# Re: \[PATCH\] crypto: ccp: shutdown SEV firmware on kexec

- From: Lucas Nussbaum \<hidden\>
- Date: 2021-08-23 07:33:27 
- List: linux-crypto
- Page: https://ratatoskr.run/linux-crypto/2021/08/1485428
- Thread: https://ratatoskr.run/linux-crypto/2021/07/1461009/t.md

```text
On 06/08/21 at 20:14 +0800, Herbert Xu wrote:
> On Wed, Jul 28, 2021 at 10:15:21AM -0500, Brijesh Singh wrote:
> > The commit 97f9ac3db6612 ("crypto: ccp - Add support for SEV-ES to the
> > PSP driver") added support to allocate Trusted Memory Region (TMR)
> > used during the SEV-ES firmware initialization. The TMR gets locked
> > during the firmware initialization and unlocked during the shutdown.
> > While the TMR is locked, access to it is disallowed.
> > 
> > Currently, the CCP driver does not shutdown the firmware during the
> > kexec reboot, leaving the TMR memory locked.
> > 
> > Register a callback to shutdown the SEV firmware on the kexec boot.
> > 
> > Fixes: 97f9ac3db6612 ("crypto: ccp - Add support for SEV-ES to the PSP driver")
> > Reported-by: Lucas Nussbaum <redacted>
> > Tested-by: Lucas Nussbaum <redacted>
> > Cc: <stable@kernel.org>
> > Cc: Tom Lendacky <thomas.lendacky@amd.com>
> > Cc: Joerg Roedel <redacted>
> > Cc: Herbert Xu <herbert@gondor.apana.org.au>
> > Cc: David Rientjes <rientjes@google.com>
> > Signed-off-by: Brijesh Singh <redacted>
> > ---
> >  drivers/crypto/ccp/sev-dev.c | 49 +++++++++++++++++-------------------
> >  drivers/crypto/ccp/sp-pci.c  | 12 +++++++++
> >  2 files changed, 35 insertions(+), 26 deletions(-)
> 
> Patch applied.  Thanks.

Could this be backported to 5.10 as well?

Thanks
-- 
Lucas Nussbaum   [ref]   +33 3 54 95 86 19
Responsable du programme plateformes d'expérimentation
DDO-SDT - Direction Générale Déléguée à l'Innovation - Inria
```