[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-devel] [PATCH v10 0/8] xen/arm: introduce GNTTABOP_cache_flush

Hi Stefano,

On 10/21/2014 07:10 PM, Stefano Stabellini wrote:
> Hi all,
> this patch series introduces a new hypercall to perform cache
> maintenance operations on behalf of the guest. It is useful for dom0 to
> be able to cache flush pages involved in a dma operation with
> non-coherent devices.
> It also removes XENFEAT_grant_map_identity as the feature is no longer
> necessary: it was used to achieve the same goal but the guest can now
> use the hypercall instead. Keeping the flag would also have a
> significant performance impact as a new p2m mapping gets created and
> then destroyed for every grant that is mapped and unmapped in dom0.

I don't remembered if I asked before. Do you plan to write somewhere
(wiki page, release note...) that some version of Linux (IIRC Linux 3.16
and 3.17) are broken when running as DOM0?


Julien Grall

Xen-devel mailing list



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.