edd303ff0e
The DOWNLOAD_FIRMWARE command, added as of SEV API v0.15, allows the OS to install SEV firmware newer than the currently active SEV firmware. For the new SEV firmware to be applied it must: * Pass the validation test performed by the existing firmware. * Be of the same build or a newer build compared to the existing firmware. For more information please refer to "Section 5.11 DOWNLOAD_FIRMWARE" of https://support.amd.com/TechDocs/55766_SEV-KM%20API_Specification.pdf Signed-off-by: Janakarajan Natarajan <Janakarajan.Natarajan@amd.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
88 lines
2 KiB
C
88 lines
2 KiB
C
/*
|
|
* AMD Platform Security Processor (PSP) interface driver
|
|
*
|
|
* Copyright (C) 2017 Advanced Micro Devices, Inc.
|
|
*
|
|
* Author: Brijesh Singh <brijesh.singh@amd.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#ifndef __PSP_DEV_H__
|
|
#define __PSP_DEV_H__
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/list.h>
|
|
#include <linux/wait.h>
|
|
#include <linux/dmapool.h>
|
|
#include <linux/hw_random.h>
|
|
#include <linux/bitops.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/irqreturn.h>
|
|
#include <linux/dmaengine.h>
|
|
#include <linux/psp-sev.h>
|
|
#include <linux/miscdevice.h>
|
|
|
|
#include "sp-dev.h"
|
|
|
|
#define PSP_C2PMSG(_num) ((_num) << 2)
|
|
#define PSP_CMDRESP PSP_C2PMSG(32)
|
|
#define PSP_CMDBUFF_ADDR_LO PSP_C2PMSG(56)
|
|
#define PSP_CMDBUFF_ADDR_HI PSP_C2PMSG(57)
|
|
#define PSP_FEATURE_REG PSP_C2PMSG(63)
|
|
|
|
#define PSP_P2CMSG(_num) ((_num) << 2)
|
|
#define PSP_CMD_COMPLETE_REG 1
|
|
#define PSP_CMD_COMPLETE PSP_P2CMSG(PSP_CMD_COMPLETE_REG)
|
|
|
|
#define PSP_P2CMSG_INTEN 0x0110
|
|
#define PSP_P2CMSG_INTSTS 0x0114
|
|
|
|
#define PSP_C2PMSG_ATTR_0 0x0118
|
|
#define PSP_C2PMSG_ATTR_1 0x011c
|
|
#define PSP_C2PMSG_ATTR_2 0x0120
|
|
#define PSP_C2PMSG_ATTR_3 0x0124
|
|
#define PSP_P2CMSG_ATTR_0 0x0128
|
|
|
|
#define PSP_CMDRESP_CMD_SHIFT 16
|
|
#define PSP_CMDRESP_IOC BIT(0)
|
|
#define PSP_CMDRESP_RESP BIT(31)
|
|
#define PSP_CMDRESP_ERR_MASK 0xffff
|
|
|
|
#define MAX_PSP_NAME_LEN 16
|
|
|
|
struct sev_misc_dev {
|
|
struct kref refcount;
|
|
struct miscdevice misc;
|
|
};
|
|
|
|
struct psp_device {
|
|
struct list_head entry;
|
|
|
|
struct psp_vdata *vdata;
|
|
char name[MAX_PSP_NAME_LEN];
|
|
|
|
struct device *dev;
|
|
struct sp_device *sp;
|
|
|
|
void __iomem *io_regs;
|
|
|
|
int sev_state;
|
|
unsigned int sev_int_rcvd;
|
|
wait_queue_head_t sev_int_queue;
|
|
struct sev_misc_dev *sev_misc;
|
|
struct sev_user_data_status status_cmd_buf;
|
|
struct sev_data_init init_cmd_buf;
|
|
|
|
u8 api_major;
|
|
u8 api_minor;
|
|
u8 build;
|
|
};
|
|
|
|
#endif /* __PSP_DEV_H */
|