Merge remote-tracking branch 'qemu-kvm/memory/core' into staging

* qemu-kvm/memory/core:
  memory: get rid of cpu_register_io_memory()
  memory: dispatch directly via MemoryRegion
  exec: fix code tlb entry misused as iotlb in get_page_addr_code()
  memory: store section indices in iotlb instead of io indices
  memory: make phys_page_find() return an unadjusted section

cpu-all.h

@@ -498,14 +498,6 @@ extern RAMList ram_list;
 extern const char *mem_path;
 extern int mem_prealloc;
 
-/* physical memory access */
-
-/* MMIO pages are identified by a combination of an IO device index and
-   3 flags.  The ROMD code stores the page ram offset in iotlb entry, 
-   so only a limited number of ids are avaiable.  */
-
-#define IO_MEM_NB_ENTRIES  (1 << TARGET_PAGE_BITS)
-
 /* Flags stored in the low bits of the TLB virtual address.  These are
    defined so that fast path ram access is all zeros.  */
 /* Zero if TLB entry is valid.  */

exec-all.h

@@ -299,10 +299,11 @@ extern void *tci_tb_ptr;
 
 #if !defined(CONFIG_USER_ONLY)
 
-uint64_t io_mem_read(int index, target_phys_addr_t addr, unsigned size);
-void io_mem_write(int index, target_phys_addr_t addr, uint64_t value,
-                  unsigned size);
-extern struct MemoryRegion *io_mem_region[IO_MEM_NB_ENTRIES];
+struct MemoryRegion *iotlb_to_region(target_phys_addr_t index);
+uint64_t io_mem_read(struct MemoryRegion *mr, target_phys_addr_t addr,
+                     unsigned size);
+void io_mem_write(struct MemoryRegion *mr, target_phys_addr_t addr,
+                  uint64_t value, unsigned size);
 
 void tlb_fill(CPUState *env1, target_ulong addr, int is_write, int mmu_idx,
               void *retaddr);

exec-obsolete.h

@@ -32,9 +32,6 @@ void qemu_ram_free(ram_addr_t addr);
 void qemu_ram_free_from_ptr(ram_addr_t addr);
 
 struct MemoryRegion;
-int cpu_register_io_memory(MemoryRegion *mr);
-void cpu_unregister_io_memory(int table_address);
-
 struct MemoryRegionSection;
 void cpu_register_physical_memory_log(struct MemoryRegionSection *section,
                                       bool readonly);

memory.c

@@ -781,13 +781,11 @@ static void memory_region_destructor_ram_from_ptr(MemoryRegion *mr)
 
 static void memory_region_destructor_iomem(MemoryRegion *mr)
 {
-    cpu_unregister_io_memory(mr->ram_addr);
 }
 
 static void memory_region_destructor_rom_device(MemoryRegion *mr)
 {
     qemu_ram_free(mr->ram_addr & TARGET_PAGE_MASK);
-    cpu_unregister_io_memory(mr->ram_addr & ~TARGET_PAGE_MASK);
 }
 
 static bool memory_region_wrong_endianness(MemoryRegion *mr)
@@ -942,7 +940,7 @@ void memory_region_init_io(MemoryRegion *mr,
     mr->opaque = opaque;
     mr->terminates = true;
     mr->destructor = memory_region_destructor_iomem;
-    mr->ram_addr = cpu_register_io_memory(mr);
+    mr->ram_addr = ~(ram_addr_t)0;
 }
 
 void memory_region_init_ram(MemoryRegion *mr,
@@ -992,7 +990,6 @@ void memory_region_init_rom_device(MemoryRegion *mr,
     mr->rom_device = true;
     mr->destructor = memory_region_destructor_rom_device;
     mr->ram_addr = qemu_ram_alloc(size, mr);
-    mr->ram_addr |= cpu_register_io_memory(mr);
 }
 
 static uint64_t invalid_read(void *opaque, target_phys_addr_t addr,
@@ -1501,15 +1498,15 @@ void set_system_io_map(MemoryRegion *mr)
     memory_region_update_topology(NULL);
 }
 
-uint64_t io_mem_read(int io_index, target_phys_addr_t addr, unsigned size)
+uint64_t io_mem_read(MemoryRegion *mr, target_phys_addr_t addr, unsigned size)
 {
-    return memory_region_dispatch_read(io_mem_region[io_index], addr, size);
+    return memory_region_dispatch_read(mr, addr, size);
 }
 
