Windows XP shows COM2 port as non functional in "Device Manager" although no COM2 port backing device is present in QEMU. This regression is really due to 3bb28b7208b349e7a1b326e3c6ef9efac1d462bf? memory: Provide separate handling of unassigned io ports accesses That is caused by the fact that QEMU reports to OSPM that device is present by setting 5th bit in PII4XPM.pci_conf[0x67] register when COM2 doesn't exist. It happens due to memory_region_present(io_as, 0x2f8) returning false positive since 0x2f8 address eventually translates into catchall io_as address space. Fix memory_region_present(parent, addr) by returning true only if addr maps into a MemoryRegion within parent (excluding parent itself), to match its doc comment. While at it fix copy/paste error in memory_region_present() doc comment. Note: this is a temporary hack: we really need better handling for unassigned regions, we should avoid fallback regions since they are bad for performance (breaking radix tree assumption that the data structure is sparsely populated); for memory we need to fix this to implement PCI master abort properly, anyway. Cc: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
1058 lines
37 KiB
C
1058 lines
37 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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#define DIRTY_MEMORY_VGA 0
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#define DIRTY_MEMORY_CODE 1
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#define DIRTY_MEMORY_MIGRATION 2
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#define DIRTY_MEMORY_NUM 3 /* num of dirty bits */
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#include <stdint.h>
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#include <stdbool.h>
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#include "qemu-common.h"
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#include "exec/cpu-common.h"
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#ifndef CONFIG_USER_ONLY
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#include "exec/hwaddr.h"
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#endif
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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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#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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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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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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* 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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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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typedef struct MemoryRegionIOMMUOps MemoryRegionIOMMUOps;
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struct MemoryRegionIOMMUOps {
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/* Return a TLB entry that contains a given address. */
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IOMMUTLBEntry (*translate)(MemoryRegion *iommu, hwaddr addr);
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};
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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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/* All fields are private - violators will be prosecuted */
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const MemoryRegionOps *ops;
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const MemoryRegionIOMMUOps *iommu_ops;
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void *opaque;
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struct Object *owner;
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MemoryRegion *parent;
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Int128 size;
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hwaddr addr;
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void (*destructor)(MemoryRegion *mr);
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ram_addr_t ram_addr;
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bool subpage;
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bool terminates;
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bool romd_mode;
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bool ram;
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bool readonly; /* For RAM regions */
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bool enabled;
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bool rom_device;
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bool warning_printed; /* For reservations */
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bool flush_coalesced_mmio;
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MemoryRegion *alias;
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hwaddr alias_offset;
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int priority;
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bool may_overlap;
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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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uint8_t dirty_log_mask;
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unsigned ioeventfd_nb;
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MemoryRegionIoeventfd *ioeventfds;
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NotifierList iommu_notify;
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};
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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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void (*log_stop)(MemoryListener *listener, MemoryRegionSection *section);
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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_filter;
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QTAILQ_ENTRY(MemoryListener) link;
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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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char *name;
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MemoryRegion *root;
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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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struct AddressSpaceDispatch *dispatch;
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struct AddressSpaceDispatch *next_dispatch;
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MemoryListener dispatch_listener;
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QTAILQ_ENTRY(AddressSpace) address_spaces_link;
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};
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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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* @address_space: 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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AddressSpace *address_space;
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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 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: Initialize RAM memory region. Accesses into the
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* region will modify memory 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: the name of the region.
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* @size: size of the region.
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*/
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void memory_region_init_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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/**
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* memory_region_init_ram_ptr: Initialize RAM memory region from a
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* user-provided pointer. Accesses into the
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* region will modify memory 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: the name of the region.
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* @size: size of the region.
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* @ptr: memory to be mapped; must contain at least @size bytes.
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*/
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void memory_region_init_ram_ptr(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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void *ptr);
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/**
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* memory_region_init_alias: Initialize a memory region that aliases all or a
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* part of another memory region.
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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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* @orig: the region to be referenced; @mr will be equivalent to
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* @orig between @offset and @offset + @size - 1.
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* @offset: start of the section in @orig to be referenced.
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* @size: size of the region.
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*/
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void memory_region_init_alias(MemoryRegion *mr,
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struct Object *owner,
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const char *name,
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MemoryRegion *orig,
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hwaddr offset,
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uint64_t size);
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/**
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* memory_region_init_rom_device: Initialize a ROM memory region. Writes are
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* handled via callbacks.
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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: callbacks for write access handling.
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* @name: the name of the region.
