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path: root/include/linux/psp-platform-access.h
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2024-06-07crypto: ccp - Add support for getting security attributes on some older systemsMario Limonciello
Older systems will not populate the security attributes in the capabilities register. The PSP on these systems, however, does have a command to get the security attributes. Use this command during ccp startup to populate the attributes if they're missing. Closes: https://github.com/fwupd/fwupd/issues/5284 Closes: https://github.com/fwupd/fwupd/issues/5675 Closes: https://github.com/fwupd/fwupd/issues/6253 Closes: https://github.com/fwupd/fwupd/issues/7280 Closes: https://github.com/fwupd/fwupd/issues/6323 Closes: https://github.com/fwupd/fwupd/discussions/5433 Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> Acked-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2024-06-07crypto: ccp - align psp_platform_access_msgMario Limonciello
Align the whitespace so that future messages will also be better aligned. 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>
2023-07-20crypto: ccp - Add support for getting and setting DBC parametersMario Limonciello
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>
2023-07-20crypto: ccp - Add support for setting user ID for dynamic boost controlMario Limonciello
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>
2023-07-20crypto: ccp - Add support for fetching a nonce for dynamic boost controlMario Limonciello
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>
2023-04-20i2c: designware: Use PCI PSP driver for communicationMario Limonciello
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 <mario.limonciello@amd.com> Reviewed-by: Mark Hasemeyer <markhas@chromium.org> Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Tested-by: Mark Hasemeyer <markhas@chromium.org> Acked-by: Wolfram Sang <wsa@kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2023-04-14crypto: ccp - Return doorbell status code as an argumentMario Limonciello
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 <markhas@chromium.org> Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> Reviewed-by: Mark Hasemeyer <markhas@chromium.org> Tested-by: Mark Hasemeyer <markhas@chromium.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2023-03-17crypto: ccp - Add support for ringing a platform doorbellMario Limonciello
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 <jsd@semihalf.com> Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2023-03-17crypto: ccp - Add support for an interface for platform featuresMario Limonciello
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 <thomas.lendacky@amd.com> Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>