2013-10-14 17:13:59 +02:00
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/*
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* Declarations for cpu physical memory functions
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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 or
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* later. See the COPYING file in the top-level directory.
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*
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*/
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/*
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* This header is for use by exec.c and memory.c ONLY. Do not include it.
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* The functions declared here will be removed soon.
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*/
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#ifndef RAM_ADDR_H
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#define RAM_ADDR_H
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#ifndef CONFIG_USER_ONLY
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#include "hw/xen/xen.h"
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2015-08-14 12:25:14 +02:00
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struct RAMBlock {
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struct rcu_head rcu;
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struct MemoryRegion *mr;
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uint8_t *host;
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ram_addr_t offset;
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ram_addr_t used_length;
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ram_addr_t max_length;
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void (*resized)(const char*, uint64_t length, void *host);
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uint32_t flags;
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/* Protected by iothread lock. */
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char idstr[256];
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/* RCU-enabled, writes protected by the ramlist lock */
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QLIST_ENTRY(RAMBlock) next;
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int fd;
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};
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static inline void *ramblock_ptr(RAMBlock *block, ram_addr_t offset)
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{
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assert(offset < block->used_length);
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assert(block->host);
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return (char *)block->host + offset;
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}
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typedef struct RAMList {
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QemuMutex mutex;
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/* Protected by the iothread lock. */
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unsigned long *dirty_memory[DIRTY_MEMORY_NUM];
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RAMBlock *mru_block;
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/* RCU-enabled, writes protected by the ramlist lock. */
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QLIST_HEAD(, RAMBlock) blocks;
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uint32_t version;
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} RAMList;
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extern RAMList ram_list;
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ram_addr_t last_ram_offset(void);
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void qemu_mutex_lock_ramlist(void);
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void qemu_mutex_unlock_ramlist(void);
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2014-05-14 11:43:18 +02:00
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ram_addr_t qemu_ram_alloc_from_file(ram_addr_t size, MemoryRegion *mr,
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2014-06-10 13:15:24 +02:00
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bool share, const char *mem_path,
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Error **errp);
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2013-10-14 17:13:59 +02:00
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ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size, void *host,
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2014-09-09 07:27:54 +02:00
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MemoryRegion *mr, Error **errp);
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ram_addr_t qemu_ram_alloc(ram_addr_t size, MemoryRegion *mr, Error **errp);
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2014-11-12 13:27:41 +01:00
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ram_addr_t qemu_ram_alloc_resizeable(ram_addr_t size, ram_addr_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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MemoryRegion *mr, Error **errp);
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2014-06-10 13:15:23 +02:00
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int qemu_get_ram_fd(ram_addr_t addr);
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2014-06-26 23:01:32 +02:00
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void *qemu_get_ram_block_host_ptr(ram_addr_t addr);
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2013-10-14 17:13:59 +02:00
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void *qemu_get_ram_ptr(ram_addr_t addr);
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void qemu_ram_free(ram_addr_t addr);
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2014-11-12 13:27:41 +01:00
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int qemu_ram_resize(ram_addr_t base, ram_addr_t newsize, Error **errp);
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2015-03-23 11:56:01 +01:00
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#define DIRTY_CLIENTS_ALL ((1 << DIRTY_MEMORY_NUM) - 1)
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#define DIRTY_CLIENTS_NOCODE (DIRTY_CLIENTS_ALL & ~(1 << DIRTY_MEMORY_CODE))
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2013-10-14 17:13:59 +02:00
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static inline bool cpu_physical_memory_get_dirty(ram_addr_t start,
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ram_addr_t length,
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unsigned client)
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{
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unsigned long end, page, next;
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assert(client < DIRTY_MEMORY_NUM);
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end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
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page = start >> TARGET_PAGE_BITS;
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next = find_next_bit(ram_list.dirty_memory[client], end, page);
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return next < end;
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}
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2015-04-22 13:48:25 +02:00
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static inline bool cpu_physical_memory_all_dirty(ram_addr_t start,
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2014-11-16 20:44:21 +01:00
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ram_addr_t length,
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unsigned client)
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{
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unsigned long end, page, next;
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assert(client < DIRTY_MEMORY_NUM);
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end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
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page = start >> TARGET_PAGE_BITS;
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next = find_next_zero_bit(ram_list.dirty_memory[client], end, page);
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2015-04-22 13:48:25 +02:00
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return next >= end;
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2014-11-16 20:44:21 +01:00
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}
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2013-10-14 17:13:59 +02:00
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static inline bool cpu_physical_memory_get_dirty_flag(ram_addr_t addr,
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unsigned client)
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{
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return cpu_physical_memory_get_dirty(addr, 1, client);
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}
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static inline bool cpu_physical_memory_is_clean(ram_addr_t addr)
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{
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bool vga = cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_VGA);
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bool code = cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_CODE);
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bool migration =
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cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_MIGRATION);
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return !(vga && code && migration);
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}
