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Re: [PATCH v2] virtio-iommu: Use qemu_real_host_page_mask as default pag
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From: |
Eric Auger |
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Subject: |
Re: [PATCH v2] virtio-iommu: Use qemu_real_host_page_mask as default page_size_mask |
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Date: |
Tue, 13 Feb 2024 12:24:22 +0100 |
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User-agent: |
Mozilla Thunderbird |
Hi Michael,
On 2/13/24 12:09, Michael S. Tsirkin wrote:
> On Tue, Feb 13, 2024 at 11:32:13AM +0100, Eric Auger wrote:
>> Do you have an other concern?
> I also worry a bit about migrating between hosts with different
> page sizes. Not with kvm I am guessing but with tcg it does work I think?
I have never tried but is it a valid use case? Adding Peter in CC.
> Is this just for vfio and vdpa? Can we limit this to these setups
> maybe?
I am afraid we know the actual use case too later. If the VFIO device is
hotplugged we have started working with 4kB granule.
The other way is to introduce a min_granule option as done for aw-bits.
But it is heavier.
Thanks
Eric
>