Linux kernel stable tree (mirror) https://git.radix-linux.su/kernel/linux.git/atom?h=v6.6.148 2023-11-20T10:59:18+00:00 2023-11-20T10:59:18+00:00 Mario Limonciello mario.limonciello@amd.com 2023-08-29T15:07:55+00:00 urn:sha1:4c2c057d771c956c6a4504a46ed416725bbe50ee [ Upstream commit 53f7f779f45cbe1771bc4ae05f0320e204a18611 ] 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> Signed-off-by: Sasha Levin <sashal@kernel.org> 2023-07-20T10:14:21+00:00 Mario Limonciello mario.limonciello@amd.com 2023-06-23T13:49:57+00:00 urn:sha1:e2cfe05e9277b5a7abbbc186fec1ad37348dd956 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> 2023-07-20T10:14:21+00:00 Mario Limonciello mario.limonciello@amd.com 2023-06-23T13:49:56+00:00 urn:sha1:d9408716d2126439fbc46f6c40e72792069b8411 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> 2023-07-20T10:14:21+00:00 Mario Limonciello mario.limonciello@amd.com 2023-06-23T13:49:55+00:00 urn:sha1:c04cf9e14f109ebcc425c1efd2c01294c52a4d62 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>