Re: [Xen-devel] [PATCH v6 2/2] add a new p2m type - p2m_mmio_write_dm

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 06.12.14 at 04:55, <yu.c.zhang@xxxxxxxxxxxxxxx> wrote:
> From: Yu Zhang <yu.c.zhang@xxxxxxxxx>
> 
> A new p2m type, p2m_mmio_write_dm, is added to trap and emulate
> the write operations on GPU's page tables. Handling of this new
> p2m type are similar with existing p2m_ram_ro in most condition
> checks, with only difference on final policy of emulation vs. drop.
> For p2m_ram_ro types, write operations will not trigger the device
> model, and will be discarded later in __hvm_copy(); while for the
> p2m_mmio_write_dm type pages, writes will go to the device model
> via ioreq-server.
> 
> Signed-off-by: Yu Zhang <yu.c.zhang@xxxxxxxxxxxxxxx>
> Signed-off-by: Wei Ye <wei.ye@xxxxxxxxx>

Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>


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