "hardware" in order
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* to get the updated status for unlock testing.
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*/
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nvdimm->sec.state = nvdimm_security_state(nvdimm, false);
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nvdimm->sec.ext_state = nvdimm_security_state(nvdimm, true);
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switch (nvdimm->sec.state) {
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case NVDIMM_SECURITY_DISABLED:
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return sprintf(buf, "disabled\n");
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case NVDIMM_SECURITY_UNLOCKED:
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return sprintf(buf, "unlocked\n");
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case NVDIMM_SECURITY_LOCKED:
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return sprintf(buf, "locked\n");
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case NVDIMM_SECURITY_FROZEN:
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return sprintf(buf, "frozen\n");
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case NVDIMM_SECURITY_OVERWRITE:
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return sprintf(buf, "overwrite\n");
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default:
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return -ENOTTY;
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}
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return -ENOTTY;
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}
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