#include "qemu-common.h"
#include "tcg.h"
#include "hw/hw.h"
+#include "hw/qdev.h"
#include "osdep.h"
#include "kvm.h"
#include "qemu-timer.h"
#define SMC_BITMAP_USE_THRESHOLD 10
static TranslationBlock *tbs;
-int code_gen_max_blocks;
+static int code_gen_max_blocks;
TranslationBlock *tb_phys_hash[CODE_GEN_PHYS_HASH_SIZE];
static int nb_tbs;
/* any access to the tbs or the page table must use this lock */
static unsigned long code_gen_buffer_size;
/* threshold to flush the translated code buffer */
static unsigned long code_gen_buffer_max_size;
-uint8_t *code_gen_ptr;
+static uint8_t *code_gen_ptr;
#if !defined(CONFIG_USER_ONLY)
int phys_ram_fd;
-uint8_t *phys_ram_dirty;
static int in_migration;
-typedef struct RAMBlock {
- uint8_t *host;
- ram_addr_t offset;
- ram_addr_t length;
- struct RAMBlock *next;
-} RAMBlock;
-
-static RAMBlock *ram_blocks;
-/* TODO: When we implement (and use) ram deallocation (e.g. for hotplug)
- then we can no longer assume contiguous ram offsets, and external uses
- of this variable will break. */
-ram_addr_t last_ram_offset;
+RAMList ram_list = { .blocks = QLIST_HEAD_INITIALIZER(ram_list) };
#endif
CPUState *first_cpu;
start = (void *) 0x01000000UL;
if (code_gen_buffer_size > 16 * 1024 * 1024)
code_gen_buffer_size = 16 * 1024 * 1024;
+#elif defined(__s390x__)
+ /* Map the buffer so that we can use direct calls and branches. */
+ /* We have a +- 4GB range on the branches; leave some slop. */
+ if (code_gen_buffer_size > (3ul * 1024 * 1024 * 1024)) {
+ code_gen_buffer_size = 3ul * 1024 * 1024 * 1024;
+ }
+ start = (void *)0x90000000UL;
#endif
code_gen_buffer = mmap(start, code_gen_buffer_size,
PROT_WRITE | PROT_READ | PROT_EXEC,
#endif /* !USE_STATIC_CODE_GEN_BUFFER */
map_exec(code_gen_prologue, sizeof(code_gen_prologue));
code_gen_buffer_max_size = code_gen_buffer_size -
- code_gen_max_block_size();
+ (TCG_MAX_OP_SIZE * OPC_MAX_SIZE);
code_gen_max_blocks = code_gen_buffer_size / CODE_GEN_AVG_BLOCK_SIZE;
tbs = qemu_malloc(code_gen_max_blocks * sizeof(TranslationBlock));
}
#if !defined(CONFIG_USER_ONLY)
io_mem_init();
#endif
+#if !defined(CONFIG_USER_ONLY) || !defined(CONFIG_USE_GUEST_BASE)
+ /* There's no guest base to take into account, so go ahead and
+ initialize the prologue now. */
+ tcg_prologue_init(&tcg_ctx);
+#endif
}
#if defined(CPU_SAVE_VERSION) && !defined(CONFIG_USER_ONLY)
cpu_list_unlock();
#endif
#if defined(CPU_SAVE_VERSION) && !defined(CONFIG_USER_ONLY)
- vmstate_register(cpu_index, &vmstate_cpu_common, env);
- register_savevm("cpu", cpu_index, CPU_SAVE_VERSION,
+ vmstate_register(NULL, cpu_index, &vmstate_cpu_common, env);
+ register_savevm(NULL, "cpu", cpu_index, CPU_SAVE_VERSION,
cpu_save, cpu_load, env);
#endif
}
watchpoint trap routines. */
QTAILQ_FOREACH(wp, &env->watchpoints, entry) {
if (vaddr == (wp->vaddr & TARGET_PAGE_MASK)) {
- iotlb = io_mem_watch + paddr;
- /* TODO: The memory case can be optimized by not trapping
- reads of pages with a write breakpoint. */
- address |= TLB_MMIO;
+ /* Avoid trapping reads of pages with a write breakpoint. */
+ if ((prot & PAGE_WRITE) || (wp->flags & BP_MEM_READ)) {
+ iotlb = io_mem_watch + paddr;
+ address |= TLB_MMIO;
+ break;
+ }
}
}
return fs.f_bsize;
}
-static void *file_ram_alloc(ram_addr_t memory, const char *path)
+static void *file_ram_alloc(RAMBlock *block,
+ ram_addr_t memory,
+ const char *path)
{
char *filename;
void *area;
close(fd);
return (NULL);
}
+ block->fd = fd;
return area;
}
#endif
-ram_addr_t qemu_ram_alloc(ram_addr_t size)
+static ram_addr_t find_ram_offset(ram_addr_t size)
{
- RAMBlock *new_block;
+ RAMBlock *block, *next_block;
+ ram_addr_t offset = 0, mingap = ULONG_MAX;
+
+ if (QLIST_EMPTY(&ram_list.blocks))
+ return 0;
+
+ QLIST_FOREACH(block, &ram_list.blocks, next) {
+ ram_addr_t end, next = ULONG_MAX;
+
+ end = block->offset + block->length;
+
+ QLIST_FOREACH(next_block, &ram_list.blocks, next) {
+ if (next_block->offset >= end) {
+ next = MIN(next, next_block->offset);
+ }
+ }
+ if (next - end >= size && next - end < mingap) {
+ offset = end;
+ mingap = next - end;
+ }
+ }
+ return offset;
+}
+
+static ram_addr_t last_ram_offset(void)
+{
+ RAMBlock *block;
