| /* |
| * Physical memory management API |
| * |
| * Copyright 2011 Red Hat, Inc. and/or its affiliates |
| * |
| * Authors: |
| * Avi Kivity <avi@redhat.com> |
| * |
| * This work is licensed under the terms of the GNU GPL, version 2. See |
| * the COPYING file in the top-level directory. |
| * |
| */ |
| |
| #ifndef MEMORY_H |
| #define MEMORY_H |
| |
| #ifndef CONFIG_USER_ONLY |
| |
| #include <stdint.h> |
| #include <stdbool.h> |
| #include "qemu-common.h" |
| #include "cpu-common.h" |
| #include "targphys.h" |
| #include "qemu-queue.h" |
| #include "iorange.h" |
| #include "ioport.h" |
| #include "int128.h" |
| |
| typedef struct MemoryRegionOps MemoryRegionOps; |
| typedef struct MemoryRegion MemoryRegion; |
| typedef struct MemoryRegionPortio MemoryRegionPortio; |
| typedef struct MemoryRegionMmio MemoryRegionMmio; |
| |
| /* Must match *_DIRTY_FLAGS in cpu-all.h. To be replaced with dynamic |
| * registration. |
| */ |
| #define DIRTY_MEMORY_VGA 0 |
| #define DIRTY_MEMORY_CODE 1 |
| #define DIRTY_MEMORY_MIGRATION 3 |
| |
| struct MemoryRegionMmio { |
| CPUReadMemoryFunc *read[3]; |
| CPUWriteMemoryFunc *write[3]; |
| }; |
| |
| /* |
| * Memory region callbacks |
| */ |
| struct MemoryRegionOps { |
| /* Read from the memory region. @addr is relative to @mr; @size is |
| * in bytes. */ |
| uint64_t (*read)(void *opaque, |
| target_phys_addr_t addr, |
| unsigned size); |
| /* Write to the memory region. @addr is relative to @mr; @size is |
| * in bytes. */ |
| void (*write)(void *opaque, |
| target_phys_addr_t addr, |
| uint64_t data, |
| unsigned size); |
| |
| enum device_endian endianness; |
| /* Guest-visible constraints: */ |
| struct { |
| /* If nonzero, specify bounds on access sizes beyond which a machine |
| * check is thrown. |
| */ |
| unsigned min_access_size; |
| unsigned max_access_size; |
| /* If true, unaligned accesses are supported. Otherwise unaligned |
| * accesses throw machine checks. |
| */ |
| bool unaligned; |
| /* |
| * If present, and returns #false, the transaction is not accepted |
| * by the device (and results in machine dependent behaviour such |
| * as a machine check exception). |
| */ |
| bool (*accepts)(void *opaque, target_phys_addr_t addr, |
| unsigned size, bool is_write); |
| } valid; |
| /* Internal implementation constraints: */ |
| struct { |
| /* If nonzero, specifies the minimum size implemented. Smaller sizes |
| * will be rounded upwards and a partial result will be returned. |
| */ |
| unsigned min_access_size; |
| /* If nonzero, specifies the maximum size implemented. Larger sizes |
| * will be done as a series of accesses with smaller sizes. |
| */ |
| unsigned max_access_size; |
| /* If true, unaligned accesses are supported. Otherwise all accesses |
| * are converted to (possibly multiple) naturally aligned accesses. |
| */ |
| bool unaligned; |
| } impl; |
| |
| /* If .read and .write are not present, old_portio may be used for |
| * backwards compatibility with old portio registration |
| */ |
| const MemoryRegionPortio *old_portio; |
| /* If .read and .write are not present, old_mmio may be used for |
| * backwards compatibility with old mmio registration |
| */ |
| const MemoryRegionMmio old_mmio; |
| }; |
| |
| typedef struct CoalescedMemoryRange CoalescedMemoryRange; |
| typedef struct MemoryRegionIoeventfd MemoryRegionIoeventfd; |
| |
| struct MemoryRegion { |
| /* All fields are private - violators will be prosecuted */ |
| const MemoryRegionOps *ops; |
| void *opaque; |
| MemoryRegion *parent; |
| Int128 size; |
| target_phys_addr_t addr; |
| target_phys_addr_t offset; |
| bool backend_registered; |
| void (*destructor)(MemoryRegion *mr); |
| ram_addr_t ram_addr; |
| IORange iorange; |
| bool terminates; |
| bool readable; |
| bool readonly; /* For RAM regions */ |
| bool enabled; |
| MemoryRegion *alias; |
| target_phys_addr_t alias_offset; |
| unsigned priority; |
| bool may_overlap; |
| QTAILQ_HEAD(subregions, MemoryRegion) subregions; |
| QTAILQ_ENTRY(MemoryRegion) subregions_link; |
| QTAILQ_HEAD(coalesced_ranges, CoalescedMemoryRange) coalesced; |
| const char *name; |
| uint8_t dirty_log_mask; |
| unsigned ioeventfd_nb; |
| MemoryRegionIoeventfd *ioeventfds; |
| }; |
| |
| struct MemoryRegionPortio { |
| uint32_t offset; |
| uint32_t len; |
| unsigned size; |
| IOPortReadFunc *read; |
| IOPortWriteFunc *write; |
| }; |
| |
| #define PORTIO_END_OF_LIST() { } |
| |
| /** |
| * memory_region_init: Initialize a memory region |
| * |
| * The region typically acts as a container for other memory regions. Use |
| * memory_region_add_subregion() to add subregions. |
| * |
| * @mr: the #MemoryRegion to be initialized |
| * @name: used for debugging; not visible to the user or ABI |
| * @size: size of the region; any subregions beyond this size will be clipped |
| */ |
| void memory_region_init(MemoryRegion *mr, |
| const char *name, |
| uint64_t size); |
| /** |
| * memory_region_init_io: Initialize an I/O memory region. |
| * |
| * Accesses into the region will cause the callbacks in @ops to be called. |
| * if @size is nonzero, subregions will be clipped to @size. |
| * |
| * @mr: the #MemoryRegion to be initialized. |
| * @ops: a structure containing read and write callbacks to be used when |
| * I/O is performed on the region. |
| * @opaque: passed to to the read and write callbacks of the @ops structure. |
| * @name: used for debugging; not visible to the user or ABI |
| * @size: size of the region. |
| */ |
| void memory_region_init_io(MemoryRegion *mr, |
| const MemoryRegionOps *ops, |
| void *opaque, |
