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[Qemu-devel] Recursion in cpu_physical_memory_rw
From: |
Herbert Xu |
Subject: |
[Qemu-devel] Recursion in cpu_physical_memory_rw |
Date: |
Wed, 15 Nov 2006 11:43:50 +1100 |
User-agent: |
Mutt/1.5.9i |
Hi:
A number of qemu driver backends (such as rtl8139) call the function
cpu_physical_memory_rw to read/write guest memory. The target guest
memory address is often supplied by the guest. This opens up the
possibility of a guest giving an address which happens to be an MMIO
address which can potentially lead to infinite recursion involving
cpu_physical_memory_rw.
Since these driver backends really only need to access system memory,
we could simply provide a new access interface that does not allow
MMIO addresses.
Any comments on this problem?
Cheers,
--
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