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path: root/include/linux/psp-platform-access.h
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2023-07-20crypto: ccp - Add support for getting and setting DBC parametersMario Limonciello1-0/+2
After software has authenticated a dynamic boost control request, it can fetch and set supported parameters using a selection of messages. Add support for these messages and export the ability to do this to userspace. Acked-by: Tom Lendacky <[email protected]> Signed-off-by: Mario Limonciello <[email protected]> Signed-off-by: Herbert Xu <[email protected]>
2023-07-20crypto: ccp - Add support for setting user ID for dynamic boost controlMario Limonciello1-0/+1
As part of the authentication flow for Dynamic Boost Control, the calling software will need to send a uid used in all of its future communications. Add support for another IOCTL call to let userspace software set this up. Acked-by: Tom Lendacky <[email protected]> Signed-off-by: Mario Limonciello <[email protected]> Signed-off-by: Herbert Xu <[email protected]>
2023-07-20crypto: ccp - Add support for fetching a nonce for dynamic boost controlMario Limonciello1-0/+1
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 <[email protected]> Signed-off-by: Mario Limonciello <[email protected]> Signed-off-by: Herbert Xu <[email protected]>
2023-04-20i2c: designware: Use PCI PSP driver for communicationMario Limonciello1-0/+1
Currently the PSP semaphore communication base address is discovered by using an MSR that is not architecturally guaranteed for future platforms. Also the mailbox that is utilized for communication with the PSP may have other consumers in the kernel, so it's better to make all communication go through a single driver. Signed-off-by: Mario Limonciello <[email protected]> Reviewed-by: Mark Hasemeyer <[email protected]> Acked-by: Jarkko Nikula <[email protected]> Tested-by: Mark Hasemeyer <[email protected]> Acked-by: Wolfram Sang <[email protected]> Signed-off-by: Herbert Xu <[email protected]>
2023-04-14crypto: ccp - Return doorbell status code as an argumentMario Limonciello1-2/+2
If the doorbell failed to ring we return -EIO, but the caller can't determine why it failed. Pass the reason for the failure in an argument for caller to investigate. Suggested-by: Mark Hasemeyer <[email protected]> Signed-off-by: Mario Limonciello <[email protected]> Reviewed-by: Mark Hasemeyer <[email protected]> Tested-by: Mark Hasemeyer <[email protected]> Signed-off-by: Herbert Xu <[email protected]>
2023-03-17crypto: ccp - Add support for ringing a platform doorbellMario Limonciello1-0/+15
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/[email protected]/ Suggested-by: Jan Dabros <[email protected]> Signed-off-by: Mario Limonciello <[email protected]> Signed-off-by: Herbert Xu <[email protected]>
2023-03-17crypto: ccp - Add support for an interface for platform featuresMario Limonciello1-0/+49
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 <[email protected]> Signed-off-by: Mario Limonciello <[email protected]> Signed-off-by: Herbert Xu <[email protected]>
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