--- /dev/null
+/*
+ * Declarations for cpu physical memory functions
+ *
+ * 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 or
+ * later. See the COPYING file in the top-level directory.
+ *
+ */
+
+/*
+ * This header is for use by exec.c and memory.c ONLY. Do not include it.
+ * The functions declared here will be removed soon.
+ */
+
+#ifndef RAM_ADDR_H
+#define RAM_ADDR_H
+
+#ifndef CONFIG_USER_ONLY
+#include "hw/xen/xen.h"
+
+ram_addr_t qemu_ram_alloc_from_file(ram_addr_t size, MemoryRegion *mr,
+ bool share, const char *mem_path,
+ Error **errp);
+ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size, void *host,
+ MemoryRegion *mr, Error **errp);
+ram_addr_t qemu_ram_alloc(ram_addr_t size, MemoryRegion *mr, Error **errp);
+ram_addr_t qemu_ram_alloc_resizeable(ram_addr_t size, ram_addr_t max_size,
+ void (*resized)(const char*,
+ uint64_t length,
+ void *host),
+ MemoryRegion *mr, Error **errp);
+int qemu_get_ram_fd(ram_addr_t addr);
+void *qemu_get_ram_block_host_ptr(ram_addr_t addr);
+void *qemu_get_ram_ptr(ram_addr_t addr);
+void qemu_ram_free(ram_addr_t addr);
+void qemu_ram_free_from_ptr(ram_addr_t addr);
+
+int qemu_ram_resize(ram_addr_t base, ram_addr_t newsize, Error **errp);
+
+#define DIRTY_CLIENTS_ALL ((1 << DIRTY_MEMORY_NUM) - 1)
+#define DIRTY_CLIENTS_NOCODE (DIRTY_CLIENTS_ALL & ~(1 << DIRTY_MEMORY_CODE))
+
+static inline bool cpu_physical_memory_get_dirty(ram_addr_t start,
+ ram_addr_t length,
+ unsigned client)
+{
+ unsigned long end, page, next;
+
+ assert(client < DIRTY_MEMORY_NUM);
+
+ end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
+ page = start >> TARGET_PAGE_BITS;
+ next = find_next_bit(ram_list.dirty_memory[client], end, page);
+
+ return next < end;
+}
+
+static inline bool cpu_physical_memory_all_dirty(ram_addr_t start,
+ ram_addr_t length,
+ unsigned client)
+{
+ unsigned long end, page, next;
+
+ assert(client < DIRTY_MEMORY_NUM);
+
+ end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
+ page = start >> TARGET_PAGE_BITS;
+ next = find_next_zero_bit(ram_list.dirty_memory[client], end, page);
+
+ return next >= end;
+}
+
+static inline bool cpu_physical_memory_get_dirty_flag(ram_addr_t addr,
+ unsigned client)
+{
+ return cpu_physical_memory_get_dirty(addr, 1, client);
+}
+
+static inline bool cpu_physical_memory_is_clean(ram_addr_t addr)
+{
+ bool vga = cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_VGA);
+ bool code = cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_CODE);
+ bool migration =
+ cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_MIGRATION);
+ return !(vga && code && migration);
+}
+
+static inline uint8_t cpu_physical_memory_range_includes_clean(ram_addr_t start,
+ ram_addr_t length,
+ uint8_t mask)
+{
+ uint8_t ret = 0;
+
+ if (mask & (1 << DIRTY_MEMORY_VGA) &&
+ !cpu_physical_memory_all_dirty(start, length, DIRTY_MEMORY_VGA)) {
+ ret |= (1 << DIRTY_MEMORY_VGA);
+ }
+ if (mask & (1 << DIRTY_MEMORY_CODE) &&
+ !cpu_physical_memory_all_dirty(start, length, DIRTY_MEMORY_CODE)) {
+ ret |= (1 << DIRTY_MEMORY_CODE);
+ }
+ if (mask & (1 << DIRTY_MEMORY_MIGRATION) &&
+ !cpu_physical_memory_all_dirty(start, length, DIRTY_MEMORY_MIGRATION)) {
+ ret |= (1 << DIRTY_MEMORY_MIGRATION);
+ }
+ return ret;
+}
+
+static inline void cpu_physical_memory_set_dirty_flag(ram_addr_t addr,
+ unsigned client)
+{
+ assert(client < DIRTY_MEMORY_NUM);
+ set_bit_atomic(addr >> TARGET_PAGE_BITS, ram_list.dirty_memory[client]);
+}
+
+static inline void cpu_physical_memory_set_dirty_range(ram_addr_t start,
+ ram_addr_t length,
+ uint8_t mask)
+{
+ unsigned long end, page;
+ unsigned long **d = ram_list.dirty_memory;
+
