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

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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>
This commit is contained in:
Mario Limonciello
2023-06-23 08:49:55 -05:00
committed by Herbert Xu
parent b8440d55f7
commit c04cf9e14f
9 changed files with 321 additions and 1 deletions
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5
drivers/crypto/ccp/sp-dev.h
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@@ -28,6 +28,10 @@
#define CACHE_NONE 0x00
#define CACHE_WB_NO_ALLOC 0xb7
#define PLATFORM_FEATURE_DBC 0x1
#define PSP_FEATURE(psp, feat) (psp->vdata && psp->vdata->platform_features & PLATFORM_FEATURE_##feat)
/* Structure to hold CCP device data */
struct ccp_device;
struct ccp_vdata {
@@ -71,6 +75,7 @@ struct psp_vdata {
const unsigned int inten_reg;
const unsigned int intsts_reg;
const unsigned int bootloader_info_reg;
const unsigned int platform_features;
};
/* Structure to hold SP device data */