On Wed, 11 Sep 2019, Peng Fan wrote:
> > Subject: Re: [PATCH V2] arm: xen: mm: use __GPF_DMA32 for arm64
> >
> > + Juergen, Boris
> >
> > On Fri, 30 Aug 2019, Christoph Hellwig wrote:
> > > Can we take a step back and figure out what we want to do here?
> > >
> > > AFAICS this function allocates
> Subject: Re: [PATCH V2] arm: xen: mm: use __GPF_DMA32 for arm64
>
> + Juergen, Boris
>
> On Fri, 30 Aug 2019, Christoph Hellwig wrote:
> > Can we take a step back and figure out what we want to do here?
> >
> > AFAICS this function allocates memory for the swiotlb-xen buffer, and
> > that
On 02.09.19 17:57, Christoph Hellwig wrote:
On Fri, Aug 30, 2019 at 07:40:42PM -0700, Stefano Stabellini wrote:
+ Juergen, Boris
On Fri, 30 Aug 2019, Christoph Hellwig wrote:
Can we take a step back and figure out what we want to do here?
AFAICS this function allocates memory for the
On Fri, Aug 30, 2019 at 07:40:42PM -0700, Stefano Stabellini wrote:
> + Juergen, Boris
>
> On Fri, 30 Aug 2019, Christoph Hellwig wrote:
> > Can we take a step back and figure out what we want to do here?
> >
> > AFAICS this function allocates memory for the swiotlb-xen buffer,
> > and that
+ Juergen, Boris
On Fri, 30 Aug 2019, Christoph Hellwig wrote:
> Can we take a step back and figure out what we want to do here?
>
> AFAICS this function allocates memory for the swiotlb-xen buffer,
> and that means it must be <= 32-bit addressable to satisfy the DMA API
> guarantees. That
Can we take a step back and figure out what we want to do here?
AFAICS this function allocates memory for the swiotlb-xen buffer,
and that means it must be <= 32-bit addressable to satisfy the DMA API
guarantees. That means we generally want to use GFP_DMA32 everywhere
that exists, but on
Hi Peng,
On 30/08/2019 04:28, Peng Fan wrote:
> From: Peng Fan
>
> arm64 shares some code under arch/arm/xen, including mm.c.
> However ZONE_DMA is removed by commit
> ad67f5a6545("arm64: replace ZONE_DMA with ZONE_DMA32").
> So introduce xen_set_gfp_dma for arm32/arm64 and using __GFP_DMA
>
From: Peng Fan
arm64 shares some code under arch/arm/xen, including mm.c.
However ZONE_DMA is removed by commit
ad67f5a6545("arm64: replace ZONE_DMA with ZONE_DMA32").
So introduce xen_set_gfp_dma for arm32/arm64 and using __GFP_DMA
for the former and __GFP_DMA32 for the latter.
Signed-off-by:
