Il 03/03/2014 11:47, Alexey Kardashevskiy ha scritto:
> > Sorry, I am not following you here. Does KVM map things not page-aligned?
>
> Look in exec.c for xen_enabled(). Xen's implementation of
> address_space_map/unmap is completely different.
Honestly cannot see much difference in the current QEMU...
void *qemu_get_ram_ptr(ram_addr_t addr)
{
RAMBlock *block = qemu_get_ram_block(addr);
if (xen_enabled()) {
/* We need to check if the requested address is in the RAM
* because we don't want to map the entire memory in QEMU.
* In that case just map until the end of the page.
*/
if (block->offset == 0) {
return xen_map_cache(addr, 0, 0);
} else if (block->host == NULL) {
block->host =
xen_map_cache(block->offset, block->length, 1);
}
}
return block->host + (addr - block->offset);
}
Paolo
