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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iommu_common.h (1319B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/* iommu_common.h: UltraSparc SBUS/PCI common iommu declarations.
      3 *
      4 * Copyright (C) 1999, 2008 David S. Miller (davem@davemloft.net)
      5 */
      6
      7#ifndef _IOMMU_COMMON_H
      8#define _IOMMU_COMMON_H
      9
     10#include <linux/kernel.h>
     11#include <linux/types.h>
     12#include <linux/sched.h>
     13#include <linux/mm.h>
     14#include <linux/scatterlist.h>
     15#include <linux/device.h>
     16#include <linux/iommu-helper.h>
     17
     18#include <asm/iommu.h>
     19
     20/*
     21 * These give mapping size of each iommu pte/tlb.
     22 */
     23#define IO_PAGE_SHIFT			13
     24#define IO_PAGE_SIZE			(1UL << IO_PAGE_SHIFT)
     25#define IO_PAGE_MASK			(~(IO_PAGE_SIZE-1))
     26#define IO_PAGE_ALIGN(addr)		ALIGN(addr, IO_PAGE_SIZE)
     27
     28#define IO_TSB_ENTRIES			(128*1024)
     29#define IO_TSB_SIZE			(IO_TSB_ENTRIES * 8)
     30
     31/*
     32 * This is the hardwired shift in the iotlb tag/data parts.
     33 */
     34#define IOMMU_PAGE_SHIFT		13
     35
     36#define SG_ENT_PHYS_ADDRESS(SG)	(__pa(sg_virt((SG))))
     37
     38static inline int is_span_boundary(unsigned long entry,
     39				   unsigned long shift,
     40				   unsigned long boundary_size,
     41				   struct scatterlist *outs,
     42				   struct scatterlist *sg)
     43{
     44	unsigned long paddr = SG_ENT_PHYS_ADDRESS(outs);
     45	int nr = iommu_num_pages(paddr, outs->dma_length + sg->length,
     46				 IO_PAGE_SIZE);
     47
     48	return iommu_is_span_boundary(entry, nr, shift, boundary_size);
     49}
     50
     51#endif /* _IOMMU_COMMON_H */