From: Arnd Bergmann
The arm version of the arch_sync_dma_for_cpu() function annotates pages as
PG_dcache_clean after a DMA, but no other architecture does this here. On
ia64, the same thing is done in arch_sync_dma_for_cpu(), so it makes sense
to use the same hook in order to have identical arch_
On 2023-03-27 13:13, Arnd Bergmann wrote:
From: Arnd Bergmann
The arm version of the arch_sync_dma_for_cpu() function annotates pages as
PG_dcache_clean after a DMA, but no other architecture does this here. On
ia64, the same thing is done in arch_sync_dma_for_cpu(), so it makes sense
to use th
On Mon, Mar 27, 2023 at 02:13:16PM +0200, Arnd Bergmann wrote:
> From: Arnd Bergmann
>
> The arm version of the arch_sync_dma_for_cpu() function annotates pages as
> PG_dcache_clean after a DMA, but no other architecture does this here.
... because this is an arm32 specific feature. Generically,
On Mon, Mar 27, 2023, at 14:48, Robin Murphy wrote:
> On 2023-03-27 13:13, Arnd Bergmann wrote:
>>
>> [ HELP NEEDED: can anyone confirm that it is a correct assumption
>>on arm that a cache-coherent device writing to a page always results
>>in it being in a PG_dcache_clean state like on ia
On Mon, Mar 27, 2023, at 17:01, Russell King (Oracle) wrote:
> On Mon, Mar 27, 2023 at 02:13:16PM +0200, Arnd Bergmann wrote:
>> From: Arnd Bergmann
>>
>> The arm version of the arch_sync_dma_for_cpu() function annotates pages as
>> PG_dcache_clean after a DMA, but no other architecture does this
On 31/03/2023 3:00 pm, Arnd Bergmann wrote:
On Mon, Mar 27, 2023, at 14:48, Robin Murphy wrote:
On 2023-03-27 13:13, Arnd Bergmann wrote:
[ HELP NEEDED: can anyone confirm that it is a correct assumption
on arm that a cache-coherent device writing to a page always results
in it being i
On Fri, Mar 31, 2023 at 04:06:37PM +0200, Arnd Bergmann wrote:
> On Mon, Mar 27, 2023, at 17:01, Russell King (Oracle) wrote:
> > On Mon, Mar 27, 2023 at 02:13:16PM +0200, Arnd Bergmann wrote:
> >> From: Arnd Bergmann
> >>
> >> The arm version of the arch_sync_dma_for_cpu() function annotates pag
On Fri, Mar 31, 2023, at 17:12, Robin Murphy wrote:
> On 31/03/2023 3:00 pm, Arnd Bergmann wrote:
>> On Mon, Mar 27, 2023, at 14:48, Robin Murphy wrote:
>>
>> To be on the safe side, I'd have to pass a flag into
>> arch_dma_mark_clean() about coherency, to let the arm
>> implementation still requi
Hi Arnd,
On Mon, Mar 27, 2023 at 2:16 PM Arnd Bergmann wrote:
> From: Arnd Bergmann
>
> The arm version of the arch_sync_dma_for_cpu() function annotates pages as
> PG_dcache_clean after a DMA, but no other architecture does this here. On
> ia64, the same thing is done in arch_sync_dma_for_cpu()
> Thanks for your patch, which is now commit 322dbe898f82fd8a
> ("ARM: dma-mapping: split out arch_dma_mark_clean() helper") in
> esmil/jh7100-dmapool.
Well, something is wrong with that branch then, and this series still
needs more work, and should eventually be merged through the dma-mapping
tre
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