kernel/linux.git/drivers/crypto/ccp/sp-dev.h, branch v6.6.133

crypto: ccp - Move direct access to some PSP registers out of TEE

2026-03-04T12:20:00+00:00

[ Upstream commit 949a0c8dd3c257730ef7205be759e4bc6cf49cea ] With the PSP mailbox registers supporting more than just TEE, access to them must be maintained and serialized by the PSP device support. Remove TEE support direct access and create an interface in the PSP support where the register access can be controlled/serialized. Signed-off-by: Tom Lendacky Signed-off-by: Mario Limonciello Reviewed-by: Rijo Thomas Tested-by: Rijo Thomas Signed-off-by: Herbert Xu Stable-dep-of: 7b85137caf11 ("crypto: ccp - Send PSP_CMD_TEE_RING_DESTROY when PSP_CMD_TEE_RING_INIT fails") Signed-off-by: Sasha Levin

crypto: ccp - Add an S4 restore flow

2026-03-04T12:20:00+00:00

[ Upstream commit 0ba2035026d0ab6c7c7e65ad8b418dc73d5700d9 ] The system will have lost power during S4. The ring used for TEE communications needs to be initialized before use. Fixes: f892a21f51162 ("crypto: ccp - use generic power management") Reported-by: Lars Francke Closes: https://lore.kernel.org/platform-driver-x86/CAD-Ua_gfJnQSo8ucS_7ZwzuhoBRJ14zXP7s8b-zX3ZcxcyWePw@mail.gmail.com/ Tested-by: Yijun Shen Signed-off-by: Mario Limonciello (AMD) Reviewed-by: Shyam Sundar S K Reviewed-by: Tom Lendacky Link: https://patch.msgid.link/20260116041132.153674-4-superm1@kernel.org Signed-off-by: Ilpo Järvinen Signed-off-by: Sasha Levin

crypto: ccp - Add support for fetching a nonce for dynamic boost control

2023-07-20T10:14:21+00:00

Dynamic Boost Control is a feature offered on AMD client platforms that allows software to request and set power or frequency limits. Only software that has authenticated with the PSP can retrieve or set these limits. Create a character device and ioctl for fetching the nonce. This ioctl supports optionally passing authentication information which will influence how many calls the nonce is valid for. Acked-by: Tom Lendacky Signed-off-by: Mario Limonciello Signed-off-by: Herbert Xu

crypto: ccp - Add support for displaying PSP firmware versions

2023-07-20T10:13:16+00:00

As it's not always obvious what PSP bootloader or TEE version are present in OEM systems, add the ability to get this information from sysfs for supported platforms. Acked-by: Tom Lendacky Signed-off-by: Mario Limonciello Signed-off-by: Herbert Xu

crypto: ccp - Add support for ringing a platform doorbell

2023-03-17T03:16:43+00:00

Some platforms support using a doorbell to communicate. Export this feature for other drivers to utilize as well. Link: https://lore.kernel.org/linux-i2c/20220916131854.687371-3-jsd@semihalf.com/ Suggested-by: Jan Dabros Signed-off-by: Mario Limonciello Signed-off-by: Herbert Xu

crypto: ccp - Add support for an interface for platform features

2023-03-17T03:16:43+00:00

Some platforms with a PSP support an interface for features that interact directly with the PSP instead of through a SEV or TEE environment. Initialize this interface so that other drivers can consume it. These drivers may either be subdrivers for the ccp module or external modules. For external modules, export a symbol for them to utilize. Acked-by: Tom Lendacky Signed-off-by: Mario Limonciello Signed-off-by: Herbert Xu

crypto: ccp - Make ccp_dev_suspend and ccp_dev_resume void functions

2021-04-22T07:31:31+00:00

Since ccp_dev_suspend() and ccp_dev_resume() only return 0 which causes ret to equal 0 in sp_suspend and sp_resume, making the if condition impossible to use. it might be a more appropriate fix to have these be void functions and eliminate the if condition in sp_suspend() and sp_resume(). Signed-off-by: Tian Tao Cc: Herbert Xu Cc: "David S. Miller" Cc: Tom Lendacky Acked-by: Tom Lendacky Acked-by: John Allen Signed-off-by: Herbert Xu

crypto: ccp - use generic power management

2020-07-31T08:25:26+00:00

Drivers using legacy power management .suspen()/.resume() callbacks have to manage PCI states and device's PM states themselves. They also need to take care of standard configuration registers. Switch to generic power management framework using a single "struct dev_pm_ops" variable to take the unnecessary load from the driver. This also avoids the need for the driver to directly call most of the PCI helper functions and device power state control functions as through the generic framework, PCI Core takes care of the necessary operations, and drivers are required to do only device-specific jobs. Signed-off-by: Vaibhav Gupta Acked-by: John Allen Signed-off-by: Herbert Xu

crypto: ccp - Cleanup sp_dev_master in psp_dev_destroy()

2020-03-12T12:00:12+00:00

Introduce clear_psp_master_device() to ensure that sp_dev_master gets properly cleared on the release of a psp device. Fixes: 2a6170dfe755 ("crypto: ccp: Add Platform Security Processor (PSP) device support") Signed-off-by: John Allen Acked-by: Tom Lendacky Signed-off-by: Herbert Xu

crypto: ccp - add TEE support for Raven Ridge

2019-12-20T06:58:32+00:00

Adds a PCI device entry for Raven Ridge. Raven Ridge is an APU with a dedicated AMD Secure Processor having Trusted Execution Environment (TEE) support. The TEE provides a secure environment for running Trusted Applications (TAs) which implement security-sensitive parts of a feature. This patch configures AMD Secure Processor's TEE interface by initializing a ring buffer (shared memory between Rich OS and Trusted OS) which can hold multiple command buffer entries. The TEE interface is facilitated by a set of CPU to PSP mailbox registers. The next patch will address how commands are submitted to the ring buffer. Cc: Jens Wiklander Cc: Tom Lendacky Cc: Ard Biesheuvel Co-developed-by: Devaraj Rangasamy Signed-off-by: Devaraj Rangasamy Signed-off-by: Rijo Thomas Acked-by: Gary R Hook Signed-off-by: Herbert Xu