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mm: Change CONFIG option for mm->pasid field

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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
This commit is contained in:
Fenghua Yu 2022-02-07 15:02:45 -08:00 committed by Borislav Petkov
parent 7ba564722d
commit 7a853c2d59
2 changed files with 2 additions and 2 deletions
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2
include/linux/mm_types.h
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@ -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;

2
kernel/fork.c
View File

@ -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
}