From: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Date: Fri, 21 Nov 2014 11:08:39 +0000 (+0000)
Subject: xen/arm: introduce GNTTABOP_cache_flush
X-Git-Tag: omap-for-v3.19/fixes-rc1~121^2~15
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=da095a996090a412c3b6292c7a8680661dca157d;p=pandora-kernel.git

xen/arm: introduce GNTTABOP_cache_flush

Introduce support for new hypercall GNTTABOP_cache_flush.
Use it to perform cache flashing on pages used for dma when necessary.

If GNTTABOP_cache_flush is supported by the hypervisor, we don't need to
bounce dma map operations that involve foreign grants and non-coherent
devices.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
---

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