c04cf9e14f
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>
75 lines
1.8 KiB
C
75 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* AMD Platform Security Processor (PSP) interface driver
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*
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* Copyright (C) 2017-2019 Advanced Micro Devices, Inc.
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*
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* Author: Brijesh Singh <brijesh.singh@amd.com>
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*/
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#ifndef __PSP_DEV_H__
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#define __PSP_DEV_H__
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#include <linux/device.h>
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#include <linux/list.h>
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#include <linux/bits.h>
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#include <linux/interrupt.h>
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#include "sp-dev.h"
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#define MAX_PSP_NAME_LEN 16
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extern struct psp_device *psp_master;
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typedef void (*psp_irq_handler_t)(int, void *, unsigned int);
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struct psp_device {
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struct list_head entry;
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struct psp_vdata *vdata;
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char name[MAX_PSP_NAME_LEN];
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struct device *dev;
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struct sp_device *sp;
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void __iomem *io_regs;
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psp_irq_handler_t sev_irq_handler;
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void *sev_irq_data;
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void *sev_data;
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void *tee_data;
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void *platform_access_data;
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void *dbc_data;
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unsigned int capability;
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};
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void psp_set_sev_irq_handler(struct psp_device *psp, psp_irq_handler_t handler,
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void *data);
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void psp_clear_sev_irq_handler(struct psp_device *psp);
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struct psp_device *psp_get_master_device(void);
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#define PSP_CAPABILITY_SEV BIT(0)
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#define PSP_CAPABILITY_TEE BIT(1)
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#define PSP_CAPABILITY_PSP_SECURITY_REPORTING BIT(7)
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#define PSP_CAPABILITY_PSP_SECURITY_OFFSET 8
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/*
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* The PSP doesn't directly store these bits in the capability register
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* but instead copies them from the results of query command.
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*
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* The offsets from the query command are below, and shifted when used.
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*/
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#define PSP_SECURITY_FUSED_PART BIT(0)
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#define PSP_SECURITY_DEBUG_LOCK_ON BIT(2)
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#define PSP_SECURITY_TSME_STATUS BIT(5)
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#define PSP_SECURITY_ANTI_ROLLBACK_STATUS BIT(7)
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#define PSP_SECURITY_RPMC_PRODUCTION_ENABLED BIT(8)
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#define PSP_SECURITY_RPMC_SPIROM_AVAILABLE BIT(9)
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#define PSP_SECURITY_HSP_TPM_AVAILABLE BIT(10)
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#define PSP_SECURITY_ROM_ARMOR_ENFORCED BIT(11)
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#endif /* __PSP_DEV_H */
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