linux-kernel - [PATCH 0/2] crypto: ccp - Add AMD Seamless Firmware Servicing (SFS) driver

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Message-ID: <cover.1753389962.git.ashish.kalra@amd.com>
Date: Thu, 24 Jul 2025 21:13:48 +0000
From: Ashish Kalra <Ashish.Kalra@....com>
To: <thomas.lendacky@....com>, <john.allen@....com>,
	<herbert@...dor.apana.org.au>, <davem@...emloft.net>
CC: <seanjc@...gle.com>, <pbonzini@...hat.com>, <michael.roth@....com>,
	<linux-crypto@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH 0/2] crypto: ccp - Add AMD Seamless Firmware Servicing (SFS) driver

From: Ashish Kalra <ashish.kalra@....com>

AMD Seamless Firmware Servicing (SFS) is a secure method to allow
non-persistent updates to running firmware and settings without
requiring BIOS reflash and/or system reset.

SFS does not address anything that runs on the x86 processors and
it can be used to update ASP firmware, modules, register settings
and update firmware for other microprocessors like TMPM, etc.

SFS driver support adds ioctl support to communicate the SFS
commands to the ASP/PSP by using the TEE mailbox interface.

The Seamless Firmware Servicing (SFS) driver is added as a
PSP sub-device.

Includes a pre-patch for the SEV driver to add new API interface
to extend the hypervisor fixed pages list passed to SNP_INIT_EX
to allow other PSP sub-devices such as the SFS driver to add 
their HV_Fixed pages to this list.

For detailed information, please look at the SFS specifications:
https://www.amd.com/content/dam/amd/en/documents/epyc-technical-docs/specifications/58604.pdf

Ashish Kalra (2):
  crypto: ccp - Add new API for extending HV_Fixed Pages
  crypto: ccp - Add AMD Seamless Firmware Servicing (SFS) driver

 drivers/crypto/ccp/Makefile         |   3 +-
 drivers/crypto/ccp/psp-dev.c        |  20 ++
 drivers/crypto/ccp/psp-dev.h        |   8 +-
 drivers/crypto/ccp/sev-dev.c        |  88 ++++++++
 drivers/crypto/ccp/sev-dev.h        |   3 +
 drivers/crypto/ccp/sfs.c            | 316 ++++++++++++++++++++++++++++
 drivers/crypto/ccp/sfs.h            |  53 +++++
 include/linux/psp-platform-access.h |   2 +
 include/uapi/linux/psp-sfs.h        |  87 ++++++++
 9 files changed, 578 insertions(+), 2 deletions(-)
 create mode 100644 drivers/crypto/ccp/sfs.c
 create mode 100644 drivers/crypto/ccp/sfs.h
 create mode 100644 include/uapi/linux/psp-sfs.h

-- 
2.34.1