| 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. |
| * @dev: a device associated with the region; may be %NULL. |
| * @name: the name of the region; the pair (@dev, @name) must be globally |
| * unique. The name is part of the save/restore ABI and so cannot be |
| * changed. |
| * @size: size of the region. |
| */ |
| void memory_region_init_ram(MemoryRegion *mr, |
| DeviceState *dev, /* FIXME: layering violation */ |
| const char *name, |
| uint64_t size); |
| |
| /** |
| * memory_region_init_ram: Initialize RAM memory region from a user-provided. |
| * pointer. Accesses into the region will modify |
| * memory directly. |
| * |
| * @mr: the #MemoryRegion to be initialized. |
| * @dev: a device associated with the region; may be %NULL. |
| * @name: the name of the region; the pair (@dev, @name) must be globally |
| * unique. The name is part of the save/restore ABI and so cannot be |
| * changed. |
| * @size: size of the region. |
| * @ptr: memory to be mapped; must contain at least @size bytes. |
| */ |
| void memory_region_init_ram_ptr(MemoryRegion *mr, |
| DeviceState *dev, /* FIXME: layering violation */ |
| 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. |
| * @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, |
| const char *name, |
| MemoryRegion *orig, |
| target_phys_addr_t offset, |
| uint64_t size); |
| |
| /** |
| * memory_region_init_rom_device: Initialize a ROM memory region. Writes are |
| * handled via callbacks. |
| * |
| * @mr: the #MemoryRegion to be initialized. |
| * @ops: callbacks for write access handling. |
| * @dev: a device associated with the region; may be %NULL. |
| * @name: the name of the region; the pair (@dev, @name) must be globally |
| * unique. The name is part of the save/restore ABI and so cannot be |
| * changed. |
| * @size: size of the region. |
| */ |
| void memory_region_init_rom_device(MemoryRegion *mr, |
| const MemoryRegionOps *ops, |
| void *opaque, |
| DeviceState *dev, /* FIXME: layering violation */ |
| const char *name, |
| uint64_t size); |
| |
| /** |
| * memory_region_destroy: Destroy a memory region and reclaim all resources. |
| * |
| * @mr: the region to be destroyed. May not currently be a subregion |
| * (see memory_region_add_subregion()) or referenced in an alias |
| * (see memory_region_init_alias()). |
| */ |
| void memory_region_destroy(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_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_offset: Sets an offset to be added to MemoryRegionOps |
| * callbacks. |
| * |
| * This function is deprecated and should not be used in new code. |
| */ |
| void memory_region_set_offset(MemoryRegion *mr, target_phys_addr_t offset); |
| |
| /** |
| * 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 page is dirty for a specified |
| * client. |
| * |
| * Checks whether a page 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. |
| * @client: the user of the logging information; %DIRTY_MEMORY_MIGRATION or |
| * %DIRTY_MEMORY_VGA. |
| */ |
| bool memory_region_get_dirty(MemoryRegion *mr, target_phys_addr_t addr, |
| unsigned client); |
| |
| /** |
| * memory_region_set_dirty: Mark a page as dirty in a memory region. |
| * |
| * Marks a page as dirty, after it has been dirtied outside guest code. |
| * |
| * @mr: the memory region being queried. |
| * @addr: the address (relative to the start of the region) being dirtied. |
| */ |
| void memory_region_set_dirty(MemoryRegion *mr, target_phys_addr_t addr); |
| |
| /** |
| * 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, target_phys_addr_t addr, |
| target_phys_addr_t 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_readable: enable/disable ROM readability |
| * |
| * Allows a ROM device (initialized with memory_region_init_rom_device() to |
| * to be marked as readable (default) or not readable. When it is readable, |
| * the device is mapped to guest memory. When not readable, reads are |
| * forwarded to the #MemoryRegion.read function. |
| * |
| * @mr: the memory region to be updated |
| * @readable: whether reads are satisified directly (%true) or via callbacks |
| * (%false) |
| */ |
| void memory_region_rom_device_set_readable(MemoryRegion *mr, bool readable); |
| |
| /** |
| * 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, |
| target_phys_addr_t 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_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, |
| target_phys_addr_t addr, |
| unsigned size, |
| bool match_data, |
| uint64_t data, |
| int fd); |
| |
| /** |
| * 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, |
| target_phys_addr_t addr, |
| unsigned size, |
| bool match_data, |
| uint64_t data, |
| int fd); |
| /** |
| * 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, |
| target_phys_addr_t offset, |
| MemoryRegion *subregion); |
| /** |
| * memory_region_add_subregion: 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, |
| target_phys_addr_t offset, |
| MemoryRegion *subregion, |
| unsigned priority); |
| /** |
| * 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, target_phys_addr_t 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, |
| target_phys_addr_t offset); |
| |
| /** |
| * memory_region_transaction_begin: Start a transaction. |
| * |
| * During a transaction, changes will be accumulated and made visible |
| * only when the transaction ends (is commited). |
| */ |
| 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); |
| |
| void mtree_info(fprintf_function mon_printf, void *f); |
| |
| #endif |
| |
| #endif |
