exec: Return RAMBlock pointer from allocating functions

[qemu.git] / exec.c

diff --git a/exec.c b/exec.c
index 7d67c11601a09f1669a361a1d4282ee55aba2d8c..2b14b7954e5acf6bdb2ebfefff52fbd3a2762818 100644 (file)
--- a/exec.c
+++ b/exec.c
@@ -661,12 +661,6 @@ void cpu_exec_init(CPUState *cpu, Error **errp)
     if (qdev_get_vmsd(DEVICE(cpu)) == NULL) {
         vmstate_register(NULL, cpu_index, &vmstate_cpu_common, cpu);
     }
-#if defined(CPU_SAVE_VERSION) && !defined(CONFIG_USER_ONLY)
-    register_savevm(NULL, "cpu", cpu_index, CPU_SAVE_VERSION,
-                    cpu_save, cpu_load, cpu->env_ptr);
-    assert(cc->vmsd == NULL);
-    assert(qdev_get_vmsd(DEVICE(cpu)) == NULL);
-#endif
     if (cc->vmsd != NULL) {
         vmstate_register(NULL, cpu_index, cc->vmsd, cpu);
     }
@@ -1560,7 +1554,7 @@ static void dirty_memory_extend(ram_addr_t old_ram_size,
     }
 }
 
-static ram_addr_t ram_block_add(RAMBlock *new_block, Error **errp)
+static void ram_block_add(RAMBlock *new_block, Error **errp)
 {
     RAMBlock *block;
     RAMBlock *last_block = NULL;
@@ -1579,7 +1573,6 @@ static ram_addr_t ram_block_add(RAMBlock *new_block, Error **errp)
             if (err) {
                 error_propagate(errp, err);
                 qemu_mutex_unlock_ramlist();
-                return -1;
             }
         } else {
             new_block->host = phys_mem_alloc(new_block->max_length,
@@ -1589,7 +1582,6 @@ static ram_addr_t ram_block_add(RAMBlock *new_block, Error **errp)
                                  "cannot set up guest memory '%s'",
                                  memory_region_name(new_block->mr));
                 qemu_mutex_unlock_ramlist();
-                return -1;
             }
             memory_try_enable_merging(new_block->host, new_block->max_length);
         }
@@ -1637,22 +1629,19 @@ static ram_addr_t ram_block_add(RAMBlock *new_block, Error **errp)
             kvm_setup_guest_memory(new_block->host, new_block->max_length);
         }
     }
-
-    return new_block->offset;
 }
 
 #ifdef __linux__
-ram_addr_t qemu_ram_alloc_from_file(ram_addr_t size, MemoryRegion *mr,
-                                    bool share, const char *mem_path,
-                                    Error **errp)
+RAMBlock *qemu_ram_alloc_from_file(ram_addr_t size, MemoryRegion *mr,
+                                   bool share, const char *mem_path,
+                                   Error **errp)
 {
     RAMBlock *new_block;
-    ram_addr_t addr;
     Error *local_err = NULL;
 
     if (xen_enabled()) {
         error_setg(errp, "-mem-path not supported with Xen");
-        return -1;
+        return NULL;
     }
 
     if (phys_mem_alloc != qemu_anon_ram_alloc) {
@@ -1663,7 +1652,7 @@ ram_addr_t qemu_ram_alloc_from_file(ram_addr_t size, MemoryRegion *mr,
          */
         error_setg(errp,
                    "-mem-path not supported with this accelerator");
-        return -1;
+        return NULL;
     }
 
     size = HOST_PAGE_ALIGN(size);
@@ -1676,29 +1665,28 @@ ram_addr_t qemu_ram_alloc_from_file(ram_addr_t size, MemoryRegion *mr,
                                      mem_path, errp);
     if (!new_block->host) {
         g_free(new_block);
-        return -1;
+        return NULL;
     }
 
-    addr = ram_block_add(new_block, &local_err);
+    ram_block_add(new_block, &local_err);
     if (local_err) {
         g_free(new_block);
         error_propagate(errp, local_err);
-        return -1;
+        return NULL;
     }
-    return addr;
+    return new_block;
 }
 #endif
 
 static
-ram_addr_t qemu_ram_alloc_internal(ram_addr_t size, ram_addr_t max_size,
-                                   void (*resized)(const char*,
-                                                   uint64_t length,
-                                                   void *host),
-                                   void *host, bool resizeable,
-                                   MemoryRegion *mr, Error **errp)
+RAMBlock *qemu_ram_alloc_internal(ram_addr_t size, ram_addr_t max_size,
+                                  void (*resized)(const char*,
+                                                  uint64_t length,
+                                                  void *host),
+                                  void *host, bool resizeable,
+                                  MemoryRegion *mr, Error **errp)
 {
     RAMBlock *new_block;
-    ram_addr_t addr;
     Error *local_err = NULL;
 
