diff options
Diffstat (limited to 'drivers/iommu/intel-svm.c')
| -rw-r--r-- | drivers/iommu/intel-svm.c | 40 |
1 files changed, 27 insertions, 13 deletions
diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c index dca88f9fdf29..e4a5d542b84f 100644 --- a/drivers/iommu/intel-svm.c +++ b/drivers/iommu/intel-svm.c @@ -23,19 +23,6 @@ static irqreturn_t prq_event_thread(int irq, void *d); -int intel_svm_init(struct intel_iommu *iommu) -{ - if (cpu_feature_enabled(X86_FEATURE_GBPAGES) && - !cap_fl1gp_support(iommu->cap)) - return -EINVAL; - - if (cpu_feature_enabled(X86_FEATURE_LA57) && - !cap_5lp_support(iommu->cap)) - return -EINVAL; - - return 0; -} - #define PRQ_ORDER 0 int intel_svm_enable_prq(struct intel_iommu *iommu) @@ -99,6 +86,33 @@ int intel_svm_finish_prq(struct intel_iommu *iommu) return 0; } +static inline bool intel_svm_capable(struct intel_iommu *iommu) +{ + return iommu->flags & VTD_FLAG_SVM_CAPABLE; +} + +void intel_svm_check(struct intel_iommu *iommu) +{ + if (!pasid_supported(iommu)) + return; + + if (cpu_feature_enabled(X86_FEATURE_GBPAGES) && + !cap_fl1gp_support(iommu->cap)) { + pr_err("%s SVM disabled, incompatible 1GB page capability\n", + iommu->name); + return; + } + + if (cpu_feature_enabled(X86_FEATURE_LA57) && + !cap_5lp_support(iommu->cap)) { + pr_err("%s SVM disabled, incompatible paging mode\n", + iommu->name); + return; + } + + iommu->flags |= VTD_FLAG_SVM_CAPABLE; +} + static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_dev *sdev, unsigned long address, unsigned long pages, int ih) { |