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Revert "exec: Respect as_tranlsate_internal length clamp"

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This reverts commit c3c1bb9.
It causes problems with boards that declare memory regions shorter
than the registers they contain.

Backports commit 4025446f0ac6213335c22ec43f3c3d8362ce7286 from qemu
This commit is contained in:
Paolo Bonzini 2018-02-18 19:07:21 -05:00 committed by Lioncash
parent 1cc51e4b53
commit aad1027c96
No known key found for this signature in database
GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 3 additions and 1 deletions
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4
qemu/exec.c
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@ -349,6 +349,7 @@ MemoryRegion *address_space_translate(AddressSpace *as, hwaddr addr,
IOMMUTLBEntry iotlb;
MemoryRegionSection *section;
MemoryRegion *mr;
hwaddr len = *plen;
for (;;) {
section = address_space_translate_internal(as->dispatch, addr, &addr, plen, true);
@ -363,7 +364,7 @@ MemoryRegion *address_space_translate(AddressSpace *as, hwaddr addr,
iotlb = mr->iommu_ops->translate(mr, addr, is_write);
addr = ((iotlb.translated_addr & ~iotlb.addr_mask)
| (addr & iotlb.addr_mask));
*plen = MIN(*plen, (addr | iotlb.addr_mask) - addr + 1);
len = MIN(len, (addr | iotlb.addr_mask) - addr + 1);
if (!(iotlb.perm & (1 << is_write))) {
mr = &as->uc->io_mem_unassigned;
break;
@ -372,6 +373,7 @@ MemoryRegion *address_space_translate(AddressSpace *as, hwaddr addr,
as = iotlb.target_as;
}
*plen = len;
*xlat = addr;
return mr;
}