-void io_mem_write(int io_index, target_phys_addr_t addr,
+void io_mem_write(MemoryRegion *mr, target_phys_addr_t addr,
                   uint64_t val, unsigned size)
 {
-    memory_region_dispatch_write(io_mem_region[io_index], addr, val, size);
+    memory_region_dispatch_write(mr, addr, val, size);
 }
 
 typedef struct MemoryRegionList MemoryRegionList;

softmmu_template.h

@@ -62,27 +62,27 @@ static inline DATA_TYPE glue(io_read, SUFFIX)(target_phys_addr_t physaddr,
                                               void *retaddr)
 {
     DATA_TYPE res;
-    int index;
-    index = physaddr & (IO_MEM_NB_ENTRIES - 1);
+    MemoryRegion *mr = iotlb_to_region(physaddr);
+
     physaddr = (physaddr & TARGET_PAGE_MASK) + addr;
     env->mem_io_pc = (unsigned long)retaddr;
-    if (index != io_mem_ram.ram_addr && index != io_mem_rom.ram_addr
-        && index != io_mem_unassigned.ram_addr
-        && index != io_mem_notdirty.ram_addr
+    if (mr != &io_mem_ram && mr != &io_mem_rom
+        && mr != &io_mem_unassigned
+        && mr != &io_mem_notdirty
             && !can_do_io(env)) {
         cpu_io_recompile(env, retaddr);
     }
 
     env->mem_io_vaddr = addr;
 #if SHIFT <= 2
-    res = io_mem_read(index, physaddr, 1 << SHIFT);
+    res = io_mem_read(mr, physaddr, 1 << SHIFT);
 #else
 #ifdef TARGET_WORDS_BIGENDIAN
-    res = io_mem_read(index, physaddr, 4) << 32;
-    res |= io_mem_read(index, physaddr + 4, 4);
+    res = io_mem_read(mr, physaddr, 4) << 32;
+    res |= io_mem_read(mr, physaddr + 4, 4);
 #else
-    res = io_mem_read(index, physaddr, 4);
-    res |= io_mem_read(index, physaddr + 4, 4) << 32;
+    res = io_mem_read(mr, physaddr, 4);
+    res |= io_mem_read(mr, physaddr + 4, 4) << 32;
 #endif
 #endif /* SHIFT > 2 */
     return res;
@@ -207,12 +207,12 @@ static inline void glue(io_write, SUFFIX)(target_phys_addr_t physaddr,
                                           target_ulong addr,
                                           void *retaddr)
 {
-    int index;
-    index = physaddr & (IO_MEM_NB_ENTRIES - 1);
+    MemoryRegion *mr = iotlb_to_region(physaddr);
+
     physaddr = (physaddr & TARGET_PAGE_MASK) + addr;
-    if (index != io_mem_ram.ram_addr && index != io_mem_rom.ram_addr
-        && index != io_mem_unassigned.ram_addr
-        && index != io_mem_notdirty.ram_addr
+    if (mr != &io_mem_ram && mr != &io_mem_rom
+        && mr != &io_mem_unassigned
+        && mr != &io_mem_notdirty
             && !can_do_io(env)) {
         cpu_io_recompile(env, retaddr);
     }
@@ -220,14 +220,14 @@ static inline void glue(io_write, SUFFIX)(target_phys_addr_t physaddr,
     env->mem_io_vaddr = addr;
     env->mem_io_pc = (unsigned long)retaddr;
 #if SHIFT <= 2
-    io_mem_write(index, physaddr, val, 1 << SHIFT);
+    io_mem_write(mr, physaddr, val, 1 << SHIFT);
 #else
 #ifdef TARGET_WORDS_BIGENDIAN
-    io_mem_write(index, physaddr, (val >> 32), 4);
-    io_mem_write(index, physaddr + 4, (uint32_t)val, 4);
+    io_mem_write(mr, physaddr, (val >> 32), 4);
+    io_mem_write(mr, physaddr + 4, (uint32_t)val, 4);
 #else
-    io_mem_write(index, physaddr, (uint32_t)val, 4);
-    io_mem_write(index, physaddr + 4, val >> 32, 4);
+    io_mem_write(mr, physaddr, (uint32_t)val, 4);
+    io_mem_write(mr, physaddr + 4, val >> 32, 4);
 #endif
 #endif /* SHIFT > 2 */
 }