From mboxrd@z Thu Jan 1 00:00:00 1970 From: Konrad Rzeszutek Wilk Subject: Re: Can I specify a physical memory region for a domU Date: Thu, 8 Sep 2011 21:05:50 -0400 Message-ID: <20110909010550.GB9060@dumpdata.com> References: <20110908125920.GC28591@dumpdata.com> <20110908181205.GA19078@dumpdata.com> <20110908200038.GB21186@dumpdata.com> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Return-path: Content-Disposition: inline In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Eric Camachat Cc: xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org On Thu, Sep 08, 2011 at 05:15:06PM -0700, Eric Camachat wrote: > On Thu, Sep 8, 2011 at 1:00 PM, Konrad Rzeszutek Wilk > wrote: > >> > Make sure you set > >> > =A0pci_set_consistent_dma_mask(dev, DMA_BIT_MASK(31)); > >> > > >> > on top of pci_set_dma_mask(dev, DMA_BIT_MASK(31)); > >> > in your driver. > >> > > >> A lot of work to port the driver to PV domU, hope it works. > > > > Hm? That is the normal way you would write drivers in the Linux kerne= l. > > You use the DMA API in it to deal with the PCI devices. > > > > Is the PV domU a Linux kernel or something else? > > >=20 > Yes, the PV domU is linux kernel. >=20 > I tested pci_alloc_consistent() verified on baremetal it worked with 8G= B SDRAM. > But while I ran it in XEN, pci_alloc_consistent() cannot allocate > memory successfully for 4MB although pci_set_dma_mask(), And what is the error? > pci_set_consistent_dma_mask() and dma_set_mask() all succeeded. And what kernel did you use? >=20 > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel