Simplify the users of memory_region_snapshot_and_clear_dirty, so that they do not have to call memory_region_sync_dirty_bitmap explicitly. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
1980 lines
76 KiB
C
1980 lines
76 KiB
C
/*
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* Physical memory management API
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*
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* Copyright 2011 Red Hat, Inc. and/or its affiliates
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*
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* Authors:
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* Avi Kivity <avi@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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*/
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#ifndef MEMORY_H
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#define MEMORY_H
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#ifndef CONFIG_USER_ONLY
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#include "exec/cpu-common.h"
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#include "exec/hwaddr.h"
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#include "exec/memattrs.h"
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#include "exec/ramlist.h"
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#include "qemu/queue.h"
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#include "qemu/int128.h"
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#include "qemu/notify.h"
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#include "qom/object.h"
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#include "qemu/rcu.h"
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#include "hw/qdev-core.h"
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#define RAM_ADDR_INVALID (~(ram_addr_t)0)
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#define MAX_PHYS_ADDR_SPACE_BITS 62
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#define MAX_PHYS_ADDR (((hwaddr)1 << MAX_PHYS_ADDR_SPACE_BITS) - 1)
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#define TYPE_MEMORY_REGION "qemu:memory-region"
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#define MEMORY_REGION(obj) \
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OBJECT_CHECK(MemoryRegion, (obj), TYPE_MEMORY_REGION)
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#define TYPE_IOMMU_MEMORY_REGION "qemu:iommu-memory-region"
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#define IOMMU_MEMORY_REGION(obj) \
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OBJECT_CHECK(IOMMUMemoryRegion, (obj), TYPE_IOMMU_MEMORY_REGION)
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#define IOMMU_MEMORY_REGION_CLASS(klass) \
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OBJECT_CLASS_CHECK(IOMMUMemoryRegionClass, (klass), \
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TYPE_IOMMU_MEMORY_REGION)
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#define IOMMU_MEMORY_REGION_GET_CLASS(obj) \
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OBJECT_GET_CLASS(IOMMUMemoryRegionClass, (obj), \
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TYPE_IOMMU_MEMORY_REGION)
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typedef struct MemoryRegionOps MemoryRegionOps;
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typedef struct MemoryRegionMmio MemoryRegionMmio;
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struct MemoryRegionMmio {
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CPUReadMemoryFunc *read[3];
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CPUWriteMemoryFunc *write[3];
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};
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typedef struct IOMMUTLBEntry IOMMUTLBEntry;
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/* See address_space_translate: bit 0 is read, bit 1 is write. */
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typedef enum {
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IOMMU_NONE = 0,
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IOMMU_RO = 1,
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IOMMU_WO = 2,
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IOMMU_RW = 3,
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} IOMMUAccessFlags;
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#define IOMMU_ACCESS_FLAG(r, w) (((r) ? IOMMU_RO : 0) | ((w) ? IOMMU_WO : 0))
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struct IOMMUTLBEntry {
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AddressSpace *target_as;
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hwaddr iova;
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hwaddr translated_addr;
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hwaddr addr_mask; /* 0xfff = 4k translation */
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IOMMUAccessFlags perm;
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};
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/*
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* Bitmap for different IOMMUNotifier capabilities. Each notifier can
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* register with one or multiple IOMMU Notifier capability bit(s).
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*/
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typedef enum {
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IOMMU_NOTIFIER_NONE = 0,
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/* Notify cache invalidations */
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IOMMU_NOTIFIER_UNMAP = 0x1,
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/* Notify entry changes (newly created entries) */
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IOMMU_NOTIFIER_MAP = 0x2,
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} IOMMUNotifierFlag;
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#define IOMMU_NOTIFIER_ALL (IOMMU_NOTIFIER_MAP | IOMMU_NOTIFIER_UNMAP)
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struct IOMMUNotifier;
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typedef void (*IOMMUNotify)(struct IOMMUNotifier *notifier,
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IOMMUTLBEntry *data);
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struct IOMMUNotifier {
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IOMMUNotify notify;
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IOMMUNotifierFlag notifier_flags;
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/* Notify for address space range start <= addr <= end */
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hwaddr start;
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hwaddr end;
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QLIST_ENTRY(IOMMUNotifier) node;
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};
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typedef struct IOMMUNotifier IOMMUNotifier;
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static inline void iommu_notifier_init(IOMMUNotifier *n, IOMMUNotify fn,
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IOMMUNotifierFlag flags,
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hwaddr start, hwaddr end)
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{
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n->notify = fn;
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n->notifier_flags = flags;
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n->start = start;
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n->end = end;
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}
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/*
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* Memory region callbacks
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*/
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struct MemoryRegionOps {
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/* Read from the memory region. @addr is relative to @mr; @size is
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* in bytes. */
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uint64_t (*read)(void *opaque,
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hwaddr addr,
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unsigned size);
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/* Write to the memory region. @addr is relative to @mr; @size is
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* in bytes. */
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void (*write)(void *opaque,
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hwaddr addr,
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uint64_t data,
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unsigned size);
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MemTxResult (*read_with_attrs)(void *opaque,
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hwaddr addr,
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uint64_t *data,
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unsigned size,
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MemTxAttrs attrs);
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MemTxResult (*write_with_attrs)(void *opaque,
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hwaddr addr,
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uint64_t data,
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unsigned size,
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MemTxAttrs attrs);
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/* Instruction execution pre-callback:
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* @addr is the address of the access relative to the @mr.
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* @size is the size of the area returned by the callback.
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* @offset is the location of the pointer inside @mr.
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*
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* Returns a pointer to a location which contains guest code.
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*/
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void *(*request_ptr)(void *opaque, hwaddr addr, unsigned *size,
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unsigned *offset);
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enum device_endian endianness;
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/* Guest-visible constraints: */
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struct {
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/* If nonzero, specify bounds on access sizes beyond which a machine
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* check is thrown.
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*/
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unsigned min_access_size;
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unsigned max_access_size;
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/* If true, unaligned accesses are supported. Otherwise unaligned
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* accesses throw machine checks.
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*/
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bool unaligned;
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/*
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* If present, and returns #false, the transaction is not accepted
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* by the device (and results in machine dependent behaviour such
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* as a machine check exception).
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*/
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bool (*accepts)(void *opaque, hwaddr addr,
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unsigned size, bool is_write);
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} valid;
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/* Internal implementation constraints: */
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struct {
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/* If nonzero, specifies the minimum size implemented. Smaller sizes
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* will be rounded upwards and a partial result will be returned.
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*/
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unsigned min_access_size;
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/* If nonzero, specifies the maximum size implemented. Larger sizes
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* will be done as a series of accesses with smaller sizes.
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*/
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unsigned max_access_size;
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/* If true, unaligned accesses are supported. Otherwise all accesses
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* are converted to (possibly multiple) naturally aligned accesses.
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*/
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bool unaligned;
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} impl;
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/* If .read and .write are not present, old_mmio may be used for
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* backwards compatibility with old mmio registration
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*/
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const MemoryRegionMmio old_mmio;
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};
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enum IOMMUMemoryRegionAttr {
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IOMMU_ATTR_SPAPR_TCE_FD
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};
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typedef struct IOMMUMemoryRegionClass {
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/* private */
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struct DeviceClass parent_class;
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/*
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* Return a TLB entry that contains a given address. Flag should
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* be the access permission of this translation operation. We can
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* set flag to IOMMU_NONE to mean that we don't need any
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* read/write permission checks, like, when for region replay.
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*/
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IOMMUTLBEntry (*translate)(IOMMUMemoryRegion *iommu, hwaddr addr,
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IOMMUAccessFlags flag);
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/* Returns minimum supported page size */
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uint64_t (*get_min_page_size)(IOMMUMemoryRegion *iommu);
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/* Called when IOMMU Notifier flag changed */
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void (*notify_flag_changed)(IOMMUMemoryRegion *iommu,
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IOMMUNotifierFlag old_flags,
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IOMMUNotifierFlag new_flags);
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/* Set this up to provide customized IOMMU replay function */
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void (*replay)(IOMMUMemoryRegion *iommu, IOMMUNotifier *notifier);
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/* Get IOMMU misc attributes */
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int (*get_attr)(IOMMUMemoryRegion *iommu, enum IOMMUMemoryRegionAttr,
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void *data);
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} IOMMUMemoryRegionClass;
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typedef struct CoalescedMemoryRange CoalescedMemoryRange;
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typedef struct MemoryRegionIoeventfd MemoryRegionIoeventfd;
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struct MemoryRegion {
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Object parent_obj;
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/* All fields are private - violators will be prosecuted */
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/* The following fields should fit in a cache line */
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bool romd_mode;
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bool ram;
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bool subpage;
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bool readonly; /* For RAM regions */
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bool rom_device;
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bool flush_coalesced_mmio;
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bool global_locking;
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uint8_t dirty_log_mask;
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bool is_iommu;
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RAMBlock *ram_block;
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Object *owner;
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const MemoryRegionOps *ops;
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void *opaque;
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MemoryRegion *container;
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Int128 size;
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hwaddr addr;
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void (*destructor)(MemoryRegion *mr);
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uint64_t align;
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bool terminates;
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bool ram_device;
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bool enabled;
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bool warning_printed; /* For reservations */
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uint8_t vga_logging_count;
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MemoryRegion *alias;
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hwaddr alias_offset;
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int32_t priority;
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QTAILQ_HEAD(subregions, MemoryRegion) subregions;
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QTAILQ_ENTRY(MemoryRegion) subregions_link;
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QTAILQ_HEAD(coalesced_ranges, CoalescedMemoryRange) coalesced;
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const char *name;
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unsigned ioeventfd_nb;
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MemoryRegionIoeventfd *ioeventfds;
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};
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struct IOMMUMemoryRegion {
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MemoryRegion parent_obj;
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QLIST_HEAD(, IOMMUNotifier) iommu_notify;
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IOMMUNotifierFlag iommu_notify_flags;
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};
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#define IOMMU_NOTIFIER_FOREACH(n, mr) \
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QLIST_FOREACH((n), &(mr)->iommu_notify, node)
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/**
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* MemoryListener: callbacks structure for updates to the physical memory map
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*
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* Allows a component to adjust to changes in the guest-visible memory map.
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* Use with memory_listener_register() and memory_listener_unregister().
