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Message-ID: <5457609D.2000200@citrix.com> Date: Mon, 3 Nov 2014 11:01:49 +0000 From: David Vrabel <david.vrabel@...rix.com> To: Stefano Stabellini <stefano.stabellini@...citrix.com> CC: <xen-devel@...ts.xensource.com>, <Ian.Campbell@...rix.com>, <linux-kernel@...r.kernel.org>, <david.vrabel@...rix.com>, <linux-arm-kernel@...ts.infradead.org> Subject: Re: [Xen-devel] [PATCH v7 7/8] xen/arm/arm64: introduce xen_arch_need_swiotlb On 03/11/14 10:45, Stefano Stabellini wrote: > On Mon, 27 Oct 2014, Stefano Stabellini wrote: >> Introduce an arch specific function to find out whether a particular dma >> mapping operation needs to bounce on the swiotlb buffer. >> >> On ARM and ARM64, if the page involved is a foreign page and the device >> is not coherent, we need to bounce because at unmap time we cannot >> execute any required cache maintenance operations (we don't know how to >> find the pfn from the mfn). >> >> No change of behaviour for x86. >> >> Signed-off-by: Stefano Stabellini <stefano.stabellini@...citrix.com> >> Acked-by: Ian Campbell <ian.campbell@...rix.com> > > Konrad, David, are you OK with the swiotlb-xen changes? Reviewed-by: David Vrabel <david.vrabel@...rix.com> But swiotlb is Konrad's responsibility. David -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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