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memory: move mem_path handling to memory_region_allocate_system_memory

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Like the previous patch did in exec.c, split memory_region_init_ram and
memory_region_init_ram_from_file, and push mem_path one step further up.
Other RAM regions than system memory will now be backed by regular RAM.

Also, boards that do not use memory_region_allocate_system_memory will
not support -mem-path anymore.  This can be changed before the patches
are merged by migrating boards to use the function.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Hu Tao <hutao@cn.fujitsu.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Paolo Bonzini 2014-05-14 17:43:19 +08:00 committed by Michael S. Tsirkin
parent 7febe36f9a
commit 0b183fc871
4 changed files with 46 additions and 14 deletions
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10
exec.c
View File

@ -1090,14 +1090,6 @@ error:
}
return NULL;
}
#else
static void *file_ram_alloc(RAMBlock *block,
ram_addr_t memory,
const char *path)
{
fprintf(stderr, "-mem-path not supported on this host\n");
exit(1);
}
#endif
static ram_addr_t find_ram_offset(ram_addr_t size)
@ -1287,6 +1279,7 @@ static ram_addr_t ram_block_add(RAMBlock *new_block)
return new_block->offset;
}
#ifdef __linux__
ram_addr_t qemu_ram_alloc_from_file(ram_addr_t size, MemoryRegion *mr,
const char *mem_path)
{
@ -1315,6 +1308,7 @@ ram_addr_t qemu_ram_alloc_from_file(ram_addr_t size, MemoryRegion *mr,
new_block->host = file_ram_alloc(new_block, size, mem_path);
return ram_block_add(new_block);
}
#endif
ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size, void *host,
MemoryRegion *mr)

18
include/exec/memory.h
View File

@ -311,6 +311,24 @@ void memory_region_init_ram(MemoryRegion *mr,
const char *name,
uint64_t size);
#ifdef __linux__
/**
* memory_region_init_ram_from_file: Initialize RAM memory region with a
* mmap-ed backend.
*
* @mr: the #MemoryRegion to be initialized.
* @owner: the object that tracks the region's reference count
* @name: the name of the region.
* @size: size of the region.
* @path: the path in which to allocate the RAM.
*/
void memory_region_init_ram_from_file(MemoryRegion *mr,
struct Object *owner,
const char *name,
uint64_t size,
const char *path);
#endif
/**
* memory_region_init_ram_ptr: Initialize RAM memory region from a
* user-provided pointer. Accesses into the

21
memory.c
View File

@ -1030,13 +1030,24 @@ void memory_region_init_ram(MemoryRegion *mr,
mr->ram = true;
mr->terminates = true;
mr->destructor = memory_region_destructor_ram;
if (mem_path) {
mr->ram_addr = qemu_ram_alloc_from_file(size, mr, mem_path);
} else {
mr->ram_addr = qemu_ram_alloc(size, mr);
}
mr->ram_addr = qemu_ram_alloc(size, mr);
}
#ifdef __linux__
void memory_region_init_ram_from_file(MemoryRegion *mr,
struct Object *owner,
const char *name,
uint64_t size,
const char *path)
{
memory_region_init(mr, owner, name, size);
mr->ram = true;
mr->terminates = true;
mr->destructor = memory_region_destructor_ram;
mr->ram_addr = qemu_ram_alloc_from_file(size, mr, path);
}
#endif
void memory_region_init_ram_ptr(MemoryRegion *mr,
Object *owner,
const char *name,

11
numa.c
View File

@ -228,7 +228,16 @@ static void allocate_system_memory_nonnuma(MemoryRegion *mr, Object *owner,
const char *name,
uint64_t ram_size)
{
memory_region_init_ram(mr, owner, name, ram_size);
if (mem_path) {
#ifdef __linux__
memory_region_init_ram_from_file(mr, owner, name, ram_size, mem_path);
#else
fprintf(stderr, "-mem-path not supported on this host\n");
exit(1);
#endif
} else {
memory_region_init_ram(mr, owner, name, ram_size);
}
vmstate_register_ram_global(mr);
}