The following commit has been merged into the x86/pasid branch of tip:
Commit-ID: 52ad9bc64c74167466e70e0df4b99ee5ccef0078
Gitweb: https://git.kernel.org/tip/52ad9bc64c74167466e70e0df4b99ee5ccef0078
Author: Fenghua Yu <fenghua.yu@xxxxxxxxx>
AuthorDate: Tue, 15 Sep 2020 09:30:11 -07:00
Committer: Borislav Petkov <bp@xxxxxxx>
CommitterDate: Thu, 17 Sep 2020 20:22:15 +02:00
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@xxxxxxxxxxxxx>
Signed-off-by: Fenghua Yu <fenghua.yu@xxxxxxxxx>
Signed-off-by: Borislav Petkov <bp@xxxxxxx>
Reviewed-by: Tony Luck <tony.luck@xxxxxxxxx>
Link: https://lkml.kernel.org/r/1600187413-163670-8-git-send-email-fenghua.yu@xxxxxxxxx
---
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 496c3ff..1ff0615 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;
/*
|