memory/iommu: Add get_attr()
This adds get_attr() to IOMMUMemoryRegionClass, like
iommu_ops::domain_get_attr in the Linux kernel.
This defines the first attribute - IOMMU_ATTR_SPAPR_TCE_FD - which
will be used between the pSeries machine and VFIO-PCI.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
diff --git a/include/exec/memory.h b/include/exec/memory.h
index 07c5d6d..3ef8399 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -190,6 +190,10 @@
const MemoryRegionMmio old_mmio;
};
+enum IOMMUMemoryRegionAttr {
+ IOMMU_ATTR_SPAPR_TCE_FD
+};
+
typedef struct IOMMUMemoryRegionClass {
/* private */
struct DeviceClass parent_class;
@@ -210,6 +214,10 @@
IOMMUNotifierFlag new_flags);
/* Set this up to provide customized IOMMU replay function */
void (*replay)(IOMMUMemoryRegion *iommu, IOMMUNotifier *notifier);
+
+ /* Get IOMMU misc attributes */
+ int (*get_attr)(IOMMUMemoryRegion *iommu, enum IOMMUMemoryRegionAttr,
+ void *data);
} IOMMUMemoryRegionClass;
typedef struct CoalescedMemoryRange CoalescedMemoryRange;
@@ -927,6 +935,20 @@
IOMMUNotifier *n);
/**
+ * memory_region_iommu_get_attr: return an IOMMU attr if get_attr() is
+ * defined on the IOMMU.
+ *
+ * Returns 0 if succeded, error code otherwise.
+ *
+ * @iommu_mr: the memory region
+ * @attr: the requested attribute
+ * @data: a pointer to the requested attribute data
+ */
+int memory_region_iommu_get_attr(IOMMUMemoryRegion *iommu_mr,
+ enum IOMMUMemoryRegionAttr attr,
+ void *data);
+
+/**
* memory_region_name: get a memory region's name
*
* Returns the string that was used to initialize the memory region.
