Commit 7a853c2d authored Feb 07, 2022 by Fenghua Yu Committed by Borislav Petkov Feb 14, 2022

mm: Change CONFIG option for mm->pasid field



This currently depends on CONFIG_IOMMU_SUPPORT. But it is only
needed when CONFIG_IOMMU_SVA option is enabled.

Change the CONFIG guards around definition and initialization
of mm->pasid field.

Suggested-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
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>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20220207230254.3342514-3-fenghua.yu@intel.com

parent 7ba56472

include/linux/mm_types.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -631,7 +631,7 @@ struct mm_struct {
		#endif
		struct work_struct async_put_work;

		#ifdef CONFIG_IOMMU_SUPPORT
		#ifdef CONFIG_IOMMU_SVA
		u32 pasid;
		#endif
		} __randomize_layout;

kernel/fork.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1021,7 +1021,7 @@ static void mm_init_owner(struct mm_struct mm, struct task_struct p)

		static void mm_init_pasid(struct mm_struct *mm)
		{
		#ifdef CONFIG_IOMMU_SUPPORT
		#ifdef CONFIG_IOMMU_SVA
		mm->pasid = INIT_PASID;
		#endif
		}