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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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7
exec.c
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@ -1448,6 +1448,13 @@ void qemu_ram_remap(ram_addr_t addr, ram_addr_t length)
}
#endif /* !_WIN32 */
int qemu_get_ram_fd(ram_addr_t addr)
{
RAMBlock *block = qemu_get_ram_block(addr);
return block->fd;
}
/* Return a host pointer to ram allocated with qemu_ram_alloc.
With the exception of the softmmu code in this file, this should
only be used for local memory (e.g. video ram) that the device owns,