Re: [PATCH 0/3] Fix UNMAP notifier for intel-iommu

[Michael S. Tsirkin]

On Tue, Nov 29, 2022 at 04:10:34PM +0800, Jason Wang wrote:
> Hi All:
> 
> According to ATS, device should work if ATS is disabled. This is not
> correctly implemented in the current intel-iommu since it doesn't
> handle the UNMAP notifier correctly. This breaks the vhost-net +
> vIOMMU without dt.
> 
> The root casue is that the when there's a device IOTLB miss (note that
> it's not specific to PCI so it can work without ATS), Qemu doesn't
> build the IOVA tree, so when guest start an IOTLB invalidation, Qemu
> won't trigger the UNMAP notifier.
> 
> Fixing by build IOVA tree during IOMMU translsation.
> 
> Thanks

Any changes of Fixes tags? this is 8.0 yes?

> Jason Wang (3):
>   intel-iommu: fail MAP notifier without caching mode
>   intel-iommu: fail DEVIOTLB_UNMAP without dt mode
>   intel-iommu: build iova tree during IOMMU translation
> 
>  hw/i386/intel_iommu.c | 58 ++++++++++++++++++++++++-------------------
>  1 file changed, 33 insertions(+), 25 deletions(-)
> 
> -- 
> 2.25.1