Re: [PATCH 9/9] x86: Detect whether we should use Xen SWIOTLB.

From: H. Peter Anvin
Date: Tue Jul 27 2010 - 15:05:10 EST

On 07/27/2010 10:00 AM, Konrad Rzeszutek Wilk wrote:
> It is paramount that we call pci_xen_swiotlb_detect before
> pci_swiotlb_detect as both implementations use the 'swiotlb'
> and 'swiotlb_force' flags. The pci-xen_swiotlb_detect inhibits
> the swiotlb_force and swiotlb flag so that the native SWIOTLB
> implementation is not enabled when running under Xen.
> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
> Acked-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
> Cc: FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx>
> Cc: Albert Herranz <albert_herranz@xxxxxxxx>
> Cc: Ian Campbell <Ian.Campbell@xxxxxxxxxx>
> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
> Cc: x86@xxxxxxxxxx
> Cc: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
> ---
> arch/x86/kernel/pci-dma.c | 7 +++++--
> 1 files changed, 5 insertions(+), 2 deletions(-)

Is there any way we can abstract this out a bit more instead of crapping
on generic code?

H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at