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Re: [PATCH 3/7] x86/PVH: deny Dom0 access to the ISA DMA controller
- To: Jan Beulich <jbeulich@xxxxxxxx>
- From: Roger Pau Monné <roger.pau@xxxxxxxxxx>
- Date: Wed, 25 Oct 2023 15:22:09 +0200
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- Cc: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>
- Delivery-date: Wed, 25 Oct 2023 13:22:41 +0000
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- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On Thu, May 11, 2023 at 02:06:25PM +0200, Jan Beulich wrote:
> Unlike PV, a PVH Dom0 has no sensible way of driving the address and
> page registers correctly, as it would need to translate guest physical
> addresses to host ones. Rather than allowing data corruption to occur
> from e.g. the use of a legacy floppy drive, disallow access altogether.
>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
Acked-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
Thanks, Roger.
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