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iommu/amd: Remove clear_flush_young notifier 

AMD IOMMU driver is using the clear_flush_young() to do cache flushing
but that's actually already covered by invalidate_range().  Remove the
extra notifier and the chunks.

Signed-off-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Peter Xu 2019-01-30 13:57:58 +08:00 committed by Joerg Roedel
parent 2e6c6a8657
commit 5a63f0adeb
1 changed files with 0 additions and 24 deletions
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24
drivers/iommu/amd_iommu_v2.c
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@ -370,29 +370,6 @@ static struct pasid_state *mn_to_state(struct mmu_notifier *mn)
return container_of(mn, struct pasid_state, mn);
}
static void __mn_flush_page(struct mmu_notifier *mn,
unsigned long address)
{
struct pasid_state *pasid_state;
struct device_state *dev_state;
pasid_state = mn_to_state(mn);
dev_state = pasid_state->device_state;
amd_iommu_flush_page(dev_state->domain, pasid_state->pasid, address);
}
static int mn_clear_flush_young(struct mmu_notifier *mn,
struct mm_struct *mm,
unsigned long start,
unsigned long end)
{
for (; start < end; start += PAGE_SIZE)
__mn_flush_page(mn, start);
return 0;
}
static void mn_invalidate_range(struct mmu_notifier *mn,
struct mm_struct *mm,
unsigned long start, unsigned long end)
@ -430,7 +407,6 @@ static void mn_release(struct mmu_notifier *mn, struct mm_struct *mm)
static const struct mmu_notifier_ops iommu_mn = {
.release = mn_release,
.clear_flush_young = mn_clear_flush_young,
.invalidate_range = mn_invalidate_range,
};