Thread (10 messages) 10 messages, 5 authors, 2026-08-25

Re: [PATCH] fuse: mark DAX VMA page protections as decrypted

From: Gupta, Pankaj <hidden>
Date: 2026-08-20 08:21:58
Also in: linux-fsdevel, lkml

quoted
I started testing this on my AMD system with QEMU and am still working
through the configuration details.

Did you happen to test this with QEMU under SEV or SEV-SNP as well? If so,
would you mind sharing your setup steps or

the QEMU/virtio-fs configuration you used?


The error I am facing is: device 'vhost-user-fs-pci' does not support
ACCESS_PLATFORM when it is enabled.

But under SEV-SNP ACCESS_PLATFORM(iommu_platform) is globally enabled and
when I manually disable it, guest says:

[    8.788217] virtiofs virtio0: device must provide
VIRTIO_F_ACCESS_PLATFORM
I'm not sure what the real solution should be for this, but does this
hack for QEMU avoid the error?

   https://github.com/AMDESE/qemu/commit/63f103e35f5f3735d10f7618584bd8bb208e2c28
Mike,

Yes, this hack avoids the error, and I was able to get virtio-fs working 
with it.

Thanks for sharing the patch!

Best regards,

Pankaj
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