diff mbox series

[v8,01/12] mm: Define pasid in mm

Message ID 20200618155125.1548969-2-jean-philippe@linaro.org (mailing list archive)
State New, archived
Headers show
Series iommu: Shared Virtual Addressing for SMMUv3 (PT sharing part) | expand

Commit Message

Jean-Philippe Brucker June 18, 2020, 3:51 p.m. UTC 
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@infradeed.org>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Reviewed-by: Tony Luck <tony.luck@intel.com>
---
https://lore.kernel.org/linux-iommu/1592418233-17762-9-git-send-email-fenghua.yu@intel.com/
---
 include/linux/mm_types.h | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 64ede5f150dc5..1ad0e54ebbbaa 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -538,6 +538,10 @@  struct mm_struct {
 		atomic_long_t hugetlb_usage;
 #endif
 		struct work_struct async_put_work;
+
+#ifdef CONFIG_IOMMU_SUPPORT
+		unsigned int pasid;
+#endif
 	} __randomize_layout;
 
 	/*