diff options
Diffstat (limited to 'arch/x86/include/asm/iommu.h')
| -rw-r--r-- | arch/x86/include/asm/iommu.h | 32 |
1 files changed, 30 insertions, 2 deletions
diff --git a/arch/x86/include/asm/iommu.h b/arch/x86/include/asm/iommu.h index 345c99cef152..3be2451e7bc8 100644 --- a/arch/x86/include/asm/iommu.h +++ b/arch/x86/include/asm/iommu.h @@ -1,12 +1,40 @@ +/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_X86_IOMMU_H #define _ASM_X86_IOMMU_H -extern struct dma_map_ops nommu_dma_ops; +#include <linux/acpi.h> + +#include <asm/e820/api.h> + extern int force_iommu, no_iommu; extern int iommu_detected; -extern int iommu_pass_through; +extern int iommu_merge; +extern int panic_on_overflow; +extern bool amd_iommu_snp_en; + +#ifdef CONFIG_SWIOTLB +extern bool x86_swiotlb_enable; +#else +#define x86_swiotlb_enable false +#endif /* 10 seconds */ #define DMAR_OPERATION_TIMEOUT ((cycles_t) tsc_khz*10*1000) +static inline int __init +arch_rmrr_sanity_check(struct acpi_dmar_reserved_memory *rmrr) +{ + u64 start = rmrr->base_address; + u64 end = rmrr->end_address + 1; + int entry_type; + + entry_type = e820__get_entry_type(start, end); + if (entry_type == E820_TYPE_RESERVED || entry_type == E820_TYPE_NVS) + return 0; + + pr_err(FW_BUG "No firmware reserved region can cover this RMRR [%#018Lx-%#018Lx], contact BIOS vendor for fixes\n", + start, end - 1); + return -EINVAL; +} + #endif /* _ASM_X86_IOMMU_H */ |