| 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 | |
| 9 | extern int force_iommu, no_iommu; |
| 10 | extern int iommu_detected; |
| 11 | extern int iommu_merge; |
| 12 | extern int panic_on_overflow; |
| 13 | |
| 14 | #ifdef CONFIG_SWIOTLB |
| 15 | extern 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 | |
| 23 | static inline int __init |
| 24 | arch_rmrr_sanity_check(struct acpi_dmar_reserved_memory *rmrr) |
| 25 | { |
| 26 | u64 start = rmrr->base_address; |
| 27 | u64 end = rmrr->end_address + 1; |
| 28 | int entry_type; |
| 29 | |
| 30 | entry_type = e820__get_entry_type(start, end); |
| 31 | if (entry_type == E820_TYPE_RESERVED || entry_type == E820_TYPE_NVS) |
| 32 | return 0; |
| 33 | |
| 34 | pr_err(FW_BUG "No firmware reserved region can cover this RMRR [%#018Lx-%#018Lx], contact BIOS vendor for fixes\n", |
| 35 | start, end - 1); |
| 36 | return -EINVAL; |
| 37 | } |
| 38 | |
| 39 | #endif /* _ASM_X86_IOMMU_H */ |
| 40 |