+ ram_addr_t last = 0;
+
+ QLIST_FOREACH(block, &ram_list.blocks, next)
+ last = MAX(last, block->offset + block->length);
+
+ return last;
+}
+
+ram_addr_t qemu_ram_alloc(DeviceState *dev, const char *name, ram_addr_t size)
+{
+ RAMBlock *new_block, *block;
size = TARGET_PAGE_ALIGN(size);
- new_block = qemu_malloc(sizeof(*new_block));
+ new_block = qemu_mallocz(sizeof(*new_block));
+
+ if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) {
+ char *id = dev->parent_bus->info->get_dev_path(dev);
+ if (id) {
+ snprintf(new_block->idstr, sizeof(new_block->idstr), "%s/", id);
+ qemu_free(id);
+ }
+ }
+ pstrcat(new_block->idstr, sizeof(new_block->idstr), name);
+
+ QLIST_FOREACH(block, &ram_list.blocks, next) {
+ if (!strcmp(block->idstr, new_block->idstr)) {
+ fprintf(stderr, "RAMBlock \"%s\" already registered, abort!\n",
+ new_block->idstr);
+ abort();
+ }
+ }
if (mem_path) {
#if defined (__linux__) && !defined(TARGET_S390X)
- new_block->host = file_ram_alloc(size, mem_path);
+ new_block->host = file_ram_alloc(new_block, size, mem_path);
if (!new_block->host) {
new_block->host = qemu_vmalloc(size);
#ifdef MADV_MERGEABLE
madvise(new_block->host, size, MADV_MERGEABLE);
#endif
}
- new_block->offset = last_ram_offset;
+ new_block->offset = find_ram_offset(size);
new_block->length = size;
- new_block->next = ram_blocks;
- ram_blocks = new_block;
+ QLIST_INSERT_HEAD(&ram_list.blocks, new_block, next);
- phys_ram_dirty = qemu_realloc(phys_ram_dirty,
- (last_ram_offset + size) >> TARGET_PAGE_BITS);
- memset(phys_ram_dirty + (last_ram_offset >> TARGET_PAGE_BITS),
+ ram_list.phys_dirty = qemu_realloc(ram_list.phys_dirty,
+ last_ram_offset() >> TARGET_PAGE_BITS);
+ memset(ram_list.phys_dirty + (new_block->offset >> TARGET_PAGE_BITS),
0xff, size >> TARGET_PAGE_BITS);
- last_ram_offset += size;
-
if (kvm_enabled())
kvm_setup_guest_memory(new_block->host, size);
void qemu_ram_free(ram_addr_t addr)
{
- /* TODO: implement this. */
+ RAMBlock *block;
+
+ QLIST_FOREACH(block, &ram_list.blocks, next) {
+ if (addr == block->offset) {
+ QLIST_REMOVE(block, next);
+ if (mem_path) {
+#if defined (__linux__) && !defined(TARGET_S390X)
+ if (block->fd) {
+ munmap(block->host, block->length);
+ close(block->fd);
+ } else {
+ qemu_vfree(block->host);
+ }
+#endif
+ } else {
+#if defined(TARGET_S390X) && defined(CONFIG_KVM)
+ munmap(block->host, block->length);
+#else
+ qemu_vfree(block->host);
+#endif
+ }
+ qemu_free(block);
+ return;
+ }
+ }
+
}
/* Return a host pointer to ram allocated with qemu_ram_alloc.
*/
void *qemu_get_ram_ptr(ram_addr_t addr)
{
- RAMBlock *prev;
- RAMBlock **prevp;
RAMBlock *block;
- prev = NULL;
- prevp = &ram_blocks;
- block = ram_blocks;
- while (block && (block->offset > addr
- || block->offset + block->length <= addr)) {
- if (prev)
- prevp = &prev->next;
- prev = block;
- block = block->next;
- }
- if (!block) {
- fprintf(stderr, "Bad ram offset %" PRIx64 "\n", (uint64_t)addr);
- abort();
- }
- /* Move this entry to to start of the list. */
- if (prev) {
- prev->next = block->next;
- block->next = *prevp;
- *prevp = block;
+ QLIST_FOREACH(block, &ram_list.blocks, next) {
+ if (addr - block->offset < block->length) {
+ QLIST_REMOVE(block, next);
+ QLIST_INSERT_HEAD(&ram_list.blocks, block, next);
+ return block->host + (addr - block->offset);
+ }
}
- return block->host + (addr - block->offset);
+
+ fprintf(stderr, "Bad ram offset %" PRIx64 "\n", (uint64_t)addr);
+ abort();
+
+ return NULL;
}
/* Some of the softmmu routines need to translate from a host pointer
RAMBlock *block;
uint8_t *host = ptr;
- block = ram_blocks;
- while (block && (block->host > host
- || block->host + block->length <= host)) {
- block = block->next;
- }
- if (!block) {
- fprintf(stderr, "Bad ram pointer %p\n", ptr);
- abort();
+ QLIST_FOREACH(block, &ram_list.blocks, next) {
+ if (host - block->host < block->length) {
+ return block->offset + (host - block->host);
+ }
}
- return block->offset + (host - block->host);
+
+ fprintf(stderr, "Bad ram pointer %p\n", ptr);
+ abort();
+
+ return 0;
}
static uint32_t unassigned_mem_readb(void *opaque, target_phys_addr_t addr)
projects / qemu.git / blobdiff