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*/
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struct MemoryListener {
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void (*begin)(MemoryListener *listener);
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void (*commit)(MemoryListener *listener);
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void (*region_add)(MemoryListener *listener, MemoryRegionSection *section);
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void (*region_del)(MemoryListener *listener, MemoryRegionSection *section);
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void (*region_nop)(MemoryListener *listener, MemoryRegionSection *section);
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void (*log_start)(MemoryListener *listener, MemoryRegionSection *section,
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int old, int new);
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void (*log_stop)(MemoryListener *listener, MemoryRegionSection *section,
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int old, int new);
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void (*log_sync)(MemoryListener *listener, MemoryRegionSection *section);
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void (*log_global_start)(MemoryListener *listener);
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void (*log_global_stop)(MemoryListener *listener);
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void (*eventfd_add)(MemoryListener *listener, MemoryRegionSection *section,
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bool match_data, uint64_t data, EventNotifier *e);
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void (*eventfd_del)(MemoryListener *listener, MemoryRegionSection *section,
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bool match_data, uint64_t data, EventNotifier *e);
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void (*coalesced_mmio_add)(MemoryListener *listener, MemoryRegionSection *section,
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hwaddr addr, hwaddr len);
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void (*coalesced_mmio_del)(MemoryListener *listener, MemoryRegionSection *section,
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hwaddr addr, hwaddr len);
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/* Lower = earlier (during add), later (during del) */
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unsigned priority;
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AddressSpace *address_space;
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QTAILQ_ENTRY(MemoryListener) link;
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QTAILQ_ENTRY(MemoryListener) link_as;
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};
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/**
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* AddressSpace: describes a mapping of addresses to #MemoryRegion objects
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*/
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struct AddressSpace {
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/* All fields are private. */
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struct rcu_head rcu;
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char *name;
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MemoryRegion *root;
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/* Accessed via RCU. */
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struct FlatView *current_map;
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int ioeventfd_nb;
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struct MemoryRegionIoeventfd *ioeventfds;
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QTAILQ_HEAD(memory_listeners_as, MemoryListener) listeners;
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QTAILQ_ENTRY(AddressSpace) address_spaces_link;
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};
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FlatView *address_space_to_flatview(AddressSpace *as);
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/**
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* MemoryRegionSection: describes a fragment of a #MemoryRegion
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*
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* @mr: the region, or %NULL if empty
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* @fv: the flat view of the address space the region is mapped in
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* @offset_within_region: the beginning of the section, relative to @mr's start
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* @size: the size of the section; will not exceed @mr's boundaries
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* @offset_within_address_space: the address of the first byte of the section
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* relative to the region's address space
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* @readonly: writes to this section are ignored
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*/
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struct MemoryRegionSection {
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MemoryRegion *mr;
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FlatView *fv;
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hwaddr offset_within_region;
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Int128 size;
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hwaddr offset_within_address_space;
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bool readonly;
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};
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/**
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* memory_region_init: Initialize a memory region
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*
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* The region typically acts as a container for other memory regions. Use
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* memory_region_add_subregion() to add subregions.
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*
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* @mr: the #MemoryRegion to be initialized
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* @owner: the object that tracks the region's reference count
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* @name: used for debugging; not visible to the user or ABI
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* @size: size of the region; any subregions beyond this size will be clipped
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*/
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void memory_region_init(MemoryRegion *mr,
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struct Object *owner,
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const char *name,
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uint64_t size);
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/**
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* memory_region_ref: Add 1 to a memory region's reference count
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*
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* Whenever memory regions are accessed outside the BQL, they need to be
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* preserved against hot-unplug. MemoryRegions actually do not have their
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* own reference count; they piggyback on a QOM object, their "owner".
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* This function adds a reference to the owner.
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*
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* All MemoryRegions must have an owner if they can disappear, even if the
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* device they belong to operates exclusively under the BQL. This is because
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* the region could be returned at any time by memory_region_find, and this
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* is usually under guest control.
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*
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* @mr: the #MemoryRegion
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*/
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void memory_region_ref(MemoryRegion *mr);
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/**
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* memory_region_unref: Remove 1 to a memory region's reference count
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*
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* Whenever memory regions are accessed outside the BQL, they need to be
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* preserved against hot-unplug. MemoryRegions actually do not have their
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* own reference count; they piggyback on a QOM object, their "owner".
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* This function removes a reference to the owner and possibly destroys it.
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*
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* @mr: the #MemoryRegion
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*/
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void memory_region_unref(MemoryRegion *mr);
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/**
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* memory_region_init_io: Initialize an I/O memory region.
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*
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* Accesses into the region will cause the callbacks in @ops to be called.
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* if @size is nonzero, subregions will be clipped to @size.
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*
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* @mr: the #MemoryRegion to be initialized.
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* @owner: the object that tracks the region's reference count
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* @ops: a structure containing read and write callbacks to be used when
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* I/O is performed on the region.
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* @opaque: passed to the read and write callbacks of the @ops structure.
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* @name: used for debugging; not visible to the user or ABI
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* @size: size of the region.
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*/
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void memory_region_init_io(MemoryRegion *mr,
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struct Object *owner,
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const MemoryRegionOps *ops,
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void *opaque,
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const char *name,
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uint64_t size);
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/**
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* memory_region_init_ram_nomigrate: Initialize RAM memory region. Accesses
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* into the region will modify memory
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* directly.
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*
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* @mr: the #MemoryRegion to be initialized.
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* @owner: the object that tracks the region's reference count
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* @name: Region name, becomes part of RAMBlock name used in migration stream
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* must be unique within any device
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* @size: size of the region.
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* @errp: pointer to Error*, to store an error if it happens.
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*
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* Note that this function does not do anything to cause the data in the
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* RAM memory region to be migrated; that is the responsibility of the caller.
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*/
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void memory_region_init_ram_nomigrate(MemoryRegion *mr,
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struct Object *owner,
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const char *name,
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uint64_t size,
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Error **errp);
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/**
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* memory_region_init_resizeable_ram: Initialize memory region with resizeable
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* RAM. Accesses into the region will
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* modify memory directly. Only an initial
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* portion of this RAM is actually used.
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* The used size can change across reboots.
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*
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* @mr: the #MemoryRegion to be initialized.
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* @owner: the object that tracks the region's reference count
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* @name: Region name, becomes part of RAMBlock name used in migration stream
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* must be unique within any device
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* @size: used size of the region.
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* @max_size: max size of the region.
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* @resized: callback to notify owner about used size change.
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* @errp: pointer to Error*, to store an error if it happens.
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*
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* Note that this function does not do anything to cause the data in the
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* RAM memory region to be migrated; that is the responsibility of the caller.
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*/
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void memory_region_init_resizeable_ram(MemoryRegion *mr,
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struct Object *owner,
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const char *name,
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uint64_t size,
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uint64_t max_size,
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void (*resized)(const char*,
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uint64_t length,
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void *host),
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Error **errp);
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#ifdef __linux__
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/**
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* memory_region_init_ram_from_file: Initialize RAM memory region with a
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* mmap-ed backend.
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*
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* @mr: the #MemoryRegion to be initialized.
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* @owner: the object that tracks the region's reference count
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* @name: Region name, becomes part of RAMBlock name used in migration stream
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* must be unique within any device
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* @size: size of the region.
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* @align: alignment of the region base address; if 0, the default alignment
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* (getpagesize()) will be used.
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* @share: %true if memory must be mmaped with the MAP_SHARED flag
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* @path: the path in which to allocate the RAM.
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* @errp: pointer to Error*, to store an error if it happens.
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*
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* Note that this function does not do anything to cause the data in the
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* RAM memory region to be migrated; that is the responsibility of the caller.
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*/
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void memory_region_init_ram_from_file(MemoryRegion *mr,
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struct Object *owner,
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const char *name,
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uint64_t size,
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uint64_t align,
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bool share,
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const char *path,
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Error **errp);
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/**
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* memory_region_init_ram_from_fd: Initialize RAM memory region with a
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* mmap-ed backend.
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*
|
|
* @mr: the #MemoryRegion to be initialized.
|
|
* @owner: the object that tracks the region's reference count
|
|
* @name: the name of the region.
|
|
* @size: size of the region.
|
|
* @share: %true if memory must be mmaped with the MAP_SHARED flag
|
|
* @fd: the fd to mmap.
|
|
* @errp: pointer to Error*, to store an error if it happens.
|
|
*
|
|
* Note that this function does not do anything to cause the data in the
|
|
* RAM memory region to be migrated; that is the responsibility of the caller.
|
|
*/
|
|
void memory_region_init_ram_from_fd(MemoryRegion *mr,
|
|
struct Object *owner,
|
|
const char *name,
|
|
uint64_t size,
|
|
bool share,
|
|
int fd,
|
|
Error **errp);
|
|
#endif
|
|
|
|
/**
|
|
* memory_region_init_ram_ptr: Initialize RAM memory region from a
|
|
* user-provided pointer. Accesses into the
|
|
* region will modify memory directly.
|
|
*
|
|
* @mr: the #MemoryRegion to be initialized.
|
|
* @owner: the object that tracks the region's reference count
|
|
* @name: Region name, becomes part of RAMBlock name used in migration stream
|
|
* must be unique within any device
|
|
* @size: size of the region.
|
|
* @ptr: memory to be mapped; must contain at least @size bytes.
|
|
*
|
|
* Note that this function does not do anything to cause the data in the
|
|
* RAM memory region to be migrated; that is the responsibility of the caller.
|
|
*/
|
|
void memory_region_init_ram_ptr(MemoryRegion *mr,
|
|
struct Object *owner,
|
|
const char *name,
|
|
uint64_t size,
|
|
void *ptr);
|
|
|
|
/**
|
|
* memory_region_init_ram_device_ptr: Initialize RAM device memory region from
|
|
* a user-provided pointer.
|
|
*
|
|
* A RAM device represents a mapping to a physical device, such as to a PCI
|
|
* MMIO BAR of an vfio-pci assigned device. The memory region may be mapped
|
|
* into the VM address space and access to the region will modify memory
|
|
* directly. However, the memory region should not be included in a memory
|
|
* dump (device may not be enabled/mapped at the time of the dump), and
|
|
* operations incompatible with manipulating MMIO should be avoided. Replaces
|
|
* skip_dump flag.
|
|
*
|
|
* @mr: the #MemoryRegion to be initialized.
|
|
* @owner: the object that tracks the region's reference count
|
|
* @name: the name of the region.
|
|
* @size: size of the region.
|
|
* @ptr: memory to be mapped; must contain at least @size bytes.