+ end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
+ page = start >> TARGET_PAGE_BITS;
+ if (likely(mask & (1 << DIRTY_MEMORY_MIGRATION))) {
+ bitmap_set_atomic(d[DIRTY_MEMORY_MIGRATION], page, end - page);
+ }
+ if (unlikely(mask & (1 << DIRTY_MEMORY_VGA))) {
+ bitmap_set_atomic(d[DIRTY_MEMORY_VGA], page, end - page);
+ }
+ if (unlikely(mask & (1 << DIRTY_MEMORY_CODE))) {
+ bitmap_set_atomic(d[DIRTY_MEMORY_CODE], page, end - page);
+ }
+ xen_modified_memory(start, length);
+}
+
+#if !defined(_WIN32)
+static inline void cpu_physical_memory_set_dirty_lebitmap(unsigned long *bitmap,
+ ram_addr_t start,
+ ram_addr_t pages)
+{
+ unsigned long i, j;
+ unsigned long page_number, c;
+ hwaddr addr;
+ ram_addr_t ram_addr;
+ unsigned long len = (pages + HOST_LONG_BITS - 1) / HOST_LONG_BITS;
+ unsigned long hpratio = getpagesize() / TARGET_PAGE_SIZE;
+ unsigned long page = BIT_WORD(start >> TARGET_PAGE_BITS);
+
+ /* start address is aligned at the start of a word? */
+ if ((((page * BITS_PER_LONG) << TARGET_PAGE_BITS) == start) &&
+ (hpratio == 1)) {
+ long k;
+ long nr = BITS_TO_LONGS(pages);
+
+ for (k = 0; k < nr; k++) {
+ if (bitmap[k]) {
+ unsigned long temp = leul_to_cpu(bitmap[k]);
+ unsigned long **d = ram_list.dirty_memory;
+
+ atomic_or(&d[DIRTY_MEMORY_MIGRATION][page + k], temp);
+ atomic_or(&d[DIRTY_MEMORY_VGA][page + k], temp);
+ if (tcg_enabled()) {
+ atomic_or(&d[DIRTY_MEMORY_CODE][page + k], temp);
+ }
+ }
+ }
+ xen_modified_memory(start, pages << TARGET_PAGE_BITS);
+ } else {
+ uint8_t clients = tcg_enabled() ? DIRTY_CLIENTS_ALL : DIRTY_CLIENTS_NOCODE;
+ /*
+ * bitmap-traveling is faster than memory-traveling (for addr...)
+ * especially when most of the memory is not dirty.
+ */
+ for (i = 0; i < len; i++) {
+ if (bitmap[i] != 0) {
+ c = leul_to_cpu(bitmap[i]);
+ do {
+ j = ctzl(c);
+ c &= ~(1ul << j);
+ page_number = (i * HOST_LONG_BITS + j) * hpratio;
+ addr = page_number * TARGET_PAGE_SIZE;
+ ram_addr = start + addr;
+ cpu_physical_memory_set_dirty_range(ram_addr,
+ TARGET_PAGE_SIZE * hpratio, clients);
+ } while (c != 0);
+ }
+ }
+ }
+}
+#endif /* not _WIN32 */
+
+bool cpu_physical_memory_test_and_clear_dirty(ram_addr_t start,
+ ram_addr_t length,
+ unsigned client);
+
+static inline void cpu_physical_memory_clear_dirty_range(ram_addr_t start,
+ ram_addr_t length)
+{
+ cpu_physical_memory_test_and_clear_dirty(start, length, DIRTY_MEMORY_MIGRATION);
+ cpu_physical_memory_test_and_clear_dirty(start, length, DIRTY_MEMORY_VGA);
+ cpu_physical_memory_test_and_clear_dirty(start, length, DIRTY_MEMORY_CODE);
+}
+
+
+static inline
+uint64_t cpu_physical_memory_sync_dirty_bitmap(unsigned long *dest,
+ ram_addr_t start,
+ ram_addr_t length)
+{
+ ram_addr_t addr;
+ unsigned long page = BIT_WORD(start >> TARGET_PAGE_BITS);
+ uint64_t num_dirty = 0;
+
+ /* start address is aligned at the start of a word? */
+ if (((page * BITS_PER_LONG) << TARGET_PAGE_BITS) == start) {
+ int k;
+ int nr = BITS_TO_LONGS(length >> TARGET_PAGE_BITS);
+ unsigned long *src = ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION];
+
+ for (k = page; k < page + nr; k++) {
+ if (src[k]) {
+ unsigned long bits = atomic_xchg(&src[k], 0);
+ unsigned long new_dirty;
+ new_dirty = ~dest[k];
+ dest[k] |= bits;
+ new_dirty &= bits;
+ num_dirty += ctpopl(new_dirty);
+ }
+ }
+ } else {
+ for (addr = 0; addr < length; addr += TARGET_PAGE_SIZE) {
+ if (cpu_physical_memory_test_and_clear_dirty(
+ start + addr,
+ TARGET_PAGE_SIZE,
+ DIRTY_MEMORY_MIGRATION)) {
+ long k = (start + addr) >> TARGET_PAGE_BITS;
+ if (!test_and_set_bit(k, dest)) {
+ num_dirty++;
+ }
+ }
+ }
+ }
+
+ return num_dirty;
+}
+
+#endif
+#endif
Code Review / kvmfornfv.git / blobdiff