LXR linux/arch/x86/include/asm/iommu.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef _ASM_X86_IOMMU_H
   3#define _ASM_X86_IOMMU_H
   4
   5#include <linux/acpi.h>
   6
   7#include <asm/e820/api.h>
   8
   9extern int force_iommu, no_iommu;
  10extern int iommu_detected;
  11
  12/* 10 seconds */
  13#define DMAR_OPERATION_TIMEOUT ((cycles_t) tsc_khz*10*1000)
  14
  15static inline int __init
  16arch_rmrr_sanity_check(struct acpi_dmar_reserved_memory *rmrr)
  17{
  18        u64 start = rmrr->base_address;
  19        u64 end = rmrr->end_address + 1;
  20
  21        if (e820__mapped_all(start, end, E820_TYPE_RESERVED))
  22                return 0;
  23
  24        pr_err(FW_BUG "No firmware reserved region can cover this RMRR [%#018Lx-%#018Lx], contact BIOS vendor for fixes\n",
  25               start, end - 1);
  26        return -EINVAL;
  27}
  28
  29#endif /* _ASM_X86_IOMMU_H */
  30