[tip: x86/pasid] mm: Change CONFIG option for mm->pasid field

tip-bot2 for Fenghua Yu
2022-02-15T10:55:02Z

The following commit has been merged into the x86/pasid branch of tip:

Commit-ID: 7a853c2d5951419fdf3c1c9d2b6f5a38f6a6857d
Gitweb: https://git.kernel.org/tip/7a853c2d5951419fdf3c1c9d2b6f5a38f6a6857d
Author: Fenghua Yu <fenghua.yu@intel.com>
AuthorDate: Mon, 07 Feb 2022 15:02:45 -08:00
Committer: Borislav Petkov <bp@suse.de>
CommitterDate: Mon, 14 Feb 2022 19:23:50 +01:00

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
---
include/linux/mm_types.h | 2 +-
kernel/fork.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 5140e5f..c5cbfd7 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -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;
diff --git a/kernel/fork.c b/kernel/fork.c
index d75a528..6ee7551 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -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
}