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mm: Add a pasid member to struct mm_struct

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A PASID is shared by all threads in a process. So the logical place to
keep track of it is in the mm_struct. Both ARM and x86 would use this
PASID.

 [ bp: Massage commit message. ]

Suggested-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Link: https://lkml.kernel.org/r/1600187413-163670-8-git-send-email-fenghua.yu@intel.com
This commit is contained in:
Fenghua Yu 2020-09-15 09:30:11 -07:00 • committed by Borislav Petkov
parent f0f2f9feb4
commit 52ad9bc64c
1 changed files with 4 additions and 0 deletions
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4
include/linux/mm_types.h
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@ -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;
/*