diff options
Diffstat (limited to 'drivers/iommu/amd_iommu_init.c')
| -rw-r--r-- | drivers/iommu/amd_iommu_init.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index 2c25ae306e7c..d1e5067852d4 100644 --- a/drivers/iommu/amd_iommu_init.c +++ b/drivers/iommu/amd_iommu_init.c @@ -25,6 +25,7 @@ #include <linux/interrupt.h> #include <linux/msi.h> #include <linux/amd-iommu.h> +#include <linux/export.h> #include <asm/pci-direct.h> #include <asm/iommu.h> #include <asm/gart.h> @@ -143,6 +144,8 @@ bool amd_iommu_iotlb_sup __read_mostly = true; u32 amd_iommu_max_pasids __read_mostly = ~0; +bool amd_iommu_v2_present __read_mostly; + /* * The ACPI table parsing functions set this variable on an error */ @@ -760,6 +763,12 @@ static void __init init_iommu_from_pci(struct amd_iommu *iommu) amd_iommu_max_pasids = min(amd_iommu_max_pasids, pasids); } + if (iommu_feature(iommu, FEATURE_GT) && + iommu_feature(iommu, FEATURE_PPR)) { + iommu->is_iommu_v2 = true; + amd_iommu_v2_present = true; + } + if (!is_rd890_iommu(iommu->dev)) return; @@ -1645,3 +1654,9 @@ IOMMU_INIT_FINISH(amd_iommu_detect, gart_iommu_hole_init, 0, 0); + +bool amd_iommu_v2_supported(void) +{ + return amd_iommu_v2_present; +} +EXPORT_SYMBOL(amd_iommu_v2_supported); |