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memory/iommu: introduce IOMMUMemoryRegionClass

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This finishes QOM'fication of IOMMUMemoryRegion by introducing
a IOMMUMemoryRegionClass. This also provides a fastpath analog for
IOMMU_MEMORY_REGION_GET_CLASS().

This makes IOMMUMemoryRegion an abstract class.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Message-Id: <20170711035620.4232-3-aik@ozlabs.ru>
Acked-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Alexey Kardashevskiy 2017-07-11 13:56:20 +10:00 • committed by Paolo Bonzini
parent 3df9d74806
commit 1221a47467
15 changed files with 205 additions and 70 deletions
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45
include/exec/memory.h
View file

@ -25,6 +25,7 @@
#include "qemu/notify.h"
#include "qom/object.h"
#include "qemu/rcu.h"
#include "hw/qdev-core.h"
#define RAM_ADDR_INVALID (~(ram_addr_t)0)
@ -38,6 +39,12 @@
#define TYPE_IOMMU_MEMORY_REGION "qemu:iommu-memory-region"
#define IOMMU_MEMORY_REGION(obj) \
OBJECT_CHECK(IOMMUMemoryRegion, (obj), TYPE_IOMMU_MEMORY_REGION)
#define IOMMU_MEMORY_REGION_CLASS(klass) \
OBJECT_CLASS_CHECK(IOMMUMemoryRegionClass, (klass), \
TYPE_IOMMU_MEMORY_REGION)
#define IOMMU_MEMORY_REGION_GET_CLASS(obj) \
OBJECT_GET_CLASS(IOMMUMemoryRegionClass, (obj), \
TYPE_IOMMU_MEMORY_REGION)
typedef struct MemoryRegionOps MemoryRegionOps;
typedef struct MemoryRegionMmio MemoryRegionMmio;
@ -193,9 +200,10 @@ struct MemoryRegionOps {
const MemoryRegionMmio old_mmio;
};
typedef struct MemoryRegionIOMMUOps MemoryRegionIOMMUOps;
typedef struct IOMMUMemoryRegionClass {
/* private */
struct DeviceClass parent_class;
struct MemoryRegionIOMMUOps {
/*
* Return a TLB entry that contains a given address. Flag should
* be the access permission of this translation operation. We can
@ -212,7 +220,7 @@ struct MemoryRegionIOMMUOps {
IOMMUNotifierFlag new_flags);
/* Set this up to provide customized IOMMU replay function */
void (*replay)(IOMMUMemoryRegion *iommu, IOMMUNotifier *notifier);
};
} IOMMUMemoryRegionClass;
typedef struct CoalescedMemoryRange CoalescedMemoryRange;
typedef struct MemoryRegionIoeventfd MemoryRegionIoeventfd;
@ -261,7 +269,6 @@ struct MemoryRegion {
struct IOMMUMemoryRegion {
MemoryRegion parent_obj;
const MemoryRegionIOMMUOps *iommu_ops;
QLIST_HEAD(, IOMMUNotifier) iommu_notify;
IOMMUNotifierFlag iommu_notify_flags;
};
@ -622,21 +629,24 @@ static inline void memory_region_init_reservation(MemoryRegion *mr,
}
/**
* memory_region_init_iommu: Initialize a memory region that translates
* addresses
* memory_region_init_iommu: Initialize a memory region of a custom type
* that translates addresses
*
* An IOMMU region translates addresses and forwards accesses to a target
* memory region.
*
* @iommu_mr: the #IOMMUMemoryRegion to be initialized
* @typename: QOM class name
* @_iommu_mr: the #IOMMUMemoryRegion to be initialized
* @instance_size: the IOMMUMemoryRegion subclass instance size
* @owner: the object that tracks the region's reference count
* @ops: a function that translates addresses into the @target region
* @name: used for debugging; not visible to the user or ABI
* @size: size of the region.
*/
void memory_region_init_iommu(IOMMUMemoryRegion *iommu_mr,
struct Object *owner,
const MemoryRegionIOMMUOps *ops,
void memory_region_init_iommu(void *_iommu_mr,
size_t instance_size,
const char *mrtypename,
Object *owner,
const char *name,
uint64_t size);
@ -707,6 +717,21 @@ static inline IOMMUMemoryRegion *memory_region_get_iommu(MemoryRegion *mr)
return NULL;
}
/**
* memory_region_get_iommu_class_nocheck: returns iommu memory region class
* if an iommu or NULL if not
*
* Returns pointer to IOMMUMemoryRegioniClass if a memory region is an iommu,
* otherwise NULL. This is fast path avoinding QOM checking, use with caution.
*
* @mr: the memory region being queried
*/
static inline IOMMUMemoryRegionClass *memory_region_get_iommu_class_nocheck(
IOMMUMemoryRegion *iommu_mr)
{
return (IOMMUMemoryRegionClass *) (((Object *)iommu_mr)->class);
}
#define memory_region_is_iommu(mr) (memory_region_get_iommu(mr) != NULL)
/**