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* @size: size of the region.
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*/
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void memory_region_init_rom_device(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_reservation: Initialize a memory region that reserves
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* I/O space.
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*
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* A reservation region primariy serves debugging purposes. It claims I/O
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* space that is not supposed to be handled by QEMU itself. Any access via
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* the memory API will cause an abort().
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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.
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*/
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void memory_region_init_reservation(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_init_iommu: Initialize a memory region that translates
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* addresses
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*
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* An IOMMU region translates addresses and forwards accesses to a target
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* memory region.
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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 function that translates addresses into the @target region
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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_iommu(MemoryRegion *mr,
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struct Object *owner,
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const MemoryRegionIOMMUOps *ops,
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const char *name,
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uint64_t size);
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/**
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* memory_region_destroy: Destroy a memory region and reclaim all resources.
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*
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* @mr: the region to be destroyed. May not currently be a subregion
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* (see memory_region_add_subregion()) or referenced in an alias
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* (see memory_region_init_alias()).
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*/
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void memory_region_destroy(MemoryRegion *mr);
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/**
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* memory_region_owner: get a memory region's owner.
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*
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* @mr: the memory region being queried.
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*/
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struct Object *memory_region_owner(MemoryRegion *mr);
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/**
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* memory_region_size: get a memory region's size.
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*
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* @mr: the memory region being queried.
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*/
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uint64_t memory_region_size(MemoryRegion *mr);
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/**
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* memory_region_is_ram: check whether a memory region is random access
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*
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* Returns %true is a memory region is random access.
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*
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* @mr: the memory region being queried
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*/
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bool memory_region_is_ram(MemoryRegion *mr);
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/**
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* memory_region_is_romd: check whether a memory region is in ROMD mode
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*
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* Returns %true if a memory region is a ROM device and currently set to allow
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* direct reads.
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*
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* @mr: the memory region being queried
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*/
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static inline bool memory_region_is_romd(MemoryRegion *mr)
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{
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return mr->rom_device && mr->romd_mode;
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}
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/**
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* memory_region_is_iommu: check whether a memory region is an iommu
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*
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* Returns %true is a memory region is an iommu.
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*
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* @mr: the memory region being queried
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*/
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bool memory_region_is_iommu(MemoryRegion *mr);
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/**
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* memory_region_notify_iommu: notify a change in an IOMMU translation entry.
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*
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* @mr: the memory region that was changed
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* @entry: the new entry in the IOMMU translation table. The entry
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* replaces all old entries for the same virtual I/O address range.
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* Deleted entries have .@perm == 0.
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*/
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void memory_region_notify_iommu(MemoryRegion *mr,
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IOMMUTLBEntry entry);
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/**
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* memory_region_register_iommu_notifier: register a notifier for changes to
|
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* IOMMU translation entries.
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*
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* @mr: the memory region to observe
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* @n: the notifier to be added; the notifier receives a pointer to an
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* #IOMMUTLBEntry as the opaque value; the pointer ceases to be
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* valid on exit from the notifier.
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*/
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void memory_region_register_iommu_notifier(MemoryRegion *mr, Notifier *n);
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/**
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* memory_region_unregister_iommu_notifier: unregister a notifier for
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* changes to IOMMU translation entries.
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*
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* @n: the notifier to be removed.
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*/
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void memory_region_unregister_iommu_notifier(Notifier *n);
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|
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/**
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* memory_region_name: get a memory region's name
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*
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* Returns the string that was used to initialize the memory region.
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*
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* @mr: the memory region being queried
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*/
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const char *memory_region_name(MemoryRegion *mr);
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/**
|
|
* memory_region_is_logging: return whether a memory region is logging writes
|
|
*
|
|
* Returns %true if the memory region is logging writes
|
|
*
|
|
* @mr: the memory region being queried
|
|
*/
|
|
bool memory_region_is_logging(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
|
|
*/
|
|
bool memory_region_is_rom(MemoryRegion *mr);
|
|
|
|
/**
|
|
* 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.
|
|
*
|
|
* @mr: the memory region being queried.
|
|
*/
|
|
void *memory_region_get_ram_ptr(MemoryRegion *mr);
|
|
|
|
/**
|
|
* 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_MIGRATION or
|
|
* %DIRTY_MEMORY_VGA.
|
|
*/
|
|
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_test_and_clear_dirty: Check whether a range of bytes is dirty
|
|
* for a specified client. It clears them.
