linux-kernel - [PATCH 0/2] Kernel MMU notifier for IOTLB/DEVTLB management

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Date:   Thu, 14 Dec 2017 09:02:44 +0800
From:   Lu Baolu <baolu.lu@...ux.intel.com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H . Peter Anvin" <hpa@...or.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        Joerg Roedel <joro@...tes.org>,
        David Woodhouse <dwmw2@...radead.org>
Cc:     iommu@...ts.linux-foundation.org, x86@...nel.org,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Lu Baolu <baolu.lu@...ux.intel.com>
Subject: [PATCH 0/2] Kernel MMU notifier for IOTLB/DEVTLB management

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