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exec: check MRU in qemu_ram_addr_from_host 

This function is not used outside the iothread mutex, so it
can use ram_list.mru_block.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
master
Paolo Bonzini 2013-05-06 14:28:39 +02:00
parent dfde4e6e1a
commit 23887b79df
1 changed files with 10 additions and 2 deletions
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12
exec.c
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@ -1400,18 +1400,26 @@ int qemu_ram_addr_from_host(void *ptr, ram_addr_t *ram_addr)
return 0;
}
block = ram_list.mru_block;
if (block && block->host && host - block->host < block->length) {
goto found;
}
QTAILQ_FOREACH(block, &ram_list.blocks, next) {
/* This case append when the block is not mapped. */
if (block->host == NULL) {
continue;
}
if (host - block->host < block->length) {
*ram_addr = block->offset + (host - block->host);
return 0;
goto found;
}
}
return -1;
found:
*ram_addr = block->offset + (host - block->host);
return 0;
}
/* Some of the softmmu routines need to translate from a host pointer