     size = HOST_PAGE_ALIGN(size);
@@ -1717,27 +1705,28 @@ ram_addr_t qemu_ram_alloc_internal(ram_addr_t size, ram_addr_t max_size,
     if (resizeable) {
         new_block->flags |= RAM_RESIZEABLE;
     }
-    addr = ram_block_add(new_block, &local_err);
+    ram_block_add(new_block, &local_err);
     if (local_err) {
         g_free(new_block);
         error_propagate(errp, local_err);
-        return -1;
+        return NULL;
     }
-    return addr;
+    mr->ram_block = new_block;
+    return new_block;
 }
 
-ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size, void *host,
+RAMBlock *qemu_ram_alloc_from_ptr(ram_addr_t size, void *host,
                                    MemoryRegion *mr, Error **errp)
 {
     return qemu_ram_alloc_internal(size, size, NULL, host, false, mr, errp);
 }
 
-ram_addr_t qemu_ram_alloc(ram_addr_t size, MemoryRegion *mr, Error **errp)
+RAMBlock *qemu_ram_alloc(ram_addr_t size, MemoryRegion *mr, Error **errp)
 {
     return qemu_ram_alloc_internal(size, size, NULL, NULL, false, mr, errp);
 }
 
-ram_addr_t qemu_ram_alloc_resizeable(ram_addr_t size, ram_addr_t maxsz,
+RAMBlock *qemu_ram_alloc_resizeable(ram_addr_t size, ram_addr_t maxsz,
                                      void (*resized)(const char*,
                                                      uint64_t length,
                                                      void *host),
@@ -1872,9 +1861,13 @@ void *qemu_get_ram_block_host_ptr(ram_addr_t addr)
  *
  * Called within RCU critical section.
  */
-void *qemu_get_ram_ptr(ram_addr_t addr)
+void *qemu_get_ram_ptr(RAMBlock *ram_block, ram_addr_t addr)
 {
-    RAMBlock *block = qemu_get_ram_block(addr);
+    RAMBlock *block = ram_block;
+
+    if (block == NULL) {
+        block = qemu_get_ram_block(addr);
+    }
 
     if (xen_enabled() && block->host == NULL) {
         /* We need to check if the requested address is in the RAM
@@ -1895,15 +1888,18 @@ void *qemu_get_ram_ptr(ram_addr_t addr)
  *
  * Called within RCU critical section.
  */
-static void *qemu_ram_ptr_length(ram_addr_t addr, hwaddr *size)
+static void *qemu_ram_ptr_length(RAMBlock *ram_block, ram_addr_t addr,
+                                 hwaddr *size)
 {
-    RAMBlock *block;
+    RAMBlock *block = ram_block;
     ram_addr_t offset_inside_block;
     if (*size == 0) {
         return NULL;
     }
 
-    block = qemu_get_ram_block(addr);
+    if (block == NULL) {
+        block = qemu_get_ram_block(addr);
+    }
     offset_inside_block = addr - block->offset;
     *size = MIN(*size, block->max_length - offset_inside_block);
 
@@ -2031,13 +2027,13 @@ static void notdirty_mem_write(void *opaque, hwaddr ram_addr,
     }
     switch (size) {
     case 1:
-        stb_p(qemu_get_ram_ptr(ram_addr), val);
+        stb_p(qemu_get_ram_ptr(NULL, ram_addr), val);
         break;
     case 2:
-        stw_p(qemu_get_ram_ptr(ram_addr), val);
+        stw_p(qemu_get_ram_ptr(NULL, ram_addr), val);
         break;
     case 4:
-        stl_p(qemu_get_ram_ptr(ram_addr), val);
+        stl_p(qemu_get_ram_ptr(NULL, ram_addr), val);
         break;
     default:
         abort();
@@ -2070,6 +2066,7 @@ static const MemoryRegionOps notdirty_mem_ops = {
 static void check_watchpoint(int offset, int len, MemTxAttrs attrs, int flags)
 {
     CPUState *cpu = current_cpu;
+    CPUClass *cc = CPU_GET_CLASS(cpu);
     CPUArchState *env = cpu->env_ptr;
     target_ulong pc, cs_base;
     target_ulong vaddr;
@@ -2095,6 +2092,11 @@ static void check_watchpoint(int offset, int len, MemTxAttrs attrs, int flags)
             wp->hitaddr = vaddr;
             wp->hitattrs = attrs;
             if (!cpu->watchpoint_hit) {
+                if (wp->flags & BP_CPU &&
+                    !cc->debug_check_watchpoint(cpu, wp)) {
+                    wp->flags &= ~BP_WATCHPOINT_HIT;
+                    continue;
+                }
                 cpu->watchpoint_hit = wp;
                 tb_check_watchpoint(cpu);
                 if (wp->flags & BP_STOP_BEFORE_ACCESS) {
@@ -2607,7 +2609,7 @@ static MemTxResult address_space_write_continue(AddressSpace *as, hwaddr addr,
         } else {
             addr1 += memory_region_get_ram_addr(mr);
             /* RAM case */
-            ptr = qemu_get_ram_ptr(addr1);
+            ptr = qemu_get_ram_ptr(mr->ram_block, addr1);
             memcpy(ptr, buf, l);
             invalidate_and_set_dirty(mr, addr1, l);
         }
@@ -2698,7 +2700,7 @@ MemTxResult address_space_read_continue(AddressSpace *as, hwaddr addr,
             }
         } else {
             /* RAM case */
-            ptr = qemu_get_ram_ptr(mr->ram_addr + addr1);
+            ptr = qemu_get_ram_ptr(mr->ram_block, mr->ram_addr + addr1);
             memcpy(buf, ptr, l);
         }
 