|
|
*
|
|
* Note that this function does not do anything to cause the data in the
|
|
* RAM memory region to be migrated; that is the responsibility of the caller.
|
|
* (For RAM device memory regions, migrating the contents rarely makes sense.)
|
|
*/
|
|
void memory_region_init_ram_device_ptr(MemoryRegion *mr,
|
|
struct Object *owner,
|
|
const char *name,
|
|
uint64_t size,
|
|
void *ptr);
|
|
|
|
/**
|
|
* memory_region_init_alias: Initialize a memory region that aliases all or a
|
|
* part of another memory region.
|
|
*
|
|
* @mr: the #MemoryRegion to be initialized.
|
|
* @owner: the object that tracks the region's reference count
|
|
* @name: used for debugging; not visible to the user or ABI
|
|
* @orig: the region to be referenced; @mr will be equivalent to
|
|
* @orig between @offset and @offset + @size - 1.
|
|
* @offset: start of the section in @orig to be referenced.
|
|
* @size: size of the region.
|
|
*/
|
|
void memory_region_init_alias(MemoryRegion *mr,
|
|
struct Object *owner,
|
|
const char *name,
|
|
MemoryRegion *orig,
|
|
hwaddr offset,
|
|
uint64_t size);
|
|
|
|
/**
|
|
* memory_region_init_rom_nomigrate: Initialize a ROM memory region.
|
|
*
|
|
* This has the same effect as calling memory_region_init_ram_nomigrate()
|
|
* and then marking the resulting region read-only with
|
|
* memory_region_set_readonly().
|
|
*
|
|
* Note that this function does not do anything to cause the data in the
|
|
* RAM side of the memory region to be migrated; that is the responsibility
|
|
* of the caller.
|
|
*
|
|
* @mr: the #MemoryRegion to be initialized.
|
|
* @owner: the object that tracks the region's reference count
|
|
* @name: Region name, becomes part of RAMBlock name used in migration stream
|
|
* must be unique within any device
|
|
* @size: size of the region.
|
|
* @errp: pointer to Error*, to store an error if it happens.
|
|
*/
|
|
void memory_region_init_rom_nomigrate(MemoryRegion *mr,
|
|
struct Object *owner,
|
|
const char *name,
|
|
uint64_t size,
|
|
Error **errp);
|
|
|
|
/**
|
|
* memory_region_init_rom_device_nomigrate: Initialize a ROM memory region.
|
|
* Writes are handled via callbacks.
|
|
*
|
|
* Note that this function does not do anything to cause the data in the
|
|
* RAM side of the memory region to be migrated; that is the responsibility
|
|
* of the caller.
|
|
*
|
|
* @mr: the #MemoryRegion to be initialized.
|
|
* @owner: the object that tracks the region's reference count
|
|
* @ops: callbacks for write access handling (must not be NULL).
|
|
* @opaque: passed to the read and write callbacks of the @ops structure.
|
|
* @name: Region name, becomes part of RAMBlock name used in migration stream
|
|
* must be unique within any device
|
|
* @size: size of the region.
|
|
* @errp: pointer to Error*, to store an error if it happens.
|
|
*/
|
|
void memory_region_init_rom_device_nomigrate(MemoryRegion *mr,
|
|
struct Object *owner,
|
|
const MemoryRegionOps *ops,
|
|
void *opaque,
|
|
const char *name,
|
|
uint64_t size,
|
|
Error **errp);
|
|
|
|
/**
|
|
* memory_region_init_reservation: Initialize a memory region that reserves
|
|
* I/O space.
|
|
*
|
|
* A reservation region primariy serves debugging purposes. It claims I/O
|
|
* space that is not supposed to be handled by QEMU itself. Any access via
|
|
* the memory API will cause an abort().
|
|
* This function is deprecated. Use memory_region_init_io() with NULL
|
|
* callbacks instead.
|
|
*
|
|
* @mr: the #MemoryRegion to be initialized
|
|
* @owner: the object that tracks the region's reference count
|
|
* @name: used for debugging; not visible to the user or ABI
|
|
* @size: size of the region.
|
|
*/
|
|
static inline void memory_region_init_reservation(MemoryRegion *mr,
|
|
Object *owner,
|
|
const char *name,
|
|
uint64_t size)
|
|
{
|
|
memory_region_init_io(mr, owner, NULL, mr, name, size);
|
|
}
|
|
|
|
/**
|
|
* 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
|
|
* @instance_size: the IOMMUMemoryRegion subclass instance size
|
|
* @mrtypename: the type name of the #IOMMUMemoryRegion
|
|
* @owner: the object that tracks the region's reference count
|
|
* @name: used for debugging; not visible to the user or ABI
|
|
* @size: size of the region.
|
|
*/
|
|
void memory_region_init_iommu(void *_iommu_mr,
|
|
size_t instance_size,
|
|
const char *mrtypename,
|
|
Object *owner,
|
|
const char *name,
|
|
uint64_t size);
|
|
|
|
/**
|
|
* memory_region_init_ram - Initialize RAM memory region. Accesses into the
|
|
* region will modify memory directly.
|
|
*
|
|
* @mr: the #MemoryRegion to be initialized
|
|
* @owner: the object that tracks the region's reference count (must be
|
|
* TYPE_DEVICE or a subclass of TYPE_DEVICE, or NULL)
|
|
* @name: name of the memory region
|
|
* @size: size of the region in bytes
|
|
* @errp: pointer to Error*, to store an error if it happens.
|
|
*
|
|
* This function allocates RAM for a board model or device, and
|
|
* arranges for it to be migrated (by calling vmstate_register_ram()
|
|
* if @owner is a DeviceState, or vmstate_register_ram_global() if
|
|
* @owner is NULL).
|
|
*
|
|
* TODO: Currently we restrict @owner to being either NULL (for
|
|
* global RAM regions with no owner) or devices, so that we can
|
|
* give the RAM block a unique name for migration purposes.
|
|
* We should lift this restriction and allow arbitrary Objects.
|
|
* If you pass a non-NULL non-device @owner then we will assert.
|
|
*/
|
|
void memory_region_init_ram(MemoryRegion *mr,
|
|
struct Object *owner,
|
|
const char *name,
|
|
uint64_t size,
|
|
Error **errp);
|
|
|
|
/**
|
|
* memory_region_init_rom: Initialize a ROM memory region.
|
|
*
|
|
* This has the same effect as calling memory_region_init_ram()
|
|
* and then marking the resulting region read-only with
|
|
* memory_region_set_readonly(). This includes arranging for the
|
|
* contents to be migrated.
|
|
*
|
|
* TODO: Currently we restrict @owner to being either NULL (for
|
|
* global RAM regions with no owner) or devices, so that we can
|
|
* give the RAM block a unique name for migration purposes.
|
|
* We should lift this restriction and allow arbitrary Objects.
|
|
* If you pass a non-NULL non-device @owner then we will assert.
|
|
*
|
|
* @mr: the #MemoryRegion to be initialized.
|
|
* @owner: the object that tracks the region's reference count
|
|
* @name: Region name, becomes part of RAMBlock name used in migration stream
|
|
* must be unique within any device
|
|
* @size: size of the region.
|
|
* @errp: pointer to Error*, to store an error if it happens.
|
|
*/
|
|
void memory_region_init_rom(MemoryRegion *mr,
|
|
struct Object *owner,
|
|
const char *name,
|
|
uint64_t size,
|
|
Error **errp);
|
|
|
|
/**
|
|
* memory_region_init_rom_device: Initialize a ROM memory region.
|
|
* Writes are handled via callbacks.
|
|
*
|
|
* This function initializes a memory region backed by RAM for reads
|
|
* and callbacks for writes, and arranges for the RAM backing to
|
|
* be migrated (by calling vmstate_register_ram()
|
|
* if @owner is a DeviceState, or vmstate_register_ram_global() if
|
|
* @owner is NULL).
|
|
*
|
|
* TODO: Currently we restrict @owner to being either NULL (for
|
|
* global RAM regions with no owner) or devices, so that we can
|
|
* give the RAM block a unique name for migration purposes.
|
|
* We should lift this restriction and allow arbitrary Objects.
|
|
* If you pass a non-NULL non-device @owner then we will assert.
|
|
*
|
|
* @mr: the #MemoryRegion to be initialized.
|
|
* @owner: the object that tracks the region's reference count
|
|
* @ops: callbacks for write access handling (must not be NULL).
|
|
* @name: Region name, becomes part of RAMBlock name used in migration stream
|
|
* must be unique within any device
|
|
* @size: size of the region.
|
|
* @errp: pointer to Error*, to store an error if it happens.
|
|
*/
|
|
void memory_region_init_rom_device(MemoryRegion *mr,
|
|
struct Object *owner,
|
|
const MemoryRegionOps *ops,
|
|
void *opaque,
|
|
const char *name,
|
|
uint64_t size,
|
|
Error **errp);
|
|
|
|
|
|
/**
|
|
* memory_region_owner: get a memory region's owner.
|
|
*
|
|
* @mr: the memory region being queried.
|
|
*/
|
|
struct Object *memory_region_owner(MemoryRegion *mr);
|
|
|
|
/**
|
|
* memory_region_size: get a memory region's size.
|
|
*
|
|
* @mr: the memory region being queried.
|
|
*/
|
|
uint64_t memory_region_size(MemoryRegion *mr);
|
|
|
|
/**
|
|
* memory_region_is_ram: check whether a memory region is random access
|
|
*
|
|
* Returns %true is a memory region is random access.
|
|
*
|
|
* @mr: the memory region being queried
|
|
*/
|
|
static inline bool memory_region_is_ram(MemoryRegion *mr)
|
|
{
|
|
return mr->ram;
|
|
}
|
|
|
|
/**
|
|
* memory_region_is_ram_device: check whether a memory region is a ram device
|
|
*
|
|
* Returns %true is a memory region is a device backed ram region
|
|
*
|
|
* @mr: the memory region being queried
|
|
*/
|
|
bool memory_region_is_ram_device(MemoryRegion *mr);
|
|
|
|
/**
|
|
* memory_region_is_romd: check whether a memory region is in ROMD mode
|
|
*
|
|
* Returns %true if a memory region is a ROM device and currently set to allow
|
|
* direct reads.
