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200664d523
AMD's new Secure Encrypted Virtualization (SEV) feature allows the memory contents of virtual machines to be transparently encrypted with a key unique to the VM. The programming and management of the encryption keys are handled by the AMD Secure Processor (AMD-SP) which exposes the commands for these tasks. The complete spec is available at: http://support.amd.com/TechDocs/55766_SEV-KM%20API_Specification.pdf Extend the AMD-SP driver to provide the following support: - an in-kernel API to communicate with the SEV firmware. The API can be used by the hypervisor to create encryption context for a SEV guest. - a userspace IOCTL to manage the platform certificates. Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: "Radim Krčmář" <rkrcmar@redhat.com> Cc: Borislav Petkov <bp@suse.de> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Gary Hook <gary.hook@amd.com> Cc: Tom Lendacky <thomas.lendacky@amd.com> Cc: linux-crypto@vger.kernel.org Cc: kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org Improvements-by: Borislav Petkov <bp@suse.de> Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
84 lines
2.0 KiB
C
84 lines
2.0 KiB
C
/*
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* AMD Platform Security Processor (PSP) interface driver
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*
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* Copyright (C) 2017 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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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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/pci.h>
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#include <linux/spinlock.h>
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#include <linux/mutex.h>
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#include <linux/list.h>
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#include <linux/wait.h>
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#include <linux/dmapool.h>
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#include <linux/hw_random.h>
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#include <linux/bitops.h>
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#include <linux/interrupt.h>
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#include <linux/irqreturn.h>
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#include <linux/dmaengine.h>
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#include <linux/psp-sev.h>
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#include <linux/miscdevice.h>
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#include "sp-dev.h"
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#define PSP_C2PMSG(_num) ((_num) << 2)
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#define PSP_CMDRESP PSP_C2PMSG(32)
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#define PSP_CMDBUFF_ADDR_LO PSP_C2PMSG(56)
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#define PSP_CMDBUFF_ADDR_HI PSP_C2PMSG(57)
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#define PSP_FEATURE_REG PSP_C2PMSG(63)
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#define PSP_P2CMSG(_num) ((_num) << 2)
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#define PSP_CMD_COMPLETE_REG 1
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#define PSP_CMD_COMPLETE PSP_P2CMSG(PSP_CMD_COMPLETE_REG)
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#define PSP_P2CMSG_INTEN 0x0110
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#define PSP_P2CMSG_INTSTS 0x0114
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#define PSP_C2PMSG_ATTR_0 0x0118
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#define PSP_C2PMSG_ATTR_1 0x011c
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#define PSP_C2PMSG_ATTR_2 0x0120
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#define PSP_C2PMSG_ATTR_3 0x0124
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#define PSP_P2CMSG_ATTR_0 0x0128
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#define PSP_CMDRESP_CMD_SHIFT 16
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#define PSP_CMDRESP_IOC BIT(0)
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#define PSP_CMDRESP_RESP BIT(31)
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#define PSP_CMDRESP_ERR_MASK 0xffff
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#define MAX_PSP_NAME_LEN 16
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struct sev_misc_dev {
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struct kref refcount;
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struct miscdevice misc;
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};
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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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int sev_state;
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unsigned int sev_int_rcvd;
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wait_queue_head_t sev_int_queue;
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struct sev_misc_dev *sev_misc;
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struct sev_user_data_status status_cmd_buf;
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struct sev_data_init init_cmd_buf;
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};
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#endif /* __PSP_DEV_H */
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