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.h (855B)

      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;
     11extern int iommu_merge;
     12extern int panic_on_overflow;
     13
     14#ifdef CONFIG_SWIOTLB
     15extern bool x86_swiotlb_enable;
     16#else
     17#define x86_swiotlb_enable false
     18#endif
     19
     20/* 10 seconds */
     21#define DMAR_OPERATION_TIMEOUT ((cycles_t) tsc_khz*10*1000)
     22
     23static inline int __init
     24arch_rmrr_sanity_check(struct acpi_dmar_reserved_memory *rmrr)
     25{
     26	u64 start = rmrr->base_address;
     27	u64 end = rmrr->end_address + 1;
     28
     29	if (e820__mapped_all(start, end, E820_TYPE_RESERVED))
     30		return 0;
     31
     32	pr_err(FW_BUG "No firmware reserved region can cover this RMRR [%#018Lx-%#018Lx], contact BIOS vendor for fixes\n",
     33	       start, end - 1);
     34	return -EINVAL;
     35}
     36
     37#endif /* _ASM_X86_IOMMU_H */