2019-07-30 05:58:10

by Christoph Hellwig

Subject: [PATCH 13/13] mm: allow HMM_MIRROR on all architectures with MMU

There isn't really any architecture specific code in this page table
walk implementation, so drop the dependencies.

Signed-off-by: Christoph Hellwig <[email protected]>
---
mm/Kconfig | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/mm/Kconfig b/mm/Kconfig
index 56cec636a1fc..b18782be969c 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -677,8 +677,7 @@ config DEV_PAGEMAP_OPS

config HMM_MIRROR
bool "HMM mirror CPU page table into a device page table"
- depends on (X86_64 || PPC64)
- depends on MMU && 64BIT
+ depends on MMU
select MMU_NOTIFIER
help
Select HMM_MIRROR if you want to mirror range of the CPU page table of a
--
2.20.1

2019-07-30 18:18:53

by Jason Gunthorpe

Subject: Re: [PATCH 13/13] mm: allow HMM_MIRROR on all architectures with MMU

On Tue, Jul 30, 2019 at 03:03:46PM -0300, Jason Gunthorpe wrote:
> On Tue, Jul 30, 2019 at 08:52:03AM +0300, Christoph Hellwig wrote:
> > There isn't really any architecture specific code in this page table
> > walk implementation, so drop the dependencies.
> >
> > Signed-off-by: Christoph Hellwig <[email protected]>
> > mm/Kconfig | 3 +--
> > 1 file changed, 1 insertion(+), 2 deletions(-)
>
> Happy to see it, lets try to get this patch + the required parts of
> this series into linux-next to be really sure
>
> Reviewed-by: Jason Gunthorpe <[email protected]>

Oh, can we make this into a non-user selectable option now?

ie have the drivers that use the API select it?

Thanks,
Jason

2019-07-30 20:02:35

by Jason Gunthorpe

Subject: Re: [PATCH 13/13] mm: allow HMM_MIRROR on all architectures with MMU

On Tue, Jul 30, 2019 at 08:52:03AM +0300, Christoph Hellwig wrote:
> There isn't really any architecture specific code in this page table
> walk implementation, so drop the dependencies.
>
> Signed-off-by: Christoph Hellwig <[email protected]>
> mm/Kconfig | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)

Happy to see it, lets try to get this patch + the required parts of
this series into linux-next to be really sure

Reviewed-by: Jason Gunthorpe <[email protected]>

Thanks,
Jason

2019-08-01 07:37:04

by Christoph Hellwig

Subject: Re: [PATCH 13/13] mm: allow HMM_MIRROR on all architectures with MMU

On Tue, Jul 30, 2019 at 06:04:56PM +0000, Jason Gunthorpe wrote:
> Oh, can we make this into a non-user selectable option now?
>
> ie have the drivers that use the API select it?

Sure, I'll throw in another patch for that.