From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: Eric Camachat <eric.camachat@gmail.com>
Cc: xen-devel@lists.xensource.com
Subject: Re: Can I specify a physical memory region for a domU
Date: Thu, 8 Sep 2011 21:05:50 -0400 [thread overview]
Message-ID: <20110909010550.GB9060@dumpdata.com> (raw)
In-Reply-To: <CACeEFf7_5XK7YzCaEaickhu5KmKDsQ9LxibeZ4acFq2+7D2SkQ@mail.gmail.com>
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
> <konrad.wilk@oracle.com> wrote:
> >> > Make sure you set
> >> > pci_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 kernel.
> > You use the DMA API in it to deal with the PCI devices.
> >
> > Is the PV domU a Linux kernel or something else?
> >
>
> Yes, the PV domU is linux kernel.
>
> I tested pci_alloc_consistent() verified on baremetal it worked with 8GB 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?
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel
next prev parent reply other threads:[~2011-09-09 1:05 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-08 0:47 Can I specify a physical memory region for a domU Eric Camachat
2011-09-08 8:50 ` Tim Deegan
2011-09-08 12:59 ` Konrad Rzeszutek Wilk
2011-09-08 17:22 ` Eric Camachat
2011-09-08 18:12 ` Konrad Rzeszutek Wilk
2011-09-08 18:56 ` Eric Camachat
2011-09-08 20:00 ` Konrad Rzeszutek Wilk
2011-09-09 0:15 ` Eric Camachat
2011-09-09 1:05 ` Konrad Rzeszutek Wilk [this message]
2011-09-09 16:10 ` Eric Camachat
2011-09-09 16:48 ` Eric Camachat
2011-09-09 18:06 ` Konrad Rzeszutek Wilk
2011-09-09 19:19 ` Eric Camachat
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