| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef _ASM_X86_IOMMU_H |
| #define _ASM_X86_IOMMU_H |
| |
| #include <linux/acpi.h> |
| |
| #include <asm/e820/api.h> |
| |
| extern int force_iommu, no_iommu; |
| extern int iommu_detected; |
| |
| /* 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 */ |
