Messages in this thread | | | From | Lu Baolu <> | Subject | [PATCH 0/2] Kernel MMU notifier for IOTLB/DEVTLB management | Date | Thu, 14 Dec 2017 09:02:44 +0800 |
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Shared Virtual Memory (SVM) allows a kernel memory mapping to be shared between CPU and and a device which requested a supervisor PASID. Both devices and IOMMU units have TLBs that cache entries from CPU's page tables. We need to get a chance to flush them at the same time when we flush the CPU TLBs.
These patches handle this by adding a kernel MMU notifier chain. The callbacks on this chain will be called whenever the CPU TLB is flushed for the kernel address space.
Ashok Raj (1): iommu/vt-d: Register kernel MMU notifier to manage IOTLB/DEVTLB
Huang Ying (1): mm: Add kernel MMU notifier to manage IOTLB/DEVTLB
arch/x86/mm/tlb.c | 2 ++ drivers/iommu/intel-svm.c | 27 +++++++++++++++++++++++++-- include/linux/intel-iommu.h | 5 ++++- include/linux/mmu_notifier.h | 33 +++++++++++++++++++++++++++++++++ mm/mmu_notifier.c | 27 +++++++++++++++++++++++++++ 5 files changed, 91 insertions(+), 3 deletions(-)
-- 2.7.4
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