cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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dimm_devs.c (874B)

      1// SPDX-License-Identifier: GPL-2.0
      2/* Copyright Intel Corp. 2018 */
      3#include <linux/init.h>
      4#include <linux/module.h>
      5#include <linux/moduleparam.h>
      6#include <linux/nd.h>
      7#include "pmem.h"
      8#include "pfn.h"
      9#include "nd.h"
     10#include "nd-core.h"
     11
     12ssize_t security_show(struct device *dev,
     13		struct device_attribute *attr, char *buf)
     14{
     15	struct nvdimm *nvdimm = to_nvdimm(dev);
     16
     17	/*
     18	 * For the test version we need to poll the "hardware" in order
     19	 * to get the updated status for unlock testing.
     20	 */
     21	nvdimm->sec.flags = nvdimm_security_flags(nvdimm, NVDIMM_USER);
     22
     23	if (test_bit(NVDIMM_SECURITY_DISABLED, &nvdimm->sec.flags))
     24		return sprintf(buf, "disabled\n");
     25	if (test_bit(NVDIMM_SECURITY_UNLOCKED, &nvdimm->sec.flags))
     26		return sprintf(buf, "unlocked\n");
     27	if (test_bit(NVDIMM_SECURITY_LOCKED, &nvdimm->sec.flags))
     28		return sprintf(buf, "locked\n");
     29	return -ENOTTY;
     30}