From 4025446f0ac6213335c22ec43f3c3d8362ce7286 Mon Sep 17 00:00:00 2001
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Wed, 1 Apr 2015 09:57:45 +0200
Subject: [PATCH] Revert "exec: Respect as_tranlsate_internal length clamp"
This reverts commit c3c1bb99d1c11978d9ce94d1bdcf0705378c1459.
It causes problems with boards that declare memory regions shorter
than the registers they contain.
Reported-by: Zoltan Balaton <balaton@eik.bme.hu>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
exec.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/exec.c b/exec.c
index 6d1e1e4c75..874ecfc2c6 100644
--- a/exec.c
+++ b/exec.c
@@ -380,6 +380,7 @@ MemoryRegion *address_space_translate(AddressSpace *as, hwaddr addr,
IOMMUTLBEntry iotlb;
MemoryRegionSection *section;
MemoryRegion *mr;
+ hwaddr len = *plen;
rcu_read_lock();
for (;;) {
@@ -394,7 +395,7 @@ 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 = &io_mem_unassigned;
break;
@@ -405,9 +406,10 @@ MemoryRegion *address_space_translate(AddressSpace *as, hwaddr addr,
if (xen_enabled() && memory_access_is_direct(mr, is_write)) {
hwaddr page = ((addr & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE) - addr;
- *plen = MIN(page, *plen);
+ len = MIN(page, len);
}
+ *plen = len;
*xlat = addr;
rcu_read_unlock();
return mr;
--
2.30.2