|
|
*
|
|
* @mr: the memory region being queried
|
|
*/
|
|
static inline bool memory_region_is_romd(MemoryRegion *mr)
|
|
{
|
|
return mr->rom_device && mr->romd_mode;
|
|
}
|
|
|
|
/**
|
|
* memory_region_get_iommu: check whether a memory region is an iommu
|
|
*
|
|
* Returns pointer to IOMMUMemoryRegion if a memory region is an iommu,
|
|
* otherwise NULL.
|
|
*
|
|
* @mr: the memory region being queried
|
|
*/
|
|
static inline IOMMUMemoryRegion *memory_region_get_iommu(MemoryRegion *mr)
|
|
{
|
|
if (mr->alias) {
|
|
return memory_region_get_iommu(mr->alias);
|
|
}
|
|
if (mr->is_iommu) {
|
|
return (IOMMUMemoryRegion *) mr;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* memory_region_get_iommu_class_nocheck: returns iommu memory region class
|
|
* if an iommu or NULL if not
|
|
*
|
|
* Returns pointer to IOMMUMemoryRegionClass if a memory region is an iommu,
|
|
* otherwise NULL. This is fast path avoiding 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)
|
|
|
|
/**
|
|
* memory_region_iommu_get_min_page_size: get minimum supported page size
|
|
* for an iommu
|
|
*
|
|
* Returns minimum supported page size for an iommu.
|
|
*
|
|
* @iommu_mr: the memory region being queried
|
|
*/
|
|
uint64_t memory_region_iommu_get_min_page_size(IOMMUMemoryRegion *iommu_mr);
|
|
|
|
/**
|
|
* memory_region_notify_iommu: notify a change in an IOMMU translation entry.
|
|
*
|
|
* The notification type will be decided by entry.perm bits:
|
|
*
|
|
* - For UNMAP (cache invalidation) notifies: set entry.perm to IOMMU_NONE.
|
|
* - For MAP (newly added entry) notifies: set entry.perm to the
|
|
* permission of the page (which is definitely !IOMMU_NONE).
|
|
*
|
|
* Note: for any IOMMU implementation, an in-place mapping change
|
|
* should be notified with an UNMAP followed by a MAP.
|
|
*
|
|
* @iommu_mr: the memory region that was changed
|
|
* @entry: the new entry in the IOMMU translation table. The entry
|
|
* replaces all old entries for the same virtual I/O address range.
|
|
* Deleted entries have .@perm == 0.
|
|
*/
|
|
void memory_region_notify_iommu(IOMMUMemoryRegion *iommu_mr,
|
|
IOMMUTLBEntry entry);
|
|
|
|
/**
|
|
* memory_region_notify_one: notify a change in an IOMMU translation
|
|
* entry to a single notifier
|
|
*
|
|
* This works just like memory_region_notify_iommu(), but it only
|
|
* notifies a specific notifier, not all of them.
|
|
*
|
|
* @notifier: the notifier to be notified
|
|
* @entry: the new entry in the IOMMU translation table. The entry
|
|
* replaces all old entries for the same virtual I/O address range.
|
|
* Deleted entries have .@perm == 0.
|
|
*/
|
|
void memory_region_notify_one(IOMMUNotifier *notifier,
|
|
IOMMUTLBEntry *entry);
|
|
|
|
/**
|
|
* memory_region_register_iommu_notifier: register a notifier for changes to
|
|
* IOMMU translation entries.
|
|
*
|
|
* @mr: the memory region to observe
|
|
* @n: the IOMMUNotifier to be added; the notify callback receives a
|
|
* pointer to an #IOMMUTLBEntry as the opaque value; the pointer
|
|
* ceases to be valid on exit from the notifier.
|
|
*/
|
|
void memory_region_register_iommu_notifier(MemoryRegion *mr,
|
|
IOMMUNotifier *n);
|
|
|
|
/**
|
|
* memory_region_iommu_replay: replay existing IOMMU translations to
|
|
* a notifier with the minimum page granularity returned by
|
|
* mr->iommu_ops->get_page_size().
|
|
*
|
|
* @iommu_mr: the memory region to observe
|
|
* @n: the notifier to which to replay iommu mappings
|
|
*/
|
|
void memory_region_iommu_replay(IOMMUMemoryRegion *iommu_mr, IOMMUNotifier *n);
|
|
|
|
/**
|
|
* memory_region_iommu_replay_all: replay existing IOMMU translations
|
|
* to all the notifiers registered.
|
|
*
|
|
* @iommu_mr: the memory region to observe
|
|
*/
|
|
void memory_region_iommu_replay_all(IOMMUMemoryRegion *iommu_mr);
|
|
|
|
/**
|
|
* memory_region_unregister_iommu_notifier: unregister a notifier for
|
|
* changes to IOMMU translation entries.
|
|
*
|
|
* @mr: the memory region which was observed and for which notity_stopped()
|
|
* needs to be called
|
|
* @n: the notifier to be removed.
|
|
*/
|
|
void memory_region_unregister_iommu_notifier(MemoryRegion *mr,
|
|
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.
|
|
*
|
|
* @mr: the memory region being queried
|
|
*/
|
|
const char *memory_region_name(const MemoryRegion *mr);
|
|
|
|
/**
|
|
* memory_region_is_logging: return whether a memory region is logging writes
|
|
*
|
|
* Returns %true if the memory region is logging writes for the given client
|
|
*
|
|
* @mr: the memory region being queried
|
|
* @client: the client being queried
|
|
*/
|
|
bool memory_region_is_logging(MemoryRegion *mr, uint8_t client);
|
|
|
|
/**
|
|
* memory_region_get_dirty_log_mask: return the clients for which a
|
|
* memory region is logging writes.
|
|
*
|
|
* Returns a bitmap of clients, in which the DIRTY_MEMORY_* constants
|
|
* are the bit indices.
|
|
*
|
|
* @mr: the memory region being queried
|
|
*/
|
|
uint8_t memory_region_get_dirty_log_mask(MemoryRegion *mr);
|
|
|
|
/**
|
|
* memory_region_is_rom: check whether a memory region is ROM
|
|
*
|
|
* Returns %true is a memory region is read-only memory.
|
|
*
|
|
* @mr: the memory region being queried
|
|
*/
|
|
static inline bool memory_region_is_rom(MemoryRegion *mr)
|
|
{
|
|
return mr->ram && mr->readonly;
|
|
}
|
|
|
|
|
|
/**
|
|
* memory_region_get_fd: Get a file descriptor backing a RAM memory region.
|
|
*
|
|
* Returns a file descriptor backing a file-based RAM memory region,
|
|
* or -1 if the region is not a file-based RAM memory region.
|
|
*
|
|
* @mr: the RAM or alias memory region being queried.
|
|
*/
|
|
int memory_region_get_fd(MemoryRegion *mr);
|
|
|
|
/**
|
|
* memory_region_from_host: Convert a pointer into a RAM memory region
|
|
* and an offset within it.
|
|
*
|
|
* Given a host pointer inside a RAM memory region (created with
|
|
* memory_region_init_ram() or memory_region_init_ram_ptr()), return
|
|
* the MemoryRegion and the offset within it.
|
|
*
|
|
* Use with care; by the time this function returns, the returned pointer is
|
|
* not protected by RCU anymore. If the caller is not within an RCU critical
|
|
* section and does not hold the iothread lock, it must have other means of
|
|
* protecting the pointer, such as a reference to the region that includes
|
|
* the incoming ram_addr_t.
|
|
*
|
|
* @ptr: the host pointer to be converted
|
|
* @offset: the offset within memory region
|
|
*/
|
|
MemoryRegion *memory_region_from_host(void *ptr, ram_addr_t *offset);
|
|
|
|
/**
|
|
* memory_region_get_ram_ptr: Get a pointer into a RAM memory region.
|
|
*
|
|
* Returns a host pointer to a RAM memory region (created with
|
|
* memory_region_init_ram() or memory_region_init_ram_ptr()).
|
|
*
|
|
* Use with care; by the time this function returns, the returned pointer is
|
|
* not protected by RCU anymore. If the caller is not within an RCU critical
|
|
* section and does not hold the iothread lock, it must have other means of
|
|
* protecting the pointer, such as a reference to the region that includes
|
|
* the incoming ram_addr_t.
|
|
*
|
|
* @mr: the memory region being queried.
|
|
*/
|
|
void *memory_region_get_ram_ptr(MemoryRegion *mr);
|
|
|
|
/* memory_region_ram_resize: Resize a RAM region.
|
|
*
|
|
* Only legal before guest might have detected the memory size: e.g. on
|
|
* incoming migration, or right after reset.
|
|
*
|
|
* @mr: a memory region created with @memory_region_init_resizeable_ram.
|
|
* @newsize: the new size the region
|
|
* @errp: pointer to Error*, to store an error if it happens.
|
|
*/
|
|
void memory_region_ram_resize(MemoryRegion *mr, ram_addr_t newsize,
|
|
Error **errp);
|
|
|
|
/**
|
|
* memory_region_set_log: Turn dirty logging on or off for a region.
|
|
*
|
|
* Turns dirty logging on or off for a specified client (display, migration).
|
|
* Only meaningful for RAM regions.
|
|
*
|
|
* @mr: the memory region being updated.
|
|
* @log: whether dirty logging is to be enabled or disabled.
|
|
* @client: the user of the logging information; %DIRTY_MEMORY_VGA only.
|
|
*/
|
|
void memory_region_set_log(MemoryRegion *mr, bool log, unsigned client);
|
|
|
|
/**
|
|
* memory_region_get_dirty: Check whether a range of bytes is dirty
|
|
* for a specified client.
|
|
*
|
|
* Checks whether a range of bytes has been written to since the last
|
|
* call to memory_region_reset_dirty() with the same @client. Dirty logging
|
|
* must be enabled.
|
|
*
|
|
* @mr: the memory region being queried.
|
|
* @addr: the address (relative to the start of the region) being queried.
|
|
* @size: the size of the range being queried.
|
|
* @client: the user of the logging information; %DIRTY_MEMORY_MIGRATION or
|
|
* %DIRTY_MEMORY_VGA.
|
|
*/
|
|
bool memory_region_get_dirty(MemoryRegion *mr, hwaddr addr,
|
|
hwaddr size, unsigned client);
|
|
|
|
/**
|
|
* memory_region_set_dirty: Mark a range of bytes as dirty in a memory region.
|
|
*
|
|
* Marks a range of bytes as dirty, after it has been dirtied outside
|
|
* guest code.
|
|
*
|
|
* @mr: the memory region being dirtied.
|
|
* @addr: the address (relative to the start of the region) being dirtied.
