Re: [PATCH v10 01/13] mm: Define pasid in mm

2020-09-30 Thread Jean-Philippe Brucker 
On Mon, Sep 28, 2020 at 10:43:26PM +, Fenghua Yu wrote:
> Hi, Will and Jean,
> 
> On Mon, Sep 28, 2020 at 11:22:51PM +0100, Will Deacon wrote:
> > On Fri, Sep 18, 2020 at 12:18:41PM +0200, Jean-Philippe Brucker wrote:
> > > From: Fenghua Yu 
> > > 
> > > PASID is shared by all threads in a process. So the logical place to keep
> > > track of it is in the "mm". Both ARM and X86 need to use the PASID in the
> > > "mm".
> > > 
> > > Suggested-by: Christoph Hellwig 
> > > Signed-off-by: Fenghua Yu 
> > > Reviewed-by: Tony Luck 
> > > ---
> > > https://lore.kernel.org/linux-iommu/1600187413-163670-8-git-send-email-fenghua...@intel.com/
> > > ---
> > >  include/linux/mm_types.h | 4 
> > >  1 file changed, 4 insertions(+)
> > 
> > Acked-by: Will Deacon 
> 
> FYI. This patch is in x86 maintainers tree tip:x86/pasid now as part of
> the x86 PASID MSR series.

Ah I missed that, glad to see it in v5.10

Thanks,
Jean
___
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu

Re: [PATCH v10 01/13] mm: Define pasid in mm

2020-09-28 Thread Fenghua Yu 
Hi, Will and Jean,

On Mon, Sep 28, 2020 at 11:22:51PM +0100, Will Deacon wrote:
> On Fri, Sep 18, 2020 at 12:18:41PM +0200, Jean-Philippe Brucker wrote:
> > From: Fenghua Yu 
> > 
> > PASID is shared by all threads in a process. So the logical place to keep
> > track of it is in the "mm". Both ARM and X86 need to use the PASID in the
> > "mm".
> > 
> > Suggested-by: Christoph Hellwig 
> > Signed-off-by: Fenghua Yu 
> > Reviewed-by: Tony Luck 
> > ---
> > https://lore.kernel.org/linux-iommu/1600187413-163670-8-git-send-email-fenghua...@intel.com/
> > ---
> >  include/linux/mm_types.h | 4 
> >  1 file changed, 4 insertions(+)
> 
> Acked-by: Will Deacon 

FYI. This patch is in x86 maintainers tree tip:x86/pasid now as part of
the x86 PASID MSR series.

Thanks.

-Fenghua
___
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu

Re: [PATCH v10 01/13] mm: Define pasid in mm

2020-09-28 Thread Will Deacon 
On Fri, Sep 18, 2020 at 12:18:41PM +0200, Jean-Philippe Brucker wrote:
> From: Fenghua Yu 
> 
> PASID is shared by all threads in a process. So the logical place to keep
> track of it is in the "mm". Both ARM and X86 need to use the PASID in the
> "mm".
> 
> Suggested-by: Christoph Hellwig 
> Signed-off-by: Fenghua Yu 
> Reviewed-by: Tony Luck 
> ---
> https://lore.kernel.org/linux-iommu/1600187413-163670-8-git-send-email-fenghua...@intel.com/
> ---
>  include/linux/mm_types.h | 4 
>  1 file changed, 4 insertions(+)

Acked-by: Will Deacon 

Will
___
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu

[PATCH v10 01/13] mm: Define pasid in mm

2020-09-18 Thread Jean-Philippe Brucker 
From: Fenghua Yu 

PASID is shared by all threads in a process. So the logical place to keep
track of it is in the "mm". Both ARM and X86 need to use the PASID in the
"mm".

Suggested-by: Christoph Hellwig 
Signed-off-by: Fenghua Yu 
Reviewed-by: Tony Luck 
---
https://lore.kernel.org/linux-iommu/1600187413-163670-8-git-send-email-fenghua...@intel.com/
---
 include/linux/mm_types.h | 4 
 1 file changed, 4 insertions(+)

diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 496c3ff97cce..1ff0615ef19f 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -542,6 +542,10 @@ struct mm_struct {
atomic_long_t hugetlb_usage;
 #endif
struct work_struct async_put_work;
+
+#ifdef CONFIG_IOMMU_SUPPORT
+   u32 pasid;
+#endif
} __randomize_layout;
 
/*
-- 
2.28.0

___
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu