memory, xen: pass MemoryRegion to xen_ram_alloc()

Currently xen_ram_alloc() relies on ram_addr, which is going away.
Give it something else to use as a cookie.
Signed-off-by: NAvi Kivity <avi@redhat.com>

cpu-common.h

@@ -61,9 +61,12 @@ static inline void cpu_register_physical_memory(target_phys_addr_t start_addr,
 }
 
 ram_addr_t cpu_get_physical_page_desc(target_phys_addr_t addr);
+struct MemoryRegion;
 ram_addr_t qemu_ram_alloc_from_ptr(DeviceState *dev, const char *name,
-                        ram_addr_t size, void *host);
-ram_addr_t qemu_ram_alloc(DeviceState *dev, const char *name, ram_addr_t size);
+                                   ram_addr_t size, void *host,
+                                   struct MemoryRegion *mr);
+ram_addr_t qemu_ram_alloc(DeviceState *dev, const char *name, ram_addr_t size,
+                          struct MemoryRegion *mr);
 void qemu_ram_free(ram_addr_t addr);
 void qemu_ram_free_from_ptr(ram_addr_t addr);
 void qemu_ram_remap(ram_addr_t addr, ram_addr_t length);

exec.c

@@ -2916,7 +2916,8 @@ static ram_addr_t last_ram_offset(void)
 }
 
 ram_addr_t qemu_ram_alloc_from_ptr(DeviceState *dev, const char *name,
-                                   ram_addr_t size, void *host)
+                                   ram_addr_t size, void *host,
+                                   MemoryRegion *mr)
 {
     RAMBlock *new_block, *block;
 
@@ -2972,7 +2973,7 @@ ram_addr_t qemu_ram_alloc_from_ptr(DeviceState *dev, const char *name,
             }
 #else
             if (xen_enabled()) {
-                xen_ram_alloc(new_block->offset, size);
+                xen_ram_alloc(new_block->offset, size, mr);
             } else {
                 new_block->host = qemu_vmalloc(size);
             }
@@ -2995,9 +2996,10 @@ ram_addr_t qemu_ram_alloc_from_ptr(DeviceState *dev, const char *name,
     return new_block->offset;
 }
 
-ram_addr_t qemu_ram_alloc(DeviceState *dev, const char *name, ram_addr_t size)
+ram_addr_t qemu_ram_alloc(DeviceState *dev, const char *name, ram_addr_t size,
+                          MemoryRegion *mr)
 {
-    return qemu_ram_alloc_from_ptr(dev, name, size, NULL);
+    return qemu_ram_alloc_from_ptr(dev, name, size, NULL, mr);
 }
 
 void qemu_ram_free_from_ptr(ram_addr_t addr)

hw/xen.h

@@ -44,7 +44,9 @@ void xen_vcpu_init(void);
 void xenstore_store_pv_console_info(int i, struct CharDriverState *chr);
 
 #if defined(NEED_CPU_H) && !defined(CONFIG_USER_ONLY)
-void xen_ram_alloc(ram_addr_t ram_addr, ram_addr_t size);
+struct MemoryRegion;
+void xen_ram_alloc(ram_addr_t ram_addr, ram_addr_t size,
+                   struct MemoryRegion *mr);
 #endif
 
 #if defined(CONFIG_XEN) && CONFIG_XEN_CTRL_INTERFACE_VERSION < 400

memory.c

@@ -982,7 +982,7 @@ void memory_region_init_ram(MemoryRegion *mr,
     memory_region_init(mr, name, size);
     mr->terminates = true;
     mr->destructor = memory_region_destructor_ram;
-    mr->ram_addr = qemu_ram_alloc(dev, name, size);
+    mr->ram_addr = qemu_ram_alloc(dev, name, size, mr);
     mr->backend_registered = true;
 }
 
@@ -995,7 +995,7 @@ void memory_region_init_ram_ptr(MemoryRegion *mr,
     memory_region_init(mr, name, size);
     mr->terminates = true;
     mr->destructor = memory_region_destructor_ram_from_ptr;
-    mr->ram_addr = qemu_ram_alloc_from_ptr(dev, name, size, ptr);
+    mr->ram_addr = qemu_ram_alloc_from_ptr(dev, name, size, ptr, mr);
     mr->backend_registered = true;
 }
 
@@ -1022,7 +1022,7 @@ void memory_region_init_rom_device(MemoryRegion *mr,
     mr->opaque = opaque;
     mr->terminates = true;
     mr->destructor = memory_region_destructor_rom_device;
-    mr->ram_addr = qemu_ram_alloc(dev, name, size);
+    mr->ram_addr = qemu_ram_alloc(dev, name, size, mr);
     mr->ram_addr |= cpu_register_io_memory(memory_region_read_thunk,
                                            memory_region_write_thunk,
                                            mr,

xen-all.c

@@ -181,7 +181,7 @@ static void xen_ram_init(ram_addr_t ram_size)
     }
 }
 
-void xen_ram_alloc(ram_addr_t ram_addr, ram_addr_t size)
+void xen_ram_alloc(ram_addr_t ram_addr, ram_addr_t size, MemoryRegion *mr)
 {
     unsigned long nr_pfn;
     xen_pfn_t *pfn_list;

xen-stub.c

@@ -8,6 +8,7 @@
 
 #include "qemu-common.h"
 #include "hw/xen.h"
+#include "memory.h"
 
 void xenstore_store_pv_console_info(int i, CharDriverState *chr)
 {
@@ -30,7 +31,7 @@ void xen_cmos_set_s3_resume(void *opaque, int irq, int level)
 {
 }
 
-void xen_ram_alloc(ram_addr_t ram_addr, ram_addr_t size)
+void xen_ram_alloc(ram_addr_t ram_addr, ram_addr_t size, MemoryRegion *mr)
 {
 }