git/linux-cryptodev-2.6
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git synced 2026-04-18 03:23:53 -04:00
Code Issues Packages Projects Releases Wiki Activity

crypto: ccp - Add AMD Seamless Firmware Servicing (SFS) driver

Browse Source 
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.

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

Signed-off-by: Ashish Kalra <ashish.kalra@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Link: https://lore.kernel.org/cover.1758057691.git.ashish.kalra@amd.com
This commit is contained in:
Ashish Kalra
2025-09-16 21:29:49 +00:00
committed by Borislav Petkov (AMD)
parent e09701dcdd
commit 648dbccc03
7 changed files with 476 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
drivers/crypto/ccp/psp-dev.c
View File

@@ -17,6 +17,7 @@
#include "psp-dev.h"
#include "sev-dev.h"
#include "tee-dev.h"
#include "sfs.h"
#include "platform-access.h"
#include "dbc.h"
#include "hsti.h"
@@ -182,6 +183,17 @@ static int psp_check_tee_support(struct psp_device *psp)
return 0;
}
static int psp_check_sfs_support(struct psp_device *psp)
{
/* Check if device supports SFS feature */
if (!psp->capability.sfs) {
dev_dbg(psp->dev, "psp does not support SFS\n");
return -ENODEV;
}
return 0;
}
static int psp_init(struct psp_device *psp)
{
int ret;
@@ -198,6 +210,12 @@ static int psp_init(struct psp_device *psp)
return ret;
}
if (!psp_check_sfs_support(psp)) {
ret = sfs_dev_init(psp);
if (ret)
return ret;
}
if (psp->vdata->platform_access) {
ret = platform_access_dev_init(psp);
if (ret)
@@ -302,6 +320,8 @@ void psp_dev_destroy(struct sp_device *sp)
tee_dev_destroy(psp);
sfs_dev_destroy(psp);
dbc_dev_destroy(psp);
platform_access_dev_destroy(psp);