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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crash_dump.c (390B)

      1// SPDX-License-Identifier: GPL-2.0
      2#include <linux/highmem.h>
      3#include <linux/crash_dump.h>
      4#include <linux/uio.h>
      5
      6ssize_t copy_oldmem_page(struct iov_iter *iter, unsigned long pfn,
      7			 size_t csize, unsigned long offset)
      8{
      9	void  *vaddr;
     10
     11	if (!csize)
     12		return 0;
     13
     14	vaddr = kmap_local_pfn(pfn);
     15	csize = copy_to_iter(vaddr + offset, csize, iter);
     16	kunmap_local(vaddr);
     17
     18	return csize;
     19}