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Fix wrong region_offset when overlaying a page with another 

cpu_register_physical_memory_log() does not update region_offset
if a page was previously registered for the same address.  This
could cause mmio accesses going to the wrong place, by using the
old region_offset.

Signed-off-by: Avi Kivity <avi@redhat.com>
Acked-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Avi Kivity 2012-01-01 18:24:24 +02:00
parent 26a83ad0e7
commit 2774c6d0ae
1 changed files with 1 additions and 0 deletions
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1
exec.c
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@ -2542,6 +2542,7 @@ void cpu_register_physical_memory_log(target_phys_addr_t start_addr,
p->region_offset = 0;
} else {
p->phys_offset = phys_offset;
p->region_offset = region_offset;
if ((phys_offset & ~TARGET_PAGE_MASK) <= IO_MEM_ROM ||
(phys_offset & IO_MEM_ROMD))
phys_offset += TARGET_PAGE_SIZE;