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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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10
include/exec/memory.h
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@ -533,6 +533,16 @@ bool memory_region_is_logging(MemoryRegion *mr);
*/
bool memory_region_is_rom(MemoryRegion *mr);
/**
* memory_region_get_fd: Get a file descriptor backing a RAM memory region.
*
* Returns a file descriptor backing a file-based RAM memory region,
* or -1 if the region is not a file-based RAM memory region.
*
* @mr: the RAM or alias memory region being queried.
*/
int memory_region_get_fd(MemoryRegion *mr);
/**
* memory_region_get_ram_ptr: Get a pointer into a RAM memory region.
*