mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-26 22:24:09 +08:00
ec310caf13
Currently, there is no privilege separation of the SEV command; you can
run them all or none of them. This is less than ideal because it means
that a compromise of the code which launches VMs could make permanent
change to the SEV certifcate chain which will affect others.
These commands are required to attest the VM environment:
- SEV_PDH_CERT_EXPORT
- SEV_PLATFORM_STATUS
- SEV_GET_{ID,ID2}
These commands manage the SEV certificate chain:
- SEV_PEK_CERR_IMPORT
- SEV_FACTORY_RESET
- SEV_PEK_GEN
- SEV_PEK_CSR
- SEV_PDH_GEN
Lets add the CAP_SYS_ADMIN check for the group of the commands which alters
the SEV certificate chain to provide some level of privilege separation.
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Gary Hook <gary.hook@amd.com>
Cc: Erdem Aktas <erdemaktas@google.com>
Cc: Tom Lendacky <Thomas.Lendacky@amd.com>
Tested-by: David Rientjes <rientjes@google.com>
Co-developed-by: David Rientjes <rientjes@google.com>
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
68 lines
1.4 KiB
C
68 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* AMD Platform Security Processor (PSP) interface driver
|
|
*
|
|
* Copyright (C) 2017-2018 Advanced Micro Devices, Inc.
|
|
*
|
|
* Author: Brijesh Singh <brijesh.singh@amd.com>
|
|
*/
|
|
|
|
#ifndef __PSP_DEV_H__
|
|
#define __PSP_DEV_H__
|
|
|
|
#include <linux/device.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 <linux/capability.h>
|
|
|
|
#include "sp-dev.h"
|
|
|
|
#define PSP_CMD_COMPLETE BIT(1)
|
|
|
|
#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 */
|