Commit 52ad9bc6 authored Sep 15, 2020 by Fenghua Yu Committed by Borislav Petkov Sep 17, 2020

mm: Add a pasid member to struct mm_struct



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

parent f0f2f9fe

include/linux/mm_types.h

+4 −0

Original line number	Diff line number	Diff line
		@@ -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;

		/*

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