| Message ID | 20200918101852.582559-2-jean-philippe@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | iommu: Shared Virtual Addressing for SMMUv3 (PT sharing part) | expand |
On Fri, Sep 18, 2020 at 12:18:41PM +0200, Jean-Philippe Brucker wrote: > From: Fenghua Yu <fenghua.yu@intel.com> > > 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 <hch@infradead.org> > Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> > Reviewed-by: Tony Luck <tony.luck@intel.com> > --- > https://lore.kernel.org/linux-iommu/1600187413-163670-8-git-send-email-fenghua.yu@intel.com/ > --- > include/linux/mm_types.h | 4 ++++ > 1 file changed, 4 insertions(+) Acked-by: Will Deacon <will@kernel.org> Will
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 <fenghua.yu@intel.com> > > > > 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 <hch@infradead.org> > > Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> > > Reviewed-by: Tony Luck <tony.luck@intel.com> > > --- > > https://lore.kernel.org/linux-iommu/1600187413-163670-8-git-send-email-fenghua.yu@intel.com/ > > --- > > include/linux/mm_types.h | 4 ++++ > > 1 file changed, 4 insertions(+) > > Acked-by: Will Deacon <will@kernel.org> FYI. This patch is in x86 maintainers tree tip:x86/pasid now as part of the x86 PASID MSR series. Thanks. -Fenghua
On Mon, Sep 28, 2020 at 10:43:26PM +0000, 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 <fenghua.yu@intel.com> > > > > > > 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 <hch@infradead.org> > > > Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> > > > Reviewed-by: Tony Luck <tony.luck@intel.com> > > > --- > > > https://lore.kernel.org/linux-iommu/1600187413-163670-8-git-send-email-fenghua.yu@intel.com/ > > > --- > > > include/linux/mm_types.h | 4 ++++ > > > 1 file changed, 4 insertions(+) > > > > Acked-by: Will Deacon <will@kernel.org> > > 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
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; /*