cloud-hypervisor/docs/amd_sev_snp.md

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# AMD SEV-SNP
### WARNING
This feature is only currently supported on MSHV.
AMD Secure Encrypted Virtualization & Secure Nested Paging (SEV-SNP) is an AMD
technology designed to add strong memory integrity protection to help prevent
malicious hypervisor-based attacks like data replay, memory-remapping and more
in order to create an isolated execution environment. Here are some useful
links:
* [SNP Homepage] (https://www.amd.com/en/processors/amd-secure-encrypted-virtualization)
more information about SEV-SNP technical aspects, design and specification.
## Cloud Hypervisor support
It is required to use a machine which has enabled support for AMD SEV-SNP in
the BIOS.
On the Cloud Hypervisor side, all you need is to build the project with the
`sev_snp` feature enabled:
```bash
cargo build --no-default-features --features "sev_snp"
```
**Note**
Please note that `sev_snp` cannot be enabled in conjunction with `tdx` feature flag.
You can run a SEV-SNP VM using the following command:
```bash
./cloud-hypervisor \
--platform sev_snp=on \
--cpus boot=1 \
--memory size=1G \
--disk path=ubuntu.img
```
For more information related to Microsoft Hypervisor please see [mshv.md](mshv.md)