diff options
Diffstat (limited to 'arch/x86/include/asm/iommu.h')
| -rw-r--r-- | arch/x86/include/asm/iommu.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/x86/include/asm/iommu.h b/arch/x86/include/asm/iommu.h index b91623d521d9..bf1ed2ddc74b 100644 --- a/arch/x86/include/asm/iommu.h +++ b/arch/x86/include/asm/iommu.h @@ -2,10 +2,28 @@ #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; + + if (e820__mapped_all(start, end, E820_TYPE_RESERVED)) + 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 */ |