|
|
* @size: size of the range being dirtied.
|
|
*/
|
|
void memory_region_set_dirty(MemoryRegion *mr, hwaddr addr,
|
|
hwaddr size);
|
|
|
|
/**
|
|
* memory_region_snapshot_and_clear_dirty: Get a snapshot of the dirty
|
|
* bitmap and clear it.
|
|
*
|
|
* Creates a snapshot of the dirty bitmap, clears the dirty bitmap and
|
|
* returns the snapshot. The snapshot can then be used to query dirty
|
|
* status, using memory_region_snapshot_get_dirty. Snapshotting allows
|
|
* querying the same page multiple times, which is especially useful for
|
|
* display updates where the scanlines often are not page aligned.
|
|
*
|
|
* The dirty bitmap region which gets copyed into the snapshot (and
|
|
* cleared afterwards) can be larger than requested. The boundaries
|
|
* are rounded up/down so complete bitmap longs (covering 64 pages on
|
|
* 64bit hosts) can be copied over into the bitmap snapshot. Which
|
|
* isn't a problem for display updates as the extra pages are outside
|
|
* the visible area, and in case the visible area changes a full
|
|
* display redraw is due anyway. Should other use cases for this
|
|
* function emerge we might have to revisit this implementation
|
|
* detail.
|
|
*
|
|
* Use g_free to release DirtyBitmapSnapshot.
|
|
*
|
|
* @mr: the memory region being queried.
|
|
* @addr: the address (relative to the start of the region) being queried.
|
|
* @size: the size of the range being queried.
|
|
* @client: the user of the logging information; typically %DIRTY_MEMORY_VGA.
|
|
*/
|
|
DirtyBitmapSnapshot *memory_region_snapshot_and_clear_dirty(MemoryRegion *mr,
|
|
hwaddr addr,
|
|
hwaddr size,
|
|
unsigned client);
|
|
|
|
/**
|
|
* memory_region_snapshot_get_dirty: Check whether a range of bytes is dirty
|
|
* in the specified dirty bitmap snapshot.
|
|
*
|
|
* @mr: the memory region being queried.
|
|
* @snap: the dirty bitmap snapshot
|
|
* @addr: the address (relative to the start of the region) being queried.
|
|
* @size: the size of the range being queried.
|
|
*/
|
|
bool memory_region_snapshot_get_dirty(MemoryRegion *mr,
|
|
DirtyBitmapSnapshot *snap,
|
|
hwaddr addr, hwaddr size);
|
|
|
|
/**
|
|
* memory_region_reset_dirty: Mark a range of pages as clean, for a specified
|
|
* client.
|
|
*
|
|
* Marks a range of pages as no longer dirty.
|
|
*
|
|
* @mr: the region being updated.
|
|
* @addr: the start of the subrange being cleaned.
|
|
* @size: the size of the subrange being cleaned.
|
|
* @client: the user of the logging information; %DIRTY_MEMORY_MIGRATION or
|
|
* %DIRTY_MEMORY_VGA.
|
|
*/
|
|
void memory_region_reset_dirty(MemoryRegion *mr, hwaddr addr,
|
|
hwaddr size, unsigned client);
|
|
|
|
/**
|
|
* memory_region_set_readonly: Turn a memory region read-only (or read-write)
|
|
*
|
|
* Allows a memory region to be marked as read-only (turning it into a ROM).
|
|
* only useful on RAM regions.
|
|
*
|
|
* @mr: the region being updated.
|
|
* @readonly: whether rhe region is to be ROM or RAM.
|
|
*/
|
|
void memory_region_set_readonly(MemoryRegion *mr, bool readonly);
|
|
|
|
/**
|
|
* memory_region_rom_device_set_romd: enable/disable ROMD mode
|
|
*
|
|
* Allows a ROM device (initialized with memory_region_init_rom_device() to
|
|
* set to ROMD mode (default) or MMIO mode. When it is in ROMD mode, the
|
|
* device is mapped to guest memory and satisfies read access directly.
|
|
* When in MMIO mode, reads are forwarded to the #MemoryRegion.read function.
|
|
* Writes are always handled by the #MemoryRegion.write function.
|
|
*
|
|
* @mr: the memory region to be updated
|
|
* @romd_mode: %true to put the region into ROMD mode
|
|
*/
|
|
void memory_region_rom_device_set_romd(MemoryRegion *mr, bool romd_mode);
|
|
|
|
/**
|
|
* memory_region_set_coalescing: Enable memory coalescing for the region.
|
|
*
|
|
* Enabled writes to a region to be queued for later processing. MMIO ->write
|
|
* callbacks may be delayed until a non-coalesced MMIO is issued.
|
|
* Only useful for IO regions. Roughly similar to write-combining hardware.
|
|
*
|
|
* @mr: the memory region to be write coalesced
|
|
*/
|
|
void memory_region_set_coalescing(MemoryRegion *mr);
|
|
|
|
/**
|
|
* memory_region_add_coalescing: Enable memory coalescing for a sub-range of
|
|
* a region.
|
|
*
|
|
* Like memory_region_set_coalescing(), but works on a sub-range of a region.
|
|
* Multiple calls can be issued coalesced disjoint ranges.
|
|
*
|
|
* @mr: the memory region to be updated.
|
|
* @offset: the start of the range within the region to be coalesced.
|
|
* @size: the size of the subrange to be coalesced.
|
|
*/
|
|
void memory_region_add_coalescing(MemoryRegion *mr,
|
|
hwaddr offset,
|
|
uint64_t size);
|
|
|
|
/**
|
|
* memory_region_clear_coalescing: Disable MMIO coalescing for the region.
|
|
*
|
|
* Disables any coalescing caused by memory_region_set_coalescing() or
|
|
* memory_region_add_coalescing(). Roughly equivalent to uncacheble memory
|
|
* hardware.
|
|
*
|
|
* @mr: the memory region to be updated.
|
|
*/
|
|
void memory_region_clear_coalescing(MemoryRegion *mr);
|
|
|
|
/**
|
|
* memory_region_set_flush_coalesced: Enforce memory coalescing flush before
|
|
* accesses.
|
|
*
|
|
* Ensure that pending coalesced MMIO request are flushed before the memory
|
|
* region is accessed. This property is automatically enabled for all regions
|
|
* passed to memory_region_set_coalescing() and memory_region_add_coalescing().
|
|
*
|
|
* @mr: the memory region to be updated.
|
|
*/
|
|
void memory_region_set_flush_coalesced(MemoryRegion *mr);
|
|
|
|
/**
|
|
* memory_region_clear_flush_coalesced: Disable memory coalescing flush before
|
|
* accesses.
|
|
*
|
|
* Clear the automatic coalesced MMIO flushing enabled via
|
|
* memory_region_set_flush_coalesced. Note that this service has no effect on
|
|
* memory regions that have MMIO coalescing enabled for themselves. For them,
|
|
* automatic flushing will stop once coalescing is disabled.
|
|
*
|
|
* @mr: the memory region to be updated.
|
|
*/
|
|
void memory_region_clear_flush_coalesced(MemoryRegion *mr);
|
|
|
|
/**
|
|
* memory_region_clear_global_locking: Declares that access processing does
|
|
* not depend on the QEMU global lock.
|
|
*
|
|
* By clearing this property, accesses to the memory region will be processed
|
|
* outside of QEMU's global lock (unless the lock is held on when issuing the
|
|
* access request). In this case, the device model implementing the access
|
|
* handlers is responsible for synchronization of concurrency.
|
|
*
|
|
* @mr: the memory region to be updated.
|
|
*/
|
|
void memory_region_clear_global_locking(MemoryRegion *mr);
|
|
|
|
/**
|
|
* memory_region_add_eventfd: Request an eventfd to be triggered when a word
|
|
* is written to a location.
|
|
*
|
|
* Marks a word in an IO region (initialized with memory_region_init_io())
|
|
* as a trigger for an eventfd event. The I/O callback will not be called.
|
|
* The caller must be prepared to handle failure (that is, take the required
|
|
* action if the callback _is_ called).
|
|
*
|
|
* @mr: the memory region being updated.
|
|
* @addr: the address within @mr that is to be monitored
|
|
* @size: the size of the access to trigger the eventfd
|
|
* @match_data: whether to match against @data, instead of just @addr
|
|
* @data: the data to match against the guest write
|
|
* @e: event notifier to be triggered when @addr, @size, and @data all match.
|
|
**/
|
|
void memory_region_add_eventfd(MemoryRegion *mr,
|
|
hwaddr addr,
|
|
unsigned size,
|
|
bool match_data,
|
|
uint64_t data,
|
|
EventNotifier *e);
|
|
|
|
/**
|
|
* memory_region_del_eventfd: Cancel an eventfd.
|
|
*
|
|
* Cancels an eventfd trigger requested by a previous
|
|
* memory_region_add_eventfd() call.
|
|
*
|
|
* @mr: the memory region being updated.
|
|
* @addr: the address within @mr that is to be monitored
|
|
* @size: the size of the access to trigger the eventfd
|
|
* @match_data: whether to match against @data, instead of just @addr
|
|
* @data: the data to match against the guest write
|
|
* @e: event notifier to be triggered when @addr, @size, and @data all match.
|
|
*/
|
|
void memory_region_del_eventfd(MemoryRegion *mr,
|
|
hwaddr addr,
|
|
unsigned size,
|
|
bool match_data,
|
|
uint64_t data,
|
|
EventNotifier *e);
|
|
|
|
/**
|
|
* memory_region_add_subregion: Add a subregion to a container.
|
|
*
|
|
* Adds a subregion at @offset. The subregion may not overlap with other
|
|
* subregions (except for those explicitly marked as overlapping). A region
|
|
* may only be added once as a subregion (unless removed with
|
|
* memory_region_del_subregion()); use memory_region_init_alias() if you
|
|
* want a region to be a subregion in multiple locations.
|
|
*
|
|
* @mr: the region to contain the new subregion; must be a container
|
|
* initialized with memory_region_init().
|
|
* @offset: the offset relative to @mr where @subregion is added.
|
|
* @subregion: the subregion to be added.
|
|
*/
|
|
void memory_region_add_subregion(MemoryRegion *mr,
|
|
hwaddr offset,
|
|
MemoryRegion *subregion);
|
|
/**
|
|
* memory_region_add_subregion_overlap: Add a subregion to a container
|
|
* with overlap.
