linux - linux

	Commit message (Collapse)	Author	Age	Files	Lines
*	crypto: ccp - Represent capabilities register as a union	Mario Limonciello	2024-06-07	1	-1/+1
\| \| \| \| \| \| \| \| \| \| \| \|	Making the capabilities register a union makes it easier to refer to the members instead of always doing bit shifts. No intended functional changes. Acked-by: Tom Lendacky <thomas.lendacky@amd.com> Suggested-by: Yazen Ghannam <yazen.ghannam@amd.com> Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
*	crypto: ccp - Add support for DBC over PSP mailbox	Mario Limonciello	2023-09-15	1	-10/+33
\| \| \| \| \| \| \| \| \| \|	On some SOCs DBC is supported through the PSP mailbox instead of the platform mailbox. This capability is advertised in the PSP capabilities register. Allow using this communication path if supported. Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
*	crypto: ccp - Add a communication path abstraction for DBC	Mario Limonciello	2023-09-15	1	-19/+18
\| \| \| \| \| \| \| \| \| \| \|	DBC is currently accessed only from the platform access mailbox and a lot of that implementation's communication path is intertwined with DBC. Add an abstraction layer for pointers into the mailbox. No intended functional changes. Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
*	crypto: ccp - Get a free page to use while fetching initial nonce	Mario Limonciello	2023-09-15	1	-1/+1
\| \| \| \| \| \| \| \| \| \| \|	dbc_dev_init() gets a free page from `GFP_KERNEL`, but if that page has any data in it the first nonce request will fail. This prevents dynamic boost control from probing. To fix this, explicitly request a zeroed page with `__GFP_ZERO` to ensure first nonce fetch works. Fixes: c04cf9e14f10 ("crypto: ccp - Add support for fetching a nonce for dynamic boost control") Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
*	crypto: ccp - Add support for getting and setting DBC parameters	Mario Limonciello	2023-07-20	1	-0/+41
\| \| \| \| \| \| \| \| \| \| \| \|	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 <thomas.lendacky@amd.com> Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
*	crypto: ccp - Add support for setting user ID for dynamic boost control	Mario Limonciello	2023-07-20	1	-0/+18
\| \| \| \| \| \| \| \| \| \| \| \|	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 <thomas.lendacky@amd.com> Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
*	crypto: ccp - Add support for fetching a nonce for dynamic boost control	Mario Limonciello	2023-07-20	1	-0/+191
	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 <thomas.lendacky@amd.com> Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>