@@ -148,6 +148,10 @@ struct IOMMUTLBEntry {
uint32_t pasid;
};
+/* Check if an IOMMU TLB entry indicates a translation error */
+#define IOMMU_TLB_ENTRY_TRANSLATION_ERROR(entry) ((((entry)->perm) & IOMMU_RW) \
+ == IOMMU_NONE)
+
/*
* Bitmap for different IOMMUNotifier capabilities. Each notifier can
* register with one or multiple IOMMU Notifier capability bit(s).
@@ -567,6 +571,20 @@ struct IOMMUMemoryRegionClass {
int (*iommu_set_iova_ranges)(IOMMUMemoryRegion *iommu,
GList *iova_ranges,
Error **errp);
+
+ /**
+ * @iommu_ats_request_translation:
+ * This method must be implemented if the IOMMU has ATS enabled
+ *
+ * @see pci_ats_request_translation_pasid
+ */
+ ssize_t (*iommu_ats_request_translation)(IOMMUMemoryRegion *iommu,
+ bool priv_req, bool exec_req,
+ hwaddr addr, size_t length,
+ bool no_write,
+ IOMMUTLBEntry *result,
+ size_t result_length,
+ uint32_t *err_count);
};
typedef struct RamDiscardListener RamDiscardListener;
@@ -1870,6 +1888,14 @@ void memory_region_iommu_replay(IOMMUMemoryRegion *iommu_mr, IOMMUNotifier *n);
void memory_region_unregister_iommu_notifier(MemoryRegion *mr,
IOMMUNotifier *n);
+ssize_t memory_region_iommu_ats_request_translation(IOMMUMemoryRegion *iommu_mr,
+ bool priv_req, bool exec_req,
+ hwaddr addr, size_t length,
+ bool no_write,
+ IOMMUTLBEntry *result,
+ size_t result_length,
+ uint32_t *err_count);
+
/**
* memory_region_iommu_get_attr: return an IOMMU attr if get_attr() is
* defined on the IOMMU.
@@ -2000,6 +2000,26 @@ void memory_region_unregister_iommu_notifier(MemoryRegion *mr,
memory_region_update_iommu_notify_flags(iommu_mr, NULL);
}
+ssize_t memory_region_iommu_ats_request_translation(IOMMUMemoryRegion *iommu_mr,
+ bool priv_req,
+ bool exec_req,
+ hwaddr addr, size_t length,
+ bool no_write,
+ IOMMUTLBEntry *result,
+ size_t result_length,
+ uint32_t *err_count)
+{
+ IOMMUMemoryRegionClass *imrc = memory_region_get_iommu_class_nocheck(iommu_mr);
+
+ if (!imrc->iommu_ats_request_translation) {
+ return -ENODEV;
+ }
+
+ return imrc->iommu_ats_request_translation(iommu_mr, priv_req, exec_req,
+ addr, length, no_write, result,
+ result_length, err_count);
+}
+
void memory_region_notify_iommu_one(IOMMUNotifier *notifier,
IOMMUTLBEvent *event)
{
IOMMU have to implement iommu_ats_request_translation to support ATS. Devices can use IOMMU_TLB_ENTRY_TRANSLATION_ERROR to check the tlb entries returned by a translation request. Signed-off-by: Clément Mathieu--Drif <clement.mathieu--drif@eviden.com> --- include/exec/memory.h | 26 ++++++++++++++++++++++++++ system/memory.c | 20 ++++++++++++++++++++ 2 files changed, 46 insertions(+)