@@ -2783,7 +2785,7 @@ static inline void cpu_physical_memory_write_rom_internal(AddressSpace *as,
         } else {
             addr1 += memory_region_get_ram_addr(mr);
             /* ROM/RAM case */
-            ptr = qemu_get_ram_ptr(addr1);
+            ptr = qemu_get_ram_ptr(mr->ram_block, addr1);
             switch (type) {
             case WRITE_DATA:
                 memcpy(ptr, buf, l);
@@ -2995,7 +2997,7 @@ void *address_space_map(AddressSpace *as,
 
     memory_region_ref(mr);
     *plen = done;
-    ptr = qemu_ram_ptr_length(raddr + base, plen);
+    ptr = qemu_ram_ptr_length(mr->ram_block, raddr + base, plen);
     rcu_read_unlock();
 
     return ptr;
@@ -3079,7 +3081,8 @@ static inline uint32_t address_space_ldl_internal(AddressSpace *as, hwaddr addr,
 #endif
     } else {
         /* RAM case */
-        ptr = qemu_get_ram_ptr((memory_region_get_ram_addr(mr)
+        ptr = qemu_get_ram_ptr(mr->ram_block,
+                               (memory_region_get_ram_addr(mr)
                                 & TARGET_PAGE_MASK)
                                + addr1);
         switch (endian) {
@@ -3174,7 +3177,8 @@ static inline uint64_t address_space_ldq_internal(AddressSpace *as, hwaddr addr,
 #endif
     } else {
         /* RAM case */
-        ptr = qemu_get_ram_ptr((memory_region_get_ram_addr(mr)
+        ptr = qemu_get_ram_ptr(mr->ram_block,
+                               (memory_region_get_ram_addr(mr)
                                 & TARGET_PAGE_MASK)
                                + addr1);
         switch (endian) {
@@ -3289,7 +3293,8 @@ static inline uint32_t address_space_lduw_internal(AddressSpace *as,
 #endif
     } else {
         /* RAM case */
-        ptr = qemu_get_ram_ptr((memory_region_get_ram_addr(mr)
+        ptr = qemu_get_ram_ptr(mr->ram_block,
+                               (memory_region_get_ram_addr(mr)
                                 & TARGET_PAGE_MASK)
                                + addr1);
         switch (endian) {
@@ -3374,7 +3379,7 @@ void address_space_stl_notdirty(AddressSpace *as, hwaddr addr, uint32_t val,
         r = memory_region_dispatch_write(mr, addr1, val, 4, attrs);
     } else {
         addr1 += memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK;
-        ptr = qemu_get_ram_ptr(addr1);
+        ptr = qemu_get_ram_ptr(mr->ram_block, addr1);
         stl_p(ptr, val);
 
         dirty_log_mask = memory_region_get_dirty_log_mask(mr);
@@ -3429,7 +3434,7 @@ static inline void address_space_stl_internal(AddressSpace *as,
     } else {
         /* RAM case */
         addr1 += memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK;
-        ptr = qemu_get_ram_ptr(addr1);
+        ptr = qemu_get_ram_ptr(mr->ram_block, addr1);
         switch (endian) {
         case DEVICE_LITTLE_ENDIAN:
             stl_le_p(ptr, val);
@@ -3539,7 +3544,7 @@ static inline void address_space_stw_internal(AddressSpace *as,
     } else {
         /* RAM case */
         addr1 += memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK;
-        ptr = qemu_get_ram_ptr(addr1);
+        ptr = qemu_get_ram_ptr(mr->ram_block, addr1);
         switch (endian) {
         case DEVICE_LITTLE_ENDIAN:
             stw_le_p(ptr, val);