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2015-03-25 15:21:39 +01:00
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static inline uint8_t cpu_physical_memory_range_includes_clean(ram_addr_t start,
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ram_addr_t length,
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uint8_t mask)
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2014-11-16 20:44:21 +01:00
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{
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2015-03-25 15:21:39 +01:00
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uint8_t ret = 0;
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if (mask & (1 << DIRTY_MEMORY_VGA) &&
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!cpu_physical_memory_all_dirty(start, length, DIRTY_MEMORY_VGA)) {
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ret |= (1 << DIRTY_MEMORY_VGA);
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}
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if (mask & (1 << DIRTY_MEMORY_CODE) &&
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!cpu_physical_memory_all_dirty(start, length, DIRTY_MEMORY_CODE)) {
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ret |= (1 << DIRTY_MEMORY_CODE);
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}
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if (mask & (1 << DIRTY_MEMORY_MIGRATION) &&
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!cpu_physical_memory_all_dirty(start, length, DIRTY_MEMORY_MIGRATION)) {
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ret |= (1 << DIRTY_MEMORY_MIGRATION);
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}
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return ret;
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2014-11-16 20:44:21 +01:00
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}
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2013-10-14 17:13:59 +02:00
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static inline void cpu_physical_memory_set_dirty_flag(ram_addr_t addr,
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unsigned client)
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{
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assert(client < DIRTY_MEMORY_NUM);
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2014-12-02 12:23:16 +01:00
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set_bit_atomic(addr >> TARGET_PAGE_BITS, ram_list.dirty_memory[client]);
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2013-10-14 17:13:59 +02:00
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}
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static inline void cpu_physical_memory_set_dirty_range(ram_addr_t start,
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2015-03-23 11:56:01 +01:00
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ram_addr_t length,
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uint8_t mask)
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2013-10-14 17:13:59 +02:00
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{
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unsigned long end, page;
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2014-12-02 12:23:16 +01:00
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unsigned long **d = ram_list.dirty_memory;
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2013-10-14 17:13:59 +02:00
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end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
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page = start >> TARGET_PAGE_BITS;
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2015-03-23 11:56:01 +01:00
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if (likely(mask & (1 << DIRTY_MEMORY_MIGRATION))) {
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2014-12-02 12:23:16 +01:00
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bitmap_set_atomic(d[DIRTY_MEMORY_MIGRATION], page, end - page);
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2015-03-23 11:56:01 +01:00
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}
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if (unlikely(mask & (1 << DIRTY_MEMORY_VGA))) {
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2014-12-02 12:23:16 +01:00
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bitmap_set_atomic(d[DIRTY_MEMORY_VGA], page, end - page);
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2015-03-23 11:56:01 +01:00
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}
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if (unlikely(mask & (1 << DIRTY_MEMORY_CODE))) {
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2014-12-02 12:23:16 +01:00
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bitmap_set_atomic(d[DIRTY_MEMORY_CODE], page, end - page);
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2015-03-23 11:56:01 +01:00
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}
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2013-10-14 17:13:59 +02:00
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xen_modified_memory(start, length);
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}
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2014-01-14 07:00:28 +01:00
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#if !defined(_WIN32)
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2013-11-05 15:52:54 +01:00
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static inline void cpu_physical_memory_set_dirty_lebitmap(unsigned long *bitmap,
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ram_addr_t start,
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ram_addr_t pages)
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{
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2013-11-05 16:46:26 +01:00
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unsigned long i, j;
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2013-11-05 15:52:54 +01:00
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unsigned long page_number, c;
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hwaddr addr;
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ram_addr_t ram_addr;
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2013-11-05 16:46:26 +01:00
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unsigned long len = (pages + HOST_LONG_BITS - 1) / HOST_LONG_BITS;
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2013-11-05 15:52:54 +01:00
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unsigned long hpratio = getpagesize() / TARGET_PAGE_SIZE;
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2013-11-05 16:46:26 +01:00
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unsigned long page = BIT_WORD(start >> TARGET_PAGE_BITS);
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2013-11-05 15:52:54 +01:00
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2013-11-05 16:46:26 +01:00
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/* start address is aligned at the start of a word? */
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2014-01-30 13:03:50 +01:00
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if ((((page * BITS_PER_LONG) << TARGET_PAGE_BITS) == start) &&
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(hpratio == 1)) {
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2013-11-05 16:46:26 +01:00
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long k;
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long nr = BITS_TO_LONGS(pages);
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for (k = 0; k < nr; k++) {
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if (bitmap[k]) {
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unsigned long temp = leul_to_cpu(bitmap[k]);
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2014-12-02 12:23:16 +01:00
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unsigned long **d = ram_list.dirty_memory;
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2013-11-05 16:46:26 +01:00
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2014-12-02 12:23:16 +01:00
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atomic_or(&d[DIRTY_MEMORY_MIGRATION][page + k], temp);
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atomic_or(&d[DIRTY_MEMORY_VGA][page + k], temp);
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2015-03-23 11:41:32 +01:00
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if (tcg_enabled()) {
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2014-12-02 12:23:16 +01:00
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atomic_or(&d[DIRTY_MEMORY_CODE][page + k], temp);
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2015-03-23 11:41:32 +01:00
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}
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2013-11-05 16:46:26 +01:00
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}
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}
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2015-03-23 11:35:19 +01:00
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xen_modified_memory(start, pages << TARGET_PAGE_BITS);
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2013-11-05 16:46:26 +01:00
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} else {
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2015-03-23 11:41:32 +01:00
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uint8_t clients = tcg_enabled() ? DIRTY_CLIENTS_ALL : DIRTY_CLIENTS_NOCODE;
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2013-11-05 16:46:26 +01:00
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/*
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* bitmap-traveling is faster than memory-traveling (for addr...)