|
|
*
|
|
* Adds a subregion at @offset. The subregion may overlap with other
|
|
* subregions. Conflicts are resolved by having a higher @priority hide a
|
|
* lower @priority. Subregions without priority are taken as @priority 0.
|
|
* A region may only be added once as a subregion (unless removed with
|
|
* memory_region_del_subregion()); use memory_region_init_alias() if you
|
|
* want a region to be a subregion in multiple locations.
|
|
*
|
|
* @mr: the region to contain the new subregion; must be a container
|
|
* initialized with memory_region_init().
|
|
* @offset: the offset relative to @mr where @subregion is added.
|
|
* @subregion: the subregion to be added.
|
|
* @priority: used for resolving overlaps; highest priority wins.
|
|
*/
|
|
void memory_region_add_subregion_overlap(MemoryRegion *mr,
|
|
hwaddr offset,
|
|
MemoryRegion *subregion,
|
|
int priority);
|
|
|
|
/**
|
|
* memory_region_get_ram_addr: Get the ram address associated with a memory
|
|
* region
|
|
*/
|
|
ram_addr_t memory_region_get_ram_addr(MemoryRegion *mr);
|
|
|
|
uint64_t memory_region_get_alignment(const MemoryRegion *mr);
|
|
/**
|
|
* memory_region_del_subregion: Remove a subregion.
|
|
*
|
|
* Removes a subregion from its container.
|
|
*
|
|
* @mr: the container to be updated.
|
|
* @subregion: the region being removed; must be a current subregion of @mr.
|
|
*/
|
|
void memory_region_del_subregion(MemoryRegion *mr,
|
|
MemoryRegion *subregion);
|
|
|
|
/*
|
|
* memory_region_set_enabled: dynamically enable or disable a region
|
|
*
|
|
* Enables or disables a memory region. A disabled memory region
|
|
* ignores all accesses to itself and its subregions. It does not
|
|
* obscure sibling subregions with lower priority - it simply behaves as
|
|
* if it was removed from the hierarchy.
|
|
*
|
|
* Regions default to being enabled.
|
|
*
|
|
* @mr: the region to be updated
|
|
* @enabled: whether to enable or disable the region
|
|
*/
|
|
void memory_region_set_enabled(MemoryRegion *mr, bool enabled);
|
|
|
|
/*
|
|
* memory_region_set_address: dynamically update the address of a region
|
|
*
|
|
* Dynamically updates the address of a region, relative to its container.
|
|
* May be used on regions are currently part of a memory hierarchy.
|
|
*
|
|
* @mr: the region to be updated
|
|
* @addr: new address, relative to container region
|
|
*/
|
|
void memory_region_set_address(MemoryRegion *mr, hwaddr addr);
|
|
|
|
/*
|
|
* memory_region_set_size: dynamically update the size of a region.
|
|
*
|
|
* Dynamically updates the size of a region.
|
|
*
|
|
* @mr: the region to be updated
|
|
* @size: used size of the region.
|
|
*/
|
|
void memory_region_set_size(MemoryRegion *mr, uint64_t size);
|
|
|
|
/*
|
|
* memory_region_set_alias_offset: dynamically update a memory alias's offset
|
|
*
|
|
* Dynamically updates the offset into the target region that an alias points
|
|
* to, as if the fourth argument to memory_region_init_alias() has changed.
|
|
*
|
|
* @mr: the #MemoryRegion to be updated; should be an alias.
|
|
* @offset: the new offset into the target memory region
|
|
*/
|
|
void memory_region_set_alias_offset(MemoryRegion *mr,
|
|
hwaddr offset);
|
|
|
|
/**
|
|
* memory_region_present: checks if an address relative to a @container
|
|
* translates into #MemoryRegion within @container
|
|
*
|
|
* Answer whether a #MemoryRegion within @container covers the address
|
|
* @addr.
|
|
*
|
|
* @container: a #MemoryRegion within which @addr is a relative address
|
|
* @addr: the area within @container to be searched
|
|
*/
|
|
bool memory_region_present(MemoryRegion *container, hwaddr addr);
|
|
|
|
/**
|
|
* memory_region_is_mapped: returns true if #MemoryRegion is mapped
|
|
* into any address space.
|
|
*
|
|
* @mr: a #MemoryRegion which should be checked if it's mapped
|
|
*/
|
|
bool memory_region_is_mapped(MemoryRegion *mr);
|
|
|
|
/**
|
|
* memory_region_find: translate an address/size relative to a
|
|
* MemoryRegion into a #MemoryRegionSection.
|
|
*
|
|
* Locates the first #MemoryRegion within @mr that overlaps the range
|
|
* given by @addr and @size.
|
|
*
|
|
* Returns a #MemoryRegionSection that describes a contiguous overlap.
|
|
* It will have the following characteristics:
|
|
* .@size = 0 iff no overlap was found
|
|
* .@mr is non-%NULL iff an overlap was found
|
|
*
|
|
* Remember that in the return value the @offset_within_region is
|
|
* relative to the returned region (in the .@mr field), not to the
|
|
* @mr argument.
|
|
*
|
|
* Similarly, the .@offset_within_address_space is relative to the
|
|
* address space that contains both regions, the passed and the
|
|
* returned one. However, in the special case where the @mr argument
|
|
* has no container (and thus is the root of the address space), the
|
|
* following will hold:
|
|
* .@offset_within_address_space >= @addr
|
|
* .@offset_within_address_space + .@size <= @addr + @size
|
|
*
|
|
* @mr: a MemoryRegion within which @addr is a relative address
|
|
* @addr: start of the area within @as to be searched
|
|
* @size: size of the area to be searched
|
|
*/
|
|
MemoryRegionSection memory_region_find(MemoryRegion *mr,
|
|
hwaddr addr, uint64_t size);
|
|
|
|
/**
|
|
* memory_global_dirty_log_sync: synchronize the dirty log for all memory
|
|
*
|
|
* Synchronizes the dirty page log for all address spaces.
|
|
*/
|
|
void memory_global_dirty_log_sync(void);
|
|
|
|
/**
|
|
* memory_region_transaction_begin: Start a transaction.
|
|
*
|
|
* During a transaction, changes will be accumulated and made visible
|
|
* only when the transaction ends (is committed).
|
|
*/
|
|
void memory_region_transaction_begin(void);
|
|
|
|
/**
|
|
* memory_region_transaction_commit: Commit a transaction and make changes
|
|
* visible to the guest.
|
|
*/
|
|
void memory_region_transaction_commit(void);
|
|
|
|
/**
|
|
* memory_listener_register: register callbacks to be called when memory
|
|
* sections are mapped or unmapped into an address
|
|
* space
|
|
*
|
|
* @listener: an object containing the callbacks to be called
|
|
* @filter: if non-%NULL, only regions in this address space will be observed
|
|
*/
|
|
void memory_listener_register(MemoryListener *listener, AddressSpace *filter);
|
|
|
|
/**
|
|
* memory_listener_unregister: undo the effect of memory_listener_register()
|
|
*
|
|
* @listener: an object containing the callbacks to be removed
|
|
*/
|
|
void memory_listener_unregister(MemoryListener *listener);
|
|
|
|
/**
|
|
* memory_global_dirty_log_start: begin dirty logging for all regions
|
|
*/
|
|
void memory_global_dirty_log_start(void);
|
|
|
|
/**
|
|
* memory_global_dirty_log_stop: end dirty logging for all regions
|
|
*/
|
|
void memory_global_dirty_log_stop(void);
|
|
|
|
void mtree_info(fprintf_function mon_printf, void *f, bool flatview,
|
|
bool dispatch_tree);
|
|
|
|
/**
|
|
* memory_region_request_mmio_ptr: request a pointer to an mmio
|
|
* MemoryRegion. If it is possible map a RAM MemoryRegion with this pointer.
|
|
* When the device wants to invalidate the pointer it will call
|
|
* memory_region_invalidate_mmio_ptr.
|
|
*
|
|
* @mr: #MemoryRegion to check
|
|
* @addr: address within that region
|
|
*
|
|
* Returns true on success, false otherwise.
|
|
*/
|
|
bool memory_region_request_mmio_ptr(MemoryRegion *mr, hwaddr addr);
|
|
|
|
/**
|
|
* memory_region_invalidate_mmio_ptr: invalidate the pointer to an mmio
|
|
* previously requested.
|
|
* In the end that means that if something wants to execute from this area it
|
|
* will need to request the pointer again.
|
|
*
|
|
* @mr: #MemoryRegion associated to the pointer.
|
|
* @offset: offset within the memory region
|
|
* @size: size of that area.
|
|
*/
|
|
void memory_region_invalidate_mmio_ptr(MemoryRegion *mr, hwaddr offset,
|
|
unsigned size);
|
|
|
|
/**
|
|
* memory_region_dispatch_read: perform a read directly to the specified
|
|
* MemoryRegion.
|
|
*
|
|
* @mr: #MemoryRegion to access
|
|
* @addr: address within that region
|
|
* @pval: pointer to uint64_t which the data is written to
|
|
* @size: size of the access in bytes
|
|
* @attrs: memory transaction attributes to use for the access
|
|
*/
|
|
MemTxResult memory_region_dispatch_read(MemoryRegion *mr,
|
|
hwaddr addr,
|
|
uint64_t *pval,
|
|
unsigned size,
|
|
MemTxAttrs attrs);
|
|
/**
|
|
* memory_region_dispatch_write: perform a write directly to the specified
|
|
* MemoryRegion.
|
|
*
|
|
* @mr: #MemoryRegion to access
|
|
* @addr: address within that region
|
|
* @data: data to write
|
|
* @size: size of the access in bytes
|
|
* @attrs: memory transaction attributes to use for the access
|
|
*/
|
|
MemTxResult memory_region_dispatch_write(MemoryRegion *mr,
|
|
hwaddr addr,
|
|
uint64_t data,
|
|
unsigned size,
|
|
MemTxAttrs attrs);
|
|
|
|
/**
|
|
* address_space_init: initializes an address space
|
|
*
|
|
* @as: an uninitialized #AddressSpace
|
|
* @root: a #MemoryRegion that routes addresses for the address space
|
|
* @name: an address space name. The name is only used for debugging
|
|
* output.
|
|
*/
|
|
void address_space_init(AddressSpace *as, MemoryRegion *root, const char *name);
|
|
|
|
/**
|
|
* address_space_destroy: destroy an address space
|
|
*
|
|
* Releases all resources associated with an address space. After an address space
|
|
* is destroyed, its root memory region (given by address_space_init()) may be destroyed
|
|
* as well.