|
|
*
|
|
* 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_test_and_clear_dirty(MemoryRegion *mr, hwaddr addr,
|
|
hwaddr size, unsigned client);
|
|
/**
|
|
* memory_region_sync_dirty_bitmap: Synchronize a region's dirty bitmap with
|
|
* any external TLBs (e.g. kvm)
|
|
*
|
|
* Flushes dirty information from accelerators such as kvm and vhost-net
|
|
* and makes it available to users of the memory API.
|
|
*
|
|
* @mr: the region being flushed.
|
|
*/
|
|
void memory_region_sync_dirty_bitmap(MemoryRegion *mr);
|
|
|
|
/**
|
|
* 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_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
|
|
* @fd: the eventfd 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
|
|
* @fd: the eventfd 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
|
|
*
|
|
* DO NOT USE THIS FUNCTION. This is a temporary workaround while the Xen
|
|
* code is being reworked.
|
|
*/
|
|
ram_addr_t memory_region_get_ram_addr(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 parent.
|
|
* May be used on regions are currently part of a memory hierarchy.
|
|
*
|
|
* @mr: the region to be updated
|
|
* @addr: new address, relative to parent region
|
|
*/
|
|
void memory_region_set_address(MemoryRegion *mr, hwaddr addr);
|
|
|
|
/*
|
|
* 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 @parent
|
|
* translates into #MemoryRegion within @parent
|
|
*
|
|
* Answer whether a #MemoryRegion within @parent covers the address
|
|
* @addr.
|
|
*
|
|
* @parent: a #MemoryRegion within which @addr is a relative address
|
|
* @addr: the area within @parent to be searched
|
|
*/
|
|
bool memory_region_present(MemoryRegion *parent, hwaddr addr);
|
|
|
|
/**
|
|
* 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 parent (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);
|
|
|
|
/**
|
|
* address_space_sync_dirty_bitmap: synchronize the dirty log for all memory
|
|
*
|
|
* Synchronizes the dirty page log for an entire address space.
|
|
* @as: the address space that contains the memory being synchronized
|
|
*/
|
|
void address_space_sync_dirty_bitmap(AddressSpace *as);
|
|
|
|
/**
|
|
* 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);
|
|
|
|
/**
|
|
* address_space_init: initializes an address space
|
|
*
|
|
* @as: an uninitialized #AddressSpace
|
|
* @root: a #MemoryRegion that routes addesses 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 true if the operation hit any unassigned memory or encountered an
|
|
* IOMMU fault.
|
|
*
|
|
* @as: #AddressSpace to be accessed
|
|
* @addr: address within that address space
|
|
* @buf: buffer with the data transferred
|
|
* @is_write: indicates the transfer direction
|
|
*/
|
|
bool address_space_rw(AddressSpace *as, hwaddr addr, uint8_t *buf,
|
|
int len, bool is_write);
|
|
|
|
/**
|
|
* address_space_write: write to address space.
|
|
*
|
|
* Return true if the operation hit any unassigned memory or encountered an
|
|
* IOMMU fault.
|
|
*
|
|
* @as: #AddressSpace to be accessed
|
|
* @addr: address within that address space
|
|
* @buf: buffer with the data transferred
|
|
*/
|
|
bool address_space_write(AddressSpace *as, hwaddr addr,
|
|
const uint8_t *buf, int len);
|
|
|
|
/**
|
|
* address_space_read: read from an address space.
|
|
*
|
|
* Return true if the operation hit any unassigned memory or encountered an
|
|
* IOMMU fault.
|
|
*
|
|
* @as: #AddressSpace to be accessed
|
|
* @addr: address within that address space
|
|
* @buf: buffer with the data transferred
|
|
*/
|
|
bool address_space_read(AddressSpace *as, hwaddr addr, uint8_t *buf, int len);
|
|
|
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/* address_space_translate: translate an address range into an address space
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* into a MemoryRegion and an address range into that section
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*
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* @as: #AddressSpace to be accessed
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* @addr: address within that address space
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* @xlat: pointer to address within the returned memory region section's
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* #MemoryRegion.
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* @len: pointer to length
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* @is_write: indicates the transfer direction
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*/
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MemoryRegion *address_space_translate(AddressSpace *as, hwaddr addr,
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hwaddr *xlat, hwaddr *len,
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|
bool is_write);
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/* address_space_access_valid: check for validity of accessing an address
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|
* 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);
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|
|
|
/* 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
|
|
* @addr: address within that address space
|
|
* @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);
|
|
|
|
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#endif
|
|
|
|
#endif
|