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* especially when most of the memory is not dirty.
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*/
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for (i = 0; i < len; i++) {
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if (bitmap[i] != 0) {
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c = leul_to_cpu(bitmap[i]);
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do {
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2014-04-29 16:17:30 +02:00
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j = ctzl(c);
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2013-11-05 16:46:26 +01:00
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c &= ~(1ul << j);
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page_number = (i * HOST_LONG_BITS + j) * hpratio;
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addr = page_number * TARGET_PAGE_SIZE;
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ram_addr = start + addr;
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cpu_physical_memory_set_dirty_range(ram_addr,
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2015-03-23 11:41:32 +01:00
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TARGET_PAGE_SIZE * hpratio, clients);
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2013-11-05 16:46:26 +01:00
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} while (c != 0);
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}
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2013-11-05 15:52:54 +01:00
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}
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}
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}
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2014-01-14 07:00:28 +01:00
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#endif /* not _WIN32 */
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2013-11-05 15:52:54 +01:00
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2014-12-02 12:23:18 +01:00
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bool cpu_physical_memory_test_and_clear_dirty(ram_addr_t start,
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ram_addr_t length,
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unsigned client);
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2013-10-14 17:13:59 +02:00
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2014-11-17 16:54:07 +01:00
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static inline void cpu_physical_memory_clear_dirty_range(ram_addr_t start,
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ram_addr_t length)
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{
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2014-12-02 12:23:18 +01:00
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cpu_physical_memory_test_and_clear_dirty(start, length, DIRTY_MEMORY_MIGRATION);
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cpu_physical_memory_test_and_clear_dirty(start, length, DIRTY_MEMORY_VGA);
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cpu_physical_memory_test_and_clear_dirty(start, length, DIRTY_MEMORY_CODE);
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2014-11-17 16:54:07 +01:00
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}
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2014-12-02 12:23:17 +01:00
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static inline
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uint64_t cpu_physical_memory_sync_dirty_bitmap(unsigned long *dest,
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ram_addr_t start,
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ram_addr_t length)
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{
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ram_addr_t addr;
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unsigned long page = BIT_WORD(start >> TARGET_PAGE_BITS);
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uint64_t num_dirty = 0;
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/* start address is aligned at the start of a word? */
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if (((page * BITS_PER_LONG) << TARGET_PAGE_BITS) == start) {
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int k;
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int nr = BITS_TO_LONGS(length >> TARGET_PAGE_BITS);
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unsigned long *src = ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION];
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for (k = page; k < page + nr; k++) {
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if (src[k]) {
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2014-12-02 12:23:19 +01:00
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unsigned long bits = atomic_xchg(&src[k], 0);
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2014-12-02 12:23:17 +01:00
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unsigned long new_dirty;
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new_dirty = ~dest[k];
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2014-12-02 12:23:19 +01:00
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dest[k] |= bits;
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new_dirty &= bits;
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2014-12-02 12:23:17 +01:00
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num_dirty += ctpopl(new_dirty);
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}
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}
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} else {
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for (addr = 0; addr < length; addr += TARGET_PAGE_SIZE) {
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2014-12-02 12:23:18 +01:00
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if (cpu_physical_memory_test_and_clear_dirty(
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start + addr,
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TARGET_PAGE_SIZE,
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DIRTY_MEMORY_MIGRATION)) {
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2014-12-02 12:23:17 +01:00
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long k = (start + addr) >> TARGET_PAGE_BITS;
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if (!test_and_set_bit(k, dest)) {
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num_dirty++;
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}
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}
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}
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}
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return num_dirty;
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}
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2015-08-11 10:52:46 +02:00
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void migration_bitmap_extend(ram_addr_t old, ram_addr_t new);
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2013-10-14 17:13:59 +02:00
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#endif
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#endif
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