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Merge remote-tracking branch 'remotes/sstabellini/xen-140130' into staging

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* remotes/sstabellini/xen-140130:
  address_space_translate: do not cross page boundaries

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2014-02-01 20:43:07 +00:00
commit bd88091cfb
1 changed files with 4 additions and 2 deletions
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6
exec.c
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@ -325,7 +325,7 @@ address_space_translate_internal(AddressSpaceDispatch *d, hwaddr addr, hwaddr *x
hwaddr *plen, bool resolve_subpage)
{
MemoryRegionSection *section;
Int128 diff;
Int128 diff, diff_page;
section = address_space_lookup_region(d, addr, resolve_subpage);
/* Compute offset within MemoryRegionSection */
@ -334,7 +334,9 @@ address_space_translate_internal(AddressSpaceDispatch *d, hwaddr addr, hwaddr *x
/* Compute offset within MemoryRegion */
*xlat = addr + section->offset_within_region;
diff_page = int128_make64(((addr & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE) - addr);
diff = int128_sub(section->mr->size, int128_make64(addr));
diff = int128_min(diff, diff_page);
*plen = int128_get64(int128_min(diff, int128_make64(*plen)));
return section;
}
@ -349,7 +351,7 @@ MemoryRegion *address_space_translate(AddressSpace *as, hwaddr addr,
hwaddr len = *plen;
for (;;) {
section = address_space_translate_internal(as->dispatch, addr, &addr, plen, true);
section = address_space_translate_internal(as->dispatch, addr, &addr, &len, true);
mr = section->mr;
if (!mr->iommu_ops) {