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[PATCH 0/3] Disable vhost device IOTLB is IOMMU is not enabled
From: |
Jason Wang |
Subject: |
[PATCH 0/3] Disable vhost device IOTLB is IOMMU is not enabled |
Date: |
Wed, 4 Aug 2021 11:48:00 +0800 |
Hi:
We currently try to enable device IOTLB when iommu_platform is
set. This may lead unnecessary trasnsactions between qemu and vhost
when vIOMMU is not used (which is the typical case for the encrypted
VM).
So patch tries to use transport specific method to detect the enalbing
of vIOMMU and enable the device IOTLB only if vIOMMU is enalbed.
Please review.
Thanks
Jason Wang (3):
virtio-bus: introduce iommu_enabled()
virtio-pci: implement iommu_enabled()
vhost: correctly detect the enabling IOMMU
hw/virtio/vhost.c | 2 +-
hw/virtio/virtio-bus.c | 14 ++++++++++++++
hw/virtio/virtio-pci.c | 14 ++++++++++++++
include/hw/virtio/virtio-bus.h | 4 +++-
4 files changed, 32 insertions(+), 2 deletions(-)
--
2.25.1
- [PATCH 0/3] Disable vhost device IOTLB is IOMMU is not enabled,
Jason Wang <=
- [PATCH 1/3] virtio-bus: introduce iommu_enabled(), Jason Wang, 2021/08/03
- [PATCH 2/3] virtio-pci: implement iommu_enabled(), Jason Wang, 2021/08/03
- [PATCH 3/3] vhost: correctly detect the enabling IOMMU, Jason Wang, 2021/08/03
- Re: [PATCH 0/3] Disable vhost device IOTLB is IOMMU is not enabled, Chao Gao, 2021/08/04
- Re: [PATCH 0/3] Disable vhost device IOTLB is IOMMU is not enabled, Peter Xu, 2021/08/04