forked from Minki/linux
38103671aa
Drop the dedicated status_cmd_buf and instead use a local variable for PLATFORM_STATUS. Now that the low level helper uses an internal buffer for all commands, using the stack for the upper layers is safe even when running with CONFIG_VMAP_STACK=y. Signed-off-by: Sean Christopherson <seanjc@google.com> Message-Id: <20210406224952.4177376-7-seanjc@google.com> Reviewed-by: Brijesh Singh <brijesh.singh@amd.com> Acked-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
65 lines
1.3 KiB
C
65 lines
1.3 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 __SEV_DEV_H__
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#define __SEV_DEV_H__
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#include <linux/device.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 <linux/capability.h>
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#define SEV_CMD_COMPLETE BIT(1)
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#define SEV_CMDRESP_CMD_SHIFT 16
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#define SEV_CMDRESP_IOC BIT(0)
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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 sev_device {
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struct device *dev;
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struct psp_device *psp;
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void __iomem *io_regs;
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struct sev_vdata *vdata;
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int state;
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unsigned int int_rcvd;
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wait_queue_head_t int_queue;
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struct sev_misc_dev *misc;
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struct sev_data_init init_cmd_buf;
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u8 api_major;
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u8 api_minor;
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u8 build;
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void *cmd_buf;
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};
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int sev_dev_init(struct psp_device *psp);
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void sev_dev_destroy(struct psp_device *psp);
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void sev_pci_init(void);
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void sev_pci_exit(void);
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#endif /* __SEV_DEV_H */
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