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exec: Limit translation limiting in address_space_translate to xen

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The address_space_translate() function cuts the returned plen (page size)
to hardcoded TARGET_PAGE_SIZE. This function can be used on pages bigger
than that so this limiting should not be used on such pages.

Since originally the limiting was introduced for XEN, we can safely
limit this piece of code to XEN. So does the patch.

Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
This commit is contained in:
Alexey Kardashevskiy 2014-05-07 13:40:39 +00:00 committed by Stefano Stabellini
parent 8d1dc5d188
commit fe680d0dac
1 changed files with 1 additions and 1 deletions
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2
exec.c
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@ -380,7 +380,7 @@ MemoryRegion *address_space_translate(AddressSpace *as, hwaddr addr,
as = iotlb.target_as;
}
if (memory_access_is_direct(mr, is_write)) {
if (xen_enabled() && memory_access_is_direct(mr, is_write)) {
hwaddr page = ((addr & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE) - addr;
len = MIN(page, len);
}