From mboxrd@z Thu Jan  1 00:00:00 1970
From: Michael Ellerman <michael@ellerman.id.au>
Subject: Re: [PATCH] kvm tools: fix boot of guests with more than 4gb of ram
Date: Tue, 25 Jun 2013 10:58:12 +1000
Message-ID: <1372121892.11276.2.camel@concordia>
References: <1372037011-19466-1-git-send-email-sasha.levin@oracle.com>
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Cc: penberg@kernel.org, will.deacon@arm.com, kvm@vger.kernel.org
To: Sasha Levin <sasha.levin@oracle.com>
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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?

cheers