RE: [PATCH v3] x86/pci-dma: add a SWIOTLB_ANY flag to lift the low mem limitation

From: Miao, Jun

Date: Wed Jun 24 2026 - 04:13:02 EST


>Sounds better, yes.
>
>Except that we still need to test it on SNP.
>
>Adding some folks on Cc who can do that and take a look at your patch and vet it
>for SNP - my guest is still broken. :-\

Hi Boris,
Thanks for getting involved and showing your support, I look forward to further updates from CC folks :-)

I would also like to further thank Aakarsh for the detailed dmesg information about SEV-SNP:
>From kernel dmesg logs:
root@ubuntu:/home/ubuntu# dmesg | grep -i sev
[ 21.191917] Memory Encryption Features active: AMD SEV SEV-ES SEV-SNP
[ 21.192883] SEV: Status: SEV SEV-ES SEV-SNP
... ...
root@ubuntu:/home/ubuntu# dmesg | grep -i "IO TLB"
[ 6.743607] software IO TLB: area num 4.
[ 24.164169] software IO TLB: mapped [mem
0x0000001df9c00000-0x0000001ff9c00000] (8192MB)

Warm regards
Jun Miao