|
|
*
|
|
* @as: address space to be destroyed
|
|
*/
|
|
void address_space_destroy(AddressSpace *as);
|
|
|
|
/**
|
|
* address_space_rw: read from or write to an address space.
|
|
*
|
|
* Return a MemTxResult indicating whether the operation succeeded
|
|
* or failed (eg unassigned memory, device rejected the transaction,
|
|
* IOMMU fault).
|
|
*
|
|
* @as: #AddressSpace to be accessed
|
|
* @addr: address within that address space
|
|
* @attrs: memory transaction attributes
|
|
* @buf: buffer with the data transferred
|
|
* @len: the number of bytes to read or write
|
|
* @is_write: indicates the transfer direction
|
|
*/
|
|
MemTxResult address_space_rw(AddressSpace *as, hwaddr addr,
|
|
MemTxAttrs attrs, uint8_t *buf,
|
|
int len, bool is_write);
|
|
|
|
/**
|
|
* address_space_write: write to address space.
|
|
*
|
|
* Return a MemTxResult indicating whether the operation succeeded
|
|
* or failed (eg unassigned memory, device rejected the transaction,
|
|
* IOMMU fault).
|
|
*
|
|
* @as: #AddressSpace to be accessed
|
|
* @addr: address within that address space
|
|
* @attrs: memory transaction attributes
|
|
* @buf: buffer with the data transferred
|
|
* @len: the number of bytes to write
|
|
*/
|
|
MemTxResult address_space_write(AddressSpace *as, hwaddr addr,
|
|
MemTxAttrs attrs,
|
|
const uint8_t *buf, int len);
|
|
|
|
/* address_space_ld*: load from an address space
|
|
* address_space_st*: store to an address space
|
|
*
|
|
* These functions perform a load or store of the byte, word,
|
|
* longword or quad to the specified address within the AddressSpace.
|
|
* The _le suffixed functions treat the data as little endian;
|
|
* _be indicates big endian; no suffix indicates "same endianness
|
|
* as guest CPU".
|
|
*
|
|
* The "guest CPU endianness" accessors are deprecated for use outside
|
|
* target-* code; devices should be CPU-agnostic and use either the LE
|
|
* or the BE accessors.
|
|
*
|
|
* @as #AddressSpace to be accessed
|
|
* @addr: address within that address space
|
|
* @val: data value, for stores
|
|
* @attrs: memory transaction attributes
|
|
* @result: location to write the success/failure of the transaction;
|
|
* if NULL, this information is discarded
|
|
*/
|
|
uint32_t address_space_ldub(AddressSpace *as, hwaddr addr,
|
|
MemTxAttrs attrs, MemTxResult *result);
|
|
uint32_t address_space_lduw_le(AddressSpace *as, hwaddr addr,
|
|
MemTxAttrs attrs, MemTxResult *result);
|
|
uint32_t address_space_lduw_be(AddressSpace *as, hwaddr addr,
|
|
MemTxAttrs attrs, MemTxResult *result);
|
|
uint32_t address_space_ldl_le(AddressSpace *as, hwaddr addr,
|
|
MemTxAttrs attrs, MemTxResult *result);
|
|
uint32_t address_space_ldl_be(AddressSpace *as, hwaddr addr,
|
|
MemTxAttrs attrs, MemTxResult *result);
|
|
uint64_t address_space_ldq_le(AddressSpace *as, hwaddr addr,
|
|
MemTxAttrs attrs, MemTxResult *result);
|
|
uint64_t address_space_ldq_be(AddressSpace *as, hwaddr addr,
|
|
MemTxAttrs attrs, MemTxResult *result);
|
|
void address_space_stb(AddressSpace *as, hwaddr addr, uint32_t val,
|
|
MemTxAttrs attrs, MemTxResult *result);
|
|
void address_space_stw_le(AddressSpace *as, hwaddr addr, uint32_t val,
|
|
MemTxAttrs attrs, MemTxResult *result);
|
|
void address_space_stw_be(AddressSpace *as, hwaddr addr, uint32_t val,
|
|
MemTxAttrs attrs, MemTxResult *result);
|
|
void address_space_stl_le(AddressSpace *as, hwaddr addr, uint32_t val,
|
|
MemTxAttrs attrs, MemTxResult *result);
|
|
void address_space_stl_be(AddressSpace *as, hwaddr addr, uint32_t val,
|
|
MemTxAttrs attrs, MemTxResult *result);
|
|
void address_space_stq_le(AddressSpace *as, hwaddr addr, uint64_t val,
|
|
MemTxAttrs attrs, MemTxResult *result);
|
|
void address_space_stq_be(AddressSpace *as, hwaddr addr, uint64_t val,
|
|
MemTxAttrs attrs, MemTxResult *result);
|
|
|
|
uint32_t ldub_phys(AddressSpace *as, hwaddr addr);
|
|
uint32_t lduw_le_phys(AddressSpace *as, hwaddr addr);
|
|
uint32_t lduw_be_phys(AddressSpace *as, hwaddr addr);
|
|
uint32_t ldl_le_phys(AddressSpace *as, hwaddr addr);
|
|
uint32_t ldl_be_phys(AddressSpace *as, hwaddr addr);
|
|
uint64_t ldq_le_phys(AddressSpace *as, hwaddr addr);
|
|
uint64_t ldq_be_phys(AddressSpace *as, hwaddr addr);
|
|
void stb_phys(AddressSpace *as, hwaddr addr, uint32_t val);
|
|
void stw_le_phys(AddressSpace *as, hwaddr addr, uint32_t val);
|
|
void stw_be_phys(AddressSpace *as, hwaddr addr, uint32_t val);
|
|
void stl_le_phys(AddressSpace *as, hwaddr addr, uint32_t val);
|
|
void stl_be_phys(AddressSpace *as, hwaddr addr, uint32_t val);
|
|
void stq_le_phys(AddressSpace *as, hwaddr addr, uint64_t val);
|
|
void stq_be_phys(AddressSpace *as, hwaddr addr, uint64_t val);
|
|
|
|
struct MemoryRegionCache {
|
|
hwaddr xlat;
|
|
hwaddr len;
|
|
AddressSpace *as;
|
|
};
|
|
|
|
#define MEMORY_REGION_CACHE_INVALID ((MemoryRegionCache) { .as = NULL })
|
|
|
|
/* address_space_cache_init: prepare for repeated access to a physical
|
|
* memory region
|
|
*
|
|
* @cache: #MemoryRegionCache to be filled
|
|
* @as: #AddressSpace to be accessed
|
|
* @addr: address within that address space
|
|
* @len: length of buffer
|
|
* @is_write: indicates the transfer direction
|
|
*
|
|
* Will only work with RAM, and may map a subset of the requested range by
|
|
* returning a value that is less than @len. On failure, return a negative
|
|
* errno value.
|
|
*
|
|
* Because it only works with RAM, this function can be used for
|
|
* read-modify-write operations. In this case, is_write should be %true.
|
|
*
|
|
* Note that addresses passed to the address_space_*_cached functions
|
|
* are relative to @addr.
|
|
*/
|
|
int64_t address_space_cache_init(MemoryRegionCache *cache,
|
|
AddressSpace *as,
|
|
hwaddr addr,
|
|
hwaddr len,
|
|
bool is_write);
|
|
|
|
/**
|
|
* address_space_cache_invalidate: complete a write to a #MemoryRegionCache
|
|
*
|
|
* @cache: The #MemoryRegionCache to operate on.
|
|
* @addr: The first physical address that was written, relative to the
|
|
* address that was passed to @address_space_cache_init.
|
|
* @access_len: The number of bytes that were written starting at @addr.
|
|
*/
|
|
void address_space_cache_invalidate(MemoryRegionCache *cache,
|
|
hwaddr addr,
|
|
hwaddr access_len);
|
|
|
|
/**
|
|
* address_space_cache_destroy: free a #MemoryRegionCache
|
|
*
|
|
* @cache: The #MemoryRegionCache whose memory should be released.
|
|
*/
|
|
void address_space_cache_destroy(MemoryRegionCache *cache);
|
|
|
|
/* address_space_ld*_cached: load from a cached #MemoryRegion
|
|
* address_space_st*_cached: store into a cached #MemoryRegion
|
|
*
|
|
* These functions perform a load or store of the byte, word,
|
|
* longword or quad to the specified address. The address is
|
|
* a physical address in the AddressSpace, but it must lie within
|
|
* a #MemoryRegion that was mapped with address_space_cache_init.
|
|
*
|
|
* The _le suffixed functions treat the data as little endian;
|
|
* _be indicates big endian; no suffix indicates "same endianness
|
|
* as guest CPU".
|
|
*
|
|
* The "guest CPU endianness" accessors are deprecated for use outside
|
|
* target-* code; devices should be CPU-agnostic and use either the LE
|
|
* or the BE accessors.
