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hostmem: allow preallocation of any memory region

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And allow preallocation of file-based memory even without -mem-prealloc.
Some care is necessary because -mem-prealloc does not allow disabling
preallocation for hostmem-file.

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 2014-06-10 19:15:23 +08:00 • committed by Michael S. Tsirkin
parent 605d0a945d
commit a35ba7be4b
7 changed files with 75 additions and 0 deletions
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11
memory.c
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@ -1271,6 +1271,17 @@ void memory_region_reset_dirty(MemoryRegion *mr, hwaddr addr,
cpu_physical_memory_reset_dirty(mr->ram_addr + addr, size, client);
}
int memory_region_get_fd(MemoryRegion *mr)
{
if (mr->alias) {
return memory_region_get_fd(mr->alias);
}
assert(mr->terminates);
return qemu_get_ram_fd(mr->ram_addr & TARGET_PAGE_MASK);
}
void *memory_region_get_ram_ptr(MemoryRegion *mr)
{
if (mr->alias) {