On 06/24/2013 08:58 PM, Michael Ellerman wrote:
On Sun, 2013-06-23 at 21:23 -0400, Sasha Levin wrote:
Commit "kvm tools: virtio: remove hardcoded assumptions
about guest page size" has introduced a bug that prevented
guests with more than 4gb of ram from booting.
The issue is that 'pfn' is a 32bit integer, so when multiplying
it by page size to get the actual page will cause an overflow if
the pfn referred to a memory area above 4gb.
Couldn't we just make pfn 64 bit?
pfn is passed to us by the guest virtio driver, and is 32 bit.
Thanks,
Sasha
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