Messages in this thread | ![/](/images/icornerl.gif) | | Date | Wed, 14 Jun 2023 08:52:49 -0300 | From | Jason Gunthorpe <> | Subject | Re: [PATCH v3 00/10] Add Intel VT-d nested translation |
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On Wed, Jun 14, 2023 at 08:07:30AM +0000, Tian, Kevin wrote:
> think of a scenario where the vbios memory is shared by multiple qemu > instances then RW allows a malicious VM to modify the shared content > then potentially attacking other VMs.
qemu would have to map the vbios as MAP_PRIVATE WRITE before the iommu side could map it writable, so this is not a real worry.
Jason
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