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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pmem.c (748B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * Copyright (c) 2015, Christoph Hellwig.
      4 * Copyright (c) 2015, Intel Corporation.
      5 */
      6#include <linux/platform_device.h>
      7#include <linux/init.h>
      8#include <linux/ioport.h>
      9
     10static int found(struct resource *res, void *data)
     11{
     12	return 1;
     13}
     14
     15static __init int register_e820_pmem(void)
     16{
     17	struct platform_device *pdev;
     18	int rc;
     19
     20	rc = walk_iomem_res_desc(IORES_DESC_PERSISTENT_MEMORY_LEGACY,
     21				 IORESOURCE_MEM, 0, -1, NULL, found);
     22	if (rc <= 0)
     23		return 0;
     24
     25	/*
     26	 * See drivers/nvdimm/e820.c for the implementation, this is
     27	 * simply here to trigger the module to load on demand.
     28	 */
     29	pdev = platform_device_alloc("e820_pmem", -1);
     30	return platform_device_add(pdev);
     31}
     32device_initcall(register_e820_pmem);