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Add the instruction to include the tdx_guest on Ubuntu images. #426

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Add the instruction to include the tdx_guest on Ubuntu images. #426

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17 changes: 17 additions & 0 deletions README.md
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Expand Up @@ -119,6 +119,23 @@ before committing your changes.

Unlike [Go-TPM](https://github.com/google/go-tpm) (which supports TPM 1.2 and TPM 2.0), this module explicitly only supports TPM 2.0. Users should avoid use of TPM 1.2 due to the inherent reliance on SHA1 (which is [quite broken](https://sha-mbles.github.io/)).

## Confidential VMs with Intel TDX
For Ubuntu image, the `tdx_guest` module was moved to linux-modules-extra
package in the 1016 and newer kernels. You should be able to install the module,
and either manually load the module or reboot.

To install the linux-modules-extra package, run:

```console
sudo apt-get install linux-modules-extra-gcp
```

To manually load the module, run:

```console
sudo modprobe tdx_guest
```

## Legal

Copyright 2018 Google Inc. under the
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