The patch titled
Subject: iommu/amd: use new invalidate_range mmu-notifier
has been removed from the -mm tree. Its filename was
iommu-amd-use-new-invalidate_range-mmu-notifier.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Joerg Roedel <jroedel@xxxxxxx>
Subject: iommu/amd: use new invalidate_range mmu-notifier
Make use of the new invalidate_range mmu_notifier call-back and remove the
old logic of assigning an empty page-table between invalidate_range_start
and invalidate_range_end.
Signed-off-by: Joerg Roedel <jroedel@xxxxxxx>
Tested-by: Oded Gabbay <oded.gabbay@xxxxxxx>
Reviewed-by: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Reviewed-by: Jérôme Glisse <jglisse@xxxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Cc: Johannes Weiner <jweiner@xxxxxxxxxx>
Cc: Jay Cornwall <Jay.Cornwall@xxxxxxx>
Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@xxxxxxx>
Cc: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
Cc: David Woodhouse <dwmw2@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/iommu/amd_iommu_v2.c | 61 ++++-----------------------------
1 file changed, 9 insertions(+), 52 deletions(-)
diff -puN drivers/iommu/amd_iommu_v2.c~iommu-amd-use-new-invalidate_range-mmu-notifier drivers/iommu/amd_iommu_v2.c
--- a/drivers/iommu/amd_iommu_v2.c~iommu-amd-use-new-invalidate_range-mmu-notifier
+++ a/drivers/iommu/amd_iommu_v2.c
@@ -92,13 +92,6 @@ static spinlock_t state_lock;
static struct workqueue_struct *iommu_wq;
-/*
- * Empty page table - Used between
- * mmu_notifier_invalidate_range_start and
- * mmu_notifier_invalidate_range_end
- */
-static u64 *empty_page_table;
-
static void free_pasid_states(struct device_state *dev_state);
static u16 device_id(struct pci_dev *pdev)
@@ -418,46 +411,21 @@ static void mn_invalidate_page(struct mm
__mn_flush_page(mn, address);
}
-static void mn_invalidate_range_start(struct mmu_notifier *mn,
- struct mm_struct *mm,
- unsigned long start, unsigned long end)
-{
- struct pasid_state *pasid_state;
- struct device_state *dev_state;
- unsigned long flags;
-
- pasid_state = mn_to_state(mn);
- dev_state = pasid_state->device_state;
-
- spin_lock_irqsave(&pasid_state->lock, flags);
- if (pasid_state->mmu_notifier_count == 0) {
- amd_iommu_domain_set_gcr3(dev_state->domain,
- pasid_state->pasid,
- __pa(empty_page_table));
- }
- pasid_state->mmu_notifier_count += 1;
- spin_unlock_irqrestore(&pasid_state->lock, flags);
-}
-
-static void mn_invalidate_range_end(struct mmu_notifier *mn,
- struct mm_struct *mm,
- unsigned long start, unsigned long end)
+static void mn_invalidate_range(struct mmu_notifier *mn,
+ struct mm_struct *mm,
+ unsigned long start, unsigned long end)
{
struct pasid_state *pasid_state;
struct device_state *dev_state;
- unsigned long flags;
pasid_state = mn_to_state(mn);
dev_state = pasid_state->device_state;
- spin_lock_irqsave(&pasid_state->lock, flags);
- pasid_state->mmu_notifier_count -= 1;
- if (pasid_state->mmu_notifier_count == 0) {
- amd_iommu_domain_set_gcr3(dev_state->domain,
- pasid_state->pasid,
- __pa(pasid_state->mm->pgd));
- }
- spin_unlock_irqrestore(&pasid_state->lock, flags);
+ if ((start ^ (end - 1)) < PAGE_SIZE)
+ amd_iommu_flush_page(dev_state->domain, pasid_state->pasid,
+ start);
+ else
+ amd_iommu_flush_tlb(dev_state->domain, pasid_state->pasid);
}
static void mn_release(struct mmu_notifier *mn, struct mm_struct *mm)
@@ -482,8 +450,7 @@ static struct mmu_notifier_ops iommu_mn
.release = mn_release,
.clear_flush_young = mn_clear_flush_young,
.invalidate_page = mn_invalidate_page,
- .invalidate_range_start = mn_invalidate_range_start,
- .invalidate_range_end = mn_invalidate_range_end,
+ .invalidate_range = mn_invalidate_range,
};
static void set_pri_tag_status(struct pasid_state *pasid_state,
@@ -954,18 +921,10 @@ static int __init amd_iommu_v2_init(void
if (iommu_wq == NULL)
goto out;
- ret = -ENOMEM;
- empty_page_table = (u64 *)get_zeroed_page(GFP_KERNEL);
- if (empty_page_table == NULL)
- goto out_destroy_wq;
-
amd_iommu_register_ppr_notifier(&ppr_nb);
return 0;
-out_destroy_wq:
- destroy_workqueue(iommu_wq);
-
out:
return ret;
}
@@ -999,8 +958,6 @@ static void __exit amd_iommu_v2_exit(voi
}
destroy_workqueue(iommu_wq);
-
- free_page((unsigned long)empty_page_table);
}
module_init(amd_iommu_v2_init);
_
Patches currently in -mm which might be from jroedel@xxxxxxx are
mm-export-find_extend_vma-and-handle_mm_fault-for-driver-use.patch
iommu-amd-use-handle_mm_fault-directly-v2.patch
linux-next.patch
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