|
|
*
|
|
* @cache: previously initialized #MemoryRegionCache to be accessed
|
|
* @addr: address within the address space
|
|
* @val: data value, for stores
|
|
* @attrs: memory transaction attributes
|
|
* @result: location to write the success/failure of the transaction;
|
|
* if NULL, this information is discarded
|
|
*/
|
|
uint32_t address_space_ldub_cached(MemoryRegionCache *cache, hwaddr addr,
|
|
MemTxAttrs attrs, MemTxResult *result);
|
|
uint32_t address_space_lduw_le_cached(MemoryRegionCache *cache, hwaddr addr,
|
|
MemTxAttrs attrs, MemTxResult *result);
|
|
uint32_t address_space_lduw_be_cached(MemoryRegionCache *cache, hwaddr addr,
|
|
MemTxAttrs attrs, MemTxResult *result);
|
|
uint32_t address_space_ldl_le_cached(MemoryRegionCache *cache, hwaddr addr,
|
|
MemTxAttrs attrs, MemTxResult *result);
|
|
uint32_t address_space_ldl_be_cached(MemoryRegionCache *cache, hwaddr addr,
|
|
MemTxAttrs attrs, MemTxResult *result);
|
|
uint64_t address_space_ldq_le_cached(MemoryRegionCache *cache, hwaddr addr,
|
|
MemTxAttrs attrs, MemTxResult *result);
|
|
uint64_t address_space_ldq_be_cached(MemoryRegionCache *cache, hwaddr addr,
|
|
MemTxAttrs attrs, MemTxResult *result);
|
|
void address_space_stb_cached(MemoryRegionCache *cache, hwaddr addr, uint32_t val,
|
|
MemTxAttrs attrs, MemTxResult *result);
|
|
void address_space_stw_le_cached(MemoryRegionCache *cache, hwaddr addr, uint32_t val,
|
|
MemTxAttrs attrs, MemTxResult *result);
|
|
void address_space_stw_be_cached(MemoryRegionCache *cache, hwaddr addr, uint32_t val,
|
|
MemTxAttrs attrs, MemTxResult *result);
|
|
void address_space_stl_le_cached(MemoryRegionCache *cache, hwaddr addr, uint32_t val,
|
|
MemTxAttrs attrs, MemTxResult *result);
|
|
void address_space_stl_be_cached(MemoryRegionCache *cache, hwaddr addr, uint32_t val,
|
|
MemTxAttrs attrs, MemTxResult *result);
|
|
void address_space_stq_le_cached(MemoryRegionCache *cache, hwaddr addr, uint64_t val,
|
|
MemTxAttrs attrs, MemTxResult *result);
|
|
void address_space_stq_be_cached(MemoryRegionCache *cache, hwaddr addr, uint64_t val,
|
|
MemTxAttrs attrs, MemTxResult *result);
|
|
|
|
uint32_t ldub_phys_cached(MemoryRegionCache *cache, hwaddr addr);
|
|
uint32_t lduw_le_phys_cached(MemoryRegionCache *cache, hwaddr addr);
|
|
uint32_t lduw_be_phys_cached(MemoryRegionCache *cache, hwaddr addr);
|
|
uint32_t ldl_le_phys_cached(MemoryRegionCache *cache, hwaddr addr);
|
|
uint32_t ldl_be_phys_cached(MemoryRegionCache *cache, hwaddr addr);
|
|
uint64_t ldq_le_phys_cached(MemoryRegionCache *cache, hwaddr addr);
|
|
uint64_t ldq_be_phys_cached(MemoryRegionCache *cache, hwaddr addr);
|
|
void stb_phys_cached(MemoryRegionCache *cache, hwaddr addr, uint32_t val);
|
|
void stw_le_phys_cached(MemoryRegionCache *cache, hwaddr addr, uint32_t val);
|
|
void stw_be_phys_cached(MemoryRegionCache *cache, hwaddr addr, uint32_t val);
|
|
void stl_le_phys_cached(MemoryRegionCache *cache, hwaddr addr, uint32_t val);
|
|
void stl_be_phys_cached(MemoryRegionCache *cache, hwaddr addr, uint32_t val);
|
|
void stq_le_phys_cached(MemoryRegionCache *cache, hwaddr addr, uint64_t val);
|
|
void stq_be_phys_cached(MemoryRegionCache *cache, hwaddr addr, uint64_t val);
|
|
/* address_space_get_iotlb_entry: translate an address into an IOTLB
|
|
* entry. Should be called from an RCU critical section.
|
|
*/
|
|
IOMMUTLBEntry address_space_get_iotlb_entry(AddressSpace *as, hwaddr addr,
|
|
bool is_write);
|
|
|
|
/* address_space_translate: translate an address range into an address space
|
|
* into a MemoryRegion and an address range into that section. Should be
|
|
* called from an RCU critical section, to avoid that the last reference
|
|
* to the returned region disappears after address_space_translate returns.
|
|
*
|
|
* @fv: #FlatView to be accessed
|
|
* @addr: address within that address space
|
|
* @xlat: pointer to address within the returned memory region section's
|
|
* #MemoryRegion.
|
|
* @len: pointer to length
|
|
* @is_write: indicates the transfer direction
|
|
*/
|
|
MemoryRegion *flatview_translate(FlatView *fv,
|
|
hwaddr addr, hwaddr *xlat,
|
|
hwaddr *len, bool is_write);
|
|
|
|
static inline MemoryRegion *address_space_translate(AddressSpace *as,
|
|
hwaddr addr, hwaddr *xlat,
|
|
hwaddr *len, bool is_write)
|
|
{
|
|
return flatview_translate(address_space_to_flatview(as),
|
|
addr, xlat, len, is_write);
|
|
}
|
|
|
|
/* address_space_access_valid: check for validity of accessing an address
|
|
* space range
|
|
*
|
|
* Check whether memory is assigned to the given address space range, and
|
|
* access is permitted by any IOMMU regions that are active for the address
|
|
* space.
|
|
*
|
|
* For now, addr and len should be aligned to a page size. This limitation
|
|
* will be lifted in the future.
|
|
*
|
|
* @as: #AddressSpace to be accessed
|
|
* @addr: address within that address space
|
|
* @len: length of the area to be checked
|
|
* @is_write: indicates the transfer direction
|
|
*/
|
|
bool address_space_access_valid(AddressSpace *as, hwaddr addr, int len, bool is_write);
|
|
|
|
/* address_space_map: map a physical memory region into a host virtual address
|
|
*
|
|
* May map a subset of the requested range, given by and returned in @plen.
|
|
* May return %NULL if resources needed to perform the mapping are exhausted.
|
|
* Use only for reads OR writes - not for read-modify-write operations.
|
|
* Use cpu_register_map_client() to know when retrying the map operation is
|
|
* likely to succeed.
|
|
*
|
|
* @as: #AddressSpace to be accessed
|
|
* @addr: address within that address space
|
|
* @plen: pointer to length of buffer; updated on return
|
|
* @is_write: indicates the transfer direction
|
|
*/
|
|
void *address_space_map(AddressSpace *as, hwaddr addr,
|
|
hwaddr *plen, bool is_write);
|
|
|
|
/* address_space_unmap: Unmaps a memory region previously mapped by address_space_map()
|
|
*
|
|
* Will also mark the memory as dirty if @is_write == %true. @access_len gives
|
|
* the amount of memory that was actually read or written by the caller.
|
|
*
|
|
* @as: #AddressSpace used
|
|
* @buffer: host pointer as returned by address_space_map()
|
|
* @len: buffer length as returned by address_space_map()
|
|
* @access_len: amount of data actually transferred
|
|
* @is_write: indicates the transfer direction
|
|
*/
|
|
void address_space_unmap(AddressSpace *as, void *buffer, hwaddr len,
|
|
int is_write, hwaddr access_len);
|
|
|
|
|
|
/* Internal functions, part of the implementation of address_space_read. */
|
|
MemTxResult flatview_read_continue(FlatView *fv, hwaddr addr,
|
|
MemTxAttrs attrs, uint8_t *buf,
|
|
int len, hwaddr addr1, hwaddr l,
|
|
MemoryRegion *mr);
|
|
|
|
MemTxResult flatview_read_full(FlatView *fv, hwaddr addr,
|
|
MemTxAttrs attrs, uint8_t *buf, int len);
|
|
void *qemu_map_ram_ptr(RAMBlock *ram_block, ram_addr_t addr);
|
|
|
|
static inline bool memory_access_is_direct(MemoryRegion *mr, bool is_write)
|
|
{
|
|
if (is_write) {
|
|
return memory_region_is_ram(mr) &&
|
|
!mr->readonly && !memory_region_is_ram_device(mr);
|
|
} else {
|
|
return (memory_region_is_ram(mr) && !memory_region_is_ram_device(mr)) ||
|
|
memory_region_is_romd(mr);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* address_space_read: read from an address space.
|
|
*
|
|
* Return a MemTxResult indicating whether the operation succeeded
|
|
* or failed (eg unassigned memory, device rejected the transaction,
|
|
* IOMMU fault).
|
|
*
|
|
* @fv: #FlatView to be accessed
|
|
* @addr: address within that address space
|
|
* @attrs: memory transaction attributes
|
|
* @buf: buffer with the data transferred
|
|
*/
|
|
static inline __attribute__((__always_inline__))
|
|
MemTxResult flatview_read(FlatView *fv, hwaddr addr, MemTxAttrs attrs,
|
|
uint8_t *buf, int len)
|
|
{
|
|
MemTxResult result = MEMTX_OK;
|
|
hwaddr l, addr1;
|
|
void *ptr;
|
|
MemoryRegion *mr;
|
|
|
|
if (__builtin_constant_p(len)) {
|
|
if (len) {
|
|
rcu_read_lock();
|
|
l = len;
|
|
mr = flatview_translate(fv, addr, &addr1, &l, false);
|
|
if (len == l && memory_access_is_direct(mr, false)) {
|
|
ptr = qemu_map_ram_ptr(mr->ram_block, addr1);
|
|
memcpy(buf, ptr, len);
|
|
} else {
|
|
result = flatview_read_continue(fv, addr, attrs, buf, len,
|
|
addr1, l, mr);
|
|
}
|
|
rcu_read_unlock();
|
|
}
|
|
} else {
|
|
result = flatview_read_full(fv, addr, attrs, buf, len);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
static inline MemTxResult address_space_read(AddressSpace *as, hwaddr addr,
|
|
MemTxAttrs attrs, uint8_t *buf,
|
|
int len)
|
|
{
|
|
return flatview_read(address_space_to_flatview(as), addr, attrs, buf, len);
|
|
}
|
|
|
|
/**
|
|
* address_space_read_cached: read from a cached RAM region
|
|
*
|
|
* @cache: Cached region to be addressed
|
|
* @addr: address relative to the base of the RAM region
|
|
* @buf: buffer with the data transferred
|
|
* @len: length of the data transferred
|
|
*/
|
|
static inline void
|
|
address_space_read_cached(MemoryRegionCache *cache, hwaddr addr,
|
|
void *buf, int len)
|
|
{
|
|
assert(addr < cache->len && len <= cache->len - addr);
|
|
address_space_read(cache->as, cache->xlat + addr, MEMTXATTRS_UNSPECIFIED, buf, len);
|
|
}
|
|
|
|
/**
|
|
* address_space_write_cached: write to a cached RAM region
|
|
*
|
|
* @cache: Cached region to be addressed
|
|
* @addr: address relative to the base of the RAM region
|
|
* @buf: buffer with the data transferred
|
|
* @len: length of the data transferred
|
|
*/
|
|
static inline void
|
|
address_space_write_cached(MemoryRegionCache *cache, hwaddr addr,
|
|
void *buf, int len)
|
|
{
|
|
assert(addr < cache->len && len <= cache->len - addr);
|
|
address_space_write(cache->as, cache->xlat + addr, MEMTXATTRS_UNSPECIFIED, buf, len);
|
|
}
|
|
|
|
#endif
|
|
|
|
#endif
|